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, 383 insertions, 0 deletions

diff --git a/kmtrace/mtrace.c b/kmtrace/mtrace.c
new file mode 100644
index 00000000..26c08ae6
--- /dev/null
+++ b/kmtrace/mtrace.c
@@ -0,0 +1,383 @@
+/* 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
+
+   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 _LIBC
+#define MALLOC_HOOKS
+
+#ifndef	_MALLOC_INTERNAL
+#define	_MALLOC_INTERNAL
+#include <malloc.h>
+#include <mcheck.h>
+#include <bits/libc-lock.h>
+#endif
+
+#include <dlfcn.h>
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <stdio-common/_itoa.h>
+#include <elf/ldsodefs.h>
+
+#ifdef USE_IN_LIBIO
+# include <libio/iolibio.h>
+# define setvbuf(s, b, f, l) _IO_setvbuf (s, b, f, l)
+#endif
+
+#define TRACE_BUFFER_SIZE 512
+
+static FILE *mallstream;
+static const char mallenv[]= "MALLOC_TRACE";
+static char malloc_trace_buffer[TRACE_BUFFER_SIZE];
+
+__libc_lock_define_initialized (static, lock)
+
+/* Address to breakpoint on accesses to... */
+__ptr_t mallwatch;
+
+/* File name and line number information, for callers that had
+   the foresight to call through a macro.  */
+char *_mtrace_file;
+int _mtrace_line;
+
+/* Old hook values.  */
+static void (*tr_old_free_hook) __P ((__ptr_t ptr, const __ptr_t));
+static __ptr_t (*tr_old_malloc_hook) __P ((__malloc_size_t size,
+					   const __ptr_t));
+static __ptr_t (*tr_old_realloc_hook) __P ((__ptr_t ptr,
+					    __malloc_size_t size,
+					    const __ptr_t));
+
+#define TR_PIPELINE_SIZE	16
+#define TR_BT_SIZE		80
+#define TR_HASHTABLE_SIZE	9973
+
+#define TR_NONE		0
+#define TR_MALLOC	1
+#define TR_REALLOC	2
+#define TR_FREE		3
+
+typedef struct {
+   int op;
+   __ptr_t ptr;
+   __ptr_t old;
+   __malloc_size_t size;
+   int bt_size;
+   void *bt[TR_BT_SIZE+1];
+} tr_entry;
+
+static tr_entry tr_pipeline[TR_PIPELINE_SIZE];
+static int tr_pipeline_pos;
+static void *tr_hashtable[TR_HASHTABLE_SIZE];
+
+
+/* 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 ()
+{
+}
+
+static void
+tr_backtrace(void **bt, int size)
+{
+  char buf[20];
+  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]) && _dl_addr(bt[i], &info) && info.dli_fname  && *info.dli_fname)
+     {
+        if (bt[i] >= (void *) info.dli_saddr)
+           sprintf(buf, "+%#lx", (unsigned long)(bt[i] - info.dli_saddr));
+        else
+           sprintf(buf, "-%#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 ? buf : "",
+		   info.dli_sname ? ")" : "",
+		   bt[i]);
+	tr_hashtable[hash] = bt[i];
+     }
+     else {
+        fprintf(mallstream, "[%p]\n", bt[i]);
+     }
+  } 
+}
+
+static void
+inline
+tr_log(const __ptr_t caller, __ptr_t ptr, __ptr_t old,  __malloc_size_t size, int op)
+{
+  switch(op)
+  {
+    case TR_REALLOC:
+	break;
+    case TR_MALLOC:
+	break;
+    case TR_FREE:
+    {
+      int i = tr_pipeline_pos;
+      do {
+	if (i) i--; else i = TR_PIPELINE_SIZE-1;
+        if (tr_pipeline[i].ptr == ptr)
+        {
+           if (tr_pipeline[i].op == TR_MALLOC)
+           {
+              tr_pipeline[i].op = TR_NONE;
+              tr_pipeline[i].ptr = NULL;
+              return;
+           }
+           break;
+        }
+      } while (i != tr_pipeline_pos);
+    }  
+  }
+
+  if (tr_pipeline[tr_pipeline_pos].op)
+  {
+      putc('@', mallstream);
+      putc('\n', mallstream);
+      /* Generate backtrace... 
