* Added breakpad support for Linux.

thirdparty/breakpad/common/dwarf_line_to_module.cc

@@ -0,0 +1,134 @@
+// 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>
+
+// dwarf_line_to_module.cc: Implementation of DwarfLineToModule class.
+// See dwarf_line_to_module.h for details. 
+
+#include "common/dwarf_line_to_module.h"
+
+#include <stdio.h>
+
+// Trying to support Windows paths in a reasonable way adds a lot of
+// variations to test; it would be better to just put off dealing with
+// it until we actually have to deal with DWARF on Windows.
+
+// Return true if PATH is an absolute path, false if it is relative.
+static bool PathIsAbsolute(const string &path) {
+  return (path.size() >= 1 && path[0] == '/');
+}
+
+// If PATH is an absolute path, return PATH.  If PATH is a relative path,
+// treat it as relative to BASE and return the combined path.
+static string ExpandPath(const string &path, const string &base) {
+  if (PathIsAbsolute(path))
+    return path;
+  return base + "/" + path;
+}
+
+namespace google_breakpad {
+
+void DwarfLineToModule::DefineDir(const string &name, uint32 dir_num) {
+  // Directory number zero is reserved to mean the compilation
+  // directory. Silently ignore attempts to redefine it.
+  if (dir_num != 0)
+    directories_[dir_num] = name;
+}
+
+void DwarfLineToModule::DefineFile(const string &name, int32 file_num,
+                                   uint32 dir_num, uint64 mod_time,
+                                   uint64 length) {
+  if (file_num == -1)
+    file_num = ++highest_file_number_;
+  else if (file_num > highest_file_number_)
+    highest_file_number_ = file_num;
+
+  std::string full_name;
+  if (dir_num != 0) {
+    DirectoryTable::const_iterator directory_it = directories_.find(dir_num);
+    if (directory_it != directories_.end()) {
+      full_name = ExpandPath(name, directory_it->second);
+    } else {
+      if (!warned_bad_directory_number_) {
+        fprintf(stderr, "warning: DWARF line number data refers to undefined"
+                " directory numbers\n");
+        warned_bad_directory_number_ = true;
+      }
+      full_name = name; // just treat name as relative
+    }
+  } else {
+    // Directory number zero is the compilation directory; we just report
+    // relative paths in that case.
+    full_name = name;
+  }
+
+  // Find a Module::File object of the given name, and add it to the
+  // file table.
+  files_[file_num] = module_->FindFile(full_name);
+}
+
+void DwarfLineToModule::AddLine(uint64 address, uint64 length,
+                                uint32 file_num, uint32 line_num,
+                                uint32 column_num) {
+  if (length == 0)
+    return;
+
+  // Clip lines not to extend beyond the end of the address space.
+  if (address + length < address)
+    length = -address;
+
+  // Should we omit this line? (See the comments for omitted_line_end_.)
+  if (address == 0 || address == omitted_line_end_) {
+    omitted_line_end_ = address + length;
+    return;
+  } else {
+    omitted_line_end_ = 0;
+  }
+
+  // Find the source file being referred to.
+  Module::File *file = files_[file_num];
+  if (!file) {
+    if (!warned_bad_file_number_) {
+      fprintf(stderr, "warning: DWARF line number data refers to "
+              "undefined file numbers\n");
+      warned_bad_file_number_ = true;
+    }
+    return;
+  }
+  Module::Line line;
+  line.address = address;
+  // We set the size when we get the next line or the EndSequence call.
+  line.size = length;
+  line.file = file;
+  line.number = line_num;
+  lines_->push_back(line);
+}
+
+} // namespace google_breakpad