1ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 2ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--------------------------------------------------------------------*/ 3ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- The address space manager: stuff common to all platforms ---*/ 4ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- ---*/ 5ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- m_aspacemgr-common.c ---*/ 6ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--------------------------------------------------------------------*/ 7ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 8ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* 9ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown This file is part of Valgrind, a dynamic binary instrumentation 10ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown framework. 11ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 12b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov Copyright (C) 2006-2011 OpenWorks LLP 13ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown info@open-works.co.uk 14ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 15ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown This program is free software; you can redistribute it and/or 16ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown modify it under the terms of the GNU General Public License as 17ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown published by the Free Software Foundation; either version 2 of the 18ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown License, or (at your option) any later version. 19ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 20ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown This program is distributed in the hope that it will be useful, but 21ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown WITHOUT ANY WARRANTY; without even the implied warranty of 22ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown General Public License for more details. 24ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 25ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown You should have received a copy of the GNU General Public License 26ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown along with this program; if not, write to the Free Software 27ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 28ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 02111-1307, USA. 29ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 30ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown The GNU General Public License is contained in the file COPYING. 31ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown*/ 32ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 33ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* ************************************************************* 34ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown DO NOT INCLUDE ANY OTHER FILES HERE. 35ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ADD NEW INCLUDES ONLY TO priv_aspacemgr.h 36ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown AND THEN ONLY AFTER READING DIRE WARNINGS THERE TOO. 37ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ************************************************************* */ 38ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 39ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include "priv_aspacemgr.h" 40ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#include "config.h" 41ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 42ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 43ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*-----------------------------------------------------------------*/ 44ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- ---*/ 45ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- Stuff to make aspacem almost completely independent of ---*/ 46ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- the rest of Valgrind. ---*/ 47ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- ---*/ 48ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*-----------------------------------------------------------------*/ 49ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 50ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown//-------------------------------------------------------------- 51ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown// Simple assert and assert-like fns, which avoid dependence on 52ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown// m_libcassert, and hence on the entire debug-info reader swamp 53ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 54ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown__attribute__ ((noreturn)) 55ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownvoid ML_(am_exit)( Int status ) 56ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 57ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# if defined(VGO_linux) 58ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (void)VG_(do_syscall1)(__NR_exit_group, status); 59ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 60ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (void)VG_(do_syscall1)(__NR_exit, status); 61ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Why are we still alive here? */ 62ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /*NOTREACHED*/ 63ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *(volatile Int *)0 = 'x'; 64ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown aspacem_assert(2+2 == 5); 65ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 66ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 67ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownvoid ML_(am_barf) ( HChar* what ) 68ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 69ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", "Valgrind: FATAL: %s\n", what); 70ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", "Exiting now.\n"); 71ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ML_(am_exit)(1); 72ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 73ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 74ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownvoid ML_(am_barf_toolow) ( HChar* what ) 75ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 76ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", 77ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "Valgrind: FATAL: %s is too low.\n", what); 78ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", " Increase it and rebuild. " 79ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "Exiting now.\n"); 80ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ML_(am_exit)(1); 81ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 82ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 83ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownvoid ML_(am_assert_fail)( const HChar* expr, 84ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const Char* file, 85ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Int line, 86ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown const Char* fn ) 87ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 88ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", 89ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown "Valgrind: FATAL: aspacem assertion failed:\n"); 90ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", " %s\n", expr); 91ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", " at %s:%d (%s)\n", file,line,fn); 92ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)(0, "aspacem", "Exiting now.\n"); 93ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ML_(am_exit)(1); 94ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 95ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 96ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownInt ML_(am_getpid)( void ) 97ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 98ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes sres = VG_(do_syscall0)(__NR_getpid); 99ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown aspacem_assert(!sr_isError(sres)); 100ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return sr_Res(sres); 101ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 102ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 103ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 104ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown//-------------------------------------------------------------- 105ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown// A simple sprintf implementation, so as to avoid dependence on 106ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown// m_libcprint. 107ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 108ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic void local_add_to_aspacem_sprintf_buf ( HChar c, void *p ) 109ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 110ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown HChar** aspacem_sprintf_ptr = p; 111ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *(*aspacem_sprintf_ptr)++ = c; 112ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 113ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 114ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic 115ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownUInt local_vsprintf ( HChar* buf, const HChar *format, va_list vargs ) 116ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 117ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Int ret; 118ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Char *aspacem_sprintf_ptr = buf; 119ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 120ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ret = VG_(debugLog_vprintf) 121ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ( local_add_to_aspacem_sprintf_buf, 122ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown &aspacem_sprintf_ptr, format, vargs ); 123ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown local_add_to_aspacem_sprintf_buf('\0', &aspacem_sprintf_ptr); 124ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 125ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return ret; 126ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 127ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 128ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownUInt ML_(am_sprintf) ( HChar* buf, const HChar *format, ... ) 129ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 130ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown UInt ret; 131ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown va_list vargs; 132ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 133ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown va_start(vargs,format); 134ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ret = local_vsprintf(buf, format, vargs); 135ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown va_end(vargs); 136ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 137ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return ret; 138ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 139ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 140ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 141ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown//-------------------------------------------------------------- 142ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown// Direct access to a handful of syscalls. This avoids dependence on 143b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// m_libc*. THESE DO NOT UPDATE THE aspacem-internal DATA 144b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov// STRUCTURES (SEGMENT ARRAY). DO NOT USE THEM UNLESS YOU KNOW WHAT 145ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown// YOU ARE DOING. 146ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 147ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* --- Pertaining to mappings --- */ 148ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 149ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Note: this is VG_, not ML_. */ 150ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSysRes VG_(am_do_mmap_NO_NOTIFY)( Addr start, SizeT length, UInt prot, 151ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown UInt flags, Int fd, Off64T offset) 152ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 153ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res; 154ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown aspacem_assert(VG_IS_PAGE_ALIGNED(offset)); 155ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# if defined(VGP_x86_linux) || defined(VGP_ppc32_linux) \ 156ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown || defined(VGP_arm_linux) 157ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* mmap2 uses 4096 chunks even if actual page size is bigger. */ 158ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown aspacem_assert((offset % 4096) == 0); 159ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall6)(__NR_mmap2, (UWord)start, length, 160ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown prot, flags, fd, offset / 4096); 161ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# elif defined(VGP_amd64_linux) || defined(VGP_ppc64_linux) \ 162b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov || defined(VGP_s390x_linux) 163ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall6)(__NR_mmap, (UWord)start, length, 164ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown prot, flags, fd, offset); 165ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# elif defined(VGP_x86_darwin) 166ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (fd == 0 && (flags & VKI_MAP_ANONYMOUS)) { 167ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fd = -1; // MAP_ANON with fd==0 is EINVAL 168ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 169ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall7)(__NR_mmap, (UWord)start, length, 170ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown prot, flags, fd, offset & 0xffffffff, offset >> 32); 171ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# elif defined(VGP_amd64_darwin) 172ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (fd == 0 && (flags & VKI_MAP_ANONYMOUS)) { 173ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fd = -1; // MAP_ANON with fd==0 is EINVAL 174ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 175ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall6)(__NR_mmap, (UWord)start, length, 176ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown prot, flags, (UInt)fd, offset); 177ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# else 178ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# error Unknown platform 179ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 180ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return res; 181ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 182ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 183ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownstatic 184ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSysRes local_do_mprotect_NO_NOTIFY(Addr start, SizeT length, UInt prot) 185ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 186ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return VG_(do_syscall3)(__NR_mprotect, (UWord)start, length, prot ); 187ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 188ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 189ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSysRes ML_(am_do_munmap_NO_NOTIFY)(Addr start, SizeT length) 190ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 191ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return VG_(do_syscall2)(__NR_munmap, (UWord)start, length ); 192ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 193ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 194ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#if HAVE_MREMAP 195ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* The following are used only to implement mremap(). */ 196ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 197ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSysRes ML_(am_do_extend_mapping_NO_NOTIFY)( 198ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Addr old_addr, 199ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SizeT old_len, 200ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SizeT new_len 201ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ) 202ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 203ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Extend the mapping old_addr .. old_addr+old_len-1 to have length 204ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_len, WITHOUT moving it. If it can't be extended in place, 205ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown fail. */ 206ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# if defined(VGO_linux) 207ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return VG_(do_syscall5)( 208ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown __NR_mremap, 209ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown old_addr, old_len, new_len, 210ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 0/*flags, meaning: must be at old_addr, else FAIL */, 211ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 0/*new_addr, is ignored*/ 212ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ); 213ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# else 214ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# error Unknown OS 215ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 216ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 217ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 218ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSysRes ML_(am_do_relocate_nooverlap_mapping_NO_NOTIFY)( 219ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Addr old_addr, Addr old_len, 220ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Addr new_addr, Addr new_len 221ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ) 222ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 223ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Move the mapping old_addr .. old_addr+old_len-1 to the new 224ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown location and with the new length. Only needs to handle the case 225ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown where the two areas do not overlap, neither length is zero, and 226ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown all args are page aligned. */ 227ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# if