Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 1 | //===-- tsan_suppressions.cc ------------------------------------*- C++ -*-===// |
| 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 "tsan_suppressions.h" |
| 15 | #include "tsan_rtl.h" |
| 16 | #include "tsan_flags.h" |
| 17 | #include "tsan_mman.h" |
| 18 | #include "tsan_platform.h" |
| 19 | |
| 20 | namespace __tsan { |
| 21 | |
| 22 | static Suppression *g_suppressions; |
| 23 | |
| 24 | static char *ReadFile(const char *filename) { |
| 25 | if (filename == 0 || filename[0] == 0) |
| 26 | return 0; |
| 27 | InternalScopedBuf<char> tmp(4*1024); |
| 28 | if (filename[0] == '/') |
| 29 | Snprintf(tmp, tmp.Size(), "%s", filename); |
| 30 | else |
| 31 | Snprintf(tmp, tmp.Size(), "%s/%s", internal_getpwd(), filename); |
| 32 | fd_t fd = internal_open(tmp, false); |
| 33 | if (fd == kInvalidFd) { |
| 34 | Printf("ThreadSanitizer: failed to open suppressions file '%s'\n", |
| 35 | tmp.Ptr()); |
| 36 | Die(); |
| 37 | } |
| 38 | const uptr fsize = internal_filesize(fd); |
| 39 | if (fsize == (uptr)-1) { |
| 40 | Printf("ThreadSanitizer: failed to stat suppressions file '%s'\n", |
| 41 | tmp.Ptr()); |
| 42 | Die(); |
| 43 | } |
| 44 | char *buf = (char*)internal_alloc(MBlockSuppression, fsize + 1); |
| 45 | if (fsize != internal_read(fd, buf, fsize)) { |
| 46 | Printf("ThreadSanitizer: failed to read suppressions file '%s'\n", |
| 47 | tmp.Ptr()); |
| 48 | Die(); |
| 49 | } |
| 50 | internal_close(fd); |
| 51 | buf[fsize] = 0; |
| 52 | return buf; |
| 53 | } |
| 54 | |
| 55 | bool SuppressionMatch(char *templ, const char *str) { |
Dmitry Vyukov | d6ffccd | 2012-05-31 13:18:11 +0000 | [diff] [blame^] | 56 | if (str == 0 || str[0] == 0) |
| 57 | return false; |
Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 58 | char *tpos; |
| 59 | const char *spos; |
| 60 | while (templ && templ[0]) { |
| 61 | if (templ[0] == '*') { |
| 62 | templ++; |
| 63 | continue; |
| 64 | } |
| 65 | if (str[0] == 0) |
| 66 | return false; |
| 67 | tpos = (char*)internal_strchr(templ, '*'); |
| 68 | if (tpos != 0) |
| 69 | tpos[0] = 0; |
| 70 | spos = internal_strstr(str, templ); |
| 71 | str = spos + internal_strlen(templ); |
| 72 | templ = tpos; |
| 73 | if (tpos) |
| 74 | tpos[0] = '*'; |
| 75 | if (spos == 0) |
| 76 | return false; |
| 77 | } |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | Suppression *SuppressionParse(const char* supp) { |
| 82 | Suppression *head = 0; |
| 83 | const char *line = supp; |
| 84 | while (line) { |
| 85 | while (line[0] == ' ' || line[0] == '\t') |
| 86 | line++; |
| 87 | const char *end = internal_strchr(line, '\n'); |
| 88 | if (end == 0) |
| 89 | end = line + internal_strlen(line); |
| 90 | if (line != end && line[0] != '#') { |
| 91 | const char *end2 = end; |
| 92 | while (line != end2 && (end2[-1] == ' ' || end2[-1] == '\t')) |
| 93 | end2--; |
| 94 | SuppressionType stype; |
| 95 | if (0 == internal_strncmp(line, "race:", sizeof("race:") - 1)) { |
| 96 | stype = SuppressionRace; |
| 97 | line += sizeof("race:") - 1; |
| 98 | } else if (0 == internal_strncmp(line, "thread:", |
| 99 | sizeof("thread:") - 1)) { |
| 100 | stype = SuppressionThread; |
| 101 | line += sizeof("thread:") - 1; |
| 102 | } else if (0 == internal_strncmp(line, "mutex:", |
| 103 | sizeof("mutex:") - 1)) { |
| 104 | stype = SuppressionMutex; |
| 105 | line += sizeof("mutex:") - 1; |
| 106 | } else if (0 == internal_strncmp(line, "signal:", |
| 107 | sizeof("signal:") - 1)) { |
| 108 | stype = SuppressionSignal; |
| 109 | line += sizeof("signal:") - 1; |
| 110 | } else { |
| 111 | Printf("ThreadSanitizer: failed to parse suppressions file\n"); |
| 112 | Die(); |
| 113 | } |
| 114 | Suppression *s = (Suppression*)internal_alloc(MBlockSuppression, |
| 115 | sizeof(Suppression)); |
| 116 | s->next = head; |
| 117 | head = s; |
| 118 | s->type = stype; |
Dmitry Vyukov | d6ffccd | 2012-05-31 13:18:11 +0000 | [diff] [blame^] | 119 | s->templ = (char*)internal_alloc(MBlockSuppression, end2 - line + 1); |
| 120 | internal_memcpy(s->templ, line, end2 - line); |
| 121 | s->templ[end2 - line] = 0; |
Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 122 | } |
| 123 | if (end[0] == 0) |
| 124 | break; |
| 125 | line = end + 1; |
| 126 | } |
| 127 | return head; |
| 128 | } |
| 129 | |
Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 130 | void InitializeSuppressions() { |
| 131 | char *supp = ReadFile(flags()->suppressions); |
| 132 | g_suppressions = SuppressionParse(supp); |
| 133 | } |
| 134 | |
Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 135 | bool IsSuppressed(ReportType typ, const ReportStack *stack) { |
| 136 | if (g_suppressions == 0 || stack == 0) |
| 137 | return false; |
| 138 | SuppressionType stype; |
| 139 | if (typ == ReportTypeRace) |
| 140 | stype = SuppressionRace; |
| 141 | else if (typ == ReportTypeThreadLeak) |
| 142 | stype = SuppressionThread; |
| 143 | else if (typ == ReportTypeMutexDestroyLocked) |
| 144 | stype = SuppressionMutex; |
| 145 | else if (typ == ReportTypeSignalUnsafe) |
| 146 | stype = SuppressionSignal; |
| 147 | else |
| 148 | return false; |
| 149 | for (const ReportStack *frame = stack; frame; frame = frame->next) { |
Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 150 | for (Suppression *supp = g_suppressions; supp; supp = supp->next) { |
Dmitry Vyukov | d6ffccd | 2012-05-31 13:18:11 +0000 | [diff] [blame^] | 151 | if (stype == supp->type || |
| 152 | SuppressionMatch(supp->templ, frame->func) || |
| 153 | SuppressionMatch(supp->templ, frame->file)) { |
| 154 | DPrintf("ThreadSanitizer: matched suppression '%s'\n", supp->templ); |
Kostya Serebryany | 4ad375f | 2012-05-10 13:48:04 +0000 | [diff] [blame] | 155 | return true; |
| 156 | } |
| 157 | } |
| 158 | } |
| 159 | return false; |
| 160 | } |
| 161 | } // namespace __tsan |