Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdesdk@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 840 insertions, 0 deletions

diff --git a/kmtrace/ktrace.c b/kmtrace/ktrace.c
new file mode 100644
index 00000000..044a1d24
--- /dev/null
+++ b/kmtrace/ktrace.c
@@ -0,0 +1,840 @@
+/* More debugging hooks for `malloc'.
+   Copyright (C) 1991,92,93,94,96,97,98,99,2000 Free Software Foundation, Inc.
+		 Written April 2, 1991 by John Gilmore of Cygnus Support.
+		 Based on mcheck.c by Mike Haertel.
+		 Hacked by AK
+		 Cleanup and performance improvements by
+		 Chris Schlaeger <[email protected]>
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with this library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+
+   The author may be reached (Email) at the address [email protected],
+   or (US mail) as Mike Haertel c/o Free Software Foundation.
+*/
+
+#define MALLOC_HOOKS
+#define _GNU_SOURCE
+
+#include <pthread.h>
+#include <malloc.h>
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <execinfo.h>
+#include <unistd.h>
+
+#ifdef USE_IN_LIBIO
+# include <libio/iolibio.h>
+# define setvbuf(s, b, f, l) _IO_setvbuf (s, b, f, l)
+#endif
+
+/* This is the most important parameter. It should be set to two times
+ * the maximum number of mallocs the application uses at a time. Prime
+ * numbers are very good candidates for this value.  I added a list of
+ * some prime numbers for conveniance.
+ *
+ * 10007, 20011, 30013, 40031, 50033, 60037, 70039, 80051, 90053,
+ * 100057, 110059, 120067, 130069, 140071, 150077, 160079, 170081,
+ * 180097, 190121, 200131, 210139, 220141, 230143, 240151, 250153,
+ * 260171, 270191, 280199, 290201, 300221, 310223, 320237, 330241,
+ * 340261, 350281, 360287, 370373, 380377, 390389 */
+#define TR_CACHE_SIZE 100057
+
+/* The DELTA value is also a value for the maximum
+ * number of iterations during a positive free/realloc
+ * search. It must NOT divide TR_CACHE_SIZE without
+ * remainder! */
+#define DELTA 23
+
+/* The high and low mark control the flushing algorithm.  Whenever the
+ * hashtable reaches the high mark every DELTAth entry is written to
+ * disk until the low filling mark is reached. A hash table becomes
+ * very inefficient when it becomes filled to 50% or more. */
+#define TR_HIGH_MARK ((int) (TR_CACHE_SIZE * 0.5))
+#define TR_LOW_MARK ((int) (TR_HIGH_MARK - (TR_CACHE_SIZE / DELTA)))
+
+/* Maximum call stack depth. No checking for overflows
+ * is done. Adjust this value with care! */
+#define TR_BT_SIZE 100
+
+#define PROFILE 1
+
+/* The hash function. Since the smallest allocated block is probably
+ * not smaller than 8 bytes we ignore the last 3 LSBs. */
+#define HASHFUNC(a) (((((unsigned long) a) << 1) ^ \
+                     (((unsigned long) a) >> 3)) % \
+                     TR_CACHE_SIZE)
+
+#define TR_HASHTABLE_SIZE	9973
+
+#define TR_NONE		0
+#define TR_MALLOC	1
+#define TR_REALLOC	2
+#define TR_FREE		3
+
+#define TRACE_BUFFER_SIZE 512
+
+typedef struct
+{
+	void* ptr;
