1 /* Copyright (C) 1996-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #ifndef _MCHECK_H 19 #define _MCHECK_H 1 20 21 #include <features.h> 22 23 __BEGIN_DECLS 24 25 /* Return values for `mprobe': these are the kinds of inconsistencies that 26 `mcheck' enables detection of. */ 27 enum mcheck_status 28 { 29 MCHECK_DISABLED = -1, /* Consistency checking is not turned on. */ 30 MCHECK_OK, /* Block is fine. */ 31 MCHECK_FREE, /* Block freed twice. */ 32 MCHECK_HEAD, /* Memory before the block was clobbered. */ 33 MCHECK_TAIL /* Memory after the block was clobbered. */ 34 }; 35 36 37 /* Activate a standard collection of debugging hooks. This must be called 38 before `malloc' is ever called. ABORTFUNC is called with an error code 39 (see enum above) when an inconsistency is detected. If ABORTFUNC is 40 null, the standard function prints on stderr and then calls `abort'. */ 41 extern int mcheck (void (*__abortfunc)(enum mcheck_status)) __THROW; 42 43 /* Similar to `mcheck' but performs checks for all block whenever one of 44 the memory handling functions is called. This can be very slow. */ 45 extern int mcheck_pedantic (void (*__abortfunc)(enum mcheck_status)) __THROW; 46 47 /* Force check of all blocks now. */ 48 extern void mcheck_check_all (void); 49 50 /* Check for aberrations in a particular malloc'd block. You must have 51 called `mcheck' already. These are the same checks that `mcheck' does 52 when you free or reallocate a block. */ 53 extern enum mcheck_status mprobe (void *__ptr) __THROW; 54 55 /* Activate a standard collection of tracing hooks. */ 56 extern void mtrace (void) __THROW; 57 extern void muntrace (void) __THROW; 58 59 __END_DECLS 60 #endif /* mcheck.h */ 61