diff options
| -rw-r--r-- | compiler-rt/lib/gwp_asan/guarded_pool_allocator.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/compiler-rt/lib/gwp_asan/guarded_pool_allocator.cpp b/compiler-rt/lib/gwp_asan/guarded_pool_allocator.cpp index d784927..8ce5fc9 100644 --- a/compiler-rt/lib/gwp_asan/guarded_pool_allocator.cpp +++ b/compiler-rt/lib/gwp_asan/guarded_pool_allocator.cpp @@ -258,7 +258,10 @@ void GuardedPoolAllocator::trapOnAddress(uintptr_t Address, Error E) { // Raise a SEGV by touching first guard page. volatile char *p = reinterpret_cast<char *>(State.GuardedPagePool); *p = 0; - __builtin_unreachable(); + // Normally, would be __builtin_unreachable(), but because of + // https://bugs.llvm.org/show_bug.cgi?id=47480, unreachable will DCE the + // volatile store above, even though it has side effects. + __builtin_trap(); } void GuardedPoolAllocator::stop() { |