+	size_t size;
+	int bt_size;
+	void** bt;
+} tr_entry;
+
+typedef struct CallerNode
+{
+	void* funcAdr;
+	unsigned long mallocs;
+	unsigned long mallocsSum;
+	unsigned int noCallees;
+	unsigned int maxCallees;
+	struct CallerNode** callees;
+} CallerNode;
+
+void ktrace(void);
+void kuntrace(void);
+
+static void addAllocationToTree(void);
+
+static void tr_freehook __P ((void*, const void*));
+static void* tr_reallochook __P ((void*, size_t,
+									const void*));
+static void* tr_mallochook __P ((size_t, const void*));
+/* Old hook values.  */
+static void (*tr_old_free_hook) __P ((void* ptr, const void*));
+static void* (*tr_old_malloc_hook) __P ((size_t size,
+										   const void*));
+static void* (*tr_old_realloc_hook) __P ((void* ptr,
+											size_t size,
+											const void*));
+
+static FILE* mallstream;
+static char malloc_trace_buffer[TRACE_BUFFER_SIZE];
+
+
+/* Address to breakpoint on accesses to... */
+void* mallwatch;
+
+static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
+
+
+static int bt_size;
+static void *bt[TR_BT_SIZE + 1];
+static char tr_offsetbuf[20];
+static tr_entry tr_cache[TR_CACHE_SIZE];
+static int tr_cache_level;
+static int tr_cache_pos;
+static int tr_max_offset = 0;
+static void *tr_hashtable[TR_HASHTABLE_SIZE];
+#ifdef PROFILE
+static unsigned long tr_mallocs = 0;
+static unsigned long tr_logged_mallocs = 0;
+static unsigned long tr_frees = 0;
+static unsigned long tr_logged_frees = 0;
+static unsigned long tr_current_mallocs = 0;
+static unsigned long tr_max_mallocs = 0;
+static unsigned long tr_flashes = 0;
+static unsigned long tr_failed_free_lookups = 0;
+static unsigned long tr_malloc_collisions = 0;
+#endif
+
+static CallerNode* CallTree = NULL;
+static char* mallTreeFile = NULL;
+static FILE* mallTreeStream = NULL;
+static long mallThreshold = 2000;
+
+/* This function is called when the block being alloc'd, realloc'd, or
+ * freed has an address matching the variable "mallwatch".  In a
+ * debugger, set "mallwatch" to the address of interest, then put a
+ * breakpoint on tr_break.  */
+void tr_break __P ((void));
+void
+tr_break()
+{
+}
+
+__inline__ static void 
+tr_backtrace(void **_bt, int size)
+{
+	int i;
+	Dl_info info;
+	for (i = 0; i < size; i++)
+	{
+		long hash = (((unsigned long)_bt[i]) / 4) % TR_HASHTABLE_SIZE;
+		if ((tr_hashtable[hash]!= _bt[i]) && dladdr(_bt[i], &info) &&
+			info.dli_fname  && *info.dli_fname)
+		{
+			if (_bt[i] >= (void *) info.dli_saddr)
+				sprintf(tr_offsetbuf, "+%#lx", (unsigned long)
+						(_bt[i] - info.dli_saddr));
+			else
+				sprintf(tr_offsetbuf, "-%#lx", (unsigned long)
+						(info.dli_saddr - _bt[i]));
+			fprintf(mallstream, "%s%s%s%s%s[%p]\n",
+					info.dli_fname ?: "",
+					info.dli_sname ? "(" : "",
+					info.dli_sname ?: "",
+					info.dli_sname ? tr_offsetbuf : "",
+					info.dli_sname ? ")" : "",
+					_bt[i]);
+			tr_hashtable[hash] = _bt[i];
+		}
+		else
+		{
+			fprintf(mallstream, "[%p]\n", _bt[i]);
+		}
+	} 
