1 files changed, 231 insertions, 0 deletions
diff --git a/3rdParty/Breakpad/src/common/dwarf/functioninfo.cc b/3rdParty/Breakpad/src/common/dwarf/functioninfo.cc
new file mode 100644
index 0000000..55a255e
--- /dev/null
+++ b/3rdParty/Breakpad/src/common/dwarf/functioninfo.cc
@@ -0,0 +1,231 @@
+// 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;
+      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