diff options
Diffstat (limited to 'docs/MemorySanitizer.rst')
| -rw-r--r-- | docs/MemorySanitizer.rst | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/docs/MemorySanitizer.rst b/docs/MemorySanitizer.rst index fdb8a81023..439acc47fa 100644 --- a/docs/MemorySanitizer.rst +++ b/docs/MemorySanitizer.rst @@ -46,7 +46,7 @@ to disable inlining (just use ``-O1``) and tail call elimination return 0; } - % clang -fsanitize=memory -fPIE -pie -fno-omit-frame-pointer -g -O2 umr.cc + % clang -fsanitize=memory -fno-omit-frame-pointer -g -O2 umr.cc If a bug is detected, the program will print an error message to stderr and exit with a non-zero exit code. Currently, MemorySanitizer @@ -103,7 +103,7 @@ the example above, .. code-block:: console - % clang -fsanitize=memory -fsanitize-memory-track-origins -fPIE -pie -fno-omit-frame-pointer -g -O2 umr.cc + % clang -fsanitize=memory -fsanitize-memory-track-origins -fno-omit-frame-pointer -g -O2 umr.cc % ./a.out 2>log % projects/compiler-rt/lib/asan/scripts/asan_symbolize.py / < log | c++filt ==14425== WARNING: MemorySanitizer: UMR (uninitialized-memory-read) @@ -160,7 +160,10 @@ Limitations address space. This means that tools like ``ulimit`` may not work as usually expected. * Static linking is not supported. -* Non-position-independent executables are not supported. +* Non-position-independent executables are not supported. Therefore, the + ``fsanitize=memory`` flag will cause Clang to act as though the ``-fPIE`` + flag had been supplied if compiling without ``-fPIC``, and as though the + ``-pie`` flag had been supplied if linking an executable. * Depending on the version of Linux kernel, running without ASLR may be not supported. Note that GDB disables ASLR by default. To debug instrumented programs, use "set disable-randomization off". |