forked from OSchip/llvm-project
112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
//===-- asan_suppressions.cc ----------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of AddressSanitizer, an address sanity checker.
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//
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// Issue suppression and suppression-related functions.
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//===----------------------------------------------------------------------===//
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#include "asan_suppressions.h"
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#include "asan_stack.h"
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#include "sanitizer_common/sanitizer_placement_new.h"
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#include "sanitizer_common/sanitizer_suppressions.h"
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#include "sanitizer_common/sanitizer_symbolizer.h"
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namespace __asan {
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ALIGNED(64) static char suppression_placeholder[sizeof(SuppressionContext)];
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static SuppressionContext *suppression_ctx = nullptr;
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static const char kInterceptorName[] = "interceptor_name";
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static const char kInterceptorViaFunction[] = "interceptor_via_fun";
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static const char kInterceptorViaLibrary[] = "interceptor_via_lib";
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static const char kODRViolation[] = "odr_violation";
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static const char *kSuppressionTypes[] = {
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kInterceptorName, kInterceptorViaFunction, kInterceptorViaLibrary,
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kODRViolation};
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extern "C" {
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#if SANITIZER_SUPPORTS_WEAK_HOOKS
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SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
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const char *__asan_default_suppressions();
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#else
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// No week hooks, provide empty implementation.
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const char *__asan_default_suppressions() { return ""; }
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#endif // SANITIZER_SUPPORTS_WEAK_HOOKS
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} // extern "C"
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void InitializeSuppressions() {
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CHECK_EQ(nullptr, suppression_ctx);
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suppression_ctx = new (suppression_placeholder) // NOLINT
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SuppressionContext(kSuppressionTypes, ARRAY_SIZE(kSuppressionTypes));
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suppression_ctx->ParseFromFile(flags()->suppressions);
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if (&__asan_default_suppressions)
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suppression_ctx->Parse(__asan_default_suppressions());
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}
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bool IsInterceptorSuppressed(const char *interceptor_name) {
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CHECK(suppression_ctx);
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Suppression *s;
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// Match "interceptor_name" suppressions.
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return suppression_ctx->Match(interceptor_name, kInterceptorName, &s);
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}
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bool HaveStackTraceBasedSuppressions() {
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CHECK(suppression_ctx);
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return suppression_ctx->HasSuppressionType(kInterceptorViaFunction) ||
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suppression_ctx->HasSuppressionType(kInterceptorViaLibrary);
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}
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bool IsODRViolationSuppressed(const char *global_var_name) {
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CHECK(suppression_ctx);
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Suppression *s;
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// Match "odr_violation" suppressions.
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return suppression_ctx->Match(global_var_name, kODRViolation, &s);
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}
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bool IsStackTraceSuppressed(const StackTrace *stack) {
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if (!HaveStackTraceBasedSuppressions())
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return false;
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CHECK(suppression_ctx);
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Symbolizer *symbolizer = Symbolizer::GetOrInit();
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Suppression *s;
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for (uptr i = 0; i < stack->size && stack->trace[i]; i++) {
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uptr addr = stack->trace[i];
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if (suppression_ctx->HasSuppressionType(kInterceptorViaLibrary)) {
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// Match "interceptor_via_lib" suppressions.
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if (const char *module_name = symbolizer->GetModuleNameForPc(addr))
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if (suppression_ctx->Match(module_name, kInterceptorViaLibrary, &s))
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return true;
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}
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if (suppression_ctx->HasSuppressionType(kInterceptorViaFunction)) {
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SymbolizedStack *frames = symbolizer->SymbolizePC(addr);
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CHECK(frames);
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for (SymbolizedStack *cur = frames; cur; cur = cur->next) {
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const char *function_name = cur->info.function;
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if (!function_name) {
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continue;
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}
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// Match "interceptor_via_fun" suppressions.
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if (suppression_ctx->Match(function_name, kInterceptorViaFunction,
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&s)) {
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frames->ClearAll();
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return true;
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}
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}
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frames->ClearAll();
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}
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}
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return false;
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}
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} // namespace __asan
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