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sim/lsan: disable fast-unwind by default 

The fast-unwind implementation of leak-sanitizer will obtain the
current stack top/bottom and frame address(Stack Pointer) for
backtrace calculation:

https://github.com/gcc-mirror/gcc/blob/releases/gcc-13/libsanitizer/lsan/lsan.cpp#L39-L42

Since the scheduling mechanism of NuttX sim is coroutine
(setjmp/longjmp), if the Stack Pointer is switched, the fast-unwind
will unable to get the available address, so the memory leaks on the
system/application side that cannot be caught normally. This PR will
disable fast-unwind by default to avoid unwind failure.

Signed-off-by: chao an <anchao@xiaomi.com>
This commit is contained in:
chao an 2023-05-04 20:04:16 +08:00 committed by Petro Karashchenko
parent 1e22163b57
commit 1be95c3313
1 changed files with 30 additions and 0 deletions
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30
arch/sim/src/sim/sim_head.c
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@ -97,6 +97,36 @@ static void allsyms_relocate(void)
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: __lsan_default_options
*
* Description:
* This function may be optionally provided by user and should return
* a string containing leak sanitizer runtime options.
*
****************************************************************************/
#ifdef CONFIG_SIM_ASAN
const char *__lsan_default_options(void)
{
/* The fast-unwind implementation of leak-sanitizer will obtain the
* current stack top/bottom and frame address(Stack Pointer) for
* backtrace calculation:
*
* https://github.com/gcc-mirror/gcc/blob/releases/gcc-13/libsanitizer/
* lsan/lsan.cpp#L39-L42
*
* Since the scheduling mechanism of NuttX sim is coroutine
* (setjmp/longjmp), if the Stack Pointer is switched, the fast-unwind
* will unable to get the available address, so the memory leaks on the
* system/application side that cannot be caught normally. This PR will
* disable fast-unwind by default to avoid unwind failure.
*/
return "fast_unwind_on_malloc=0";
}
#endif
/****************************************************************************
* Name: main
*