+}
+
+__inline__ static void 
+tr_log(const void* caller, void* ptr, void* old,
+	   size_t size, int op)
+{
+	int i, offset;
+
+	switch (op)
+	{
+	case TR_FREE:
+		i = HASHFUNC(ptr);
+		if ((offset = (i + tr_max_offset + 1)) >= TR_CACHE_SIZE)
+			offset -= TR_CACHE_SIZE;
+		do
+		{
+			if (tr_cache[i].ptr == ptr)
+			{
+				tr_cache[i].ptr = NULL;
+				free(tr_cache[i].bt);
+				tr_cache_level--;
+				return;
+			}
+			if (++i >= TR_CACHE_SIZE)
+				i = 0;
+#ifdef PROFILE
+			tr_failed_free_lookups++;
+#endif
+		} while (i != offset);
+
+		/* We don't know this allocation, so it has been flushed to disk
+		 * already. So flush free as well. */
+		fprintf(mallstream, "@\n");
+		bt_size = backtrace(bt, TR_BT_SIZE);
+		tr_backtrace(&(bt[1]), bt_size - 2);
+		fprintf(mallstream, "- %p\n", ptr);
+#ifdef PROFILE
+		tr_logged_frees++;
+#endif
+		return;
+
+	case TR_REALLOC:
+		/* If old is 0 it's actually a malloc. */
+		if (old)
+		{
+			i = HASHFUNC(old);
+ 			if ((offset = (i + tr_max_offset + 1)) >= TR_CACHE_SIZE)
+				offset -= TR_CACHE_SIZE;
+			do
+			{
+				if (tr_cache[i].ptr == old)
+				{
+					int j = HASHFUNC(ptr);
+					/* We move the entry otherwise the free will be
+					 * fairly expensive due to the wrong place in the
+					 * hash table. */
+					tr_cache[i].ptr = NULL;
+					for ( ; ; )
+					{
+						if (tr_cache[j].ptr == NULL)
+							break;
+
+						if (++j >= TR_CACHE_SIZE)
+							i = 0;
+					}
+					tr_cache[j].ptr = ptr;
+					if (ptr)
+					{
+						tr_cache[j].size = tr_cache[i].size;
+						tr_cache[j].bt_size = tr_cache[i].bt_size;
+						tr_cache[j].bt = tr_cache[i].bt;
+					}
+					else
+						tr_cache_level--;
+					tr_cache[i].size = size;
+					return;
+				}
+				if (++i >= TR_CACHE_SIZE)
+					i = 0;
+			} while (i != offset);
+
+			fprintf(mallstream, "@\n");
+			bt_size = backtrace(bt, TR_BT_SIZE);
+			tr_backtrace(&(bt[1]), bt_size - 2);
+			fprintf(mallstream, "< %p\n", old);
+			fprintf(mallstream, "> %p %#lx\n", ptr,
+					(unsigned long) size);
+			return;
+		}
+
+	case TR_MALLOC:
+		if (tr_cache_level >= TR_HIGH_MARK)
+		{
+			/* The hash table becomes ineffective when the high mark has
+			 * been reached. We still need some more experience with
+			 * the low mark. It's unclear what reasonable values are. */
+#ifdef PROFILE
+			tr_flashes++;
+#endif
+			i = HASHFUNC(ptr);
+			do
+			{
+				if (tr_cache[i].ptr)
+				{
+#ifdef PROFILE
+					tr_logged_mallocs++;
+#endif
+					fprintf(mallstream, "@\n");
+					tr_backtrace(&(tr_cache[i].bt[1]),
+								 tr_cache[i].bt_size - 2);
+					fprintf(mallstream, "+ %p %#lx\n",
+							tr_cache[i].ptr, 
+							(unsigned long int)
+							tr_cache[i].size);
+					tr_cache[i].ptr = NULL;
+					tr_cache_level--;
+				}
+				if ((i += DELTA) >= TR_CACHE_SIZE)
+					i -= TR_CACHE_SIZE;
+			} while (tr_cache_level > TR_LOW_MARK);
+		}
+
+		i = HASHFUNC(ptr);
+		for ( ; ; )
+		{
+			if (tr_cache[i].ptr == NULL)
+				break;
+
+			if (++i >= TR_CACHE_SIZE)
+				i = 0;
