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-rw-r--r--kmtrace/mtrace.c383
1 files changed, 0 insertions, 383 deletions
diff --git a/kmtrace/mtrace.c b/kmtrace/mtrace.c
deleted file mode 100644
index cef74783..00000000
--- a/kmtrace/mtrace.c
+++ /dev/null
@@ -1,383 +0,0 @@
-/* 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, 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;
-}
-
-
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