arturbac / logcat_symbolizer

Tool for collecting asan and ubsan sainitizer routput from android logcat and transforming results to html with source code annotation with llvm-symbolizer

logcat_symbolizer

Tool for collecting asan and ubsan sainitizer routput from android logcat and transforming results to html with source code annotation with llvm-symbolizer It can create output as

• source annotated plain text file
• source annotated RetText files for generating html with sphinx where bugs are sorted by file and easy to read index is created to subpages

sanitize on android

With android version 8.1+ it's quie easy using wraph.sh

my wrap.sh for arm64-v8a

#!/system/bin/sh
HERE="$(cd "$(dirname "$0")" && pwd)"
export ASAN_OPTIONS=log_to_syslog=false,allow_user_segv_handler=1,detect_stack_use_after_return=1,check_initialization_order=true,quarantine_size_mb=64,color=never,new_delete_type_mismatch=0
export UBSAN_OPTIONS=print_stacktrace=1,log_to_syslog=false,color=never
export LD_PRELOAD="$HERE/libclang_rt.asan-aarch64-android.so $HERE/libc++_shared.so"
exec "$@"

put this file into app/src/main/java/resources/lib/arm64-v8a/

CMake CXX_FLAGS (assuming ndk-r20 with llvm/clang-8 )

set(SANITIZE_ASAN_FLAGS "-fsanitize=address -fsanitize-address-use-after-scope -fno-optimize-sibling-calls"  )
set(SANITIZE_UBSAN_FLAGS "-fsanitize=alignment,bool,builtin,bounds,enum,float-cast-overflow,float-divide-by-zero,implicit-unsigned-integer-truncation,implicit-signed-integer-truncation,implicit-integer-sign-change,integer-divide-by-zero,nonnull-attribute,null,nullability-arg,nullability-assign,nullability-return,object-size,pointer-overflow,return,returns-nonnull-attribute,shift,signed-integer-overflow,unreachable,unsigned-integer-overflow,vla-bound"  )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SANITIZE_ASAN_FLAGS} ${SANITIZE_UBSAN_FLAGS}"  )
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${SANITIZE_ASAN_FLAGS} ${SANITIZE_UBSAN_FLAGS}"  )

I use too -fuse-ld=lld

collecting data form log cat

just adb -s DEVICE_ID logcat --clear adb -s DEVICE_ID logcat >log.txt

run application

processing output

• ReText ./logcat_symbolizer -l log.txt -r some_directory_for_retext
• plan text ./logcat_symbolizer -l log.txt -o plain_text.txt
• stdout ./logcat_symbolizer -l log.txt