+#ifdef PROFILE
+			tr_malloc_collisions++;
+#endif
+		}
+		if ((offset = (i  - HASHFUNC(ptr))) < 0)
+			offset += TR_CACHE_SIZE;
+		if (offset > tr_max_offset)
+			tr_max_offset = offset;
+
+		tr_cache[i].ptr = ptr; 
+		tr_cache[i].size = size;
+		tr_cache[i].bt = (void**) malloc(TR_BT_SIZE * sizeof(void*));
+		tr_cache[i].bt_size = backtrace(
+			tr_cache[i].bt, TR_BT_SIZE);
+		tr_cache[i].bt = realloc(tr_cache[i].bt, tr_cache[i].bt_size * sizeof(void*));
+		tr_cache_level++;
+
+		return;
+
+	case TR_NONE:
+		if (tr_cache[tr_cache_pos].ptr)
+		{
+#ifdef PROFILE
+			tr_logged_mallocs++;
+#endif
+			fprintf(mallstream, "@\n");
+			tr_backtrace(&(tr_cache[tr_cache_pos].bt[1]),
+						 tr_cache[tr_cache_pos].bt_size - 2);
+			fprintf(mallstream, "+ %p %#lx\n", 
+					tr_cache[tr_cache_pos].ptr, 
+					(unsigned long int)
+					tr_cache[tr_cache_pos].size);
+			tr_cache[tr_cache_pos].ptr = NULL;
+			free(tr_cache[tr_cache_pos].bt);
+			tr_cache_level--;
+		}
+
+		if (++tr_cache_pos >= TR_CACHE_SIZE)
+			tr_cache_pos = 0;
+		break;
+	}
+}
+
+static void
+tr_freehook (ptr, caller)
+     void* ptr;
+     const void* caller;
+{
+	if (ptr == NULL)
+		return;
+	if (ptr == mallwatch)
+		tr_break ();
+
+        pthread_mutex_lock(&lock);
+#ifdef PROFILE
+	tr_frees++;
+	tr_current_mallocs--;
+#endif
+
+	__free_hook = tr_old_free_hook;
+
+	if (tr_old_free_hook != NULL)
+		(*tr_old_free_hook) (ptr, caller);
+	else
+		free(ptr);
+	tr_log(caller, ptr, 0, 0, TR_FREE);
+
+	__free_hook = tr_freehook;
+        pthread_mutex_unlock(&lock);
+}
+
+static void*
+tr_mallochook (size, caller)
+     size_t size;
+     const void* caller;
+{
+	void* hdr;
+
+        pthread_mutex_lock(&lock);
+
+	__malloc_hook = tr_old_malloc_hook;
+	__realloc_hook = tr_old_realloc_hook;
+	__free_hook = tr_old_free_hook;
+
+	if (tr_old_malloc_hook != NULL)
+		hdr = (void*) (*tr_old_malloc_hook) (size, caller);
+	else
+		hdr = (void*) malloc(size);
+	tr_log(caller, hdr, 0, size, TR_MALLOC);
+	/* We only build the allocation tree if mallTreeFile has been set. */
+	if (mallTreeFile)
+		addAllocationToTree();
+
+	__malloc_hook = tr_mallochook;
+	__realloc_hook = tr_reallochook;
+	__free_hook = tr_freehook;
+
+#ifdef PROFILE
+	tr_mallocs++;
+	tr_current_mallocs++;
+	if (tr_current_mallocs > tr_max_mallocs)
+		tr_max_mallocs = tr_current_mallocs;
+#endif
+        pthread_mutex_unlock(&lock);
+
+	if (hdr == mallwatch)
+		tr_break ();
+
+	return hdr;
+}
+
+static void*
+tr_reallochook (ptr, size, caller)
+     void* ptr;
+     size_t size;
+     const void* caller;
+{
+	void* hdr;
+
+	if (ptr == mallwatch)
+		tr_break ();
+
+        pthread_mutex_lock(&lock);
+
+	__free_hook = tr_old_free_hook;
+	__malloc_hook = tr_old_malloc_hook;
+	__realloc_hook = tr_old_realloc_hook;
+
+	if (tr_old_realloc_hook != NULL)
+		hdr = (void*) (*tr_old_realloc_hook) (ptr, size, caller);
+	else
+		hdr = (void*) realloc (ptr, size);
+
+	tr_log(caller, hdr, ptr, size, TR_REALLOC);
+
+	__free_hook = tr_freehook;
