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-rw-r--r--kmtrace/ktrace.c840
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 <cs@kde.org>
+
+ 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 mike@ai.mit.edu,
+ 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;
+}
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-05 02:11:40 +0000