Merge pull request #10 from mysterywolf/v2.5.0upstream

V2.5.0upstream

.github/workflows/post-release.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   post-release:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       # trigger post-release in dependency repo, this indirection allows the
       # dependency repo to be updated often without affecting this repo. At

.github/workflows/release.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   release:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
 
     # need to manually check for a couple things
     # - tests passed?
@@ -73,89 +73,70 @@ jobs:
           # previous results to compare against?
           [ -n "$LFS_PREV_VERSION" ] && curl -sS \
             "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/`
-              `status/$LFS_PREV_VERSION" \
+              `status/$LFS_PREV_VERSION?per_page=100" \
             | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]' \
             >> prev-results.json \
             || true
 
-          # unfortunately these each have their own format
-          [ -e results/code-thumb.csv ] && ( \
-            export PREV="$(jq -re '
-                  select(.context == "results / code").description
-                  | capture("Code size is (?<result>[0-9]+)").result' \
-                prev-results.json || echo 0)"
-            ./scripts/code.py -u results/code-thumb.csv -s | awk '
-              NR==2 {printf "Code size,%d B",$2}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
-              NR==2 {printf "\n"}' \
-            >> results.csv)
-          [ -e results/code-thumb-readonly.csv ] && ( \
-            export PREV="$(jq -re '
-                  select(.context == "results / code (readonly)").description
-                  | capture("Code size is (?<result>[0-9]+)").result' \
-                prev-results.json || echo 0)"
-            ./scripts/code.py -u results/code-thumb-readonly.csv -s | awk '
-              NR==2 {printf "Code size<br/>(readonly),%d B",$2}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
-              NR==2 {printf "\n"}' \
-            >> results.csv)
-          [ -e results/code-thumb-threadsafe.csv ] && ( \
-            export PREV="$(jq -re '
-                  select(.context == "results / code (threadsafe)").description
-                  | capture("Code size is (?<result>[0-9]+)").result' \
-                prev-results.json || echo 0)"
-            ./scripts/code.py -u results/code-thumb-threadsafe.csv -s | awk '
-              NR==2 {printf "Code size<br/>(threadsafe),%d B",$2}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
-              NR==2 {printf "\n"}' \
-            >> results.csv)
-          [ -e results/code-thumb-migrate.csv ] && ( \
-            export PREV="$(jq -re '
-                  select(.context == "results / code (migrate)").description
-                  | capture("Code size is (?<result>[0-9]+)").result' \
-                prev-results.json || echo 0)"
-            ./scripts/code.py -u results/code-thumb-migrate.csv -s | awk '
-              NR==2 {printf "Code size<br/>(migrate),%d B",$2}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
-              NR==2 {printf "\n"}' \
-            >> results.csv)
-          [ -e results/code-thumb-error-asserts.csv ] && ( \
-            export PREV="$(jq -re '
-                  select(.context == "results / code (error-asserts)").description
-                  | capture("Code size is (?<result>[0-9]+)").result' \
-                prev-results.json || echo 0)"
-            ./scripts/code.py -u results/code-thumb-error-asserts.csv -s | awk '
-              NR==2 {printf "Code size<br/>(error-asserts),%d B",$2}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
-              NR==2 {printf "\n"}' \
-            >> results.csv)
-          [ -e results/coverage.csv ] && ( \
-            export PREV="$(jq -re '
-                  select(.context == "results / coverage").description
-                  | capture("Coverage is (?<result>[0-9\\.]+)").result' \
-                prev-results.json || echo 0)"
-            ./scripts/coverage.py -u results/coverage.csv -s | awk -F '[ /%]+' '
-              NR==2 {printf "Coverage,%.1f%% of %d lines",$4,$3}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",$4-ENVIRON["PREV"]}
-              NR==2 {printf "\n"}' \
-            >> results.csv)
-
-          # transpose to GitHub table
-          [ -e results.csv ] || exit 0
-          awk -F ',' '
-            {label[NR]=$1; value[NR]=$2}
-            END {
-              for (r=1; r<=NR; r++) {printf "| %s ",label[r]}; printf "|\n";
-              for (r=1; r<=NR; r++) {printf "|:--"}; printf "|\n";
-              for (r=1; r<=NR; r++) {printf "| %s ",value[r]}; printf "|\n"}' \
-            results.csv > results.txt
-          echo "RESULTS:"
+          # build table for GitHub
+          echo "<table>" >> results.txt
+          echo "<thead>" >> results.txt
+          echo "<tr>" >> results.txt
+          echo "<th align=left>Configuration</th>" >> results.txt
+          for r in Code Stack Structs Coverage
+          do
+            echo "<th align=right>$r</th>" >> results.txt
+          done
+          echo "</tr>" >> results.txt
+          echo "</thead>" >> results.txt
+
+          echo "<tbody>" >> results.txt
+          for c in "" readonly threadsafe migrate error-asserts
+          do
+            echo "<tr>" >> results.txt
+            c_or_default=${c:-default}
+            echo "<td align=left>${c_or_default^}</td>" >> results.txt
+            for r in code stack structs
+            do
+              # per-config results
+              echo "<td align=right>" >> results.txt
+              [ -e results/thumb${c:+-$c}.csv ] && ( \
+                export PREV="$(jq -re '
+                      select(.context == "'"results (thumb${c:+, $c}) / $r"'").description
+                      | capture("(?<result>[0-9∞]+)").result' \
+                    prev-results.json || echo 0)"
+                ./scripts/summary.py results/thumb${c:+-$c}.csv -f $r -Y | awk '
+                  NR==2 {printf "%s B",$2}
+                  NR==2 && ENVIRON["PREV"]+0 != 0 {
+                    printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}
+                  NR==2 {printf "\n"}' \
+                | sed -e 's/ /\&nbsp;/g' \
+                >> results.txt)
+              echo "</td>" >> results.txt
+            done
+            # coverage results
+            if [ -z $c ]
+            then
+              echo "<td rowspan=0 align=right>" >> results.txt
+              [ -e results/coverage.csv ] && ( \
+                export PREV="$(jq -re '
+                      select(.context == "results / coverage").description
+                      | capture("(?<result>[0-9\\.]+)").result' \
+                    prev-results.json || echo 0)"
+                ./scripts/coverage.py -u results/coverage.csv -Y | awk -F '[ /%]+' '
+                  NR==2 {printf "%.1f%% of %d lines",$4,$3}
+                  NR==2 && ENVIRON["PREV"]+0 != 0 {
+                    printf " (%+.1f%%)",$4-ENVIRON["PREV"]}
+                  NR==2 {printf "\n"}' \
+                | sed -e 's/ /\&nbsp;/g' \
+                >> results.txt)
+              echo "</td>" >> results.txt
+            fi
+            echo "</tr>" >> results.txt
+          done
+          echo "</tbody>" >> results.txt
+          echo "</table>" >> results.txt
+
           cat results.txt
 
       # find changes from history

.github/workflows/status.yml

@@ -6,7 +6,7 @@ on:
 
 jobs:
   status:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       # custom statuses?
       - uses: dawidd6/action-download-artifact@v2

.github/workflows/test.yml

@@ -8,7 +8,7 @@ env:
 jobs:
   # run tests
   test:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix:
@@ -18,11 +18,27 @@ jobs:
       - uses: actions/checkout@v2
       - name: install
         run: |
-          # need toml, also pip3 isn't installed by default?
+          # need a few additional tools
+          #
+          # note this includes gcc-10, which is required for -fcallgraph-info=su
           sudo apt-get update -qq
-          sudo apt-get install -qq python3 python3-pip lcov
+          sudo apt-get install -qq gcc-10 python3 python3-pip lcov
           sudo pip3 install toml
-          gcc --version
+          echo "CC=gcc-10" >> $GITHUB_ENV
+          gcc-10 --version
+          lcov --version
+          python3 --version
+
+          # need newer lcov version for gcc-10
+          #sudo apt-get remove lcov
+          #wget https://launchpad.net/ubuntu/+archive/primary/+files/lcov_1.15-1_all.deb
+          #sudo apt install ./lcov_1.15-1_all.deb
+          #lcov --version
+          #which lcov
+          #ls -lha /usr/bin/lcov
+          wget https://github.com/linux-test-project/lcov/releases/download/v1.15/lcov-1.15.tar.gz
+          tar xf lcov-1.15.tar.gz
+          sudo make -C lcov-1.15 install
 
           # setup a ram-backed disk to speed up reentrant tests
           mkdir disks
@@ -41,36 +57,36 @@ jobs:
         if: ${{matrix.arch == 'thumb'}}
         run: |
           sudo apt-get install -qq \
-            gcc-arm-linux-gnueabi \
+            gcc-10-arm-linux-gnueabi \
             libc6-dev-armel-cross \
             qemu-user
-          echo "CC=arm-linux-gnueabi-gcc -mthumb --static" >> $GITHUB_ENV
+          echo "CC=arm-linux-gnueabi-gcc-10 -mthumb --static" >> $GITHUB_ENV
           echo "EXEC=qemu-arm" >> $GITHUB_ENV
-          arm-linux-gnueabi-gcc --version
+          arm-linux-gnueabi-gcc-10 --version
           qemu-arm -version
       # cross-compile with MIPS (32-bit, big-endian)
       - name: install-mips
         if: ${{matrix.arch == 'mips'}}
         run: |
           sudo apt-get install -qq \
-            gcc-mips-linux-gnu \
+            gcc-10-mips-linux-gnu \
             libc6-dev-mips-cross \
             qemu-user
-          echo "CC=mips-linux-gnu-gcc --static" >> $GITHUB_ENV
+          echo "CC=mips-linux-gnu-gcc-10 --static" >> $GITHUB_ENV
           echo "EXEC=qemu-mips" >> $GITHUB_ENV
-          mips-linux-gnu-gcc --version
+          mips-linux-gnu-gcc-10 --version
           qemu-mips -version
       # cross-compile with PowerPC (32-bit, big-endian)
       - name: install-powerpc
         if: ${{matrix.arch == 'powerpc'}}
         run: |
           sudo apt-get install -qq \
-            gcc-powerpc-linux-gnu \
+            gcc-10-powerpc-linux-gnu \
             libc6-dev-powerpc-cross \
             qemu-user
-          echo "CC=powerpc-linux-gnu-gcc --static" >> $GITHUB_ENV
+          echo "CC=powerpc-linux-gnu-gcc-10 --static" >> $GITHUB_ENV
           echo "EXEC=qemu-ppc" >> $GITHUB_ENV
-          powerpc-linux-gnu-gcc --version
+          powerpc-linux-gnu-gcc-10 --version
           qemu-ppc -version
 
