libsanitizer/ubsan/ubsan_init.cpp

   1 //===-- ubsan_init.cpp ----------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // Initialization of UBSan runtime.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "ubsan_platform.h"
  14 #if CAN_SANITIZE_UB
  15 #include "sanitizer_common/sanitizer_common.h"
  16 #include "sanitizer_common/sanitizer_interface_internal.h"
  17 #include "sanitizer_common/sanitizer_libc.h"
  18 #include "sanitizer_common/sanitizer_mutex.h"
  19 #include "sanitizer_common/sanitizer_symbolizer.h"
  20 #include "ubsan_diag.h"
  21 #include "ubsan_flags.h"
  22 #include "ubsan_init.h"
  23
  24 using namespace __ubsan;
  25
  26 const char *__ubsan::GetSanititizerToolName() {
  27   return "UndefinedBehaviorSanitizer";
  28 }
  29
  30 static bool ubsan_initialized;
  31 static StaticSpinMutex ubsan_init_mu;
  32
  33 static void CommonInit() {
  34   InitializeSuppressions();
  35 }
  36
  37 static void UbsanDie() {
  38   if (common_flags()->print_module_map >= 1)
  39     DumpProcessMap();
  40 }
  41
  42 static void CommonStandaloneInit() {
  43   SanitizerToolName = GetSanititizerToolName();
  44   CacheBinaryName();
  45   InitializeFlags();
  46   __sanitizer::InitializePlatformEarly();
  47   __sanitizer_set_report_path(common_flags()->log_path);
  48   AndroidLogInit();
  49   InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
  50   CommonInit();
  51
  52   // Only add die callback when running in standalone mode to avoid printing
  53   // the same information from multiple sanitizers' output
  54   AddDieCallback(UbsanDie);
  55   Symbolizer::LateInitialize();
  56 }
  57
  58 void __ubsan::InitAsStandalone() {
  59   SpinMutexLock l(&ubsan_init_mu);
  60   if (!ubsan_initialized) {
  61     CommonStandaloneInit();
  62     ubsan_initialized = true;
  63   }
  64 }
  65
  66 void __ubsan::InitAsStandaloneIfNecessary() { return InitAsStandalone(); }
  67
  68 void __ubsan::InitAsPlugin() {
  69   SpinMutexLock l(&ubsan_init_mu);
  70   if (!ubsan_initialized) {
  71     CommonInit();
  72     ubsan_initialized = true;
  73   }
  74 }
  75
  76 #endif  // CAN_SANITIZE_UB