Merge branch 'master' of git@github.com:mongodb/mongo

SConstruct

@@ -278,7 +278,7 @@ if GetOption( "extralib" ) is not None:
 
 commonFiles = Split( "stdafx.cpp buildinfo.cpp db/jsobj.cpp db/json.cpp db/commands.cpp db/lasterror.cpp db/nonce.cpp db/queryutil.cpp shell/mongo.cpp" )
 commonFiles += [ "util/background.cpp" , "util/mmap.cpp" ,  "util/sock.cpp" ,  "util/util.cpp" , "util/message.cpp" , 
-                 "util/assert_util.cpp" , "util/httpclient.cpp" , "util/md5main.cpp" , "util/base64.cpp" ]
+                 "util/assert_util.cpp" , "util/httpclient.cpp" , "util/md5main.cpp" , "util/base64.cpp", "util/debug_util.cpp"  ]
 commonFiles += Glob( "util/*.c" )
 commonFiles += Split( "client/connpool.cpp client/dbclient.cpp client/model.cpp client/parallel.cpp" )
 commonFiles += [ "scripting/engine.cpp" ]

db/db.cpp

@@ -956,32 +956,6 @@ namespace mongo {
         exitCleanly();
     }
 
-    /* Magic gdb trampoline
-     * Assumptions:
-     *  1) gdbserver is on your path
-     *  2) You have run "handle SIGSTOP noprint" in gdb
-     *  3) cmdLine.port + 2000 is free
-     */
-    void launchGDB(int){
-        // Don't come back here
-        signal(SIGTRAP, SIG_IGN);
-
-        int newPort = cmdLine.port + 2000;
-        string newPortStr = "localhost:" + BSONObjBuilder::numStr(newPort);
-        string pidToDebug = BSONObjBuilder::numStr(getpid());
-
-        cout << "\n\n\t**** Launching gdbserver on " << newPortStr << " ****" << endl << endl;
-        if (fork() == 0){
-            //child
-            execlp("gdbserver", "gdbserver", "--attach", newPortStr.c_str(), pidToDebug.c_str(), NULL);
-            perror(NULL);
-        }else{
-            //parent
-            raise(SIGSTOP); // pause all threads until gdb connects and continues
-            raise(SIGTRAP); // break inside gdbserver
-        }
-    }
-
     void setupSignals() {
         assert( signal(SIGSEGV, abruptQuit) != SIG_ERR );
         assert( signal(SIGFPE, abruptQuit) != SIG_ERR );
@@ -990,10 +964,7 @@ namespace mongo {
         assert( signal(SIGPIPE, pipeSigHandler) != SIG_ERR );
         assert( signal(SIGUSR1 , rotateLogs ) != SIG_ERR );
 
-#ifdef _DEBUG //build with scons --dd to get this flag
-        // if running in gdb we never get this signal
-        assert( signal(SIGTRAP , launchGDB ) != SIG_ERR );
-#endif
+        setupSIGTRAPforGDB();
 
         sigemptyset( &asyncSignals );
         sigaddset( &asyncSignals, SIGINT );

db/jsobj.h

@@ -1117,6 +1117,7 @@ namespace mongo {
 
         /** append an element but with a new name */
         void appendAs(const BSONElement& e, const char *as) {
+            assert( !e.eoo() ); // do not append eoo, that would corrupt us. the builder auto appends when done() is called.
             b.append((char) e.type());
             b.append(as);
             b.append((void *) e.value(), e.valuesize());

s/server.cpp

@@ -92,6 +92,7 @@ namespace mongo {
     
     void init(){
         serverID.init();
+        setupSIGTRAPforGDB();
     }
 
     void start() {

util/debug_util.cpp

@@ -0,0 +1,59 @@
+// debug_util.cpp
+
+/*    Copyright 2009 10gen Inc.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+#include "stdafx.h"
+#include "../db/cmdline.h"
+#include "../db/jsobj.h"
+
+namespace mongo {
+
+#if defined(_DEBUG) && !defined(_WIN32)
+    /* Magic gdb trampoline
+     * Do not call directly! call setupSIGTRAPforGDB()
+     * Assumptions:
+     *  1) gdbserver is on your path
+     *  2) You have run "handle SIGSTOP noprint" in gdb
+     *  3) cmdLine.port + 2000 is free
+     */
+    void launchGDB(int){
+        // Don't come back here
+        signal(SIGTRAP, SIG_IGN);
+
+        int newPort = cmdLine.port + 2000;
+        string newPortStr = "localhost:" + BSONObjBuilder::numStr(newPort);
+        string pidToDebug = BSONObjBuilder::numStr(getpid());
+
+        cout << "\n\n\t**** Launching gdbserver on " << newPortStr << " ****" << endl << endl;
+        if (fork() == 0){
+            //child
+            execlp("gdbserver", "gdbserver", "--attach", newPortStr.c_str(), pidToDebug.c_str(), NULL);
+            perror(NULL);
+        }else{
+            //parent
+            raise(SIGSTOP); // pause all threads until gdb connects and continues
+            raise(SIGTRAP); // break inside gdbserver
+        }
+    }
+
+    void setupSIGTRAPforGDB(){
+        assert( signal(SIGTRAP , launchGDB ) != SIG_ERR );
+    }
+#else
+    void setupSIGTRAPforGDB() {
+    }
+#endif
+}

util/debug_util.h

@@ -66,6 +66,10 @@ namespace mongo {
 #define strcasecmp _stricmp
 #endif
 
+    // Sets SIGTRAP handler to launch GDB
+    // Noop unless on *NIX and compiled with _DEBUG
+    void setupSIGTRAPforGDB();
+
 #if defined(_WIN32)
     inline void breakpoint() {} //noop
 #else // defined(_WIN32)