       # make sure example can at least compile
@@ -148,102 +164,108 @@ jobs:
           retention-days: 1
 
       # update results
-      - name: results-code
+      - name: results
         run: |
           mkdir -p results
           make clean
-          make code \
+          make lfs.csv \
             CFLAGS+=" \
               -DLFS_NO_ASSERT \
               -DLFS_NO_DEBUG \
               -DLFS_NO_WARN \
-              -DLFS_NO_ERROR" \
-            CODEFLAGS+="-o results/code-${{matrix.arch}}.csv"
-      - name: results-code-readonly
+              -DLFS_NO_ERROR"
+          cp lfs.csv results/${{matrix.arch}}.csv
+          ./scripts/summary.py results/${{matrix.arch}}.csv
+      - name: results-readonly
         run: |
           mkdir -p results
           make clean
-          make code \
+          make lfs.csv \
             CFLAGS+=" \
               -DLFS_NO_ASSERT \
               -DLFS_NO_DEBUG \
               -DLFS_NO_WARN \
               -DLFS_NO_ERROR \
-              -DLFS_READONLY" \
-            CODEFLAGS+="-o results/code-${{matrix.arch}}-readonly.csv"
-      - name: results-code-threadsafe
+              -DLFS_READONLY"
+          cp lfs.csv results/${{matrix.arch}}-readonly.csv
+          ./scripts/summary.py results/${{matrix.arch}}-readonly.csv
+      - name: results-threadsafe
         run: |
           mkdir -p results
           make clean
-          make code \
+          make lfs.csv \
             CFLAGS+=" \
               -DLFS_NO_ASSERT \
               -DLFS_NO_DEBUG \
               -DLFS_NO_WARN \
               -DLFS_NO_ERROR \
-              -DLFS_THREADSAFE" \
-            CODEFLAGS+="-o results/code-${{matrix.arch}}-threadsafe.csv"
-      - name: results-code-migrate
+              -DLFS_THREADSAFE"
+          cp lfs.csv results/${{matrix.arch}}-threadsafe.csv
+          ./scripts/summary.py results/${{matrix.arch}}-threadsafe.csv
+      - name: results-migrate
         run: |
           mkdir -p results
           make clean
-          make code \
+          make lfs.csv \
             CFLAGS+=" \
               -DLFS_NO_ASSERT \
               -DLFS_NO_DEBUG \
               -DLFS_NO_WARN \
               -DLFS_NO_ERROR \
-              -DLFS_MIGRATE" \
-            CODEFLAGS+="-o results/code-${{matrix.arch}}-migrate.csv"
-      - name: results-code-error-asserts
+              -DLFS_MIGRATE"
+          cp lfs.csv results/${{matrix.arch}}-migrate.csv
+          ./scripts/summary.py results/${{matrix.arch}}-migrate.csv
+      - name: results-error-asserts
         run: |
           mkdir -p results
           make clean
-          make code \
+          make lfs.csv \
             CFLAGS+=" \
               -DLFS_NO_DEBUG \
               -DLFS_NO_WARN \
               -DLFS_NO_ERROR \
-              -D'LFS_ASSERT(test)=do {if(!(test)) {return -1;}} while(0)'" \
-            CODEFLAGS+="-o results/code-${{matrix.arch}}-error-asserts.csv"
+              -D'LFS_ASSERT(test)=do {if(!(test)) {return -1;}} while(0)'"
+          cp lfs.csv results/${{matrix.arch}}-error-asserts.csv
+          ./scripts/summary.py results/${{matrix.arch}}-error-asserts.csv
       - name: upload-results
         uses: actions/upload-artifact@v2
         with:
           name: results
           path: results
-      # limit reporting to Thumb, otherwise there would be too many numbers
-      # flying around for the results to be easily readable
+
+      # create statuses with results
       - name: collect-status
-        if: ${{matrix.arch == 'thumb'}}
         run: |
           mkdir -p status
-          for f in $(shopt -s nullglob ; echo results/code*.csv)
+          for f in $(shopt -s nullglob ; echo results/*.csv)
           do
-            export STEP="results-code$(
-              echo $f | sed -n 's/.*code-.*-\(.*\).csv/-\1/p')"
-            export CONTEXT="results / code$(
-              echo $f | sed -n 's/.*code-.*-\(.*\).csv/ (\1)/p')"
-            export PREV="$(curl -sS \
-              "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master" \
-              | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
-                | select(.context == env.CONTEXT).description
-                | capture("Code size is (?<result>[0-9]+)").result' \
-              || echo 0)"
-            export DESCRIPTION="$(./scripts/code.py -u $f -s | awk '
-              NR==2 {printf "Code size is %d B",$2}
-              NR==2 && ENVIRON["PREV"]+0 != 0 {
-                printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}')"
-            jq -n '{
-              state: "success",
-              context: env.CONTEXT,
-              description: env.DESCRIPTION,
-              target_job: "${{github.job}} (${{matrix.arch}})",
-              target_step: env.STEP}' \
-              | tee status/code$(
-                echo $f | sed -n 's/.*code-.*-\(.*\).csv/-\1/p').json
+            export STEP="results$(
+              echo $f | sed -n 's/[^-]*-\(.*\).csv/-\1/p')"
+            for r in code stack structs
+            do
+              export CONTEXT="results (${{matrix.arch}}$(
+                echo $f | sed -n 's/[^-]*-\(.*\).csv/, \1/p')) / $r"
+              export PREV="$(curl -sS \
+                "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master?per_page=100" \
+                | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
+                  | select(.context == env.CONTEXT).description
+                  | capture("(?<result>[0-9∞]+)").result' \
+                || echo 0)"
+              export DESCRIPTION="$(./scripts/summary.py $f -f $r -Y | awk '
+                NR==2 {printf "%s B",$2}
+                NR==2 && ENVIRON["PREV"]+0 != 0 {
+                  printf " (%+.1f%%)",100*($2-ENVIRON["PREV"])/ENVIRON["PREV"]}')"
+              jq -n '{
+                state: "success",
+                context: env.CONTEXT,
+                description: env.DESCRIPTION,
+                target_job: "${{github.job}} (${{matrix.arch}})",
+                target_step: env.STEP}' \
+                | tee status/$r-${{matrix.arch}}$(
+                  echo $f | sed -n 's/[^-]*-\(.*\).csv/-\1/p').json
+            done
           done
       - name: upload-status
-        if: ${{matrix.arch == 'thumb'}}
         uses: actions/upload-artifact@v2
         with:
           name: status
@@ -252,7 +274,7 @@ jobs:
 
   # run under Valgrind to check for memory errors
   valgrind:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: install
@@ -272,7 +294,7 @@ jobs:
 
   # self-host with littlefs-fuse for a fuzz-like test
   fuse:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     if: ${{!endsWith(github.ref, '-prefix')}}
     steps:
       - uses: actions/checkout@v2
@@ -297,16 +319,18 @@ jobs:
 
           # setup disk for littlefs-fuse
           mkdir mount
-          sudo chmod a+rw /dev/loop0
+          LOOP=$(sudo losetup -f)
+          sudo chmod a+rw $LOOP
           dd if=/dev/zero bs=512 count=128K of=disk
-          losetup /dev/loop0 disk
+          losetup $LOOP disk
+          echo "LOOP=$LOOP" >> $GITHUB_ENV
       - name: test
         run: |
           # self-host test
           make -C littlefs-fuse
 
-          littlefs-fuse/lfs --format /dev/loop0
-          littlefs-fuse/lfs /dev/loop0 mount
+          littlefs-fuse/lfs --format $LOOP
+          littlefs-fuse/lfs $LOOP mount
 
           ls mount
           mkdir mount/littlefs
@@ -318,7 +342,7 @@ jobs:
 
   # test migration using littlefs-fuse
   migrate:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     if: ${{!endsWith(github.ref, '-prefix')}}
     steps:
       - uses: actions/checkout@v2
@@ -348,9 +372,11 @@ jobs:
 
           # setup disk for littlefs-fuse
           mkdir mount
-          sudo chmod a+rw /dev/loop0
+          LOOP=$(sudo losetup -f)
+          sudo chmod a+rw $LOOP
           dd if=/dev/zero bs=512 count=128K of=disk
-          losetup /dev/loop0 disk
+          losetup $LOOP disk
+          echo "LOOP=$LOOP" >> $GITHUB_ENV
       - name: test
         run: |
           # compile v1 and v2
@@ -358,8 +384,8 @@ jobs:
           make -C v2
 
           # run self-host test with v1
-          v1/lfs --format /dev/loop0
-          v1/lfs /dev/loop0 mount
+          v1/lfs --format $LOOP
+          v1/lfs $LOOP mount
 
           ls mount
           mkdir mount/littlefs
@@ -373,8 +399,8 @@ jobs:
           cd ../..
           fusermount -u mount
 
-          v2/lfs --migrate /dev/loop0
-          v2/lfs /dev/loop0 mount
+          v2/lfs --migrate $LOOP
+          v2/lfs $LOOP mount
 
           # run self-host test with v2 right where we left off
           ls mount
@@ -385,7 +411,7 @@ jobs:
 
   # collect coverage info
   coverage:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     needs: [test]
     steps:
       - uses: actions/checkout@v2
@@ -421,14 +447,14 @@ jobs:
           export STEP="results-coverage"
           export CONTEXT="results / coverage"
           export PREV="$(curl -sS \
-            "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master" \
+            "$GITHUB_API_URL/repos/$GITHUB_REPOSITORY/status/master?per_page=100" \
             | jq -re 'select(.sha != env.GITHUB_SHA) | .statuses[]
               | select(.context == env.CONTEXT).description
-              | capture("Coverage is (?<result>[0-9\\.]+)").result' \
+              | capture("(?<result>[0-9\\.]+)").result' \
             || echo 0)"
           export DESCRIPTION="$(
-            ./scripts/coverage.py -u results/coverage.csv -s | awk -F '[ /%]+' '
-              NR==2 {printf "Coverage is %.1f%% of %d lines",$4,$3}
+            ./scripts/coverage.py -u results/coverage.csv -Y | awk -F '[ /%]+' '
+              NR==2 {printf "%.1f%% of %d lines",$4,$3}
               NR==2 && ENVIRON["PREV"]+0 != 0 {
                 printf " (%+.1f%%)",$4-ENVIRON["PREV"]}')"
           jq -n '{

.gitignore

@@ -2,6 +2,8 @@
 *.o
 *.d
 *.a
+*.ci
+*.csv
 
 # Testing things
 blocks/

LICENSE.md

@@ -1,3 +1,4 @@
+Copyright (c) 2022, The littlefs authors.  
 Copyright (c) 2017, Arm Limited. All rights reserved.
 
 Redistribution and use in source and binary forms, with or without modification,

Makefile

@@ -17,44 +17,63 @@ TARGET ?= $(BUILDDIR)lfs.a
 endif
 
 
-CC ?= gcc
-AR ?= ar
-SIZE ?= size
-CTAGS ?= ctags
-NM ?= nm
-LCOV ?= lcov
+CC      ?= gcc
+AR      ?= ar
+SIZE    ?= size
+CTAGS   ?= ctags
+NM      ?= nm
+OBJDUMP ?= objdump
+LCOV    ?= lcov
 
 SRC ?= $(wildcard *.c)
 OBJ := $(SRC:%.c=$(BUILDDIR)%.o)
 DEP := $(SRC:%.c=$(BUILDDIR)%.d)
 ASM := $(SRC:%.c=$(BUILDDIR)%.s)
+CGI := $(SRC:%.c=$(BUILDDIR)%.ci)
 
 ifdef DEBUG
-override CFLAGS += -O0 -g3
+override CFLAGS += -O0
 else
 override CFLAGS += -Os
 endif
 ifdef TRACE
 override CFLAGS += -DLFS_YES_TRACE
 endif
+override CFLAGS += -g3
 override CFLAGS += -I.
 override CFLAGS += -std=c99 -Wall -pedantic
 override CFLAGS += -Wextra -Wshadow -Wjump-misses-init -Wundef
 
 ifdef VERBOSE
-override TESTFLAGS += -v
-override CODEFLAGS += -v
+override TESTFLAGS     += -v
+override CALLSFLAGS    += -v
+override CODEFLAGS     += -v
+override DATAFLAGS     += -v
+override STACKFLAGS    += -v
+override STRUCTSFLAGS  += -v
 override COVERAGEFLAGS += -v
 endif
 ifdef EXEC
 override TESTFLAGS += --exec="$(EXEC)"
 endif
+ifdef COVERAGE
+override TESTFLAGS += --coverage
+endif
 ifdef BUILDDIR
-override TESTFLAGS += --build-dir="$(BUILDDIR:/=)"
-override CODEFLAGS += --build-dir="$(BUILDDIR:/=)"
+override TESTFLAGS     += --build-dir="$(BUILDDIR:/=)"
+override CALLSFLAGS    += --build-dir="$(BUILDDIR:/=)"
+override CODEFLAGS     += --build-dir="$(BUILDDIR:/=)"
+override DATAFLAGS     += --build-dir="$(BUILDDIR:/=)"
+override STACKFLAGS    += --build-dir="$(BUILDDIR:/=)"
+override STRUCTSFLAGS  += --build-dir="$(BUILDDIR:/=)"
+override COVERAGEFLAGS += --build-dir="$(BUILDDIR:/=)"
 endif
 ifneq ($(NM),nm)
 override CODEFLAGS += --nm-tool="$(NM)"
+override DATAFLAGS += --nm-tool="$(NM)"
+endif
+ifneq ($(OBJDUMP),objdump)
+override STRUCTSFLAGS += --objdump-tool="$(OBJDUMP)"
 endif
 
 
@@ -73,9 +92,9 @@ size: $(OBJ)
 tags:
 	$(CTAGS) --totals --c-types=+p $(shell find -H -name '*.h') $(SRC)
 
-.PHONY: code
-code: $(OBJ)
-	./scripts/code.py $^ $(CODEFLAGS)
+.PHONY: calls
+calls: $(CGI)
+	./scripts/calls.py $^ $(CALLSFLAGS)
 
 .PHONY: test
 test:
@@ -84,9 +103,30 @@ test:
 test%: tests/test$$(firstword $$(subst \#, ,%)).toml
 	./scripts/test.py $@ $(TESTFLAGS)
 
+.PHONY: code
+code: $(OBJ)
+	./scripts/code.py $^ -S $(CODEFLAGS)
+
+.PHONY: data
+data: $(OBJ)
+	./scripts/data.py $^ -S $(DATAFLAGS)
+
+.PHONY: stack
+stack: $(CGI)
+	./scripts/stack.py $^ -S $(STACKFLAGS)
+
+.PHONY: structs
+structs: $(OBJ)
+	./scripts/structs.py $^ -S $(STRUCTSFLAGS)
+
 .PHONY: coverage
 coverage:
-	./scripts/coverage.py $(BUILDDIR)tests/*.toml.info $(COVERAGEFLAGS)
+	./scripts/coverage.py $(BUILDDIR)tests/*.toml.info -s $(COVERAGEFLAGS)
+
+.PHONY: summary
+summary: $(BUILDDIR)lfs.csv
+	./scripts/summary.py -Y $^ $(SUMMARYFLAGS)
+
 
 # rules
 -include $(DEP)
@@ -95,20 +135,39 @@ coverage:
 $(BUILDDIR)lfs: $(OBJ)
 	$(CC) $(CFLAGS) $^ $(LFLAGS) -o $@
 
-$(BUILDDIR)%.a: $(OBJ)
+$(BUILDDIR)lfs.a: $(OBJ)
 	$(AR) rcs $@ $^
 
+$(BUILDDIR)lfs.csv: $(OBJ) $(CGI)
+	./scripts/code.py $(OBJ) -q $(CODEFLAGS) -o $@
+	./scripts/data.py $(OBJ) -q -m $@ $(DATAFLAGS) -o $@
+	./scripts/stack.py $(CGI) -q -m $@ $(STACKFLAGS) -o $@
+	./scripts/structs.py $(OBJ) -q -m $@ $(STRUCTSFLAGS) -o $@
+	$(if $(COVERAGE),\
+		./scripts/coverage.py $(BUILDDIR)tests/*.toml.info \
+			-q -m $@ $(COVERAGEFLAGS) -o $@)
+
 $(BUILDDIR)%.o: %.c
 	$(CC) -c -MMD $(CFLAGS) $< -o $@
 
 $(BUILDDIR)%.s: %.c
 	$(CC) -S $(CFLAGS) $< -o $@
 
+# gcc depends on the output file for intermediate file names, so
+# we can't omit to .o output. We also need to serialize with the
+# normal .o rule because otherwise we can end up with multiprocess
+# problems with two instances of gcc modifying the same .o
+$(BUILDDIR)%.ci: %.c | $(BUILDDIR)%.o
+	$(CC) -c -MMD -fcallgraph-info=su $(CFLAGS) $< -o $|
+
 # clean everything
 .PHONY: clean
 clean:
-	rm -f $(TARGET)
+	rm -f $(BUILDDIR)lfs
+	rm -f $(BUILDDIR)lfs.a
+	rm -f $(BUILDDIR)lfs.csv
 	rm -f $(OBJ)
+	rm -f $(CGI)
 	rm -f $(DEP)
 	rm -f $(ASM)
 	rm -f $(BUILDDIR)tests/*.toml.*

SPEC.md

@@ -233,19 +233,19 @@ Metadata tag fields:
    into a 3-bit abstract type and an 8-bit chunk field. Note that the value
    `0x000` is invalid and not assigned a type.
 