+	__malloc_hook = tr_mallochook;
+	__realloc_hook = tr_reallochook;
+
+#ifdef PROFILE
+	/* If ptr is 0 there was no previos malloc of this location */
+	if (ptr == NULL)
+	{
+		tr_mallocs++;
+		tr_current_mallocs++;
+		if (tr_current_mallocs > tr_max_mallocs)
+			tr_max_mallocs = tr_current_mallocs;
+	}
+#endif
+
+        pthread_mutex_unlock(&lock);
+
+	if (hdr == mallwatch)
+		tr_break ();
+
+	return hdr;
+}
+
+void
+addAllocationToTree(void)
+{
+	int bt_size;
+	int i, j;
+	void *bt[TR_BT_SIZE + 1];
+	CallerNode* cn = CallTree;
+	CallerNode** parent = &CallTree;
+	
+	bt_size = backtrace(bt, TR_BT_SIZE);
+	for (i = bt_size - 1; i >= 4; i--)
+	{
+		if (cn == NULL)
+		{
+			*parent = cn = (CallerNode*) malloc(sizeof(CallerNode));
+			cn->funcAdr = bt[i];
+			cn->mallocs = 0;
+			cn->noCallees = 0;
+			cn->maxCallees = 0;
+			cn->callees = NULL;
+		}
+		if (i == 4)
+			cn->mallocs++;
+		else
+		{
+			int knownCallee = 0;
+			for (j = 0; j < cn->noCallees; j++)
+				if (bt[i - 1] == cn->callees[j]->funcAdr)
+				{
+					parent = &cn->callees[j];
+					cn = cn->callees[j];
+					knownCallee = 1;
+					break;
+				}
+			if (!knownCallee)
+			{
+				if (cn->noCallees == cn->maxCallees)
+				{
+					/* Copy callees into new, larger array. */
+					CallerNode** tmp;
+					int newSize = 2 * cn->maxCallees;
+					if (newSize == 0)
+						newSize = 4;
+					tmp = (CallerNode**) malloc(newSize * sizeof(CallerNode*));
+					memcpy(tmp, cn->callees,
+						   cn->maxCallees * sizeof(CallerNode*));
+					if (cn->callees)
+						free(cn->callees);
+					cn->callees = tmp;
+					memset(&cn->callees[cn->maxCallees], 0,
+						   (newSize - cn->maxCallees) * sizeof(CallerNode*));
+					cn->maxCallees = newSize;
+				}
+				parent = &cn->callees[cn->noCallees++];
+				cn = 0;
+			}
+		}
+	}
+}
+
+static int
+removeBranchesBelowThreshold(CallerNode* root)
+{
+	int i;
+	int max;
+
+	if (!root)
+		return (0);
+	for (i = 0; i < root->noCallees; i++)
+	{
+		if (removeBranchesBelowThreshold(root->callees[i]))
+		{
+			free(root->callees[i]);
+			if (root->noCallees > 1)
+			{
+				root->callees[i] = root->callees[root->noCallees - 1];
+				root->callees[root->noCallees - 1] = 0;
+			}
+			else if (root->noCallees == 1)
+				root->callees[i] = 0;
+			
+			root->noCallees--;
+			i--;
+		}
+	}
+	if (root->noCallees == 0 && root->mallocs < mallThreshold )
+		return (1);
+
+	return (0);
+}
+
+static void
+dumpCallTree(CallerNode* root, char* indentStr, int rawMode)
+{
+	int i;
+	Dl_info info;
+	char* newIndentStr;
+	size_t indDepth;
+
+	if (!root || !mallTreeStream)
+		return;
+
+	if (rawMode)
+	{
+		fprintf(mallTreeStream, "-");
+	}
+	else
+	{
+		newIndentStr = (char*) malloc(strlen(indentStr) + 2);
+		strcpy(newIndentStr, indentStr);
+		if (root->noCallees > 0)
+			strcat(newIndentStr, "+");
+		indDepth = strlen(newIndentStr);
+		fprintf(mallTreeStream, "%s- ", newIndentStr);
+	}
+
+	if (dladdr(root->funcAdr, &info) && info.dli_fname  && *info.dli_fname)
+	{
