1 2 /*--------------------------------------------------------------------*/ 3 /*--- Malloc replacement. pub_tool_replacemalloc.h ---*/ 4 /*--------------------------------------------------------------------*/ 5 6 /* 7 This file is part of Valgrind, a dynamic binary instrumentation 8 framework. 9 10 Copyright (C) 2000-2013 Julian Seward 11 jseward (at) acm.org 12 13 This program is free software; you can redistribute it and/or 14 modify it under the terms of the GNU General Public License as 15 published by the Free Software Foundation; either version 2 of the 16 License, or (at your option) any later version. 17 18 This program is distributed in the hope that it will be useful, but 19 WITHOUT ANY WARRANTY; without even the implied warranty of 20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 21 General Public License for more details. 22 23 You should have received a copy of the GNU General Public License 24 along with this program; if not, write to the Free Software 25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 26 02111-1307, USA. 27 28 The GNU General Public License is contained in the file COPYING. 29 */ 30 31 #ifndef __PUB_TOOL_REPLACEMALLOC_H 32 #define __PUB_TOOL_REPLACEMALLOC_H 33 34 #include "pub_tool_basics.h" // Addr 35 36 /* If a tool replaces malloc() et al, the easiest way to do so is to 37 link libreplacemalloc_toolpreload.o into its vgpreload_*.so file, and 38 use the functions declared below. You can do it from scratch, 39 though, if you enjoy that sort of thing. */ 40 41 /* Can be called from VG_(tdict).malloc_malloc et al to do the actual 42 * alloc/freeing. */ 43 extern void* VG_(cli_malloc) ( SizeT align, SizeT nbytes ); 44 extern void VG_(cli_free) ( void* p ); 45 // Returns the usable size of a heap-block. It's the asked-for size plus 46 // possibly some more due to rounding up. 47 extern SizeT VG_(cli_malloc_usable_size)( void* p ); 48 49 50 /* If a tool uses deferred freeing (e.g. memcheck to catch accesses to 51 freed memory) it can maintain number and total size of queued blocks 52 in these variable to provide more accurate statistics about client 53 memory usage. Currently used by mallinfo(). */ 54 extern Long VG_(free_queue_volume); 55 extern Long VG_(free_queue_length); 56 57 /* Check if an address is within a range, allowing for redzones at edges */ 58 extern Bool VG_(addr_is_in_block)( Addr a, Addr start, 59 SizeT size, SizeT rz_szB ); 60 61 /* ------------------------------------------------------------------ */ 62 /* Some options that can be used by a tool if malloc() et al are replaced. 63 The tool should call the functions in the appropriate places to give 64 control over these aspects of Valgrind's version of malloc(). */ 65 66 /* DEBUG: print malloc details? default: NO */ 67 extern Bool VG_(clo_trace_malloc); 68 /* Minimum alignment in functions that don't specify alignment explicitly. 69 default: VG_MIN_MALLOC_SZB */ 70 extern UInt VG_(clo_alignment); 71 72 extern Bool VG_(replacement_malloc_process_cmd_line_option) ( const HChar* arg ); 73 74 // If tool is replacing malloc for the client, the below returns 75 // the effective client redzone as derived from the default 76 // provided by the tool, VG_(clo_redzone_size) and the minimum 77 // redzone required by m_mallocfree.c. 78 // It is an error to call this before VG_(needs_malloc_replacement) has 79 // been called. 80 extern SizeT VG_(malloc_effective_client_redzone_size)(void); 81 82 #endif // __PUB_TOOL_REPLACEMALLOC_H 83 84 /*--------------------------------------------------------------------*/ 85 /*--- end ---*/ 86 /*--------------------------------------------------------------------*/ 87