-3. **Type1 (3-bits)** - Abstract type of the tag. Groups the tags into
-   8 categories that facilitate bitmasked lookups.
+    1. **Type1 (3-bits)** - Abstract type of the tag. Groups the tags into
+       8 categories that facilitate bitmasked lookups.
 
-4. **Chunk (8-bits)** - Chunk field used for various purposes by the different
-   abstract types.  type1+chunk+id form a unique identifier for each tag in the
-   metadata block.
+    2. **Chunk (8-bits)** - Chunk field used for various purposes by the different
+       abstract types.  type1+chunk+id form a unique identifier for each tag in the
+       metadata block.
 
-5. **Id (10-bits)** - File id associated with the tag. Each file in a metadata
+3. **Id (10-bits)** - File id associated with the tag. Each file in a metadata
    block gets a unique id which is used to associate tags with that file. The
    special value `0x3ff` is used for any tags that are not associated with a
    file, such as directory and global metadata.
 
-6. **Length (10-bits)** - Length of the data in bytes. The special value
+4. **Length (10-bits)** - Length of the data in bytes. The special value
    `0x3ff` indicates that this tag has been deleted.
 
 ## Metadata types

bd/lfs_filebd.c

@@ -1,6 +1,7 @@
 /*
  * Block device emulated in a file
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -10,6 +11,10 @@
 #include <unistd.h>
 #include <errno.h>
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
         const struct lfs_filebd_config *bdcfg) {
     LFS_FILEBD_TRACE("lfs_filebd_createcfg(%p {.context=%p, "
@@ -27,7 +32,12 @@ int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
     bd->cfg = bdcfg;
 
     // open file
+    #ifdef _WIN32
+    bd->fd = open(path, O_RDWR | O_CREAT | O_BINARY, 0666);
+    #else
     bd->fd = open(path, O_RDWR | O_CREAT, 0666);
+    #endif
+
     if (bd->fd < 0) {
         int err = -errno;
         LFS_FILEBD_TRACE("lfs_filebd_createcfg -> %d", err);
@@ -80,7 +90,7 @@ int lfs_filebd_read(const struct lfs_config *cfg, lfs_block_t block,
     LFS_ASSERT(size % cfg->read_size == 0);
     LFS_ASSERT(block < cfg->block_count);
 
-    // zero for reproducability (in case file is truncated)
+    // zero for reproducibility (in case file is truncated)
     if (bd->cfg->erase_value != -1) {
         memset(buffer, bd->cfg->erase_value, size);
     }
@@ -193,7 +203,11 @@ int lfs_filebd_sync(const struct lfs_config *cfg) {
     LFS_FILEBD_TRACE("lfs_filebd_sync(%p)", (void*)cfg);
     // file sync
     lfs_filebd_t *bd = cfg->context;
+    #ifdef _WIN32
+    int err = FlushFileBuffers((HANDLE) _get_osfhandle(fd)) ? 0 : -1;
+    #else
     int err = fsync(bd->fd);
+    #endif
     if (err) {
         err = -errno;
         LFS_FILEBD_TRACE("lfs_filebd_sync -> %d", 0);

bd/lfs_filebd.h

@@ -1,6 +1,7 @@
 /*
  * Block device emulated in a file
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */

bd/lfs_rambd.c

@@ -1,6 +1,7 @@
 /*
  * Block device emulated in RAM
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -32,10 +33,12 @@ int lfs_rambd_createcfg(const struct lfs_config *cfg,
         }
     }
 
-    // zero for reproducability?
+    // zero for reproducibility?
     if (bd->cfg->erase_value != -1) {
         memset(bd->buffer, bd->cfg->erase_value,
                 cfg->block_size * cfg->block_count);
+    } else {
+        memset(bd->buffer, 0, cfg->block_size * cfg->block_count);
     }
 
     LFS_RAMBD_TRACE("lfs_rambd_createcfg -> %d", 0);

bd/lfs_rambd.h

@@ -1,6 +1,7 @@
 /*
  * Block device emulated in RAM
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */

bd/lfs_testbd.c

@@ -2,6 +2,7 @@
  * Testing block device, wraps filebd and rambd while providing a bunch
  * of hooks for testing littlefs in various conditions.
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */

bd/lfs_testbd.h

@@ -2,6 +2,7 @@
  * Testing block device, wraps filebd and rambd while providing a bunch
  * of hooks for testing littlefs in various conditions.
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */

lfs.h

@@ -1,6 +1,7 @@
 /*
  * The little filesystem
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -22,7 +23,7 @@ extern "C"
 // Software library version
 // Major (top-nibble), incremented on backwards incompatible changes
 // Minor (bottom-nibble), incremented on feature additions
-#define LFS_VERSION 0x00020004
+#define LFS_VERSION 0x00020005
 #define LFS_VERSION_MAJOR (0xffff & (LFS_VERSION >> 16))
 #define LFS_VERSION_MINOR (0xffff & (LFS_VERSION >>  0))
 
@@ -159,49 +160,49 @@ struct lfs_config {
     // information to the block device operations
     void *context;
 
-    // Read a region in a block. Negative error codes are propogated
+    // Read a region in a block. Negative error codes are propagated
     // to the user.
     int (*read)(const struct lfs_config *c, lfs_block_t block,
             lfs_off_t off, void *buffer, lfs_size_t size);
 
     // Program a region in a block. The block must have previously
-    // been erased. Negative error codes are propogated to the user.
+    // been erased. Negative error codes are propagated to the user.
     // May return LFS_ERR_CORRUPT if the block should be considered bad.
     int (*prog)(const struct lfs_config *c, lfs_block_t block,
             lfs_off_t off, const void *buffer, lfs_size_t size);
 
     // Erase a block. A block must be erased before being programmed.
     // The state of an erased block is undefined. Negative error codes
-    // are propogated to the user.
+    // are propagated to the user.
     // May return LFS_ERR_CORRUPT if the block should be considered bad.
     int (*erase)(const struct lfs_config *c, lfs_block_t block);
 
     // Sync the state of the underlying block device. Negative error codes
-    // are propogated to the user.
+    // are propagated to the user.
     int (*sync)(const struct lfs_config *c);
 
 #ifdef LFS_THREADSAFE
     // Lock the underlying block device. Negative error codes
-    // are propogated to the user.
+    // are propagated to the user.
     int (*lock)(const struct lfs_config *c);
 
     // Unlock the underlying block device. Negative error codes
-    // are propogated to the user.
+    // are propagated to the user.
     int (*unlock)(const struct lfs_config *c);
 #endif
 
-    // Minimum size of a block read. All read operations will be a
+    // Minimum size of a block read in bytes. All read operations will be a
     // multiple of this value.
     lfs_size_t read_size;
 
-    // Minimum size of a block program. All program operations will be a
-    // multiple of this value.
+    // Minimum size of a block program in bytes. All program operations will be
+    // a multiple of this value.
     lfs_size_t prog_size;
 
-    // Size of an erasable block. This does not impact ram consumption and
-    // may be larger than the physical erase size. However, non-inlined files
-    // take up at minimum one block. Must be a multiple of the read
-    // and program sizes.
+    // Size of an erasable block in bytes. This does not impact ram consumption
+    // and may be larger than the physical erase size. However, non-inlined
+    // files take up at minimum one block. Must be a multiple of the read and
+    // program sizes.
     lfs_size_t block_size;
 
     // Number of erasable blocks on the device.
@@ -215,11 +216,11 @@ struct lfs_config {
     // Set to -1 to disable block-level wear-leveling.
     int32_t block_cycles;
 
-    // Size of block caches. Each cache buffers a portion of a block in RAM.
-    // The littlefs needs a read cache, a program cache, and one additional
+    // Size of block caches in bytes. Each cache buffers a portion of a block in
+    // RAM. The littlefs needs a read cache, a program cache, and one additional
     // cache per file. Larger caches can improve performance by storing more
-    // data and reducing the number of disk accesses. Must be a multiple of
-    // the read and program sizes, and a factor of the block size.
+    // data and reducing the number of disk accesses. Must be a multiple of the
+    // read and program sizes, and a factor of the block size.
     lfs_size_t cache_size;
 
     // Size of the lookahead buffer in bytes. A larger lookahead buffer
@@ -485,7 +486,7 @@ int lfs_stat(lfs_t *lfs, const char *path, struct lfs_info *info);
 // Returns the size of the attribute, or a negative error code on failure.
 // Note, the returned size is the size of the attribute on disk, irrespective
 // of the size of the buffer. This can be used to dynamically allocate a buffer
-// or check for existance.
+// or check for existence.
 lfs_ssize_t lfs_getattr(lfs_t *lfs, const char *path,
         uint8_t type, void *buffer, lfs_size_t size);
 
@@ -513,6 +514,7 @@ int lfs_removeattr(lfs_t *lfs, const char *path, uint8_t type);
 
 /// File operations ///
 
+#ifndef LFS_NO_MALLOC
 // Open a file
 //
 // The mode that the file is opened in is determined by the flags, which
@@ -522,6 +524,10 @@ int lfs_removeattr(lfs_t *lfs, const char *path, uint8_t type);
 int lfs_file_open(lfs_t *lfs, lfs_file_t *file,
         const char *path, int flags);
 
+// if LFS_NO_MALLOC is defined, lfs_file_open() will fail with LFS_ERR_NOMEM
+// thus use lfs_file_opencfg() with config.buffer set.
+#endif
+
 // Open a file with extra configuration
 //
 // The mode that the file is opened in is determined by the flags, which

lfs_util.c

@@ -1,6 +1,7 @@
 /*
  * lfs util functions
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */

lfs_util.h

@@ -1,6 +1,7 @@
 /*
  * lfs utility functions
  *
+ * Copyright (c) 2022, The littlefs authors.
  * Copyright (c) 2017, Arm Limited. All rights reserved.
  * SPDX-License-Identifier: BSD-3-Clause
  */

scripts/code.py

@@ -15,7 +15,7 @@ import csv
 import collections as co
 
 
-OBJ_PATHS = ['*.o', 'bd/*.o']
+OBJ_PATHS = ['*.o']
 
 def collect(paths, **args):
     results = co.defaultdict(lambda: 0)
@@ -31,7 +31,8 @@ def collect(paths, **args):
         proc = sp.Popen(cmd,
             stdout=sp.PIPE,
             stderr=sp.PIPE if not args.get('verbose') else None,
-            universal_newlines=True)
+            universal_newlines=True,
+            errors='replace')
         for line in proc.stdout:
             m = pattern.match(line)
             if m:
@@ -48,16 +49,30 @@ def collect(paths, **args):
         # map to source files
         if args.get('build_dir'):
             file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
+        # replace .o with .c, different scripts report .o/.c, we need to
+        # choose one if we want to deduplicate csv files
+        file = re.sub('\.o$', '.c', file)
         # discard internal functions
-        if func.startswith('__'):
-            continue
+        if not args.get('everything'):
+            if func.startswith('__'):
+                continue
         # discard .8449 suffixes created by optimizer
         func = re.sub('\.[0-9]+', '', func)
+
         flat_results.append((file, func, size))
 
     return flat_results
 
 def main(**args):
+    def openio(path, mode='r'):
+        if path == '-':
+            if 'r' in mode:
+                return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
+            else:
+                return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
+        else:
+            return open(path, mode)
+
     # find sizes
     if not args.get('use', None):
         # find .o files
@@ -75,13 +90,14 @@ def main(**args):
 
         results = collect(paths, **args)
     else:
-        with open(args['use']) as f:
+        with openio(args['use']) as f:
             r = csv.DictReader(f)
             results = [
                 (   result['file'],
-                    result['function'],
-                    int(result['size']))
-                for result in r]
+                    result['name'],
+                    int(result['code_size']))
+                for result in r
+                if result.get('code_size') not in {None, ''}]
 
     total = 0
     for _, _, size in results:
@@ -89,13 +105,17 @@ def main(**args):
 
