tsan_flags.cc revision b78caa645f70eff2f037f1f8bb43ca9129dbd8d9
1//===-- tsan_flags.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// This file is a part of ThreadSanitizer (TSan), a race detector. 11// 12//===----------------------------------------------------------------------===// 13 14#include "sanitizer_common/sanitizer_libc.h" 15#include "tsan_flags.h" 16#include "tsan_rtl.h" 17#include "tsan_mman.h" 18 19namespace __tsan { 20 21static void Flag(const char *env, bool *flag, const char *name); 22static void Flag(const char *env, int *flag, const char *name); 23static void Flag(const char *env, const char **flag, const char *name); 24 25Flags *flags() { 26 return &CTX()->flags; 27} 28 29// Can be overriden in frontend. 30void WEAK OverrideFlags(Flags *f) { 31 (void)f; 32} 33 34void InitializeFlags(Flags *f, const char *env) { 35 internal_memset(f, 0, sizeof(*f)); 36 37 // Default values. 38 f->enable_annotations = true; 39 f->suppress_equal_stacks = true; 40 f->suppress_equal_addresses = true; 41 f->report_thread_leaks = true; 42 f->report_signal_unsafe = true; 43 f->force_seq_cst_atomics = false; 44 f->strip_path_prefix = ""; 45 f->suppressions = ""; 46 f->exitcode = 66; 47 f->log_fileno = 2; 48 f->atexit_sleep_ms = 1000; 49 f->verbosity = 0; 50 f->profile_memory = ""; 51 f->flush_memory_ms = 0; 52 f->stop_on_start = false; 53 f->running_on_valgrind = false; 54 f->use_internal_symbolizer = false; 55 56 // Let a frontend override. 57 OverrideFlags(f); 58 59 // Override from command line. 60 Flag(env, &f->enable_annotations, "enable_annotations"); 61 Flag(env, &f->suppress_equal_stacks, "suppress_equal_stacks"); 62 Flag(env, &f->suppress_equal_addresses, "suppress_equal_addresses"); 63 Flag(env, &f->report_thread_leaks, "report_thread_leaks"); 64 Flag(env, &f->report_signal_unsafe, "report_signal_unsafe"); 65 Flag(env, &f->force_seq_cst_atomics, "force_seq_cst_atomics"); 66 Flag(env, &f->strip_path_prefix, "strip_path_prefix"); 67 Flag(env, &f->suppressions, "suppressions"); 68 Flag(env, &f->exitcode, "exitcode"); 69 Flag(env, &f->log_fileno, "log_fileno"); 70 Flag(env, &f->atexit_sleep_ms, "atexit_sleep_ms"); 71 Flag(env, &f->verbosity, "verbosity"); 72 Flag(env, &f->profile_memory, "profile_memory"); 73 Flag(env, &f->flush_memory_ms, "flush_memory_ms"); 74 Flag(env, &f->stop_on_start, "stop_on_start"); 75 Flag(env, &f->use_internal_symbolizer, "use_internal_symbolizer"); 76} 77 78static const char *GetFlagValue(const char *env, const char *name, 79 const char **end) { 80 if (env == 0) 81 return *end = 0; 82 const char *pos = internal_strstr(env, name); 83 if (pos == 0) 84 return *end = 0; 85 pos += internal_strlen(name); 86 if (pos[0] != '=') 87 return *end = pos; 88 pos += 1; 89 if (pos[0] == '"') { 90 pos += 1; 91 *end = internal_strchr(pos, '"'); 92 } else if (pos[0] == '\'') { 93 pos += 1; 94 *end = internal_strchr(pos, '\''); 95 } else { 96 *end = internal_strchr(pos, ' '); 97 } 98 if (*end == 0) 99 *end = pos + internal_strlen(pos); 100 return pos; 101} 102 103static void Flag(const char *env, bool *flag, const char *name) { 104 const char *end = 0; 105 const char *val = GetFlagValue(env, name, &end); 106 if (val == 0) 107 return; 108 int len = end - val; 109 if (len == 1 && val[0] == '0') 110 *flag = false; 111 else if (len == 1 && val[0] == '1') 112 *flag = true; 113} 114 115static void Flag(const char *env, int *flag, const char *name) { 116 const char *end = 0; 117 const char *val = GetFlagValue(env, name, &end); 118 if (val == 0) 119 return; 120 bool minus = false; 121 if (val != end && val[0] == '-') { 122 minus = true; 123 val += 1; 124 } 125 int v = 0; 126 for (; val != end; val++) { 127 if (val[0] < '0' || val[0] > '9') 128 break; 129 v = v * 10 + val[0] - '0'; 130 } 131 if (minus) 132 v = -v; 133 *flag = v; 134} 135 136static void Flag(const char *env, const char **flag, const char *name) { 137 const char *end = 0; 138 const char *val = GetFlagValue(env, name, &end); 139 if (val == 0) 140 return; 141 int len = end - val; 142 char *f = (char*)internal_alloc(MBlockFlag, len + 1); 143 internal_memcpy(f, val, len); 144 f[len] = 0; 145 *flag = f; 146} 147 148} // namespace __tsan 149