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author | Simon J. Gerraty <sjg@FreeBSD.org> | 2015-05-27 01:19:58 +0000 |
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committer | Simon J. Gerraty <sjg@FreeBSD.org> | 2015-05-27 01:19:58 +0000 |
commit | 98e0ffaefb0f241cda3a72395d3be04192ae0d47 (patch) | |
tree | 55c065b6730aaac2afb6c29933ee6ec5fa4c4249 /contrib/compiler-rt/lib/asan/asan_suppressions.cc | |
parent | b17ff922d4072ae132ece458f5b5d74a236880ac (diff) | |
parent | e81032ad243db32b8fd615b2d55ee94b9f6a5b6a (diff) | |
download | src-98e0ffaefb0f241cda3a72395d3be04192ae0d47.tar.gz src-98e0ffaefb0f241cda3a72395d3be04192ae0d47.zip |
Merge sync of head
Notes
Notes:
svn path=/projects/bmake/; revision=283595
Diffstat (limited to 'contrib/compiler-rt/lib/asan/asan_suppressions.cc')
-rw-r--r-- | contrib/compiler-rt/lib/asan/asan_suppressions.cc | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/contrib/compiler-rt/lib/asan/asan_suppressions.cc b/contrib/compiler-rt/lib/asan/asan_suppressions.cc new file mode 100644 index 000000000000..62198aec64e7 --- /dev/null +++ b/contrib/compiler-rt/lib/asan/asan_suppressions.cc @@ -0,0 +1,93 @@ +//===-- asan_suppressions.cc ----------------------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// This file is a part of AddressSanitizer, an address sanity checker. +// +// Issue suppression and suppression-related functions. +//===----------------------------------------------------------------------===// + +#include "asan_suppressions.h" + +#include "asan_stack.h" +#include "sanitizer_common/sanitizer_placement_new.h" +#include "sanitizer_common/sanitizer_suppressions.h" +#include "sanitizer_common/sanitizer_symbolizer.h" + +namespace __asan { + +ALIGNED(64) static char suppression_placeholder[sizeof(SuppressionContext)]; +static SuppressionContext *suppression_ctx = nullptr; +static const char kInterceptorName[] = "interceptor_name"; +static const char kInterceptorViaFunction[] = "interceptor_via_fun"; +static const char kInterceptorViaLibrary[] = "interceptor_via_lib"; +static const char *kSuppressionTypes[] = { + kInterceptorName, kInterceptorViaFunction, kInterceptorViaLibrary}; + +void InitializeSuppressions() { + CHECK_EQ(nullptr, suppression_ctx); + suppression_ctx = new (suppression_placeholder) // NOLINT + SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes)); + suppression_ctx->ParseFromFile(flags()->suppressions); +} + +bool IsInterceptorSuppressed(const char *interceptor_name) { + CHECK(suppression_ctx); + Suppression *s; + // Match "interceptor_name" suppressions. + return suppression_ctx->Match(interceptor_name, kInterceptorName, &s); +} + +bool HaveStackTraceBasedSuppressions() { + CHECK(suppression_ctx); + return suppression_ctx->HasSuppressionType(kInterceptorViaFunction) || + suppression_ctx->HasSuppressionType(kInterceptorViaLibrary); +} + +bool IsStackTraceSuppressed(const StackTrace *stack) { + if (!HaveStackTraceBasedSuppressions()) + return false; + + CHECK(suppression_ctx); + Symbolizer *symbolizer = Symbolizer::GetOrInit(); + Suppression *s; + for (uptr i = 0; i < stack->size && stack->trace[i]; i++) { + uptr addr = stack->trace[i]; + + if (suppression_ctx->HasSuppressionType(kInterceptorViaLibrary)) { + const char *module_name; + uptr module_offset; + // Match "interceptor_via_lib" suppressions. + if (symbolizer->GetModuleNameAndOffsetForPC(addr, &module_name, + &module_offset) && + suppression_ctx->Match(module_name, kInterceptorViaLibrary, &s)) { + return true; + } + } + + if (suppression_ctx->HasSuppressionType(kInterceptorViaFunction)) { + SymbolizedStack *frames = symbolizer->SymbolizePC(addr); + for (SymbolizedStack *cur = frames; cur; cur = cur->next) { + const char *function_name = cur->info.function; + if (!function_name) { + continue; + } + // Match "interceptor_via_fun" suppressions. + if (suppression_ctx->Match(function_name, kInterceptorViaFunction, + &s)) { + frames->ClearAll(); + return true; + } + } + frames->ClearAll(); + } + } + return false; +} + +} // namespace __asan |