     # find previous results?
     if args.get('diff'):
-        with open(args['diff']) as f:
-            r = csv.DictReader(f)
-            prev_results = [
-                (   result['file'],
-                    result['function'],
-                    int(result['size']))
-                for result in r]
+        try:
+            with openio(args['diff']) as f:
+                r = csv.DictReader(f)
+                prev_results = [
+                    (   result['file'],
+                        result['name'],
+                        int(result['code_size']))
+                    for result in r
+                    if result.get('code_size') not in {None, ''}]
+        except FileNotFoundError:
+            prev_results = []
 
         prev_total = 0
         for _, _, size in prev_results:
@@ -103,14 +123,34 @@ def main(**args):
 
     # write results to CSV
     if args.get('output'):
-        with open(args['output'], 'w') as f:
-            w = csv.writer(f)
-            w.writerow(['file', 'function', 'size'])
-            for file, func, size in sorted(results):
-                w.writerow((file, func, size))
+        merged_results = co.defaultdict(lambda: {})
+        other_fields = []
+
+        # merge?
+        if args.get('merge'):
+            try:
+                with openio(args['merge']) as f:
+                    r = csv.DictReader(f)
+                    for result in r:
+                        file = result.pop('file', '')
+                        func = result.pop('name', '')
+                        result.pop('code_size', None)
+                        merged_results[(file, func)] = result
+                        other_fields = result.keys()
+            except FileNotFoundError:
+                pass
+
+        for file, func, size in results:
+            merged_results[(file, func)]['code_size'] = size
+
+        with openio(args['output'], 'w') as f:
+            w = csv.DictWriter(f, ['file', 'name', *other_fields, 'code_size'])
+            w.writeheader()
+            for (file, func), result in sorted(merged_results.items()):
+                w.writerow({'file': file, 'name': func, **result})
 
     # print results
-    def dedup_entries(results, by='function'):
+    def dedup_entries(results, by='name'):
         entries = co.defaultdict(lambda: 0)
         for file, func, size in results:
             entry = (file if by == 'file' else func)
@@ -126,45 +166,67 @@ def main(**args):
             diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
         return diff
 
+    def sorted_entries(entries):
+        if args.get('size_sort'):
+            return sorted(entries, key=lambda x: (-x[1], x))
+        elif args.get('reverse_size_sort'):
+            return sorted(entries, key=lambda x: (+x[1], x))
+        else:
+            return sorted(entries)
+
+    def sorted_diff_entries(entries):
+        if args.get('size_sort'):
+            return sorted(entries, key=lambda x: (-x[1][1], x))
+        elif args.get('reverse_size_sort'):
+            return sorted(entries, key=lambda x: (+x[1][1], x))
+        else:
+            return sorted(entries, key=lambda x: (-x[1][3], x))
+
     def print_header(by=''):
         if not args.get('diff'):
             print('%-36s %7s' % (by, 'size'))
         else:
             print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
 
-    def print_entries(by='function'):
+    def print_entry(name, size):
+        print("%-36s %7d" % (name, size))
+
+    def print_diff_entry(name, old, new, diff, ratio):
+        print("%-36s %7s %7s %+7d%s" % (name,
+            old or "-",
+            new or "-",
+            diff,
+            ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    def print_entries(by='name'):
         entries = dedup_entries(results, by=by)
 
         if not args.get('diff'):
             print_header(by=by)
-            for name, size in sorted(entries.items()):
-                print("%-36s %7d" % (name, size))
+            for name, size in sorted_entries(entries.items()):
+                print_entry(name, size)
         else:
             prev_entries = dedup_entries(prev_results, by=by)
             diff = diff_entries(prev_entries, entries)
             print_header(by='%s (%d added, %d removed)' % (by,
                 sum(1 for old, _, _, _ in diff.values() if not old),
                 sum(1 for _, new, _, _ in diff.values() if not new)))
-            for name, (old, new, diff, ratio) in sorted(diff.items(),
-                    key=lambda x: (-x[1][3], x)):
+            for name, (old, new, diff, ratio) in sorted_diff_entries(
+                    diff.items()):
                 if ratio or args.get('all'):
-                    print("%-36s %7s %7s %+7d%s" % (name,
-                        old or "-",
-                        new or "-",
-                        diff,
-                        ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+                    print_diff_entry(name, old, new, diff, ratio)
 
     def print_totals():
         if not args.get('diff'):
-            print("%-36s %7d" % ('TOTAL', total))
+            print_entry('TOTAL', total)
         else:
-            ratio = (total-prev_total)/prev_total if prev_total else 1.0
-            print("%-36s %7s %7s %+7d%s" % (
-                'TOTAL',
-                prev_total if prev_total else '-',
-                total if total else '-',
+            ratio = (0.0 if not prev_total and not total
+                else 1.0 if not prev_total
+                else (total-prev_total)/prev_total)
+            print_diff_entry('TOTAL',
+                prev_total, total,
                 total-prev_total,
-                ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+                ratio)
 
     if args.get('quiet'):
         pass
@@ -175,7 +237,7 @@ def main(**args):
         print_entries(by='file')
         print_totals()
     else:
-        print_entries(by='function')
+        print_entries(by='name')
         print_totals()
 
 if __name__ == "__main__":
@@ -188,22 +250,30 @@ if __name__ == "__main__":
             or a list of paths. Defaults to %r." % OBJ_PATHS)
     parser.add_argument('-v', '--verbose', action='store_true',
         help="Output commands that run behind the scenes.")
+    parser.add_argument('-q', '--quiet', action='store_true',
+        help="Don't show anything, useful with -o.")
     parser.add_argument('-o', '--output',
         help="Specify CSV file to store results.")
     parser.add_argument('-u', '--use',
         help="Don't compile and find code sizes, instead use this CSV file.")
     parser.add_argument('-d', '--diff',
         help="Specify CSV file to diff code size against.")
+    parser.add_argument('-m', '--merge',
+        help="Merge with an existing CSV file when writing to output.")
     parser.add_argument('-a', '--all', action='store_true',
         help="Show all functions, not just the ones that changed.")
-    parser.add_argument('--files', action='store_true',
+    parser.add_argument('-A', '--everything', action='store_true',
+        help="Include builtin and libc specific symbols.")
+    parser.add_argument('-s', '--size-sort', action='store_true',
+        help="Sort by size.")
+    parser.add_argument('-S', '--reverse-size-sort', action='store_true',
+        help="Sort by size, but backwards.")
+    parser.add_argument('-F', '--files', action='store_true',
         help="Show file-level code sizes. Note this does not include padding! "
             "So sizes may differ from other tools.")
-    parser.add_argument('-s', '--summary', action='store_true',
+    parser.add_argument('-Y', '--summary', action='store_true',
         help="Only show the total code size.")
-    parser.add_argument('-q', '--quiet', action='store_true',
-        help="Don't show anything, useful with -o.")
-    parser.add_argument('--type', default='tTrRdDbB',
+    parser.add_argument('--type', default='tTrRdD',
         help="Type of symbols to report, this uses the same single-character "
             "type-names emitted by nm. Defaults to %(default)r.")
     parser.add_argument('--nm-tool', default=['nm'], type=lambda x: x.split(),

scripts/coverage.py

@@ -55,8 +55,9 @@ def collect(paths, **args):
     for (file, func), (hits, count) in reduced_funcs.items():
         # discard internal/testing functions (test_* injected with
         # internal testing)
-        if func.startswith('__') or func.startswith('test_'):
-            continue
+        if not args.get('everything'):
+            if func.startswith('__') or func.startswith('test_'):
+                continue
         # discard .8449 suffixes created by optimizer
         func = re.sub('\.[0-9]+', '', func)
         results.append((file, func, hits, count))
@@ -65,6 +66,15 @@ def collect(paths, **args):
 
 
 def main(**args):
+    def openio(path, mode='r'):
+        if path == '-':
+            if 'r' in mode:
+                return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
+            else:
+                return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
+        else:
+            return open(path, mode)
+
     # find coverage
     if not args.get('use'):
         # find *.info files
@@ -82,14 +92,16 @@ def main(**args):
 
         results = collect(paths, **args)
     else:
-        with open(args['use']) as f:
+        with openio(args['use']) as f:
             r = csv.DictReader(f)
             results = [
                 (   result['file'],
-                    result['function'],
-                    int(result['hits']),
-                    int(result['count']))
-                for result in r]
+                    result['name'],
+                    int(result['coverage_hits']),
+                    int(result['coverage_count']))
+                for result in r
+                if result.get('coverage_hits') not in {None, ''}
+                if result.get('coverage_count') not in {None, ''}]
 
     total_hits, total_count = 0, 0
     for _, _, hits, count in results:
@@ -98,14 +110,19 @@ def main(**args):
 
     # find previous results?
     if args.get('diff'):
-        with open(args['diff']) as f:
-            r = csv.DictReader(f)
-            prev_results = [
-                (   result['file'],
-                    result['function'],
-                    int(result['hits']),
-                    int(result['count']))
-                for result in r]
+        try:
+            with openio(args['diff']) as f:
+                r = csv.DictReader(f)
+                prev_results = [
+                    (   result['file'],
+                        result['name'],
+                        int(result['coverage_hits']),
+                        int(result['coverage_count']))
+                    for result in r
+                    if result.get('coverage_hits') not in {None, ''}
+                    if result.get('coverage_count') not in {None, ''}]
+        except FileNotFoundError:
+            prev_results = []
 
         prev_total_hits, prev_total_count = 0, 0
         for _, _, hits, count in prev_results:
@@ -114,14 +131,36 @@ def main(**args):
 
     # write results to CSV
     if args.get('output'):
-        with open(args['output'], 'w') as f:
-            w = csv.writer(f)
-            w.writerow(['file', 'function', 'hits', 'count'])
-            for file, func, hits, count in sorted(results):
-                w.writerow((file, func, hits, count))
+        merged_results = co.defaultdict(lambda: {})
+        other_fields = []
+
+        # merge?
+        if args.get('merge'):
+            try:
+                with openio(args['merge']) as f:
+                    r = csv.DictReader(f)
+                    for result in r:
+                        file = result.pop('file', '')
+                        func = result.pop('name', '')
+                        result.pop('coverage_hits', None)
+                        result.pop('coverage_count', None)
+                        merged_results[(file, func)] = result
+                        other_fields = result.keys()
+            except FileNotFoundError:
+                pass
+
+        for file, func, hits, count in results:
+            merged_results[(file, func)]['coverage_hits'] = hits
+            merged_results[(file, func)]['coverage_count'] = count
+
+        with openio(args['output'], 'w') as f:
+            w = csv.DictWriter(f, ['file', 'name', *other_fields, 'coverage_hits', 'coverage_count'])
+            w.writeheader()
+            for (file, func), result in sorted(merged_results.items()):
+                w.writerow({'file': file, 'name': func, **result})
 
     # print results
-    def dedup_entries(results, by='function'):
+    def dedup_entries(results, by='name'):
         entries = co.defaultdict(lambda: (0, 0))
         for file, func, hits, count in results:
             entry = (file if by == 'file' else func)
@@ -147,23 +186,59 @@ def main(**args):
                     - (old_hits/old_count if old_count else 1.0)))
         return diff
 
+    def sorted_entries(entries):
+        if args.get('coverage_sort'):
+            return sorted(entries, key=lambda x: (-(x[1][0]/x[1][1] if x[1][1] else -1), x))
+        elif args.get('reverse_coverage_sort'):
+            return sorted(entries, key=lambda x: (+(x[1][0]/x[1][1] if x[1][1] else -1), x))
+        else:
+            return sorted(entries)
+
+    def sorted_diff_entries(entries):
+        if args.get('coverage_sort'):
+            return sorted(entries, key=lambda x: (-(x[1][2]/x[1][3] if x[1][3] else -1), x))
+        elif args.get('reverse_coverage_sort'):
+            return sorted(entries, key=lambda x: (+(x[1][2]/x[1][3] if x[1][3] else -1), x))
+        else:
+            return sorted(entries, key=lambda x: (-x[1][6], x))
+
     def print_header(by=''):
         if not args.get('diff'):
             print('%-36s %19s' % (by, 'hits/line'))
         else:
             print('%-36s %19s %19s %11s' % (by, 'old', 'new', 'diff'))
 
