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60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// debug_util.cpp
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/* Copyright 2009 10gen Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stdafx.h"
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#include "../db/cmdline.h"
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#include "../db/jsobj.h"
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namespace mongo {
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#if defined(USE_GDBSERVER)
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/* Magic gdb trampoline
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* Do not call directly! call setupSIGTRAPforGDB()
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* Assumptions:
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* 1) gdbserver is on your path
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* 2) You have run "handle SIGSTOP noprint" in gdb
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* 3) cmdLine.port + 2000 is free
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*/
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void launchGDB(int){
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// Don't come back here
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signal(SIGTRAP, SIG_IGN);
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int newPort = cmdLine.port + 2000;
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string newPortStr = "localhost:" + BSONObjBuilder::numStr(newPort);
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string pidToDebug = BSONObjBuilder::numStr(getpid());
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cout << "\n\n\t**** Launching gdbserver on " << newPortStr << " ****" << endl << endl;
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if (fork() == 0){
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//child
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execlp("gdbserver", "gdbserver", "--attach", newPortStr.c_str(), pidToDebug.c_str(), NULL);
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perror(NULL);
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}else{
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//parent
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raise(SIGSTOP); // pause all threads until gdb connects and continues
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raise(SIGTRAP); // break inside gdbserver
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}
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}
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void setupSIGTRAPforGDB(){
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assert( signal(SIGTRAP , launchGDB ) != SIG_ERR );
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}
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#else
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void setupSIGTRAPforGDB() {
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}
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#endif
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}
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