+		if (root->funcAdr >= (void *) info.dli_saddr)
+			sprintf(tr_offsetbuf, "+%#lx", (unsigned long)
+					(root->funcAdr - info.dli_saddr));
+		else
+			sprintf(tr_offsetbuf, "-%#lx", (unsigned long)
+					(info.dli_saddr - root->funcAdr));
+		fprintf(mallTreeStream, "%s%s%s%s%s[%p]",
+				info.dli_fname ?: "",
+				info.dli_sname ? "(" : "",
+				info.dli_sname ?: "",
+				info.dli_sname ? tr_offsetbuf : "",
+				info.dli_sname ? ")" : "",
+				root->funcAdr);
+	}
+	else
+	{
+		fprintf(mallTreeStream, "[%p]", root->funcAdr);
+	}
+	fprintf(mallTreeStream, ": %lu\n", root->mallocs);
+	if (indDepth > 1 && !rawMode)
+	{
+		if (newIndentStr[indDepth - 2] == '+')
+			newIndentStr[indDepth - 2] = '|';
+		else if (newIndentStr[indDepth - 2] == '\\')
+			newIndentStr[indDepth - 2] = ' ';
+	}
+
+	for (i = 0; i < root->noCallees; i++)
+	{
+		if (rawMode)
+			dumpCallTree(root->callees[i], "", 1);
+		else
+		{
+			if (i == root->noCallees - 1)
+				newIndentStr[indDepth - 1] = '\\';
+			dumpCallTree(root->callees[i], newIndentStr, rawMode);
+		}
+	}
+	if (rawMode)
+		fprintf(mallTreeStream, ".\n");
+	else
+		free(newIndentStr);
+	
+}
+
+#ifdef _LIBC
+extern void __libc_freeres (void);
+
+/* This function gets called to make sure all memory the library
+ * allocates get freed and so does not irritate the user when studying
+ * the mtrace output.  */
+static void
+release_libc_mem (void)
+{
+	/* Only call the free function if we still are running in mtrace
+	 * mode. */
+	/*if (mallstream != NULL)
+		__libc_freeres ();*/
+
+	kuntrace();
+        write(2, "kuntrace()\n", 11); 
+}
+#endif
+
+/* We enable tracing if either the environment variable MALLOC_TRACE
+ * or the variable MALLOC_TREE are set, or if the variable mallwatch
+ * has been patched to an address that the debugging user wants us to
+ * stop on.  When patching mallwatch, don't forget to set a breakpoint
+ * on tr_break! */
+void
+ktrace()
+{
+#ifdef _LIBC
+	static int added_atexit_handler;
+#endif
+	char* mallfile;
+
+	/* Don't panic if we're called more than once.  */
+	if (mallstream != NULL)
+		return;
+
+#ifdef _LIBC
+	/* When compiling the GNU libc we use the secure getenv function
+	 * which prevents the misuse in case of SUID or SGID enabled
+     * programs.  */
+	mallfile = __secure_getenv("MALLOC_TRACE");
+	mallTreeFile = __secure_getenv("MALLOC_TREE");
+	if( __secure_getenv("MALLOC_THRESHOLD") != NULL )
+	    mallThreshold = atol(__secure_getenv("MALLOC_THRESHOLD"));
+#else
+	mallfile = getenv("MALLOC_TRACE");
+	mallTreeFile = getenv("MALLOC_TREE");
+	if( getenv("MALLOC_THRESHOLD") != NULL )
+	    mallThreshold = atol(getenv("MALLOC_THRESHOLD"));
+#endif
+	if (mallfile != NULL || mallTreeFile != NULL || mallwatch != NULL)
+    {
+		mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w");
+		if (mallstream != NULL)
+		{
+			char buf[512];
+            
+			/* Be sure it doesn't malloc its buffer!  */
+			setvbuf (mallstream, malloc_trace_buffer, _IOFBF,
+					 TRACE_BUFFER_SIZE);
