sanitizer_flags.cpp
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//===-- sanitizer_flags.cpp -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
//
//===----------------------------------------------------------------------===//
#include "sanitizer_flags.h"
#include "sanitizer_common.h"
#include "sanitizer_libc.h"
#include "sanitizer_list.h"
#include "sanitizer_flag_parser.h"
namespace __sanitizer {
CommonFlags common_flags_dont_use;
void CommonFlags::SetDefaults() {
#define COMMON_FLAG(Type, Name, DefaultValue, Description) Name = DefaultValue;
#include "sanitizer_flags.inc"
#undef COMMON_FLAG
}
void CommonFlags::CopyFrom(const CommonFlags &other) {
internal_memcpy(this, &other, sizeof(*this));
}
// Copy the string from "s" to "out", making the following substitutions:
// %b = binary basename
// %p = pid
void SubstituteForFlagValue(const char *s, char *out, uptr out_size) {
char *out_end = out + out_size;
while (*s && out < out_end - 1) {
if (s[0] != '%') {
*out++ = *s++;
continue;
}
switch (s[1]) {
case 'b': {
const char *base = GetProcessName();
CHECK(base);
while (*base && out < out_end - 1)
*out++ = *base++;
s += 2; // skip "%b"
break;
}
case 'p': {
int pid = internal_getpid();
char buf[32];
char *buf_pos = buf + 32;
do {
*--buf_pos = (pid % 10) + '0';
pid /= 10;
} while (pid);
while (buf_pos < buf + 32 && out < out_end - 1)
*out++ = *buf_pos++;
s += 2; // skip "%p"
break;
}
default:
*out++ = *s++;
break;
}
}
CHECK(out < out_end - 1);
*out = '\0';
}
class FlagHandlerInclude : public FlagHandlerBase {
FlagParser *parser_;
bool ignore_missing_;
const char *original_path_;
public:
explicit FlagHandlerInclude(FlagParser *parser, bool ignore_missing)
: parser_(parser), ignore_missing_(ignore_missing), original_path_("") {}
bool Parse(const char *value) final {
original_path_ = value;
if (internal_strchr(value, '%')) {
char *buf = (char *)MmapOrDie(kMaxPathLength, "FlagHandlerInclude");
SubstituteForFlagValue(value, buf, kMaxPathLength);
bool res = parser_->ParseFile(buf, ignore_missing_);
UnmapOrDie(buf, kMaxPathLength);
return res;
}
return parser_->ParseFile(value, ignore_missing_);
}
bool Format(char *buffer, uptr size) override {
// Note `original_path_` isn't actually what's parsed due to `%`
// substitutions. Printing the substituted path would require holding onto
// mmap'ed memory.
return FormatString(buffer, size, original_path_);
}
};
void RegisterIncludeFlags(FlagParser *parser, CommonFlags *cf) {
FlagHandlerInclude *fh_include = new (FlagParser::Alloc)
FlagHandlerInclude(parser, /*ignore_missing*/ false);
parser->RegisterHandler("include", fh_include,
"read more options from the given file");
FlagHandlerInclude *fh_include_if_exists = new (FlagParser::Alloc)
FlagHandlerInclude(parser, /*ignore_missing*/ true);
parser->RegisterHandler(
"include_if_exists", fh_include_if_exists,
"read more options from the given file (if it exists)");
}
void RegisterCommonFlags(FlagParser *parser, CommonFlags *cf) {
#define COMMON_FLAG(Type, Name, DefaultValue, Description) \
RegisterFlag(parser, #Name, Description, &cf->Name);
#include "sanitizer_flags.inc"
#undef COMMON_FLAG
RegisterIncludeFlags(parser, cf);
}
void InitializeCommonFlags(CommonFlags *cf) {
// need to record coverage to generate coverage report.
cf->coverage |= cf->html_cov_report;
SetVerbosity(cf->verbosity);
}
} // namespace __sanitizer