| 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(path: common_flags()->log_path); |
| 48 | AndroidLogInit(); |
| 49 | InitializeCoverage(enabled: common_flags()->coverage, coverage_dir: 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(callback: 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 |
| 77 |