/* * libc/stdlib/malloc/malloc_debug.c -- malloc debugging support * * Copyright (C) 2002 NEC Corporation * Copyright (C) 2002 Miles Bader <miles@gnu.org> * * This file is subject to the terms and conditions of the GNU Lesser * General Public License. See the file COPYING.LIB in the main * directory of this archive for more details. * * Written by Miles Bader <miles@gnu.org> */ #include <stdlib.h> #include <stdio.h> #include <unistd.h> #include <stdarg.h> #include "malloc.h" #include "heap.h" int __malloc_debug = 0, __malloc_check = 0; #ifdef MALLOC_MMB_DEBUGGING int __malloc_mmb_debug = 0; #endif /* Debugging output is indented this may levels. */ int __malloc_debug_cur_indent = 0; /* Print FMT and args indented at the current debug print level, followed by a newline, and change the level by INDENT. */ void __malloc_debug_printf (int indent, const char *fmt, ...) { unsigned spaces = __malloc_debug_cur_indent * MALLOC_DEBUG_INDENT_SIZE; va_list val; while (spaces > 0) { putc (' ', stderr); spaces--; } va_start (val, fmt); vfprintf (stderr, fmt, val); va_end (val); putc ('\n', stderr); __malloc_debug_indent (indent); } void __malloc_debug_init (void) { char *ev = getenv ("MALLOC_DEBUG"); if (ev) { int val = atoi (ev); if (val & 1) __malloc_check = 1; if (val & 2) __malloc_debug = 1; #ifdef MALLOC_MMB_DEBUGGING if (val & 4) __malloc_mmb_debug = 1; #endif #ifdef HEAP_DEBUGGING if (val & 8) __heap_debug = 1; #endif if (val) __malloc_debug_printf (0, "malloc_debug: initialized to %d (check = %d, dump = %d, dump_mmb = %d, dump_heap = %d)", val, !!(val & 1), !!(val & 2), !!(val & 4), !!(val & 8)); } }