1 files changed, 387 insertions, 0 deletions

diff --git a/toolkit/crashreporter/google-breakpad/src/common/module.cc b/toolkit/crashreporter/google-breakpad/src/common/module.cc
new file mode 100644
index 0000000000..a3544029cb
--- /dev/null
+++ b/toolkit/crashreporter/google-breakpad/src/common/module.cc
@@ -0,0 +1,387 @@
+// Copyright (c) 2011 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>
+
+// module.cc: Implement google_breakpad::Module.  See module.h.
+
+#include "common/module.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <iostream>
+#include <utility>
+
+namespace google_breakpad {
+
+using std::dec;
+using std::hex;
+
+
+Module::Module(const string &name, const string &os,
+               const string &architecture, const string &id,
+               const string &code_id /* = "" */) :
+    name_(name),
+    os_(os),
+    architecture_(architecture),
+    id_(id),
+    code_id_(code_id),
+    load_address_(0) { }
+
+Module::~Module() {
+  for (FileByNameMap::iterator it = files_.begin(); it != files_.end(); ++it)
+    delete it->second;
+  for (FunctionSet::iterator it = functions_.begin();
+       it != functions_.end(); ++it) {
+    delete *it;
+  }
+  for (StackFrameEntrySet::iterator it = stack_frame_entries_.begin();
+       it != stack_frame_entries_.end(); ++it) {
+    delete *it;
+  }
+  for (ExternSet::iterator it = externs_.begin(); it != externs_.end(); ++it)
+    delete *it;
+}
+
+void Module::SetLoadAddress(Address address) {
+  load_address_ = address;
+}
+
+void Module::SetAddressRanges(const vector<Range>& ranges) {
+  address_ranges_ = ranges;
+}
+
+void Module::AddFunction(Function *function) {
+  // FUNC lines must not hold an empty name, so catch the problem early if
+  // callers try to add one.
+  assert(!function->name.empty());
+
+  if (!AddressIsInModule(function->address)) {
+    return;
+  }
+
+  // FUNCs are better than PUBLICs as they come with sizes, so remove an extern
+  // with the same address if present.
+  Extern ext(function->address);
+  ExternSet::iterator it_ext = externs_.find(&ext);
+  if (it_ext == externs_.end() &&
+      architecture_ == "arm" &&
+      (function->address & 0x1) == 0) {
+    // ARM THUMB functions have bit 0 set. ARM64 does not have THUMB.
+    Extern arm_thumb_ext(function->address | 0x1);
+    it_ext = externs_.find(&arm_thumb_ext);
+  }
+  if (it_ext != externs_.end()) {
+    delete *it_ext;
+    externs_.erase(it_ext);
+  }
+#if _DEBUG
+  {
+    // There should be no other PUBLIC symbols that overlap with the function.
+    for (const Range& range : function->ranges) {
+      Extern debug_ext(range.address);
+      ExternSet::iterator it_debug = externs_.lower_bound(&ext);
+      assert(it_debug == externs_.end() ||
+             (*it_debug)->address >= range.address + range.size);
+    }
+  }
+#endif
+
+  std::pair<FunctionSet::iterator,bool> ret = functions_.insert(function);
+  if (!ret.second && (*ret.first != function)) {
+    // Free the duplicate that was not inserted because this Module
+    // now owns it.
+    delete function;
+  }
+}
+
+void Module::AddFunctions(vector<Function *>::iterator begin,
+                          vector<Function *>::iterator end) {
+  for (vector<Function *>::iterator it = begin; it != end; ++it)
+    AddFunction(*it);
+}
+
+void Module::AddStackFrameEntry(StackFrameEntry* stack_frame_entry) {
+  if (!AddressIsInModule(stack_frame_entry->address)) {
+    return;
+  }
+
+  std::pair<StackFrameEntrySet::iterator,bool> ret =
+      stack_frame_entries_.insert(stack_frame_entry);
+  if (!ret.second) {
+    // Free the duplicate that was not inserted because this Module
+    // now owns it.
+    delete stack_frame_entry;
+  }
+}
+
+void Module::AddExtern(Extern *ext) {
+  if (!AddressIsInModule(ext->address)) {
+    return;
+  }
+
+  std::pair<ExternSet::iterator,bool> ret = externs_.insert(ext);
+  if (!ret.second) {
+    // Free the duplicate that was not inserted because this Module
+    // now owns it.
