forked from OSchip/llvm-project
88 lines
2.8 KiB
C++
88 lines
2.8 KiB
C++
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//===-- 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_suppressions.h"
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#include "sanitizer_common/sanitizer_symbolizer.h"
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namespace __asan {
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static bool suppressions_inited = false;
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void InitializeSuppressions() {
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CHECK(!suppressions_inited);
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SuppressionContext::InitIfNecessary();
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suppressions_inited = true;
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}
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bool IsInterceptorSuppressed(const char *interceptor_name) {
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CHECK(suppressions_inited);
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SuppressionContext *ctx = SuppressionContext::Get();
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Suppression *s;
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// Match "interceptor_name" suppressions.
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return ctx->Match(interceptor_name, SuppressionInterceptorName, &s);
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}
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bool HaveStackTraceBasedSuppressions() {
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CHECK(suppressions_inited);
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SuppressionContext *ctx = SuppressionContext::Get();
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return ctx->HasSuppressionType(SuppressionInterceptorViaFunction) ||
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ctx->HasSuppressionType(SuppressionInterceptorViaLibrary);
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}
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bool IsStackTraceSuppressed(const StackTrace *stack) {
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CHECK(suppressions_inited);
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if (!HaveStackTraceBasedSuppressions())
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return false;
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SuppressionContext *ctx = SuppressionContext::Get();
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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 (ctx->HasSuppressionType(SuppressionInterceptorViaLibrary)) {
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const char *module_name;
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uptr module_offset;
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// Match "interceptor_via_lib" suppressions.
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if (symbolizer->GetModuleNameAndOffsetForPC(addr, &module_name,
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&module_offset) &&
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ctx->Match(module_name, SuppressionInterceptorViaLibrary, &s)) {
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return true;
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}
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}
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if (ctx->HasSuppressionType(SuppressionInterceptorViaFunction)) {
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SymbolizedStack *frames = symbolizer->SymbolizePC(addr);
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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 (ctx->Match(function_name, SuppressionInterceptorViaFunction, &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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