libsanitizer/sanitizer_common/sanitizer_flags.cc

   1 //===-- sanitizer_flags.cc ------------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of ThreadSanitizer/AddressSanitizer runtime.
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #include "sanitizer_flags.h"
  13
  14 #include "sanitizer_common.h"
  15 #include "sanitizer_libc.h"
  16 #include "sanitizer_list.h"
  17 #include "sanitizer_flag_parser.h"
  18
  19 namespace __sanitizer {
  20
  21 CommonFlags common_flags_dont_use;
  22
  23 void CommonFlags::SetDefaults() {
  24 #define COMMON_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
  25 #include "sanitizer_flags.inc"
  26 #undef COMMON_FLAG
  27 }
  28
  29 void CommonFlags::CopyFrom(const CommonFlags &other) {
  30   internal_memcpy(this, &other, sizeof(*this));
  31 }
  32
  33 // Copy the string from "s" to "out", making the following substitutions:
  34 // %b = binary basename
  35 // %p = pid
  36 void SubstituteForFlagValue(const char *s, char *out, uptr out_size) {
  37   char *out_end = out + out_size;
  38   while (*s && out < out_end - 1) {
  39     if (s[0] != '%') {
  40       *out++ = *s++;
  41       continue;
  42     }
  43     switch (s[1]) {
  44       case 'b': {
  45         const char *base = GetProcessName();
  46         CHECK(base);
  47         while (*base && out < out_end - 1)
  48           *out++ = *base++;
  49         s += 2; // skip "%b"
  50         break;
  51       }
  52       case 'p': {
  53         int pid = internal_getpid();
  54         char buf[32];
  55         char *buf_pos = buf + 32;
  56         do {
  57           *--buf_pos = (pid % 10) + '0';
  58           pid /= 10;
  59         } while (pid);
  60         while (buf_pos < buf + 32 && out < out_end - 1)
  61           *out++ = *buf_pos++;
  62         s += 2; // skip "%p"
  63         break;
  64       }
  65       default:
  66         *out++ = *s++;
  67         break;
  68     }
  69   }
  70   CHECK(out < out_end - 1);
  71   *out = '\0';
  72 }
  73
  74 class FlagHandlerInclude : public FlagHandlerBase {
  75   FlagParser *parser_;
  76   bool ignore_missing_;
  77
  78  public:
  79   explicit FlagHandlerInclude(FlagParser *parser, bool ignore_missing)
  80       : parser_(parser), ignore_missing_(ignore_missing) {}
  81   bool Parse(const char *value) final {
  82     if (internal_strchr(value, '%')) {
  83       char *buf = (char *)MmapOrDie(kMaxPathLength, "FlagHandlerInclude");
  84       SubstituteForFlagValue(value, buf, kMaxPathLength);
  85       bool res = parser_->ParseFile(buf, ignore_missing_);
  86       UnmapOrDie(buf, kMaxPathLength);
  87       return res;
  88     }
  89     return parser_->ParseFile(value, ignore_missing_);
  90   }
  91 };
  92
  93 void RegisterIncludeFlags(FlagParser *parser, CommonFlags *cf) {
  94   FlagHandlerInclude *fh_include = new (FlagParser::Alloc) // NOLINT
  95       FlagHandlerInclude(parser, /*ignore_missing*/ false);
  96   parser->RegisterHandler("include", fh_include,
  97                           "read more options from the given file");
  98   FlagHandlerInclude *fh_include_if_exists = new (FlagParser::Alloc) // NOLINT
  99       FlagHandlerInclude(parser, /*ignore_missing*/ true);
 100   parser->RegisterHandler(
 101       "include_if_exists", fh_include_if_exists,
 102       "read more options from the given file (if it exists)");
 103 }
 104
 105 void RegisterCommonFlags(FlagParser *parser, CommonFlags *cf) {
 106 #define COMMON_FLAG(Type, Name, DefaultValue, Description) \
 107   RegisterFlag(parser, #Name, Description, &cf->Name);
 108 #include "sanitizer_flags.inc"
 109 #undef COMMON_FLAG
 110
 111   RegisterIncludeFlags(parser, cf);
 112 }
 113
 114 void InitializeCommonFlags(CommonFlags *cf) {
 115   // need to record coverage to generate coverage report.
 116   cf->coverage |= cf->html_cov_report;
 117   SetVerbosity(cf->verbosity);
 118 }
 119
 120 }  // namespace __sanitizer