-    def print_entries(by='function'):
+    def print_entry(name, hits, count):
+        print("%-36s %11s %7s" % (name,
+            '%d/%d' % (hits, count)
+                if count else '-',
+            '%.1f%%' % (100*hits/count)
+                if count else '-'))
+
+    def print_diff_entry(name,
+            old_hits, old_count,
+            new_hits, new_count,
+            diff_hits, diff_count,
+            ratio):
+        print("%-36s %11s %7s %11s %7s %11s%s" % (name,
+            '%d/%d' % (old_hits, old_count)
+                if old_count else '-',
+            '%.1f%%' % (100*old_hits/old_count)
+                if old_count else '-',
+            '%d/%d' % (new_hits, new_count)
+                if new_count else '-',
+            '%.1f%%' % (100*new_hits/new_count)
+                if new_count else '-',
+            '%+d/%+d' % (diff_hits, diff_count),
+            ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    def print_entries(by='name'):
         entries = dedup_entries(results, by=by)
 
         if not args.get('diff'):
             print_header(by=by)
-            for name, (hits, count) in sorted(entries.items()):
-                print("%-36s %11s %7s" % (name,
-                    '%d/%d' % (hits, count)
-                        if count else '-',
-                    '%.1f%%' % (100*hits/count)
-                        if count else '-'))
+            for name, (hits, count) in sorted_entries(entries.items()):
+                print_entry(name, hits, count)
         else:
             prev_entries = dedup_entries(prev_results, by=by)
             diff = diff_entries(prev_entries, entries)
@@ -173,45 +248,28 @@ def main(**args):
             for name, (
                     old_hits, old_count,
                     new_hits, new_count,
-                    diff_hits, diff_count, ratio) in sorted(diff.items(),
-                        key=lambda x: (-x[1][6], x)):
+                    diff_hits, diff_count, ratio) in sorted_diff_entries(
+                        diff.items()):
                 if ratio or args.get('all'):
-                    print("%-36s %11s %7s %11s %7s %11s%s" % (name,
-                        '%d/%d' % (old_hits, old_count)
-                            if old_count else '-',
-                        '%.1f%%' % (100*old_hits/old_count)
-                            if old_count else '-',
-                        '%d/%d' % (new_hits, new_count)
-                            if new_count else '-',
-                        '%.1f%%' % (100*new_hits/new_count)
-                            if new_count else '-',
-                        '%+d/%+d' % (diff_hits, diff_count),
-                        ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+                    print_diff_entry(name,
+                        old_hits, old_count,
+                        new_hits, new_count,
+                        diff_hits, diff_count,
+                        ratio)
 
     def print_totals():
         if not args.get('diff'):
-            print("%-36s %11s %7s" % ('TOTAL',
-                '%d/%d' % (total_hits, total_count)
-                    if total_count else '-',
-                '%.1f%%' % (100*total_hits/total_count)
-                    if total_count else '-'))
+            print_entry('TOTAL', total_hits, total_count)
         else:
             ratio = ((total_hits/total_count
                     if total_count else 1.0)
                 - (prev_total_hits/prev_total_count
                     if prev_total_count else 1.0))
-            print("%-36s %11s %7s %11s %7s %11s%s" % ('TOTAL',
-                '%d/%d' % (prev_total_hits, prev_total_count)
-                    if prev_total_count else '-',
-                '%.1f%%' % (100*prev_total_hits/prev_total_count)
-                    if prev_total_count else '-',
-                '%d/%d' % (total_hits, total_count)
-                    if total_count else '-',
-                '%.1f%%' % (100*total_hits/total_count)
-                    if total_count else '-',
-                '%+d/%+d' % (total_hits-prev_total_hits,
-                    total_count-prev_total_count),
-                ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+            print_diff_entry('TOTAL',
+                prev_total_hits, prev_total_count,
+                total_hits, total_count,
+                total_hits-prev_total_hits, total_count-prev_total_count,
+                ratio)
 
     if args.get('quiet'):
         pass
@@ -222,7 +280,7 @@ def main(**args):
         print_entries(by='file')
         print_totals()
     else:
-        print_entries(by='function')
+        print_entries(by='name')
         print_totals()
 
 if __name__ == "__main__":
@@ -243,12 +301,23 @@ if __name__ == "__main__":
         help="Don't do any work, instead use this CSV file.")
     parser.add_argument('-d', '--diff',
         help="Specify CSV file to diff code size against.")
+    parser.add_argument('-m', '--merge',
+        help="Merge with an existing CSV file when writing to output.")
     parser.add_argument('-a', '--all', action='store_true',
         help="Show all functions, not just the ones that changed.")
-    parser.add_argument('--files', action='store_true',
+    parser.add_argument('-A', '--everything', action='store_true',
+        help="Include builtin and libc specific symbols.")
+    parser.add_argument('-s', '--coverage-sort', action='store_true',
+        help="Sort by coverage.")
+    parser.add_argument('-S', '--reverse-coverage-sort', action='store_true',
+        help="Sort by coverage, but backwards.")
+    parser.add_argument('-F', '--files', action='store_true',
         help="Show file-level coverage.")
-    parser.add_argument('-s', '--summary', action='store_true',
+    parser.add_argument('-Y', '--summary', action='store_true',
         help="Only show the total coverage.")
     parser.add_argument('-q', '--quiet', action='store_true',
         help="Don't show anything, useful with -o.")
+    parser.add_argument('--build-dir',
+        help="Specify the relative build directory. Used to map object files \
+            to the correct source files.")
     sys.exit(main(**vars(parser.parse_args())))

scripts/data.py

@@ -0,0 +1,283 @@
+#!/usr/bin/env python3
+#
+# Script to find data size at the function level. Basically just a bit wrapper
+# around nm with some extra conveniences for comparing builds. Heavily inspired
+# by Linux's Bloat-O-Meter.
+#
+
+import os
+import glob
+import itertools as it
+import subprocess as sp
+import shlex
+import re
+import csv
+import collections as co
+
+
+OBJ_PATHS = ['*.o']
+
+def collect(paths, **args):
+    results = co.defaultdict(lambda: 0)
+    pattern = re.compile(
+        '^(?P<size>[0-9a-fA-F]+)' +
+        ' (?P<type>[%s])' % re.escape(args['type']) +
+        ' (?P<func>.+?)$')
+    for path in paths:
+        # note nm-tool may contain extra args
+        cmd = args['nm_tool'] + ['--size-sort', path]
+        if args.get('verbose'):
+            print(' '.join(shlex.quote(c) for c in cmd))
+        proc = sp.Popen(cmd,
+            stdout=sp.PIPE,
+            stderr=sp.PIPE if not args.get('verbose') else None,
+            universal_newlines=True,
+            errors='replace')
+        for line in proc.stdout:
+            m = pattern.match(line)
+            if m:
+                results[(path, m.group('func'))] += int(m.group('size'), 16)
+        proc.wait()
+        if proc.returncode != 0:
+            if not args.get('verbose'):
+                for line in proc.stderr:
+                    sys.stdout.write(line)
+            sys.exit(-1)
+
+    flat_results = []
+    for (file, func), size in results.items():
+        # map to source files
+        if args.get('build_dir'):
+            file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
+        # replace .o with .c, different scripts report .o/.c, we need to
+        # choose one if we want to deduplicate csv files
+        file = re.sub('\.o$', '.c', file)
+        # discard internal functions
+        if not args.get('everything'):
+            if func.startswith('__'):
+                continue
+        # discard .8449 suffixes created by optimizer
+        func = re.sub('\.[0-9]+', '', func)
+        flat_results.append((file, func, size))
+
+    return flat_results
+
+def main(**args):
+    def openio(path, mode='r'):
+        if path == '-':
+            if 'r' in mode:
+                return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
+            else:
+                return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
+        else:
+            return open(path, mode)
+
+    # find sizes
+    if not args.get('use', None):
+        # find .o files
+        paths = []
+        for path in args['obj_paths']:
+            if os.path.isdir(path):
+                path = path + '/*.o'
+
+            for path in glob.glob(path):
+                paths.append(path)
+
+        if not paths:
+            print('no .obj files found in %r?' % args['obj_paths'])
+            sys.exit(-1)
+
+        results = collect(paths, **args)
+    else:
+        with openio(args['use']) as f:
+            r = csv.DictReader(f)
+            results = [
+                (   result['file'],
+                    result['name'],
+                    int(result['data_size']))
+                for result in r
+                if result.get('data_size') not in {None, ''}]
+
+    total = 0
+    for _, _, size in results:
+        total += size
+
+    # find previous results?
+    if args.get('diff'):
+        try:
+            with openio(args['diff']) as f:
+                r = csv.DictReader(f)
+                prev_results = [
+                    (   result['file'],
+                        result['name'],
+                        int(result['data_size']))
+                    for result in r
+                    if result.get('data_size') not in {None, ''}]
+        except FileNotFoundError:
+            prev_results = []
+
+        prev_total = 0
+        for _, _, size in prev_results:
+            prev_total += size
+
+    # write results to CSV
+    if args.get('output'):
+        merged_results = co.defaultdict(lambda: {})
+        other_fields = []
+
+        # merge?
+        if args.get('merge'):
+            try:
+                with openio(args['merge']) as f:
+                    r = csv.DictReader(f)
+                    for result in r:
+                        file = result.pop('file', '')
+                        func = result.pop('name', '')
+                        result.pop('data_size', None)
+                        merged_results[(file, func)] = result
+                        other_fields = result.keys()
+            except FileNotFoundError:
+                pass
+
+        for file, func, size in results:
+            merged_results[(file, func)]['data_size'] = size
+
+        with openio(args['output'], 'w') as f:
+            w = csv.DictWriter(f, ['file', 'name', *other_fields, 'data_size'])
+            w.writeheader()
+            for (file, func), result in sorted(merged_results.items()):
+                w.writerow({'file': file, 'name': func, **result})
+
+    # print results
+    def dedup_entries(results, by='name'):
+        entries = co.defaultdict(lambda: 0)
+        for file, func, size in results:
+            entry = (file if by == 'file' else func)
+            entries[entry] += size
+        return entries
+
+    def diff_entries(olds, news):
+        diff = co.defaultdict(lambda: (0, 0, 0, 0))
+        for name, new in news.items():
+            diff[name] = (0, new, new, 1.0)
+        for name, old in olds.items():
+            _, new, _, _ = diff[name]
+            diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
+        return diff
+
+    def sorted_entries(entries):
+        if args.get('size_sort'):
+            return sorted(entries, key=lambda x: (-x[1], x))
+        elif args.get('reverse_size_sort'):
+            return sorted(entries, key=lambda x: (+x[1], x))
+        else:
+            return sorted(entries)
+
+    def sorted_diff_entries(entries):
+        if args.get('size_sort'):
+            return sorted(entries, key=lambda x: (-x[1][1], x))
+        elif args.get('reverse_size_sort'):
+            return sorted(entries, key=lambda x: (+x[1][1], x))
+        else:
+            return sorted(entries, key=lambda x: (-x[1][3], x))
+
+    def print_header(by=''):
+        if not args.get('diff'):
+            print('%-36s %7s' % (by, 'size'))
+        else:
+            print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
+
+    def print_entry(name, size):
+        print("%-36s %7d" % (name, size))
+
+    def print_diff_entry(name, old, new, diff, ratio):
+        print("%-36s %7s %7s %+7d%s" % (name,
+            old or "-",
+            new or "-",
+            diff,
+            ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    def print_entries(by='name'):
+        entries = dedup_entries(results, by=by)
+
+        if not args.get('diff'):
+            print_header(by=by)
+            for name, size in sorted_entries(entries.items()):
+                print_entry(name, size)
+        else:
+            prev_entries = dedup_entries(prev_results, by=by)
+            diff = diff_entries(prev_entries, entries)
+            print_header(by='%s (%d added, %d removed)' % (by,
+                sum(1 for old, _, _, _ in diff.values() if not old),
+                sum(1 for _, new, _, _ in diff.values() if not new)))
+            for name, (old, new, diff, ratio) in sorted_diff_entries(
+                    diff.items()):
+                if ratio or args.get('all'):
+                    print_diff_entry(name, old, new, diff, ratio)
+
+    def print_totals():
+        if not args.get('diff'):
+            print_entry('TOTAL', total)
+        else:
+            ratio = (0.0 if not prev_total and not total
+                else 1.0 if not prev_total
+                else (total-prev_total)/prev_total)
+            print_diff_entry('TOTAL',
+                prev_total, total,
+                total-prev_total,
+                ratio)
+
+    if args.get('quiet'):
+        pass
+    elif args.get('summary'):
+        print_header()
+        print_totals()
+    elif args.get('files'):
+        print_entries(by='file')
+        print_totals()
+    else:
+        print_entries(by='name')
+        print_totals()
+
+if __name__ == "__main__":
+    import argparse
+    import sys
+    parser = argparse.ArgumentParser(
+        description="Find data size at the function level.")
+    parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
+        help="Description of where to find *.o files. May be a directory \
+            or a list of paths. Defaults to %r." % OBJ_PATHS)
+    parser.add_argument('-v', '--verbose', action='store_true',
+        help="Output commands that run behind the scenes.")
+    parser.add_argument('-q', '--quiet', action='store_true',
+        help="Don't show anything, useful with -o.")
+    parser.add_argument('-o', '--output',
+        help="Specify CSV file to store results.")
+    parser.add_argument('-u', '--use',
+        help="Don't compile and find data sizes, instead use this CSV file.")
+    parser.add_argument('-d', '--diff',
+        help="Specify CSV file to diff data size against.")
+    parser.add_argument('-m', '--merge',
+        help="Merge with an existing CSV file when writing to output.")
+    parser.add_argument('-a', '--all', action='store_true',
+        help="Show all functions, not just the ones that changed.")
+    parser.add_argument('-A', '--everything', action='store_true',
+        help="Include builtin and libc specific symbols.")
+    parser.add_argument('-s', '--size-sort', action='store_true',
+        help="Sort by size.")
+    parser.add_argument('-S', '--reverse-size-sort', action='store_true',
+        help="Sort by size, but backwards.")
+    parser.add_argument('-F', '--files', action='store_true',
+        help="Show file-level data sizes. Note this does not include padding! "
+            "So sizes may differ from other tools.")
+    parser.add_argument('-Y', '--summary', action='store_true',
+        help="Only show the total data size.")
+    parser.add_argument('--type', default='dDbB',
+        help="Type of symbols to report, this uses the same single-character "
+            "type-names emitted by nm. Defaults to %(default)r.")
+    parser.add_argument('--nm-tool', default=['nm'], type=lambda x: x.split(),
+        help="Path to the nm tool to use.")
+    parser.add_argument('--build-dir',
+        help="Specify the relative build directory. Used to map object files \
+            to the correct source files.")
+    sys.exit(main(**vars(parser.parse_args())))

