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122 lines
3.7 KiB
C++
122 lines
3.7 KiB
C++
//===-- sanitizer_flags.cc ------------------------------------------------===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of ThreadSanitizer/AddressSanitizer runtime.
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//
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//===----------------------------------------------------------------------===//
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#include "sanitizer_flags.h"
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#include "sanitizer_common.h"
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#include "sanitizer_libc.h"
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namespace __sanitizer {
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CommonFlags common_flags_dont_use_directly;
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void ParseCommonFlagsFromString(const char *str) {
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CommonFlags *f = common_flags();
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ParseFlag(str, &f->malloc_context_size, "malloc_context_size");
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ParseFlag(str, &f->strip_path_prefix, "strip_path_prefix");
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ParseFlag(str, &f->fast_unwind_on_fatal, "fast_unwind_on_fatal");
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ParseFlag(str, &f->fast_unwind_on_malloc, "fast_unwind_on_malloc");
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ParseFlag(str, &f->symbolize, "symbolize");
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ParseFlag(str, &f->handle_ioctl, "handle_ioctl");
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ParseFlag(str, &f->log_path, "log_path");
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ParseFlag(str, &f->detect_leaks, "detect_leaks");
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ParseFlag(str, &f->leak_check_at_exit, "leak_check_at_exit");
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ParseFlag(str, &f->allocator_may_return_null, "allocator_may_return_null");
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}
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static bool GetFlagValue(const char *env, const char *name,
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const char **value, int *value_length) {
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if (env == 0)
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return false;
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const char *pos = 0;
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for (;;) {
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pos = internal_strstr(env, name);
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if (pos == 0)
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return false;
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if (pos != env && ((pos[-1] >= 'a' && pos[-1] <= 'z') || pos[-1] == '_')) {
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// Seems to be middle of another flag name or value.
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env = pos + 1;
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continue;
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}
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break;
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}
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pos += internal_strlen(name);
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const char *end;
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if (pos[0] != '=') {
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end = pos;
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} else {
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pos += 1;
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if (pos[0] == '"') {
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pos += 1;
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end = internal_strchr(pos, '"');
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} else if (pos[0] == '\'') {
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pos += 1;
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end = internal_strchr(pos, '\'');
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} else {
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// Read until the next space or colon.
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end = pos + internal_strcspn(pos, " :");
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}
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if (end == 0)
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end = pos + internal_strlen(pos);
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}
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*value = pos;
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*value_length = end - pos;
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return true;
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}
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static bool StartsWith(const char *flag, int flag_length, const char *value) {
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if (!flag || !value)
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return false;
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int value_length = internal_strlen(value);
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return (flag_length >= value_length) &&
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(0 == internal_strncmp(flag, value, value_length));
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}
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void ParseFlag(const char *env, bool *flag, const char *name) {
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const char *value;
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int value_length;
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if (!GetFlagValue(env, name, &value, &value_length))
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return;
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if (StartsWith(value, value_length, "0") ||
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StartsWith(value, value_length, "no") ||
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StartsWith(value, value_length, "false"))
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*flag = false;
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if (StartsWith(value, value_length, "1") ||
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StartsWith(value, value_length, "yes") ||
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StartsWith(value, value_length, "true"))
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*flag = true;
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}
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void ParseFlag(const char *env, int *flag, const char *name) {
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const char *value;
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int value_length;
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if (!GetFlagValue(env, name, &value, &value_length))
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return;
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*flag = static_cast<int>(internal_atoll(value));
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}
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static LowLevelAllocator allocator_for_flags;
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void ParseFlag(const char *env, const char **flag, const char *name) {
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const char *value;
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int value_length;
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if (!GetFlagValue(env, name, &value, &value_length))
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return;
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// Copy the flag value. Don't use locks here, as flags are parsed at
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// tool startup.
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char *value_copy = (char*)(allocator_for_flags.Allocate(value_length + 1));
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internal_memcpy(value_copy, value, value_length);
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value_copy[value_length] = '\0';
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*flag = value_copy;
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}
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} // namespace __sanitizer
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