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 
GetSanititizerToolName()26 const char *__ubsan::GetSanititizerToolName() {
27   return "UndefinedBehaviorSanitizer";
28 }
29 
30 static bool ubsan_initialized;
31 static StaticSpinMutex ubsan_init_mu;
32 
CommonInit()33 static void CommonInit() {
34   InitializeSuppressions();
35 }
36 
CommonStandaloneInit()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 
InitAsStandalone()47 void __ubsan::InitAsStandalone() {
48   SpinMutexLock l(&ubsan_init_mu);
49   if (!ubsan_initialized) {
50     CommonStandaloneInit();
51     ubsan_initialized = true;
52   }
53 }
54 
InitAsStandaloneIfNecessary()55 void __ubsan::InitAsStandaloneIfNecessary() { return InitAsStandalone(); }
56 
InitAsPlugin()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