fb6513130d
Intended use-case is for threads that use (or switch to) stack with special properties e.g. backed by MADV_DONTDUMP memory. --------- Co-authored-by: Vitaly Buka <vitalybuka@google.com>
40 lines
1.2 KiB
C++
40 lines
1.2 KiB
C++
// RUN: %clangxx_asan %s -o %t && env ASAN_OPTIONS=detect_stack_use_after_return=1 %run %t
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// RUN: %clangxx_asan %s -mllvm -asan-use-after-return=runtime -o %t && env ASAN_OPTIONS=detect_stack_use_after_return=1 %run %t
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// RUN: %clangxx_asan %s -mllvm -asan-use-after-return=always -o %t && %run %t
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#include "defines.h"
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#include <cassert>
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#include <sanitizer/asan_interface.h>
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volatile uintptr_t saved;
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ATTRIBUTE_NOINLINE bool IsOnRealStack(uintptr_t parent_frame,
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uintptr_t var_addr) {
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uintptr_t this_frame =
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reinterpret_cast<uintptr_t>(__builtin_frame_address(0));
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return this_frame <= var_addr && var_addr <= parent_frame;
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}
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ATTRIBUTE_NOINLINE bool IsOnRealStack(uintptr_t parent_frame) {
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volatile char temp = ' ';
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saved = reinterpret_cast<uintptr_t>(&temp);
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return IsOnRealStack(parent_frame, saved);
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}
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ATTRIBUTE_NOINLINE bool IsOnRealStack() {
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return IsOnRealStack(reinterpret_cast<uintptr_t>(__builtin_frame_address(0)));
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}
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int main(int argc, char *argv[]) {
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assert(!IsOnRealStack());
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__asan_suppress_fake_stack();
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assert(IsOnRealStack());
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__asan_unsuppress_fake_stack();
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assert(!IsOnRealStack());
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return 0;
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}
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