forked from OSchip/llvm-project
129 lines
3.6 KiB
C++
129 lines
3.6 KiB
C++
//===-- sanitizer_flag_parser.cc ------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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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_flag_parser.h"
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#include "sanitizer_common.h"
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#include "sanitizer_libc.h"
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#include "sanitizer_flags.h"
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#include "sanitizer_flag_parser.h"
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#include "sanitizer_allocator_internal.h"
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namespace __sanitizer {
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void FlagParser::PrintFlagDescriptions() {
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Printf("Available flags for %s:\n", SanitizerToolName);
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for (int i = 0; i < n_flags_; ++i)
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Printf("\t%s\n\t\t- %s\n", flags_[i].name, flags_[i].desc);
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}
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void FlagParser::fatal_error(const char *err) {
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Printf("ERROR: %s\n", err);
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Die();
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}
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bool FlagParser::is_space(char c) {
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return c == ' ' || c == ',' || c == ':' || c == '\n' || c == '\t' ||
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c == '\r';
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}
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void FlagParser::skip_whitespace() {
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while (is_space(buf_[pos_])) ++pos_;
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}
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void FlagParser::parse_flag() {
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uptr name_start = pos_;
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while (buf_[pos_] != 0 && buf_[pos_] != '=' && !is_space(buf_[pos_])) ++pos_;
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if (buf_[pos_] != '=') fatal_error("expected '='");
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char *name = internal_strndup(buf_ + name_start, pos_ - name_start);
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uptr value_start = ++pos_;
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char *value;
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if (buf_[pos_] == '\'' || buf_[pos_] == '"') {
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char quote = buf_[pos_++];
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while (buf_[pos_] != 0 && buf_[pos_] != quote) ++pos_;
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if (buf_[pos_] == 0) fatal_error("unterminated string");
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value = internal_strndup(buf_ + value_start + 1, pos_ - value_start - 1);
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++pos_; // consume the closing quote
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} else {
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while (buf_[pos_] != 0 && !is_space(buf_[pos_])) ++pos_;
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if (buf_[pos_] != 0 && !is_space(buf_[pos_]))
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fatal_error("expected separator or eol");
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value = internal_strndup(buf_ + value_start, pos_ - value_start);
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}
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bool res = run_handler(name, value);
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if (!res) {
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Printf("Flag parsing failed.");
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Die();
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}
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InternalFree(name);
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InternalFree(value);
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}
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void FlagParser::parse_flags() {
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while (true) {
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skip_whitespace();
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if (buf_[pos_] == 0) break;
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parse_flag();
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}
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// Do a sanity check for certain flags.
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if (common_flags_dont_use.malloc_context_size < 1)
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common_flags_dont_use.malloc_context_size = 1;
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}
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void FlagParser::ParseString(const char *s) {
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if (!s) return;
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// Backup current parser state to allow nested ParseString() calls.
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const char *old_buf_ = buf_;
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uptr old_pos_ = pos_;
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buf_ = s;
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pos_ = 0;
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parse_flags();
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buf_ = old_buf_;
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pos_ = old_pos_;
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}
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bool FlagParser::run_handler(const char *name, const char *value) {
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for (int i = 0; i < n_flags_; ++i) {
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if (internal_strcmp(name, flags_[i].name) == 0)
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return flags_[i].handler->Parse(value);
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}
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Printf("ERROR: Unknown flag: '%s'\n", name);
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return false;
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}
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void FlagParser::RegisterHandler(const char *name, FlagHandlerBase *handler,
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const char *desc) {
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CHECK(n_flags_ < kMaxFlags);
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flags_[n_flags_].name = name;
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flags_[n_flags_].desc = desc;
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flags_[n_flags_].handler = handler;
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++n_flags_;
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}
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FlagParser::FlagParser() : n_flags_(0), buf_(nullptr), pos_(0) {
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flags_ = (Flag *)InternalAlloc(sizeof(Flag) * kMaxFlags);
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}
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FlagParser::~FlagParser() {
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for (int i = 0; i < n_flags_; ++i)
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InternalFree(flags_[i].handler);
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InternalFree(flags_);
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}
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} // namespace __sanitizer
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