问题
I'm compiling my program with clang++ -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -g -O0
and when I run it, the output is:
matiu@matiu-laptop:~/projects/json++11/build$ ./tests
.......==10534== WARNING: MemorySanitizer: use-of-uninitialized-value
#0 0x7fe7602d4a51 (/home/matiu/projects/json++11/build/tests+0x106a51)
#1 0x7fe7602dfca6 (/home/matiu/projects/json++11/build/tests+0x111ca6)
...
#31 0x7fe75edbaec4 (/lib/x86_64-linux-gnu/libc.so.6+0x21ec4)
#32 0x7fe7602808dc (/home/matiu/projects/json++11/build/tests+0xb28dc)
Uninitialized value was created by a heap allocation
#0 0x7fe76026e7b3 (/home/matiu/projects/json++11/build/tests+0xa07b3)
#1 0x7fe7602ee7da (/home/matiu/projects/json++11/build/tests+0x1207da)
...
#18 0x7fe7602c1c4c (/home/matiu/projects/json++11/build/tests+0xf3c4c)
#19 0x7fe7602873fa (/home/matiu/projects/json++11/build/tests+0xb93fa)
SUMMARY: MemorySanitizer: use-of-uninitialized-value ??:0 ??
Exiting
How can I make it show line numbers like in the beautiful examples: http://clang.llvm.org/docs/MemorySanitizer.html
I'm suspecting it might not be possible, due to my pragram being one giant nested bunch of lambdas: https://github.com/matiu2/json--11/blob/master/tests.cpp
回答1:
With the address sanitizer I noticed that I needed to have these environment variables defined:
ASAN_OPTIONS=symbolize=1
(only needed when compiled with GCC > 4.8) andASAN_SYMBOLIZER_PATH=$(which llvm-symbolizer)
I think the symbolizer is what you're looking for. It transforms symbols to file names with line numbers and columns.
On the memory sanitizer project website it reads:
Symbolization
Set MSAN_SYMBOLIZER_PATH environment variable to the path to llvm-symbolizer binary (normally built with LLVM). MemorySanitizer will use it to symbolize reports on-the-fly.
So you need MSAN_SYMBOLIZER_PATH
to be set analogous to ASAN_SYMBOLIZER_PATH
.
来源:https://stackoverflow.com/questions/24399485/clang-memory-sanitizer-how-to-make-it-print-source-line-numbers