+			fprintf (mallstream, "= Start\n");
+			memset(buf, 0, sizeof(buf));
+			readlink("/proc/self/exe", buf, sizeof(buf));
+			if(*buf)
+				fprintf (mallstream, "#%s\n", buf);
+
+			/* Save old hooks and hook in our own functions for all
+			 * malloc, realloc and free calls */
+			tr_old_free_hook = __free_hook;
+			__free_hook = tr_freehook;
+			tr_old_malloc_hook = __malloc_hook;
+			__malloc_hook = tr_mallochook;
+			tr_old_realloc_hook = __realloc_hook;
+			__realloc_hook = tr_reallochook;
+
+			tr_cache_pos = TR_CACHE_SIZE;
+			do
+			{
+				tr_cache[--tr_cache_pos].ptr = NULL;
+			} while (tr_cache_pos);
+			tr_cache_level = 0;
+
+			memset(tr_hashtable, 0, sizeof(void*) * TR_HASHTABLE_SIZE);
+#ifdef _LIBC
+			if (!added_atexit_handler)
+			{
+				added_atexit_handler = 1;
+				atexit (release_libc_mem);
+			}
+#endif
+		}
+	}
+}
+
+void
+kuntrace()
+{
+	if (mallstream == NULL)
+		return;
+
+	/* restore hooks to original values */
+	__free_hook = tr_old_free_hook;
+	__malloc_hook = tr_old_malloc_hook;
+	__realloc_hook = tr_old_realloc_hook;
+
+	if (removeBranchesBelowThreshold(CallTree))
+		CallTree = 0;
+	if (mallTreeFile)
+	{
+		if (mallTreeStream = fopen(mallTreeFile, "w"))
+		{
+			dumpCallTree(CallTree, "", 0);
+			fclose(mallTreeStream);
+		}
+	}
+
+	/* Flush cache. */
+	while (tr_cache_level)
+		tr_log(NULL, 0, 0, 0, TR_NONE);
+
+	fprintf (mallstream, "= End\n");
+#ifdef PROFILE
+	fprintf(mallstream, "\nMax Mallocs:    %8ld   Cache Size:   %8ld"
+			"   Flashes:      %8ld\n"
+			"Mallocs:        %8ld   Frees:        %8ld   Leaks:        %8ld\n"
+			"Logged Mallocs: %8ld   Logged Frees: %8ld   Logged Leaks: %8ld\n"
+			"Avg. Free lookups: %ld  Malloc collisions: %ld  Max offset: %ld\n",
+			tr_max_mallocs, TR_CACHE_SIZE, tr_flashes,
+			tr_mallocs, tr_frees, tr_current_mallocs,
+			tr_logged_mallocs, tr_logged_frees,
+			tr_logged_mallocs - tr_logged_frees,
+			tr_frees > 0 ? ( tr_failed_free_lookups / tr_frees ) : 0,
+			tr_malloc_collisions, tr_max_offset);
+#endif
+	fclose (mallstream);
+	mallstream = NULL;
+	write(2, "kuntrace()\n", 11);
+}
+
+int fork()
+{
+  int result;
+  if (mallstream)
+     fflush(mallstream);
+  result = __fork();
+  if (result == 0)
+  {
+    if (mallstream)
+    {
+      close(fileno(mallstream));
+      mallstream = NULL;
+      __free_hook = tr_old_free_hook;
+      __malloc_hook = tr_old_malloc_hook;
+      __realloc_hook = tr_old_realloc_hook;
+    }
+  }
+  return result;
+}
+
+
+static int my_mcount_lock = 0;
+void mcount()
+{
+   Dl_info info;
+   int i = 1;
+   if (my_mcount_lock) return;
+   my_mcount_lock = 1;
+   bt_size = backtrace(bt, TR_BT_SIZE);
+#if 0
+for(i = 1; (i < 5) && (i < bt_size); i++)
+{
+#endif
+   if (dladdr(bt[i], &info) &&	info.dli_fname  && *info.dli_fname)
+   {
+	fprintf(stdout, "%s\n", info.dli_sname ? info.dli_sname : "");
+   }
+   else
+   {
+	fprintf(stdout, "[%p]\n", bt[i]);
+   }
+#if 0
+}
+   fprintf(stdout, "\n");
+#endif   
+   my_mcount_lock = 0;
+}
+