+    delete ext;
+  }
+}
+
+void Module::GetFunctions(vector<Function *> *vec,
+                          vector<Function *>::iterator i) {
+  vec->insert(i, functions_.begin(), functions_.end());
+}
+
+void Module::GetExterns(vector<Extern *> *vec,
+                        vector<Extern *>::iterator i) {
+  vec->insert(i, externs_.begin(), externs_.end());
+}
+
+Module::File *Module::FindFile(const string &name) {
+  // A tricky bit here.  The key of each map entry needs to be a
+  // pointer to the entry's File's name string.  This means that we
+  // can't do the initial lookup with any operation that would create
+  // an empty entry for us if the name isn't found (like, say,
+  // operator[] or insert do), because such a created entry's key will
+  // be a pointer the string passed as our argument.  Since the key of
+  // a map's value type is const, we can't fix it up once we've
+  // created our file.  lower_bound does the lookup without doing an
+  // insertion, and returns a good hint iterator to pass to insert.
+  // Our "destiny" is where we belong, whether we're there or not now.
+  FileByNameMap::iterator destiny = files_.lower_bound(&name);
+  if (destiny == files_.end()
+      || *destiny->first != name) {  // Repeated string comparison, boo hoo.
+    File *file = new File(name);
+    file->source_id = -1;
+    destiny = files_.insert(destiny,
+                            FileByNameMap::value_type(&file->name, file));
+  }
+  return destiny->second;
+}
+
+Module::File *Module::FindFile(const char *name) {
+  string name_string = name;
+  return FindFile(name_string);
+}
+
+Module::File *Module::FindExistingFile(const string &name) {
+  FileByNameMap::iterator it = files_.find(&name);
+  return (it == files_.end()) ? NULL : it->second;
+}
+
+void Module::GetFiles(vector<File *> *vec) {
+  vec->clear();
+  for (FileByNameMap::iterator it = files_.begin(); it != files_.end(); ++it)
+    vec->push_back(it->second);
+}
+
+void Module::GetStackFrameEntries(vector<StackFrameEntry*>* vec) const {
+  vec->clear();
+  vec->insert(vec->begin(), stack_frame_entries_.begin(),
+              stack_frame_entries_.end());
+}
+
+Module::StackFrameEntry* Module::FindStackFrameEntryByAddress(Address address) {
+  StackFrameEntry search;
+  search.address = address;
+  StackFrameEntrySet::iterator it = stack_frame_entries_.upper_bound(&search);
+
+  if (it == stack_frame_entries_.begin())
+    return NULL;
+
+  it--;
+  if ((*it)->address <= address && address < (*it)->address + (*it)->size)
+    return *it;
+
+  return NULL;
+}
+
+void Module::AssignSourceIds() {
+  // First, give every source file an id of -1.
+  for (FileByNameMap::iterator file_it = files_.begin();
+       file_it != files_.end(); ++file_it) {
+    file_it->second->source_id = -1;
+  }
+
+  // Next, mark all files actually cited by our functions' line number
+  // info, by setting each one's source id to zero.
+  for (FunctionSet::const_iterator func_it = functions_.begin();
+       func_it != functions_.end(); ++func_it) {
+    Function *func = *func_it;
+    for (vector<Line>::iterator line_it = func->lines.begin();
+         line_it != func->lines.end(); ++line_it)
+      line_it->file->source_id = 0;
+  }
+
+  // Finally, assign source ids to those files that have been marked.
+  // We could have just assigned source id numbers while traversing
+  // the line numbers, but doing it this way numbers the files in
+  // lexicographical order by name, which is neat.