scripts/stack.py

@@ -0,0 +1,430 @@
+#!/usr/bin/env python3
+#
+# Script to find stack usage at the function level. Will detect recursion and
+# report as infinite stack usage.
+#
+
+import os
+import glob
+import itertools as it
+import re
+import csv
+import collections as co
+import math as m
+
+
+CI_PATHS = ['*.ci']
+
+def collect(paths, **args):
+    # parse the vcg format
+    k_pattern = re.compile('([a-z]+)\s*:', re.DOTALL)
+    v_pattern = re.compile('(?:"(.*?)"|([a-z]+))', re.DOTALL)
+    def parse_vcg(rest):
+        def parse_vcg(rest):
+            node = []
+            while True:
+                rest = rest.lstrip()
+                m = k_pattern.match(rest)
+                if not m:
+                    return (node, rest)
+                k, rest = m.group(1), rest[m.end(0):]
+
+                rest = rest.lstrip()
+                if rest.startswith('{'):
+                    v, rest = parse_vcg(rest[1:])
+                    assert rest[0] == '}', "unexpected %r" % rest[0:1]
+                    rest = rest[1:]
+                    node.append((k, v))
+                else:
+                    m = v_pattern.match(rest)
+                    assert m, "unexpected %r" % rest[0:1]
+                    v, rest = m.group(1) or m.group(2), rest[m.end(0):]
+                    node.append((k, v))
+
+        node, rest = parse_vcg(rest)
+        assert rest == '', "unexpected %r" % rest[0:1]
+        return node
+
+    # collect into functions
+    results = co.defaultdict(lambda: (None, None, 0, set()))
+    f_pattern = re.compile(
+        r'([^\\]*)\\n([^:]*)[^\\]*\\n([0-9]+) bytes \((.*)\)')
+    for path in paths:
+        with open(path) as f:
+            vcg = parse_vcg(f.read())
+        for k, graph in vcg:
+            if k != 'graph':
+                continue
+            for k, info in graph:
+                if k == 'node':
+                    info = dict(info)
+                    m = f_pattern.match(info['label'])
+                    if m:
+                        function, file, size, type = m.groups()
+                        if not args.get('quiet') and type != 'static':
+                            print('warning: found non-static stack for %s (%s)'
+                                % (function, type))
+                        _, _, _, targets = results[info['title']]
+                        results[info['title']] = (
+                            file, function, int(size), targets)
+                elif k == 'edge':
+                    info = dict(info)
+                    _, _, _, targets = results[info['sourcename']]
+                    targets.add(info['targetname'])
+                else:
+                    continue
+
+    if not args.get('everything'):
+        for source, (s_file, s_function, _, _) in list(results.items()):
+            # discard internal functions
+            if s_file.startswith('<') or s_file.startswith('/usr/include'):
+                del results[source]
+
+    # find maximum stack size recursively, this requires also detecting cycles
+    # (in case of recursion)
+    def find_limit(source, seen=None):
+        seen = seen or set()
+        if source not in results:
+            return 0
+        _, _, frame, targets = results[source]
+
+        limit = 0
+        for target in targets:
+            if target in seen:
+                # found a cycle
+                return float('inf')
+            limit_ = find_limit(target, seen | {target})
+            limit = max(limit, limit_)
+
+        return frame + limit
+
+    def find_deps(targets):
+        deps = set()
+        for target in targets:
+            if target in results:
+                t_file, t_function, _, _ = results[target]
+                deps.add((t_file, t_function))
+        return deps
+
+    # flatten into a list
+    flat_results = []
+    for source, (s_file, s_function, frame, targets) in results.items():
+        limit = find_limit(source)
+        deps = find_deps(targets)
+        flat_results.append((s_file, s_function, frame, limit, deps))
+
+    return flat_results
+
+def main(**args):
+    def openio(path, mode='r'):
+        if path == '-':
+            if 'r' in mode:
+                return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
+            else:
+                return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
+        else:
+            return open(path, mode)
+
+    # find sizes
+    if not args.get('use', None):
+        # find .ci files
+        paths = []
+        for path in args['ci_paths']:
+            if os.path.isdir(path):
+                path = path + '/*.ci'
+
+            for path in glob.glob(path):
+                paths.append(path)
+
+        if not paths:
+            print('no .ci files found in %r?' % args['ci_paths'])
+            sys.exit(-1)
+
+        results = collect(paths, **args)
+    else:
+        with openio(args['use']) as f:
+            r = csv.DictReader(f)
+            results = [
+                (   result['file'],
+                    result['name'],
+                    int(result['stack_frame']),
+                    float(result['stack_limit']), # note limit can be inf
+                    set())
+                for result in r
+                if result.get('stack_frame') not in {None, ''}
+                if result.get('stack_limit') not in {None, ''}]
+
+    total_frame = 0
+    total_limit = 0
+    for _, _, frame, limit, _ in results:
+        total_frame += frame
+        total_limit = max(total_limit, limit)
+
+    # find previous results?
+    if args.get('diff'):
+        try:
+            with openio(args['diff']) as f:
+                r = csv.DictReader(f)
+                prev_results = [
+                    (   result['file'],
+                        result['name'],
+                        int(result['stack_frame']),
+                        float(result['stack_limit']),
+                        set())
+                    for result in r
+                    if result.get('stack_frame') not in {None, ''}
+                    if result.get('stack_limit') not in {None, ''}]
+        except FileNotFoundError:
+            prev_results = []
+
+        prev_total_frame = 0
+        prev_total_limit = 0
+        for _, _, frame, limit, _ in prev_results:
+            prev_total_frame += frame
+            prev_total_limit = max(prev_total_limit, limit)
+
+    # write results to CSV
+    if args.get('output'):
+        merged_results = co.defaultdict(lambda: {})
+        other_fields = []
+
+        # merge?
+        if args.get('merge'):
+            try:
+                with openio(args['merge']) as f:
+                    r = csv.DictReader(f)
+                    for result in r:
+                        file = result.pop('file', '')
+                        func = result.pop('name', '')
+                        result.pop('stack_frame', None)
+                        result.pop('stack_limit', None)
+                        merged_results[(file, func)] = result
+                        other_fields = result.keys()
+            except FileNotFoundError:
+                pass
+
+        for file, func, frame, limit, _ in results:
+            merged_results[(file, func)]['stack_frame'] = frame
+            merged_results[(file, func)]['stack_limit'] = limit
+
+        with openio(args['output'], 'w') as f:
+            w = csv.DictWriter(f, ['file', 'name', *other_fields, 'stack_frame', 'stack_limit'])
+            w.writeheader()
+            for (file, func), result in sorted(merged_results.items()):
+                w.writerow({'file': file, 'name': func, **result})
+
+    # print results
+    def dedup_entries(results, by='name'):
+        entries = co.defaultdict(lambda: (0, 0, set()))
+        for file, func, frame, limit, deps in results:
+            entry = (file if by == 'file' else func)
+            entry_frame, entry_limit, entry_deps = entries[entry]
+            entries[entry] = (
+                entry_frame + frame,
+                max(entry_limit, limit),
+                entry_deps | {file if by == 'file' else func
+                    for file, func in deps})
+        return entries
+
+    def diff_entries(olds, news):
+        diff = co.defaultdict(lambda: (None, None, None, None, 0, 0, 0, set()))
+        for name, (new_frame, new_limit, deps) in news.items():
+            diff[name] = (
+                None, None,
+                new_frame, new_limit,
+                new_frame, new_limit,
+                1.0,
+                deps)
+        for name, (old_frame, old_limit, _) in olds.items():
+            _, _, new_frame, new_limit, _, _, _, deps = diff[name]
+            diff[name] = (
+                old_frame, old_limit,
+                new_frame, new_limit,
+                (new_frame or 0) - (old_frame or 0),
+                0 if m.isinf(new_limit or 0) and m.isinf(old_limit or 0)
+                    else (new_limit or 0) - (old_limit or 0),
+                0.0 if m.isinf(new_limit or 0) and m.isinf(old_limit or 0)
+                    else +float('inf') if m.isinf(new_limit or 0)
+                    else -float('inf') if m.isinf(old_limit or 0)
+                    else +0.0 if not old_limit and not new_limit
+                    else +1.0 if not old_limit
+                    else ((new_limit or 0) - (old_limit or 0))/(old_limit or 0),
+                deps)
+        return diff
+
+    def sorted_entries(entries):
+        if args.get('limit_sort'):
+            return sorted(entries, key=lambda x: (-x[1][1], x))
+        elif args.get('reverse_limit_sort'):
+            return sorted(entries, key=lambda x: (+x[1][1], x))
+        elif args.get('frame_sort'):
+            return sorted(entries, key=lambda x: (-x[1][0], x))
+        elif args.get('reverse_frame_sort'):
+            return sorted(entries, key=lambda x: (+x[1][0], x))
+        else:
+            return sorted(entries)
+
+    def sorted_diff_entries(entries):
+        if args.get('limit_sort'):
+            return sorted(entries, key=lambda x: (-(x[1][3] or 0), x))
+        elif args.get('reverse_limit_sort'):
+            return sorted(entries, key=lambda x: (+(x[1][3] or 0), x))
+        elif args.get('frame_sort'):
+            return sorted(entries, key=lambda x: (-(x[1][2] or 0), x))
+        elif args.get('reverse_frame_sort'):
+            return sorted(entries, key=lambda x: (+(x[1][2] or 0), x))
+        else:
+            return sorted(entries, key=lambda x: (-x[1][6], x))
+
+    def print_header(by=''):
+        if not args.get('diff'):
+            print('%-36s %7s %7s' % (by, 'frame', 'limit'))
+        else:
+            print('%-36s %15s %15s %15s' % (by, 'old', 'new', 'diff'))
+
+    def print_entry(name, frame, limit):
+        print("%-36s %7d %7s" % (name,
+            frame, '∞' if m.isinf(limit) else int(limit)))
+
+    def print_diff_entry(name,
+            old_frame, old_limit,
+            new_frame, new_limit,
+            diff_frame, diff_limit,
+            ratio):
+        print('%-36s %7s %7s %7s %7s %+7d %7s%s' % (name,
+            old_frame if old_frame is not None else "-",
+            ('∞' if m.isinf(old_limit) else int(old_limit))
+                if old_limit is not None else "-",
+            new_frame if new_frame is not None else "-",
+            ('∞' if m.isinf(new_limit) else int(new_limit))
+                if new_limit is not None else "-",
+            diff_frame,
+            ('+∞' if diff_limit > 0 and m.isinf(diff_limit)
+                else '-∞' if diff_limit < 0 and m.isinf(diff_limit)
+                else '%+d' % diff_limit),
+            '' if not ratio
+                else ' (+∞%)' if ratio > 0 and m.isinf(ratio)
+                else ' (-∞%)' if ratio < 0 and m.isinf(ratio)
+                else ' (%+.1f%%)' % (100*ratio)))
+
+    def print_entries(by='name'):
+        # build optional tree of dependencies
+        def print_deps(entries, depth, print,
+                filter=lambda _: True,
+                prefixes=('', '', '', '')):
+            entries = entries if isinstance(entries, list) else list(entries)
+            filtered_entries = [(name, entry)
+                for name, entry in entries
+                if filter(name)]
+            for i, (name, entry) in enumerate(filtered_entries):
+                last = (i == len(filtered_entries)-1)
+                print(prefixes[0+last] + name, entry)
+
+                if depth > 0:
+                    deps = entry[-1]
+                    print_deps(entries, depth-1, print,
+                        lambda name: name in deps,
+                        (   prefixes[2+last] + "|-> ",
+                            prefixes[2+last] + "'-> ",
+                            prefixes[2+last] + "|   ",
+                            prefixes[2+last] + "    "))
+
+        entries = dedup_entries(results, by=by)
+
+        if not args.get('diff'):
+            print_header(by=by)
+            print_deps(
+                sorted_entries(entries.items()),
+                args.get('depth') or 0,
+                lambda name, entry: print_entry(name, *entry[:-1]))
+        else:
+            prev_entries = dedup_entries(prev_results, by=by)
+            diff = diff_entries(prev_entries, entries)
+
+            print_header(by='%s (%d added, %d removed)' % (by,
+                sum(1 for _, old, _, _, _, _, _, _ in diff.values() if old is None),
+                sum(1 for _, _, _, new, _, _, _, _ in diff.values() if new is None)))
+            print_deps(
+                filter(
+                    lambda x: x[1][6] or args.get('all'),
+                    sorted_diff_entries(diff.items())),
+                args.get('depth') or 0,
+                lambda name, entry: print_diff_entry(name, *entry[:-1]))
+
+    def print_totals():
+        if not args.get('diff'):
+            print_entry('TOTAL', total_frame, total_limit)
+        else:
+            diff_frame = total_frame - prev_total_frame
+            diff_limit = (
+                0 if m.isinf(total_limit or 0) and m.isinf(prev_total_limit or 0)
+                    else (total_limit or 0) - (prev_total_limit or 0))
+            ratio = (
+                0.0 if m.isinf(total_limit or 0) and m.isinf(prev_total_limit or 0)
+                    else +float('inf') if m.isinf(total_limit or 0)
+                    else -float('inf') if m.isinf(prev_total_limit or 0)
+                    else 0.0 if not prev_total_limit and not total_limit
+                    else 1.0 if not prev_total_limit
+                    else ((total_limit or 0) - (prev_total_limit or 0))/(prev_total_limit or 0))
+            print_diff_entry('TOTAL',
+                prev_total_frame, prev_total_limit,
+                total_frame, total_limit,
+                diff_frame, diff_limit,
+                ratio)
+
+    if args.get('quiet'):
+        pass
+    elif args.get('summary'):
+        print_header()
+        print_totals()
+    elif args.get('files'):
+        print_entries(by='file')
+        print_totals()
+    else:
+        print_entries(by='name')
+        print_totals()
+
+
+if __name__ == "__main__":
+    import argparse
+    import sys
+    parser = argparse.ArgumentParser(
+        description="Find stack usage at the function level.")
+    parser.add_argument('ci_paths', nargs='*', default=CI_PATHS,
+        help="Description of where to find *.ci files. May be a directory \
+            or a list of paths. Defaults to %r." % CI_PATHS)
+    parser.add_argument('-v', '--verbose', action='store_true',
+        help="Output commands that run behind the scenes.")
+    parser.add_argument('-q', '--quiet', action='store_true',
+        help="Don't show anything, useful with -o.")
+    parser.add_argument('-o', '--output',
+        help="Specify CSV file to store results.")
+    parser.add_argument('-u', '--use',
+        help="Don't parse callgraph files, instead use this CSV file.")
+    parser.add_argument('-d', '--diff',
+        help="Specify CSV file to diff against.")
+    parser.add_argument('-m', '--merge',
+        help="Merge with an existing CSV file when writing to output.")
+    parser.add_argument('-a', '--all', action='store_true',
+        help="Show all functions, not just the ones that changed.")
+    parser.add_argument('-A', '--everything', action='store_true',
+        help="Include builtin and libc specific symbols.")
+    parser.add_argument('-s', '--limit-sort', action='store_true',
+        help="Sort by stack limit.")
+    parser.add_argument('-S', '--reverse-limit-sort', action='store_true',
+        help="Sort by stack limit, but backwards.")
+    parser.add_argument('--frame-sort', action='store_true',
+        help="Sort by stack frame size.")
+    parser.add_argument('--reverse-frame-sort', action='store_true',
+        help="Sort by stack frame size, but backwards.")
+    parser.add_argument('-L', '--depth', default=0, type=lambda x: int(x, 0),
+        nargs='?', const=float('inf'),
+        help="Depth of dependencies to show.")
+    parser.add_argument('-F', '--files', action='store_true',
+        help="Show file-level calls.")
+    parser.add_argument('-Y', '--summary', action='store_true',
+        help="Only show the total stack size.")
+    parser.add_argument('--build-dir',
+        help="Specify the relative build directory. Used to map object files \
+            to the correct source files.")
+    sys.exit(main(**vars(parser.parse_args())))

