diff options
Diffstat (limited to 'malloc/mtrace.c')
| -rw-r--r-- | malloc/mtrace.c | 183 |
1 files changed, 89 insertions, 94 deletions
diff --git a/malloc/mtrace.c b/malloc/mtrace.c index a33399a42a..99ebaffb9b 100644 --- a/malloc/mtrace.c +++ b/malloc/mtrace.c @@ -1,8 +1,8 @@ /* More debugging hooks for `malloc'. Copyright (C) 1991-2014 Free Software Foundation, Inc. This file is part of the GNU C Library. - Written April 2, 1991 by John Gilmore of Cygnus Support. - Based on mcheck.c by Mike Haertel. + Written April 2, 1991 by John Gilmore of Cygnus Support. + Based on mcheck.c by Mike Haertel. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -18,11 +18,11 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifndef _MALLOC_INTERNAL -#define _MALLOC_INTERNAL -#include <malloc.h> -#include <mcheck.h> -#include <bits/libc-lock.h> +#ifndef _MALLOC_INTERNAL +# define _MALLOC_INTERNAL +# include <malloc.h> +# include <mcheck.h> +# include <bits/libc-lock.h> #endif #include <dlfcn.h> @@ -48,7 +48,7 @@ #define TRACE_BUFFER_SIZE 512 static FILE *mallstream; -static const char mallenv[]= "MALLOC_TRACE"; +static const char mallenv[] = "MALLOC_TRACE"; static char *malloc_trace_buffer; __libc_lock_define_initialized (static, lock); @@ -60,9 +60,9 @@ __ptr_t mallwatch; static void (*tr_old_free_hook) (__ptr_t ptr, const __ptr_t); static __ptr_t (*tr_old_malloc_hook) (size_t size, const __ptr_t); static __ptr_t (*tr_old_realloc_hook) (__ptr_t ptr, size_t size, - const __ptr_t); + const __ptr_t); static __ptr_t (*tr_old_memalign_hook) (size_t __alignment, size_t __size, - const __ptr_t); + const __ptr_t); /* This function is called when the block being alloc'd, realloc'd, or freed has an address matching the variable "mallwatch". In a debugger, @@ -79,39 +79,38 @@ libc_hidden_def (tr_break) static void tr_where (const __ptr_t, Dl_info *) __THROW internal_function; static void -internal_function -tr_where (caller, info) - const __ptr_t caller; - Dl_info *info; +internal_function tr_where (caller, info) +const __ptr_t caller; +Dl_info *info; { if (caller != NULL) { if (info != NULL) - { - char *buf = (char *) ""; - if (info->dli_sname != NULL) - { - size_t len = strlen (info->dli_sname); - buf = alloca (len + 6 + 2 * sizeof (void *)); - - buf[0] = '('; - __stpcpy (_fitoa (caller >= (const __ptr_t) info->dli_saddr - ? caller - (const __ptr_t) info->dli_saddr - : (const __ptr_t) info->dli_saddr - caller, - __stpcpy (__mempcpy (buf + 1, info->dli_sname, - len), - caller >= (__ptr_t) info->dli_saddr - ? "+0x" : "-0x"), - 16, 0), - ")"); - } - - fprintf (mallstream, "@ %s%s%s[%p] ", - info->dli_fname ?: "", info->dli_fname ? ":" : "", - buf, caller); - } + { + char *buf = (char *) ""; + if (info->dli_sname != NULL) + { + size_t len = strlen (info->dli_sname); + buf = alloca (len + 6 + 2 * sizeof (void *)); + + buf[0] = '('; + __stpcpy (_fitoa (caller >= (const __ptr_t) info->dli_saddr + ? caller - (const __ptr_t) info->dli_saddr + : (const __ptr_t) info->dli_saddr - caller, + __stpcpy (__mempcpy (buf + 1, info->dli_sname, + len), + caller >= (__ptr_t) info->dli_saddr + ? "+0x" : "-0x"), + 16, 0), + ")"); + } + + fprintf (mallstream, "@ %s%s%s[%p] ", + info->dli_fname ? : "", info->dli_fname ? ":" : "", + buf, caller); + } else - fprintf (mallstream, "@ [%p] ", caller); + fprintf (mallstream, "@ [%p] ", caller); } } @@ -131,10 +130,9 @@ lock_and_info (const __ptr_t caller, Dl_info *mem) static void tr_freehook (__ptr_t, const __ptr_t) __THROW; -static void -tr_freehook (ptr, caller) - __ptr_t ptr; - const __ptr_t caller; +static void tr_freehook (ptr, caller) +__ptr_t ptr; +const __ptr_t caller; { if (ptr == NULL) return; @@ -152,7 +150,7 @@ tr_freehook (ptr, caller) } __free_hook = tr_old_free_hook; if (tr_old_free_hook != NULL) - (*tr_old_free_hook) (ptr, caller); + (*tr_old_free_hook)(ptr, caller); else free (ptr); __free_hook = tr_freehook; @@ -160,10 +158,9 @@ tr_freehook (ptr, caller) } static __ptr_t tr_mallochook (size_t, const __ptr_t) __THROW; -static __ptr_t -tr_mallochook (size, caller) - size_t size; - const __ptr_t caller; +static __ptr_t tr_mallochook (size, caller) +size_t size; +const __ptr_t caller; { __ptr_t hdr; @@ -172,7 +169,7 @@ tr_mallochook (size, caller) __malloc_hook = tr_old_malloc_hook; if (tr_old_malloc_hook != NULL) - hdr = (__ptr_t) (*tr_old_malloc_hook) (size, caller); + hdr = (__ptr_t) (*tr_old_malloc_hook)(size, caller); else hdr = (__ptr_t) malloc (size); __malloc_hook = tr_mallochook; @@ -190,12 +187,11 @@ tr_mallochook (size, caller) } static __ptr_t tr_reallochook (__ptr_t, size_t, const __ptr_t) - __THROW; -static __ptr_t -tr_reallochook (ptr, size, caller) - __ptr_t ptr; - size_t size; - const __ptr_t caller; +__THROW; +static __ptr_t tr_reallochook (ptr, size, caller) +__ptr_t ptr; +size_t size; +const __ptr_t caller; { __ptr_t hdr; @@ -209,7 +205,7 @@ tr_reallochook (ptr, size, caller) __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); + hdr = (__ptr_t) (*tr_old_realloc_hook)(ptr, size, caller); else hdr = (__ptr_t) realloc (ptr, size); __free_hook = tr_freehook; @@ -220,10 +216,10 @@ tr_reallochook (ptr, size, caller) if (hdr == NULL) { if (size != 0) - /* Failed realloc. */ - fprintf (mallstream, "! %p %#lx\n", ptr, (unsigned long int) size); + /* Failed realloc. */ + fprintf (mallstream, "! %p %#lx\n", ptr, (unsigned long int) size); else - fprintf (mallstream, "- %p\n", ptr); + fprintf (mallstream, "- %p\n", ptr); } else if (ptr == NULL) fprintf (mallstream, "+ %p %#lx\n", hdr, (unsigned long int) size); @@ -243,11 +239,10 @@ tr_reallochook (ptr, size, caller) } static __ptr_t tr_memalignhook (size_t, size_t, - const __ptr_t) __THROW; -static __ptr_t -tr_memalignhook (alignment, size, caller) - size_t alignment, size; - const __ptr_t caller; + const __ptr_t) __THROW; +static __ptr_t tr_memalignhook (alignment, size, caller) +size_t alignment, size; +const __ptr_t caller; { __ptr_t hdr; @@ -257,7 +252,7 @@ tr_memalignhook (alignment, size, caller) __memalign_hook = tr_old_memalign_hook; __malloc_hook = tr_old_malloc_hook; if (tr_old_memalign_hook != NULL) - hdr = (__ptr_t) (*tr_old_memalign_hook) (alignment, size, caller); + hdr = (__ptr_t) (*tr_old_memalign_hook)(alignment, size, caller); else hdr = (__ptr_t) memalign (alignment, size); __memalign_hook = tr_memalignhook; @@ -321,44 +316,44 @@ mtrace (void) { char *mtb = malloc (TRACE_BUFFER_SIZE); if (mtb == NULL) - return; + return; mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "wce"); if (mallstream != NULL) - { + { #ifndef __ASSUME_O_CLOEXEC - /* Make sure we close the file descriptor on exec. */ - int flags = __fcntl (fileno (mallstream), F_GETFD, 0); - if (flags >= 0) - { - flags |= FD_CLOEXEC; - __fcntl (fileno (mallstream), F_SETFD, flags); - } + /* Make sure we close the file descriptor on exec. */ + int flags = __fcntl (fileno (mallstream), F_GETFD, 0); + if (flags >= 0) + { + flags |= FD_CLOEXEC; + __fcntl (fileno (mallstream), F_SETFD, flags); + } #endif - /* Be sure it doesn't malloc its buffer! */ - malloc_trace_buffer = mtb; - 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_old_memalign_hook = __memalign_hook; - __memalign_hook = tr_memalignhook; + /* Be sure it doesn't malloc its buffer! */ + malloc_trace_buffer = mtb; + 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_old_memalign_hook = __memalign_hook; + __memalign_hook = tr_memalignhook; #ifdef _LIBC - if (!added_atexit_handler) - { - extern void *__dso_handle __attribute__ ((__weak__)); - added_atexit_handler = 1; - __cxa_atexit ((void (*) (void *)) release_libc_mem, NULL, - &__dso_handle ? __dso_handle : NULL); - } + if (!added_atexit_handler) + { + extern void *__dso_handle __attribute__ ((__weak__)); + added_atexit_handler = 1; + __cxa_atexit ((void (*)(void *))release_libc_mem, NULL, + &__dso_handle ? __dso_handle : NULL); + } #endif - } + } else - free (mtb); + free (mtb); } } |