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// 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.
// NetworkSourceLineServer implements a UDP-based network protocol
// to allow clients to query for source line information.
//
// A brief protocol description can be found in network_source_line_protocol.h
#ifndef GOOGLE_BREAKPAD_PROCESSOR_NETWORK_SOURCE_LINE_SERVER_H_
#define GOOGLE_BREAKPAD_PROCESSOR_NETWORK_SOURCE_LINE_SERVER_H_
#include <list>
#include <string>
#include <vector>
#include "google_breakpad/common/breakpad_types.h"
#include "google_breakpad/processor/basic_source_line_resolver.h"
#include "google_breakpad/processor/symbol_supplier.h"
#include "processor/binarystream.h"
#include "processor/network_interface.h"
#include "processor/udp_network.h"
namespace google_breakpad {
using std::list;
using std::string;
using std::vector;
class NetworkSourceLineServer {
public:
explicit NetworkSourceLineServer(SymbolSupplier *supplier,
SourceLineResolverInterface *resolver,
unsigned short listen_port,
bool ip4only,
const string &listen_address,
u_int64_t max_symbol_lines)
: initialized_(false),
net_(new UDPNetwork(listen_address, listen_port, ip4only)),
resolver_(resolver),
supplier_(supplier),
max_symbol_lines_(max_symbol_lines),
symbol_lines_(0) {};
NetworkSourceLineServer(SymbolSupplier *supplier,
SourceLineResolverInterface *resolver,
NetworkInterface *net,
u_int64_t max_symbol_lines = 0)
: initialized_(false),
net_(net),
resolver_(resolver),
supplier_(supplier),
max_symbol_lines_(max_symbol_lines),
symbol_lines_(0) {};
// Initialize network connection. Will be called automatically by
// RunOnce or RunForever if not already initialized.
// Returns false if network setup fails.
bool Initialize();
// Run forever serving connections.
// Returns false only if network setup fails.
bool RunForever();
// Look for incoming connections and serve them.
// Wait at most |wait_milliseconds| before returning. Return true
// if any connections were served, and false otherwise.
bool RunOnce(int wait_milliseconds);
private:
bool initialized_;
NetworkInterface *net_;
SourceLineResolverInterface *resolver_;
SymbolSupplier *supplier_;
// Maximum number of symbol lines to store in memory.
// The number of lines in a symbol file is used as a rough
// proxy for memory usage when parsed and loaded. When
// this limit is surpassed, modules will be unloaded until
// the sum of currently loaded modules is again lower
// than this limit.
const u_int64_t max_symbol_lines_;
// Current number of symbol lines loaded
u_int64_t symbol_lines_;
// List of modules loaded, in most-to-least recently used order
list<string> modules_used_;
// Number of symbol lines loaded, per module.
map<string, int> module_symbol_lines_;
void HandleHas(binarystream &message, binarystream &response);
void HandleLoad(binarystream &message, binarystream &response);
void HandleGet(binarystream &message, binarystream &response);
void HandleGetStackWin(binarystream &message, binarystream &response);
void HandleGetStackCFI(binarystream &message, binarystream &response);
string FormatWindowsFrameInfo(WindowsFrameInfo *frame_info);
int CountNewlines(const string &str);
// Move this module to the front of the used list.
void UsedModule(const CodeModule &module);
// Try to unload some modules to reclaim memory.
// Do not unload the module passed in, as this was just loaded.
void TryUnloadModules(const CodeModule &just_loaded_module);
protected:
// protected so we can easily unit test it
bool HandleRequest(binarystream &request, binarystream &response);
};
} // namespace google_breakpad
#endif // GOOGLE_BREAKPAD_PROCESSOR_NETWORK_SOURCE_LINE_SERVER_H_
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