1 files changed, 106 insertions, 0 deletions
diff --git a/src/mongo/util/debug_util.h b/src/mongo/util/debug_util.h
new file mode 100644
index 00000000000..abed8d94924
--- /dev/null
+++ b/src/mongo/util/debug_util.h
@@ -0,0 +1,106 @@
+// debug_util.h
+
+/*    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.
+ */
+
+#pragma once
+
+#ifndef _WIN32
+#include <signal.h>
+#endif
+
+namespace mongo {
+
+// for debugging
+    typedef struct _Ints {
+        int i[100];
+    } *Ints;
+    typedef struct _Chars {
+        char c[200];
+    } *Chars;
+
+    typedef char CHARS[400];
+
+    typedef struct _OWS {
+        int size;
+        char type;
+        char string[400];
+    } *OWS;
+
+#if defined(_DEBUG)
+    enum {DEBUG_BUILD = 1};
+#else
+    enum {DEBUG_BUILD = 0};
+#endif
+
+#define MONGO_DEV if( DEBUG_BUILD )
+#define DEV MONGO_DEV
+
+#define MONGO_DEBUGGING if( 0 )
+#define DEBUGGING MONGO_DEBUGGING
+
+// The following declare one unique counter per enclosing function.
+// NOTE The implementation double-increments on a match, but we don't really care.
+#define MONGO_SOMETIMES( occasion, howOften ) for( static unsigned occasion = 0; ++occasion % howOften == 0; )
+#define SOMETIMES MONGO_SOMETIMES
+
+#define MONGO_OCCASIONALLY SOMETIMES( occasionally, 16 )
+#define OCCASIONALLY MONGO_OCCASIONALLY
+
+#define MONGO_RARELY SOMETIMES( rarely, 128 )
+#define RARELY MONGO_RARELY
+
+#define MONGO_ONCE for( static bool undone = true; undone; undone = false )
+#define ONCE MONGO_ONCE
+
+#if defined(_WIN32)
+    inline int strcasecmp(const char* s1, const char* s2) {return _stricmp(s1, s2);}
+#endif
+
+    // Sets SIGTRAP handler to launch GDB
+    // Noop unless on *NIX and compiled with _DEBUG
+    void setupSIGTRAPforGDB();
+
+    extern int tlogLevel;
+
+    inline void breakpoint() {
+        if ( tlogLevel < 0 )
+            return;
+#ifdef _WIN32
+        //DEV DebugBreak();
+#endif
+#ifndef _WIN32
+        // code to raise a breakpoint in GDB
+        ONCE {
+            //prevent SIGTRAP from crashing the program if default action is specified and we are not in gdb
+            struct sigaction current;
+            sigaction(SIGTRAP, NULL, &current);
+            if (current.sa_handler == SIG_DFL) {
+                signal(SIGTRAP, SIG_IGN);
+            }
+        }
+
+        raise(SIGTRAP);
+#endif
+    }
+
+
+    // conditional breakpoint
+    inline void breakif(bool test) {
+        if (test)
+            breakpoint();
+    }
+
+} // namespace mongo