scripts/structs.py

@@ -0,0 +1,331 @@
+#!/usr/bin/env python3
+#
+# Script to find struct sizes.
+#
+
+import os
+import glob
+import itertools as it
+import subprocess as sp
+import shlex
+import re
+import csv
+import collections as co
+
+
+OBJ_PATHS = ['*.o']
+
+def collect(paths, **args):
+    decl_pattern = re.compile(
+        '^\s+(?P<no>[0-9]+)'
+            '\s+(?P<dir>[0-9]+)'
+            '\s+.*'
+            '\s+(?P<file>[^\s]+)$')
+    struct_pattern = re.compile(
+        '^(?:.*DW_TAG_(?P<tag>[a-z_]+).*'
+            '|^.*DW_AT_name.*:\s*(?P<name>[^:\s]+)\s*'
+            '|^.*DW_AT_decl_file.*:\s*(?P<decl>[0-9]+)\s*'
+            '|^.*DW_AT_byte_size.*:\s*(?P<size>[0-9]+)\s*)$')
+
+    results = co.defaultdict(lambda: 0)
+    for path in paths:
+        # find decl, we want to filter by structs in .h files
+        decls = {}
+        # note objdump-tool may contain extra args
+        cmd = args['objdump_tool'] + ['--dwarf=rawline', path]
+        if args.get('verbose'):
+            print(' '.join(shlex.quote(c) for c in cmd))
+        proc = sp.Popen(cmd,
+            stdout=sp.PIPE,
+            stderr=sp.PIPE if not args.get('verbose') else None,
+            universal_newlines=True,
+            errors='replace')
+        for line in proc.stdout:
+            # find file numbers
+            m = decl_pattern.match(line)
+            if m:
+                decls[int(m.group('no'))] = m.group('file')
+        proc.wait()
+        if proc.returncode != 0:
+            if not args.get('verbose'):
+                for line in proc.stderr:
+                    sys.stdout.write(line)
+            sys.exit(-1)
+
+        # collect structs as we parse dwarf info
+        found = False
+        name = None
+        decl = None
+        size = None
+
+        # note objdump-tool may contain extra args
+        cmd = args['objdump_tool'] + ['--dwarf=info', path]
+        if args.get('verbose'):
+            print(' '.join(shlex.quote(c) for c in cmd))
+        proc = sp.Popen(cmd,
+            stdout=sp.PIPE,
+            stderr=sp.PIPE if not args.get('verbose') else None,
+            universal_newlines=True,
+            errors='replace')
+        for line in proc.stdout:
+            # state machine here to find structs
+            m = struct_pattern.match(line)
+            if m:
+                if m.group('tag'):
+                    if (name is not None
+                            and decl is not None
+                            and size is not None):
+                        decl = decls.get(decl, '?')
+                        results[(decl, name)] = size
+                    found = (m.group('tag') == 'structure_type')
+                    name = None
+                    decl = None
+                    size = None
+                elif found and m.group('name'):
+                    name = m.group('name')
+                elif found and name and m.group('decl'):
+                    decl = int(m.group('decl'))
+                elif found and name and m.group('size'):
+                    size = int(m.group('size'))
+        proc.wait()
+        if proc.returncode != 0:
+            if not args.get('verbose'):
+                for line in proc.stderr:
+                    sys.stdout.write(line)
+            sys.exit(-1)
+
+    flat_results = []
+    for (file, struct), size in results.items():
+        # map to source files
+        if args.get('build_dir'):
+            file = re.sub('%s/*' % re.escape(args['build_dir']), '', file)
+        # only include structs declared in header files in the current
+        # directory, ignore internal-only # structs (these are represented
+        # in other measurements)
+        if not args.get('everything'):
+            if not file.endswith('.h'):
+                continue
+        # replace .o with .c, different scripts report .o/.c, we need to
+        # choose one if we want to deduplicate csv files
+        file = re.sub('\.o$', '.c', file)
+
+        flat_results.append((file, struct, size))
+
+    return flat_results
+
+
+def main(**args):
+    def openio(path, mode='r'):
+        if path == '-':
+            if 'r' in mode:
+                return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
+            else:
+                return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
+        else:
+            return open(path, mode)
+
+    # find sizes
+    if not args.get('use', None):
+        # find .o files
+        paths = []
+        for path in args['obj_paths']:
+            if os.path.isdir(path):
+                path = path + '/*.o'
+
+            for path in glob.glob(path):
+                paths.append(path)
+
+        if not paths:
+            print('no .obj files found in %r?' % args['obj_paths'])
+            sys.exit(-1)
+
+        results = collect(paths, **args)
+    else:
+        with openio(args['use']) as f:
+            r = csv.DictReader(f)
+            results = [
+                (   result['file'],
+                    result['name'],
+                    int(result['struct_size']))
+                for result in r
+                if result.get('struct_size') not in {None, ''}]
+
+    total = 0
+    for _, _, size in results:
+        total += size
+
+    # find previous results?
+    if args.get('diff'):
+        try:
+            with openio(args['diff']) as f:
+                r = csv.DictReader(f)
+                prev_results = [
+                    (   result['file'],
+                        result['name'],
+                        int(result['struct_size']))
+                    for result in r
+                    if result.get('struct_size') not in {None, ''}]
+        except FileNotFoundError:
+            prev_results = []
+
+        prev_total = 0
+        for _, _, size in prev_results:
+            prev_total += size
+
+    # write results to CSV
+    if args.get('output'):
+        merged_results = co.defaultdict(lambda: {})
+        other_fields = []
+
+        # merge?
+        if args.get('merge'):
+            try:
+                with openio(args['merge']) as f:
+                    r = csv.DictReader(f)
+                    for result in r:
+                        file = result.pop('file', '')
+                        struct = result.pop('name', '')
+                        result.pop('struct_size', None)
+                        merged_results[(file, struct)] = result
+                        other_fields = result.keys()
+            except FileNotFoundError:
+                pass
+
+        for file, struct, size in results:
+            merged_results[(file, struct)]['struct_size'] = size
+
+        with openio(args['output'], 'w') as f:
+            w = csv.DictWriter(f, ['file', 'name', *other_fields, 'struct_size'])
+            w.writeheader()
+            for (file, struct), result in sorted(merged_results.items()):
+                w.writerow({'file': file, 'name': struct, **result})
+
+    # print results
+    def dedup_entries(results, by='name'):
+        entries = co.defaultdict(lambda: 0)
+        for file, struct, size in results:
+            entry = (file if by == 'file' else struct)
+            entries[entry] += size
+        return entries
+
+    def diff_entries(olds, news):
+        diff = co.defaultdict(lambda: (0, 0, 0, 0))
+        for name, new in news.items():
+            diff[name] = (0, new, new, 1.0)
+        for name, old in olds.items():
+            _, new, _, _ = diff[name]
+            diff[name] = (old, new, new-old, (new-old)/old if old else 1.0)
+        return diff
+
+    def sorted_entries(entries):
+        if args.get('size_sort'):
+            return sorted(entries, key=lambda x: (-x[1], x))
+        elif args.get('reverse_size_sort'):
+            return sorted(entries, key=lambda x: (+x[1], x))
+        else:
+            return sorted(entries)
+
+    def sorted_diff_entries(entries):
+        if args.get('size_sort'):
+            return sorted(entries, key=lambda x: (-x[1][1], x))
+        elif args.get('reverse_size_sort'):
+            return sorted(entries, key=lambda x: (+x[1][1], x))
+        else:
+            return sorted(entries, key=lambda x: (-x[1][3], x))
+
+    def print_header(by=''):
+        if not args.get('diff'):
+            print('%-36s %7s' % (by, 'size'))
+        else:
+            print('%-36s %7s %7s %7s' % (by, 'old', 'new', 'diff'))
+
+    def print_entry(name, size):
+        print("%-36s %7d" % (name, size))
+
+    def print_diff_entry(name, old, new, diff, ratio):
+        print("%-36s %7s %7s %+7d%s" % (name,
+            old or "-",
+            new or "-",
+            diff,
+            ' (%+.1f%%)' % (100*ratio) if ratio else ''))
+
+    def print_entries(by='name'):
+        entries = dedup_entries(results, by=by)
+
+        if not args.get('diff'):
+            print_header(by=by)
+            for name, size in sorted_entries(entries.items()):
+                print_entry(name, size)
+        else:
+            prev_entries = dedup_entries(prev_results, by=by)
+            diff = diff_entries(prev_entries, entries)
+            print_header(by='%s (%d added, %d removed)' % (by,
+                sum(1 for old, _, _, _ in diff.values() if not old),
+                sum(1 for _, new, _, _ in diff.values() if not new)))
+            for name, (old, new, diff, ratio) in sorted_diff_entries(
+                    diff.items()):
+                if ratio or args.get('all'):
+                    print_diff_entry(name, old, new, diff, ratio)
+
+    def print_totals():
+        if not args.get('diff'):
+            print_entry('TOTAL', total)
+        else:
+            ratio = (0.0 if not prev_total and not total
+                else 1.0 if not prev_total
+                else (total-prev_total)/prev_total)
+            print_diff_entry('TOTAL',
+                prev_total, total,
+                total-prev_total,
+                ratio)
+
+    if args.get('quiet'):
+        pass
+    elif args.get('summary'):
+        print_header()
+        print_totals()
+    elif args.get('files'):
+        print_entries(by='file')
+        print_totals()
+    else:
+        print_entries(by='name')
+        print_totals()
+
+if __name__ == "__main__":
+    import argparse
+    import sys
+    parser = argparse.ArgumentParser(
+        description="Find struct sizes.")
+    parser.add_argument('obj_paths', nargs='*', default=OBJ_PATHS,
+        help="Description of where to find *.o files. May be a directory \
+            or a list of paths. Defaults to %r." % OBJ_PATHS)
+    parser.add_argument('-v', '--verbose', action='store_true',
+        help="Output commands that run behind the scenes.")
+    parser.add_argument('-q', '--quiet', action='store_true',
+        help="Don't show anything, useful with -o.")
+    parser.add_argument('-o', '--output',
+        help="Specify CSV file to store results.")
+    parser.add_argument('-u', '--use',
+        help="Don't compile and find struct sizes, instead use this CSV file.")
+    parser.add_argument('-d', '--diff',
+        help="Specify CSV file to diff struct size against.")
+    parser.add_argument('-m', '--merge',
+        help="Merge with an existing CSV file when writing to output.")
+    parser.add_argument('-a', '--all', action='store_true',
+        help="Show all functions, not just the ones that changed.")
+    parser.add_argument('-A', '--everything', action='store_true',
+        help="Include builtin and libc specific symbols.")
+    parser.add_argument('-s', '--size-sort', action='store_true',
+        help="Sort by size.")
+    parser.add_argument('-S', '--reverse-size-sort', action='store_true',
+        help="Sort by size, but backwards.")
+    parser.add_argument('-F', '--files', action='store_true',
+        help="Show file-level struct sizes.")
+    parser.add_argument('-Y', '--summary', action='store_true',
+        help="Only show the total struct size.")
+    parser.add_argument('--objdump-tool', default=['objdump'], type=lambda x: x.split(),
+        help="Path to the objdump tool to use.")
+    parser.add_argument('--build-dir',
+        help="Specify the relative build directory. Used to map object files \
+            to the correct source files.")
+    sys.exit(main(**vars(parser.parse_args())))

