diff options
Diffstat (limited to 'compiler-rt/lib/asan/asan_rtl.cc')
| -rw-r--r-- | compiler-rt/lib/asan/asan_rtl.cc | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/compiler-rt/lib/asan/asan_rtl.cc b/compiler-rt/lib/asan/asan_rtl.cc index 298baadb05f..d0edccc31fc 100644 --- a/compiler-rt/lib/asan/asan_rtl.cc +++ b/compiler-rt/lib/asan/asan_rtl.cc @@ -29,6 +29,7 @@ #include "lsan/lsan_common.h" int __asan_option_detect_stack_use_after_return; // Global interface symbol. +uptr *__asan_test_only_reported_buggy_pointer; // Used only for testing asan. namespace __asan { @@ -374,6 +375,36 @@ void __asan_report_ ## type ## _n(uptr addr, uptr size) { \ ASAN_REPORT_ERROR_N(load, false) ASAN_REPORT_ERROR_N(store, true) +#define ASAN_MEMORY_ACCESS_CALLBACK(type, is_write, size) \ + extern "C" NOINLINE INTERFACE_ATTRIBUTE void __asan_##type##size(uptr addr); \ + void __asan_##type##size(uptr addr) { \ + uptr sp = MEM_TO_SHADOW(addr); \ + uptr s = size <= SHADOW_GRANULARITY ? *reinterpret_cast<u8 *>(sp) \ + : *reinterpret_cast<u16 *>(sp); \ + if (s) { \ + if (size >= SHADOW_GRANULARITY || \ + (((addr & (SHADOW_GRANULARITY - 1)) + size - 1)) >= s) { \ + if (__asan_test_only_reported_buggy_pointer) { \ + *__asan_test_only_reported_buggy_pointer = addr; \ + } else { \ + GET_CALLER_PC_BP_SP; \ + __asan_report_error(pc, bp, sp, addr, is_write, size); \ + } \ + } \ + } \ + } + +ASAN_MEMORY_ACCESS_CALLBACK(load, false, 1) +ASAN_MEMORY_ACCESS_CALLBACK(load, false, 2) +ASAN_MEMORY_ACCESS_CALLBACK(load, false, 4) +ASAN_MEMORY_ACCESS_CALLBACK(load, false, 8) +ASAN_MEMORY_ACCESS_CALLBACK(load, false, 16) +ASAN_MEMORY_ACCESS_CALLBACK(store, true, 1) +ASAN_MEMORY_ACCESS_CALLBACK(store, true, 2) +ASAN_MEMORY_ACCESS_CALLBACK(store, true, 4) +ASAN_MEMORY_ACCESS_CALLBACK(store, true, 8) +ASAN_MEMORY_ACCESS_CALLBACK(store, true, 16) + // Force the linker to keep the symbols for various ASan interface functions. // We want to keep those in the executable in order to let the instrumented // dynamic libraries access the symbol even if it is not used by the executable |
