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      1 //===-- ubsan_init.cc -----------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // Initialization of UBSan runtime.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "ubsan_platform.h"
     15 #if CAN_SANITIZE_UB
     16 #include "ubsan_diag.h"
     17 #include "ubsan_init.h"
     18 #include "ubsan_flags.h"
     19 #include "sanitizer_common/sanitizer_common.h"
     20 #include "sanitizer_common/sanitizer_libc.h"
     21 #include "sanitizer_common/sanitizer_mutex.h"
     22 #include "sanitizer_common/sanitizer_symbolizer.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 CommonStandaloneInit() {
     38   SanitizerToolName = GetSanititizerToolName();
     39   CacheBinaryName();
     40   InitializeFlags();
     41   __sanitizer_set_report_path(common_flags()->log_path);
     42   AndroidLogInit();
     43   InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
     44   CommonInit();
     45 }
     46 
     47 void __ubsan::InitAsStandalone() {
     48   SpinMutexLock l(&ubsan_init_mu);
     49   if (!ubsan_initialized) {
     50     CommonStandaloneInit();
     51     ubsan_initialized = true;
     52   }
     53 }
     54 
     55 void __ubsan::InitAsStandaloneIfNecessary() { return InitAsStandalone(); }
     56 
     57 void __ubsan::InitAsPlugin() {
     58   SpinMutexLock l(&ubsan_init_mu);
     59   if (!ubsan_initialized) {
     60     CommonInit();
     61     ubsan_initialized = true;
     62   }
     63 }
     64 
     65 #endif  // CAN_SANITIZE_UB
     66