+  int next_source_id = 0;
+  for (FileByNameMap::iterator file_it = files_.begin();
+       file_it != files_.end(); ++file_it) {
+    if (!file_it->second->source_id)
+      file_it->second->source_id = next_source_id++;
+  }
+}
+
+bool Module::ReportError() {
+  fprintf(stderr, "error writing symbol file: %s\n",
+          strerror(errno));
+  return false;
+}
+
+bool Module::WriteRuleMap(const RuleMap &rule_map, std::ostream &stream) {
+  for (RuleMap::const_iterator it = rule_map.begin();
+       it != rule_map.end(); ++it) {
+    if (it != rule_map.begin())
+      stream << ' ';
+    stream << it->first << ": " << it->second;
+  }
+  return stream.good();
+}
+
+bool Module::AddressIsInModule(Address address) const {
+  if (address_ranges_.empty()) {
+    return true;
+  }
+  for (const auto& segment : address_ranges_) {
+    if (address >= segment.address &&
+        address < segment.address + segment.size) {
+      return true;
+    }
+  }
+  return false;
+}
+
+bool Module::Write(std::ostream &stream, SymbolData symbol_data) {
+  stream << "MODULE " << os_ << " " << architecture_ << " "
+         << id_ << " " << name_ << "\n";
+  if (!stream.good())
+    return ReportError();
+
+  if (!code_id_.empty()) {
+    stream << "INFO CODE_ID " << code_id_ << "\n";
+  }
+
+  if (symbol_data != ONLY_CFI) {
+    AssignSourceIds();
+
+    // Write out files.
+    for (FileByNameMap::iterator file_it = files_.begin();
+         file_it != files_.end(); ++file_it) {
+      File *file = file_it->second;
+      if (file->source_id >= 0) {
+        stream << "FILE " << file->source_id << " " <<  file->name << "\n";
+        if (!stream.good())
+          return ReportError();
+      }
+    }
+
+    // Write out functions and their lines.
+    for (FunctionSet::const_iterator func_it = functions_.begin();
+         func_it != functions_.end(); ++func_it) {
+      Function *func = *func_it;
+      vector<Line>::iterator line_it = func->lines.begin();
+      for (auto range_it = func->ranges.cbegin();
+           range_it != func->ranges.cend(); ++range_it) {
+        stream << "FUNC " << hex
+               << (range_it->address - load_address_) << " "
+               << range_it->size << " "
+               << func->parameter_size << " "
+               << func->name << dec << "\n";
+
+        if (!stream.good())
+          return ReportError();
+
+        while ((line_it != func->lines.end()) &&
+               (line_it->address >= range_it->address) &&
+               (line_it->address < (range_it->address + range_it->size))) {
+          stream << hex
+                 << (line_it->address - load_address_) << " "
+                 << line_it->size << " "
+                 << dec
+                 << line_it->number << " "
+                 << line_it->file->source_id << "\n";
+
+          if (!stream.good())
+            return ReportError();
+
+          ++line_it;
+        }
+      }
+    }
+
+    // Write out 'PUBLIC' records.
+    for (ExternSet::const_iterator extern_it = externs_.begin();
+         extern_it != externs_.end(); ++extern_it) {
+      Extern *ext = *extern_it;
+      stream << "PUBLIC " << hex
+             << (ext->address - load_address_) << " 0 "
+             << ext->name << dec << "\n";
+    }
+  }
+
+  if (symbol_data != NO_CFI) {
+    // Write out 'STACK CFI INIT' and 'STACK CFI' records.
+    StackFrameEntrySet::const_iterator frame_it;
+    for (frame_it = stack_frame_entries_.begin();
+         frame_it != stack_frame_entries_.end(); ++frame_it) {
+      StackFrameEntry *entry = *frame_it;
+      stream << "STACK CFI INIT " << hex
+             << (entry->address - load_address_) << " "
+             << entry->size << " " << dec;
+      if (!stream.good()
+          || !WriteRuleMap(entry->initial_rules, stream))
+        return ReportError();
+
+      stream << "\n";
+
+      // Write out this entry's delta rules as 'STACK CFI' records.
+      for (RuleChangeMap::const_iterator delta_it = entry->rule_changes.begin();
+           delta_it != entry->rule_changes.end(); ++delta_it) {
+        stream << "STACK CFI " << hex
+               << (delta_it->first - load_address_) << " " << dec;
+        if (!stream.good()
+            || !WriteRuleMap(delta_it->second, stream))
+          return ReportError();
+
+        stream << "\n";
+      }
+    }
+  }
+
+  return true;
+}
+
+}  // namespace google_breakpad