diff options
Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info.cc')
| -rw-r--r-- | toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info.cc | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info.cc b/toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info.cc deleted file mode 100644 index 0c4af7ba8..000000000 --- a/toolkit/crashreporter/google-breakpad/src/processor/cfi_frame_info.cc +++ /dev/null @@ -1,186 +0,0 @@ -// Copyright (c) 2010, Google Inc. -// All rights reserved. -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following disclaimer -// in the documentation and/or other materials provided with the -// distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived from -// this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -// Original author: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com> - -// cfi_frame_info.cc: Implementation of CFIFrameInfo class. -// See cfi_frame_info.h for details. - -#include "processor/cfi_frame_info.h" - -#include <string.h> - -#include <sstream> - -#include "common/scoped_ptr.h" -#include "processor/postfix_evaluator-inl.h" - -namespace google_breakpad { - -#ifdef _MSC_VER -#define strtok_r strtok_s -#endif - -template<typename V> -bool CFIFrameInfo::FindCallerRegs(const RegisterValueMap<V> ®isters, - const MemoryRegion &memory, - RegisterValueMap<V> *caller_registers) const { - // If there are not rules for both .ra and .cfa in effect at this address, - // don't use this CFI data for stack walking. - if (cfa_rule_.empty() || ra_rule_.empty()) - return false; - - RegisterValueMap<V> working; - PostfixEvaluator<V> evaluator(&working, &memory); - - caller_registers->clear(); - - // First, compute the CFA. - V cfa; - working = registers; - if (!evaluator.EvaluateForValue(cfa_rule_, &cfa)) - return false; - - // Then, compute the return address. - V ra; - working = registers; - working[".cfa"] = cfa; - if (!evaluator.EvaluateForValue(ra_rule_, &ra)) - return false; - - // Now, compute values for all the registers register_rules_ mentions. - for (RuleMap::const_iterator it = register_rules_.begin(); - it != register_rules_.end(); it++) { - V value; - working = registers; - working[".cfa"] = cfa; - if (!evaluator.EvaluateForValue(it->second, &value)) - return false; - (*caller_registers)[it->first] = value; - } - - (*caller_registers)[".ra"] = ra; - (*caller_registers)[".cfa"] = cfa; - - return true; -} - -// Explicit instantiations for 32-bit and 64-bit architectures. -template bool CFIFrameInfo::FindCallerRegs<uint32_t>( - const RegisterValueMap<uint32_t> ®isters, - const MemoryRegion &memory, - RegisterValueMap<uint32_t> *caller_registers) const; -template bool CFIFrameInfo::FindCallerRegs<uint64_t>( - const RegisterValueMap<uint64_t> ®isters, - const MemoryRegion &memory, - RegisterValueMap<uint64_t> *caller_registers) const; - -string CFIFrameInfo::Serialize() const { - std::ostringstream stream; - - if (!cfa_rule_.empty()) { - stream << ".cfa: " << cfa_rule_; - } - if (!ra_rule_.empty()) { - if (static_cast<std::streamoff>(stream.tellp()) != 0) - stream << " "; - stream << ".ra: " << ra_rule_; - } - for (RuleMap::const_iterator iter = register_rules_.begin(); - iter != register_rules_.end(); - ++iter) { - if (static_cast<std::streamoff>(stream.tellp()) != 0) - stream << " "; - stream << iter->first << ": " << iter->second; - } - - return stream.str(); -} - -bool CFIRuleParser::Parse(const string &rule_set) { - size_t rule_set_len = rule_set.size(); - scoped_array<char> working_copy(new char[rule_set_len + 1]); - memcpy(working_copy.get(), rule_set.data(), rule_set_len); - working_copy[rule_set_len] = '\0'; - - name_.clear(); - expression_.clear(); - - char *cursor; - static const char token_breaks[] = " \t\r\n"; - char *token = strtok_r(working_copy.get(), token_breaks, &cursor); - - for (;;) { - // End of rule set? - if (!token) return Report(); - - // Register/pseudoregister name? - size_t token_len = strlen(token); - if (token_len >= 1 && token[token_len - 1] == ':') { - // Names can't be empty. - if (token_len < 2) return false; - // If there is any pending content, report it. - if (!name_.empty() || !expression_.empty()) { - if (!Report()) return false; - } - name_.assign(token, token_len - 1); - expression_.clear(); - } else { - // Another expression component. - assert(token_len > 0); // strtok_r guarantees this, I think. - if (!expression_.empty()) - expression_ += ' '; - expression_ += token; - } - token = strtok_r(NULL, token_breaks, &cursor); - } -} - -bool CFIRuleParser::Report() { - if (name_.empty() || expression_.empty()) return false; - if (name_ == ".cfa") handler_->CFARule(expression_); - else if (name_ == ".ra") handler_->RARule(expression_); - else handler_->RegisterRule(name_, expression_); - return true; -} - -void CFIFrameInfoParseHandler::CFARule(const string &expression) { - frame_info_->SetCFARule(expression); -} - -void CFIFrameInfoParseHandler::RARule(const string &expression) { - frame_info_->SetRARule(expression); -} - -void CFIFrameInfoParseHandler::RegisterRule(const string &name, - const string &expression) { - frame_info_->SetRegisterRule(name, expression); -} - -} // namespace google_breakpad |