Store and log full stack traces for leaked memory allocations

Don't dump stack backtrace when logging memory leaks to a file

Since the backtrace goes to the console instead, it's confusing to have them in
different places.

(cherry picked from commit 6e7df4d)
(cherry picked from commit 270cd1f)
(cherry picked from commit c627e95)

lib/common/DebugMemLeakFinder.cpp

@@ -20,6 +20,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#ifdef HAVE_EXECINFO_H
+	#include <execinfo.h>
+#endif
+
 #ifdef HAVE_PROCESS_H
 #	include <process.h>
 #endif
@@ -33,6 +37,7 @@
 #include <set>
 
 #include "MemLeakFinder.h"
+#include "Utils.h"
 
 static bool memleakfinder_initialised = false;
 bool memleakfinder_global_enable = false;
@@ -42,6 +47,10 @@ typedef struct
 	size_t size;
 	const char *file;
 	int line;
+#if !defined BOX_RELEASE_BUILD && defined HAVE_EXECINFO_H
+	void  *stack_frames[20];
+	size_t stack_size;
+#endif
 } MallocBlockInfo;
 
 typedef struct
@@ -50,6 +59,10 @@ typedef struct
 	const char *file;
 	int line;
 	bool array;
+#if !defined BOX_RELEASE_BUILD && defined HAVE_EXECINFO_H
+	void  *stack_frames[20];
+	size_t stack_size;
+#endif
 } ObjectInfo;
 
 namespace
@@ -544,6 +557,13 @@ void memleakfinder_reportleaks_file(FILE *file)
 				"%s:%d\n", i->second.array?" []":"",
 				i->first, (unsigned long)i->second.size, i->second.file,
 				i->second.line);
+#if !defined BOX_RELEASE_BUILD && defined HAVE_EXECINFO_H
+			if(file == stdout)
+			{
+				DumpStackBacktrace(BOX_CURRENT_FILE, i->second.stack_size,
+					i->second.stack_frames);
+			}
+#endif
 		}
 	}
 }
@@ -628,6 +648,9 @@ void add_object_block(void *block, size_t size, const char *file, int line, bool
 		i.file = file;
 		i.line = line;
 		i.array = array;
+#ifdef HAVE_EXECINFO_H
+		i.stack_size = backtrace(i.stack_frames, 20);
+#endif
 		sObjectBlocks[block] = i;
 
 		if(sTrackObjectsInSection)

lib/common/Utils.cpp

@@ -245,6 +245,9 @@ void DumpStackBacktrace(const std::string& filename, size_t size, void * const *
 	pInfo->SizeOfStruct = sizeof(SYMBOL_INFO);
 #endif
 
+void DumpStackBacktrace(size_t size, void * const * array)
+{
+#ifdef HAVE_EXECINFO_H
 	for(size_t i = 0; i < size; i++)
 	{
 		std::ostringstream output;
@@ -298,7 +301,7 @@ void DumpStackBacktrace(const std::string& filename, size_t size, void * const *
 	}
 }
 
-
+#include "MemLeakFindOn.h"
 
 // --------------------------------------------------------------------------
 //