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Make stack bounds detection work with ASAN

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Where a local variable is used as part of the stack bounds detection, it
has to actually be on the stack. ASAN can put local variable on "fake
stacks", however, with addresses in different memory mappings. This
completely destroys the stack bounds calculation, and can lead to e.g.
things not getting GC marked on the machine stack or stackoverflow
checks that always fail.

The __asan_addr_is_in_fake_stack helper can be used to get the _real_
stack address of such variables, and thus perform the stack size
calculation properly

[Bug #20001]
This commit is contained in:
KJ Tsanaktsidis 2023-11-12 13:34:43 +11:00
parent 807714447e
commit cabdaebc70
3 changed files with 38 additions and 6 deletions
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3
thread_win32.c
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@ -11,6 +11,7 @@
#ifdef THREAD_SYSTEM_DEPENDENT_IMPLEMENTATION
#include "internal/sanitizers.h"
#include <process.h>
#define TIME_QUANTUM_USEC (10 * 1000)
@ -592,7 +593,7 @@ COMPILER_WARNING_IGNORED(-Wmaybe-uninitialized)
static inline SIZE_T
query_memory_basic_info(PMEMORY_BASIC_INFORMATION mi, void *local_in_parent_frame)
{
return VirtualQuery(local_in_parent_frame, mi, sizeof(*mi));
return VirtualQuery(asan_get_real_stack_addr(local_in_parent_frame), mi, sizeof(*mi));
}
COMPILER_WARNING_POP