summaryrefslogtreecommitdiffstats
path: root/toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc
diff options
context:
space:
mode:
Diffstat (limited to 'toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc')
-rw-r--r--toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc234
1 files changed, 234 insertions, 0 deletions
diff --git a/toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc b/toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc
new file mode 100644
index 0000000000..ee198fc5d2
--- /dev/null
+++ b/toolkit/crashreporter/google-breakpad/src/common/dwarf/functioninfo.cc
@@ -0,0 +1,234 @@
+// 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.
+
+// This is a client for the dwarf2reader to extract function and line
+// information from the debug info.
+
+#include <assert.h>
+#include <limits.h>
+#include <stdio.h>
+
+#include <map>
+#include <queue>
+#include <vector>
+
+#include "common/dwarf/functioninfo.h"
+#include "common/dwarf/bytereader.h"
+#include "common/scoped_ptr.h"
+#include "common/using_std_string.h"
+
+using google_breakpad::scoped_ptr;
+
+namespace dwarf2reader {
+
+CULineInfoHandler::CULineInfoHandler(std::vector<SourceFileInfo>* files,
+ std::vector<string>* dirs,
+ LineMap* linemap):linemap_(linemap),
+ files_(files),
+ dirs_(dirs) {
+ // The dirs and files are 1 indexed, so just make sure we put
+ // nothing in the 0 vector.
+ assert(dirs->size() == 0);
+ assert(files->size() == 0);
+ dirs->push_back("");
+ SourceFileInfo s;
+ s.name = "";
+ s.lowpc = ULLONG_MAX;
+ files->push_back(s);
+}
+
+void CULineInfoHandler::DefineDir(const string& name, uint32 dir_num) {
+ // These should never come out of order, actually
+ assert(dir_num == dirs_->size());
+ dirs_->push_back(name);
+}
+
+void CULineInfoHandler::DefineFile(const string& name,
+ int32 file_num, uint32 dir_num,
+ uint64 mod_time, uint64 length) {
+ assert(dir_num >= 0);
+ assert(dir_num < dirs_->size());
+
+ // These should never come out of order, actually.
+ if (file_num == (int32)files_->size() || file_num == -1) {
+ string dir = dirs_->at(dir_num);
+
+ SourceFileInfo s;
+ s.lowpc = ULLONG_MAX;
+
+ if (dir == "") {
+ s.name = name;
+ } else {
+ s.name = dir + "/" + name;
+ }
+
+ files_->push_back(s);
+ } else {
+ fprintf(stderr, "error in DefineFile");
+ }
+}
+
+void CULineInfoHandler::AddLine(uint64 address, uint64 length, uint32 file_num,
+ uint32 line_num, uint32 column_num) {
+ if (file_num < files_->size()) {
+ linemap_->insert(
+ std::make_pair(address,
+ std::make_pair(files_->at(file_num).name.c_str(),
+ line_num)));
+
+ if (address < files_->at(file_num).lowpc) {
+ files_->at(file_num).lowpc = address;
+ }
+ } else {
+ fprintf(stderr, "error in AddLine");
+ }
+}
+
+bool CUFunctionInfoHandler::StartCompilationUnit(uint64 offset,
+ uint8 address_size,
+ uint8 offset_size,
+ uint64 cu_length,
+ uint8 dwarf_version) {
+ current_compilation_unit_offset_ = offset;
+ return true;
+}
+
+
+// For function info, we only care about subprograms and inlined
+// subroutines. For line info, the DW_AT_stmt_list lives in the
+// compile unit tag.
+
+bool CUFunctionInfoHandler::StartDIE(uint64 offset, enum DwarfTag tag) {
+ switch (tag) {
+ case DW_TAG_subprogram:
+ case DW_TAG_inlined_subroutine: {
+ current_function_info_ = new FunctionInfo;
+ current_function_info_->lowpc = current_function_info_->highpc = 0;
+ current_function_info_->name = "";
+ current_function_info_->line = 0;
+ current_function_info_->file = "";
+ offset_to_funcinfo_->insert(std::make_pair(offset,
+ current_function_info_));
+ };
+ // FALLTHROUGH
+ case DW_TAG_compile_unit:
+ return true;
+ default:
+ return false;
+ }
+ return false;
+}
+
+// Only care about the name attribute for functions
+
+void CUFunctionInfoHandler::ProcessAttributeString(uint64 offset,
+ enum DwarfAttribute attr,
+ enum DwarfForm form,
+ const string &data) {
+ if (current_function_info_) {
+ if (attr == DW_AT_name)
+ current_function_info_->name = data;
+ else if (attr == DW_AT_MIPS_linkage_name)
+ current_function_info_->mangled_name = data;
+ }
+}
+
+void CUFunctionInfoHandler::ProcessAttributeUnsigned(uint64 offset,
+ enum DwarfAttribute attr,
+ enum DwarfForm form,
+ uint64 data) {
+ if (attr == DW_AT_stmt_list) {
+ SectionMap::const_iterator iter = sections_.find("__debug_line");
+ assert(iter != sections_.end());
+
+ scoped_ptr<LineInfo> lireader(new LineInfo(iter->second.first + data,
+ iter->second.second - data,
+ reader_, linehandler_));
+ lireader->Start();
+ } else if (current_function_info_) {
+ switch (attr) {
+ case DW_AT_low_pc:
+ current_function_info_->lowpc = data;
+ break;
+ case DW_AT_high_pc:
+ current_function_info_->highpc = data;
+ break;
+ case DW_AT_decl_line:
+ current_function_info_->line = data;
+ break;
+ case DW_AT_decl_file:
+ current_function_info_->file = files_->at(data).name;
+ break;
+ case DW_AT_ranges:
+ current_function_info_->ranges = data;
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+void CUFunctionInfoHandler::ProcessAttributeReference(uint64 offset,
+ enum DwarfAttribute attr,
+ enum DwarfForm form,
+ uint64 data) {
+ if (current_function_info_) {
+ switch (attr) {
+ case DW_AT_specification: {
+ // Some functions have a "specification" attribute
+ // which means they were defined elsewhere. The name
+ // attribute is not repeated, and must be taken from
+ // the specification DIE. Here we'll assume that
+ // any DIE referenced in this manner will already have
+ // been seen, but that's not really required by the spec.
+ FunctionMap::iterator iter = offset_to_funcinfo_->find(data);
+ if (iter != offset_to_funcinfo_->end()) {
+ current_function_info_->name = iter->second->name;
+ current_function_info_->mangled_name = iter->second->mangled_name;
+ } else {
+ // If you hit this, this code probably needs to be rewritten.
+ fprintf(stderr,
+ "Error: DW_AT_specification was seen before the referenced "
+ "DIE! (Looking for DIE at offset %08llx, in DIE at "
+ "offset %08llx)\n", data, offset);
+ }
+ break;
+ }
+ default:
+ break;
+ }
+ }
+}
+
+void CUFunctionInfoHandler::EndDIE(uint64 offset) {
+ if (current_function_info_ && current_function_info_->lowpc)
+ address_to_funcinfo_->insert(std::make_pair(current_function_info_->lowpc,
+ current_function_info_));
+}
+
+} // namespace dwarf2reader