scripts/summary.py

@@ -0,0 +1,279 @@
+#!/usr/bin/env python3
+#
+# Script to summarize the outputs of other scripts. Operates on CSV files.
+#
+
+import functools as ft
+import collections as co
+import os
+import csv
+import re
+import math as m
+
+# displayable fields
+Field = co.namedtuple('Field', 'name,parse,acc,key,fmt,repr,null,ratio')
+FIELDS = [
+    # name, parse, accumulate, fmt, print, null
+    Field('code',
+        lambda r: int(r['code_size']),
+        sum,
+        lambda r: r,
+        '%7s',
+        lambda r: r,
+        '-',
+        lambda old, new: (new-old)/old),
+    Field('data',
+        lambda r: int(r['data_size']),
+        sum,
+        lambda r: r,
+        '%7s',
+        lambda r: r,
+        '-',
+        lambda old, new: (new-old)/old),
+    Field('stack',
+        lambda r: float(r['stack_limit']),
+        max,
+        lambda r: r,
+        '%7s',
+        lambda r: '∞' if m.isinf(r) else int(r),
+        '-',
+        lambda old, new: (new-old)/old),
+    Field('structs',
+        lambda r: int(r['struct_size']),
+        sum,
+        lambda r: r,
+        '%8s',
+        lambda r: r,
+        '-',
+        lambda old, new: (new-old)/old),
+    Field('coverage',
+        lambda r: (int(r['coverage_hits']), int(r['coverage_count'])),
+        lambda rs: ft.reduce(lambda a, b: (a[0]+b[0], a[1]+b[1]), rs),
+        lambda r: r[0]/r[1],
+        '%19s',
+        lambda r: '%11s %7s' % ('%d/%d' % (r[0], r[1]), '%.1f%%' % (100*r[0]/r[1])),
+        '%11s %7s' % ('-', '-'),
+        lambda old, new: ((new[0]/new[1]) - (old[0]/old[1])))
+]
+
+
+def main(**args):
+    def openio(path, mode='r'):
+        if path == '-':
+            if 'r' in mode:
+                return os.fdopen(os.dup(sys.stdin.fileno()), 'r')
+            else:
+                return os.fdopen(os.dup(sys.stdout.fileno()), 'w')
+        else:
+            return open(path, mode)
+
+    # find results
+    results = co.defaultdict(lambda: {})
+    for path in args.get('csv_paths', '-'):
+        try:
+            with openio(path) as f:
+                r = csv.DictReader(f)
+                for result in r:
+                    file = result.pop('file', '')
+                    name = result.pop('name', '')
+                    prev = results[(file, name)]
+                    for field in FIELDS:
+                        try:
+                            r = field.parse(result)
+                            if field.name in prev:
+                                results[(file, name)][field.name] = field.acc(
+                                    [prev[field.name], r])
+                            else:
+                                results[(file, name)][field.name] = r
+                        except (KeyError, ValueError):
+                            pass
+        except FileNotFoundError:
+            pass
+
+    # find fields
+    if args.get('all_fields'):
+        fields = FIELDS
+    elif args.get('fields') is not None:
+        fields_dict = {field.name: field for field in FIELDS}
+        fields = [fields_dict[f] for f in args['fields']]
+    else:
+        fields = []
+        for field in FIELDS:
+            if any(field.name in result for result in results.values()):
+                fields.append(field)
+
+    # find total for every field
+    total = {}
+    for result in results.values():
+        for field in fields:
+            if field.name in result and field.name in total:
+                total[field.name] = field.acc(
+                    [total[field.name], result[field.name]])
+            elif field.name in result:
+                total[field.name] = result[field.name]
+
+    # find previous results?
+    if args.get('diff'):
+        prev_results = co.defaultdict(lambda: {})
+        try:
+            with openio(args['diff']) as f:
+                r = csv.DictReader(f)
+                for result in r:
+                    file = result.pop('file', '')
+                    name = result.pop('name', '')
+                    prev = prev_results[(file, name)]
+                    for field in FIELDS:
+                        try:
+                            r = field.parse(result)
+                            if field.name in prev:
+                                prev_results[(file, name)][field.name] = field.acc(
+                                    [prev[field.name], r])
+                            else:
+                                prev_results[(file, name)][field.name] = r
+                        except (KeyError, ValueError):
+                            pass
+        except FileNotFoundError:
+            pass
+
+        prev_total = {}
+        for result in prev_results.values():
+            for field in fields:
+                if field.name in result and field.name in prev_total:
+                    prev_total[field.name] = field.acc(
+                        [prev_total[field.name], result[field.name]])
+                elif field.name in result:
+                    prev_total[field.name] = result[field.name]
+
+    # print results
+    def dedup_entries(results, by='name'):
+        entries = co.defaultdict(lambda: {})
+        for (file, func), result in results.items():
+            entry = (file if by == 'file' else func)
+            prev = entries[entry]
+            for field in fields:
+                if field.name in result and field.name in prev:
+                    entries[entry][field.name] = field.acc(
+                        [prev[field.name], result[field.name]])
+                elif field.name in result:
+                    entries[entry][field.name] = result[field.name]
+        return entries
+
+    def sorted_entries(entries):
+        if args.get('sort') is not None:
+            field = {field.name: field for field in FIELDS}[args['sort']]
+            return sorted(entries, key=lambda x: (
+                -(field.key(x[1][field.name])) if field.name in x[1] else -1, x))
+        elif args.get('reverse_sort') is not None:
+            field = {field.name: field for field in FIELDS}[args['reverse_sort']]
+            return sorted(entries, key=lambda x: (
+                +(field.key(x[1][field.name])) if field.name in x[1] else -1, x))
+        else:
+            return sorted(entries)
+
+    def print_header(by=''):
+        if not args.get('diff'):
+            print('%-36s' % by, end='')
+            for field in fields:
+                print((' '+field.fmt) % field.name, end='')
+            print()
+        else:
+            print('%-36s' % by, end='')
+            for field in fields:
+                print((' '+field.fmt) % field.name, end='')
+                print(' %-9s' % '', end='')
+            print()
+
+    def print_entry(name, result):
+        print('%-36s' % name, end='')
+        for field in fields:
+            r = result.get(field.name)
+            if r is not None:
+                print((' '+field.fmt) % field.repr(r), end='')
+            else:
+                print((' '+field.fmt) % '-', end='')
+        print()
+
+    def print_diff_entry(name, old, new):
+        print('%-36s' % name, end='')
+        for field in fields:
+            n = new.get(field.name)
+            if n is not None:
+                print((' '+field.fmt) % field.repr(n), end='')
+            else:
+                print((' '+field.fmt) % '-', end='')
+            o = old.get(field.name)
+            ratio = (
+                0.0 if m.isinf(o or 0) and m.isinf(n or 0)
+                    else +float('inf') if m.isinf(n or 0)
+                    else -float('inf') if m.isinf(o or 0)
+                    else 0.0 if not o and not n
+                    else +1.0 if not o
+                    else -1.0 if not n
+                    else field.ratio(o, n))
+            print(' %-9s' % (
+                '' if not ratio
+                    else '(+∞%)' if ratio > 0 and m.isinf(ratio)
+                    else '(-∞%)' if ratio < 0 and m.isinf(ratio)
+                    else '(%+.1f%%)' % (100*ratio)), end='')
+        print()
+
+    def print_entries(by='name'):
+        entries = dedup_entries(results, by=by)
+
+        if not args.get('diff'):
+            print_header(by=by)
+            for name, result in sorted_entries(entries.items()):
+                print_entry(name, result)
+        else:
+            prev_entries = dedup_entries(prev_results, by=by)
+            print_header(by='%s (%d added, %d removed)' % (by,
+                sum(1 for name in entries if name not in prev_entries),
+                sum(1 for name in prev_entries if name not in entries)))
+            for name, result in sorted_entries(entries.items()):
+                if args.get('all') or result != prev_entries.get(name, {}):
+                    print_diff_entry(name, prev_entries.get(name, {}), result)
+
+    def print_totals():
+        if not args.get('diff'):
+            print_entry('TOTAL', total)
+        else:
+            print_diff_entry('TOTAL', prev_total, total)
+
+    if args.get('summary'):
+        print_header()
+        print_totals()
+    elif args.get('files'):
+        print_entries(by='file')
+        print_totals()
+    else:
+        print_entries(by='name')
+        print_totals()
+
+
+if __name__ == "__main__":
+    import argparse
+    import sys
+    parser = argparse.ArgumentParser(
+        description="Summarize measurements")
+    parser.add_argument('csv_paths', nargs='*', default='-',
+        help="Description of where to find *.csv files. May be a directory \
+            or list of paths. *.csv files will be merged to show the total \
+            coverage.")
+    parser.add_argument('-d', '--diff',
+        help="Specify CSV file to diff against.")
+    parser.add_argument('-a', '--all', action='store_true',
+        help="Show all objects, not just the ones that changed.")
+    parser.add_argument('-e', '--all-fields', action='store_true',
+        help="Show all fields, even those with no results.")
+    parser.add_argument('-f', '--fields', type=lambda x: re.split('\s*,\s*', x),
+        help="Comma separated list of fields to print, by default all fields \
+            that are found in the CSV files are printed.")
+    parser.add_argument('-s', '--sort',
+        help="Sort by this field.")
+    parser.add_argument('-S', '--reverse-sort',
+        help="Sort by this field, but backwards.")
+    parser.add_argument('-F', '--files', action='store_true',
+        help="Show file-level calls.")
+    parser.add_argument('-Y', '--summary', action='store_true',
+        help="Only show the totals.")
+    sys.exit(main(**vars(parser.parse_args())))

scripts/test.py

@@ -565,7 +565,7 @@ class TestSuite:
                     path=self.path))
                 mk.write('\n')
 
-            # add truely global defines globally
+            # add truly global defines globally
             for k, v in sorted(self.defines.items()):
                 mk.write('%s.test: override CFLAGS += -D%s=%r\n'
                     % (self.path, k, v))
@@ -656,7 +656,7 @@ def main(**args):
         for path in glob.glob(testpath):
             suites.append(TestSuite(path, classes, defines, filter, **args))
 
-    # sort for reproducability
+    # sort for reproducibility
     suites = sorted(suites)
 
     # generate permutations
@@ -784,10 +784,13 @@ def main(**args):
             stdout=sp.PIPE if not args.get('verbose') else None,
             stderr=sp.STDOUT if not args.get('verbose') else None,
             universal_newlines=True)
+        stdout = []
+        for line in proc.stdout:
+            stdout.append(line)
         proc.wait()
         if proc.returncode != 0:
             if not args.get('verbose'):
-                for line in proc.stdout:
+                for line in stdout:
                     sys.stdout.write(line)
             sys.exit(-1)
 
@@ -803,9 +806,9 @@ def main(**args):
             failure.case.test(failure=failure, **args)
             sys.exit(0)
 
-    print('tests passed %d/%d (%.2f%%)' % (passed, total,
+    print('tests passed %d/%d (%.1f%%)' % (passed, total,
         100*(passed/total if total else 1.0)))
-    print('tests failed %d/%d (%.2f%%)' % (failed, total,
+    print('tests failed %d/%d (%.1f%%)' % (failed, total,
         100*(failed/total if total else 1.0)))
     return 1 if failed > 0 else 0