+       * We throw out the first frame (tr_mallochook)
+       * end the last one (_start)
+       */
+      tr_backtrace(&(tr_pipeline[tr_pipeline_pos].bt[1]), 
+		     tr_pipeline[tr_pipeline_pos].bt_size-2);
+	
+      switch(tr_pipeline[tr_pipeline_pos].op)
+      {
+	case TR_MALLOC:
+	        fprintf (mallstream, "+ %p %#lx\n", 
+ 			tr_pipeline[tr_pipeline_pos].ptr, 
+			(unsigned long int) tr_pipeline[tr_pipeline_pos].size);
+		break;
+	case TR_FREE:
+	        fprintf (mallstream, "- %p\n", 
+ 			tr_pipeline[tr_pipeline_pos].ptr);
+		break;
+	case TR_REALLOC:
+	        fprintf (mallstream, "< %p\n", 
+ 			tr_pipeline[tr_pipeline_pos].old);
+	        fprintf (mallstream, "> %p %#lx\n", 
+ 			tr_pipeline[tr_pipeline_pos].ptr, 
+			(unsigned long int) tr_pipeline[tr_pipeline_pos].size);
+		break;
+      }
+  }
+
+  tr_pipeline[tr_pipeline_pos].op = op; 
+  tr_pipeline[tr_pipeline_pos].ptr = ptr; 
+  tr_pipeline[tr_pipeline_pos].old = old; 
+  tr_pipeline[tr_pipeline_pos].size = size; 
+  tr_pipeline[tr_pipeline_pos].bt_size = backtrace(
+	tr_pipeline[tr_pipeline_pos].bt, TR_BT_SIZE);
+  tr_pipeline_pos++;
+  if (tr_pipeline_pos == TR_PIPELINE_SIZE)
+     tr_pipeline_pos = 0;
+}
+
+static void tr_freehook __P ((__ptr_t, const __ptr_t));
+static void
+tr_freehook (ptr, caller)
+     __ptr_t ptr;
+     const __ptr_t caller;
+{
+  if (ptr == NULL)
+    return;
+  __libc_lock_lock (lock);
+  tr_log(caller, ptr, 0, 0, TR_FREE );
+  __libc_lock_unlock (lock);
+  if (ptr == mallwatch)
+    tr_break ();
+  __libc_lock_lock (lock);
+  __free_hook = tr_old_free_hook;
+  if (tr_old_free_hook != NULL)
+    (*tr_old_free_hook) (ptr, caller);
+  else
+    free (ptr);
+  __free_hook = tr_freehook;
+  __libc_lock_unlock (lock);
+}
+
+static __ptr_t tr_mallochook __P ((__malloc_size_t, const __ptr_t));
+static __ptr_t
+tr_mallochook (size, caller)
+     __malloc_size_t size;
+     const __ptr_t caller;
+{
+  __ptr_t hdr;
+
+  __libc_lock_lock (lock);
+
+  __malloc_hook = tr_old_malloc_hook;
+  if (tr_old_malloc_hook != NULL)
+    hdr = (__ptr_t) (*tr_old_malloc_hook) (size, caller);
+  else
+    hdr = (__ptr_t) malloc (size);
+  __malloc_hook = tr_mallochook;
+
+  tr_log(caller, hdr, 0, size, TR_MALLOC);
+
+  __libc_lock_unlock (lock);
+
+  if (hdr == mallwatch)
+    tr_break ();
+
+  return hdr;
+}
+
+static __ptr_t tr_reallochook __P ((__ptr_t, __malloc_size_t, const __ptr_t));
+static __ptr_t
+tr_reallochook (ptr, size, caller)
+     __ptr_t ptr;
+     __malloc_size_t size;
+     const __ptr_t caller;
+{
+  __ptr_t hdr;
+
+  if (ptr == mallwatch)
+    tr_break ();
+
+  __libc_lock_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 = (__ptr_t) (*tr_old_realloc_hook) (ptr, size, caller);
+  else
+    hdr = (__ptr_t) realloc (ptr, size);
+  __free_hook = tr_freehook;
+  __malloc_hook = tr_mallochook;
+  __realloc_hook = tr_reallochook;
+
+  tr_log(caller, hdr, ptr, size, TR_REALLOC);
+
+  __libc_lock_unlock (lock);
+
+  if (hdr == mallwatch)
+    tr_break ();
+
+  return hdr;
+}
+
+
+#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 ();
+}
+#endif
+
+
+/* We enable tracing if either the environment variable MALLOC_TRACE
+   is 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
+mtrace ()
+{
+#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 (mallenv);
+#else
+  mallfile = getenv (mallenv);
+#endif
+  if (mallfile != NULL || mallwatch != NULL)
+    {
+      mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w");
+      if (mallstream != NULL)
+	{
+	  /* Be sure it doesn't malloc its buffer!  */
+	  setvbuf (mallstream, malloc_trace_buffer, _IOFBF, TRACE_BUFFER_SIZE);
+	  fprintf (mallstream, "= Start\n");
+	  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_pipeline_pos = TR_PIPELINE_SIZE;
+          for(;tr_pipeline_pos--;) 
+	  {
+            tr_pipeline[tr_pipeline_pos].op = TR_NONE;
+            tr_pipeline[tr_pipeline_pos].ptr = NULL;
+          }
+          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
+muntrace ()
+{
+  if (mallstream == NULL)
+    return;
+
+  fprintf (mallstream, "= End\n");
+  fclose (mallstream);
+  mallstream = NULL;
+  __free_hook = tr_old_free_hook;
+  __malloc_hook = tr_old_malloc_hook;
+  __realloc_hook = tr_old_realloc_hook;
+}
+
+