defined(VGO_linux) 228ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return VG_(do_syscall5)( 229ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown __NR_mremap, 230ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown old_addr, old_len, new_len, 231ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VKI_MREMAP_MAYMOVE|VKI_MREMAP_FIXED/*move-or-fail*/, 232ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown new_addr 233ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ); 234ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# else 235ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# error Unknown OS 236ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 237ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 238ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 239ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#endif 240ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 241ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* --- Pertaining to files --- */ 242ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 243ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSysRes ML_(am_open) ( const Char* pathname, Int flags, Int mode ) 244ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 245ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res = VG_(do_syscall3)(__NR_open, (UWord)pathname, flags, mode); 246ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return res; 247ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 248ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 249ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownInt ML_(am_read) ( Int fd, void* buf, Int count) 250ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 251ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res = VG_(do_syscall3)(__NR_read, fd, (UWord)buf, count); 252ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return sr_isError(res) ? -1 : sr_Res(res); 253ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 254ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 255ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brownvoid ML_(am_close) ( Int fd ) 256ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 257ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (void)VG_(do_syscall1)(__NR_close, fd); 258ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 259ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 260ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownInt ML_(am_readlink)(HChar* path, HChar* buf, UInt bufsiz) 261ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 262ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res; 263ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall3)(__NR_readlink, (UWord)path, (UWord)buf, bufsiz); 264ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return sr_isError(res) ? -1 : sr_Res(res); 265ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 266ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 267ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownInt ML_(am_fcntl) ( Int fd, Int cmd, Addr arg ) 268ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 269b32f58018498ea2225959b0ba11c18f0c433deefEvgeniy Stepanov# if defined(VGO_linux) 270ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res = VG_(do_syscall3)(__NR_fcntl, fd, cmd, arg); 271ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# elif defined(VGO_darwin) 272ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res = VG_(do_syscall3)(__NR_fcntl_nocancel, fd, cmd, arg); 273ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# else 274ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# error "Unknown OS" 275ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 276ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return sr_isError(res) ? -1 : sr_Res(res); 277ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 278ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 279ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Get the dev, inode and mode info for a file descriptor, if 280ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown possible. Returns True on success. */ 281ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownBool ML_(am_get_fd_d_i_m)( Int fd, 282ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /*OUT*/ULong* dev, 283ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /*OUT*/ULong* ino, /*OUT*/UInt* mode ) 284ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 285ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes res; 286ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown struct vki_stat buf; 287ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# if defined(VGO_linux) && defined(__NR_fstat64) 288ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Try fstat64 first as it can cope with minor and major device 289ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown numbers outside the 0-255 range and it works properly for x86 290ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown binaries on amd64 systems where fstat seems to be broken. */ 291ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown struct vki_stat64 buf64; 292ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall2)(__NR_fstat64, fd, (UWord)&buf64); 293ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (!sr_isError(res)) { 294ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *dev = (ULong)buf64.st_dev; 295ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *ino = (ULong)buf64.st_ino; 296ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *mode = (UInt) buf64.st_mode; 297ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return True; 298ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 299ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 300ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown res = VG_(do_syscall2)(__NR_fstat, fd, (UWord)&buf); 301ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (!sr_isError(res)) { 302ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *dev = (ULong)buf.st_dev; 303ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *ino = (ULong)buf.st_ino; 304ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *mode = (UInt) buf.st_mode; 305ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return True; 306ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 307ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return False; 308ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 309ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 310ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownBool ML_(am_resolve_filename) ( Int fd, /*OUT*/HChar* buf, Int nbuf ) 311ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 312ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#if defined(VGO_linux) 313ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Int i; 314ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown HChar tmp[64]; 315ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown for (i = 0; i < nbuf; i++) buf[i] = 0; 316ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ML_(am_sprintf)(tmp, "/proc/self/fd/%d", fd); 317ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (ML_(am_readlink)(tmp, buf, nbuf) > 0 && buf[0] == '/') 318ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return True; 319ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown else 320ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return False; 321ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 322ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown#elif defined(VGO_darwin) 323ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown HChar tmp[VKI_MAXPATHLEN+1]; 324ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (0 == ML_(am_fcntl)(fd, VKI_F_GETPATH, (UWord)tmp)) { 325ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (nbuf > 0) { 326ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(strncpy)( buf, tmp, nbuf < sizeof(tmp) ? nbuf : sizeof(tmp) ); 327ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown buf[nbuf-1] = 0; 328ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 329ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (tmp[0] == '/') return True; 330ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 331ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return False; 332ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 333ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# else 334ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# error Unknown OS 335ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown# endif 336ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 337ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 338ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 339ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 340ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 341ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*-----------------------------------------------------------------*/ 342ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- ---*/ 343ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- Manage stacks for Valgrind itself. ---*/ 344ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- ---*/ 345ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*-----------------------------------------------------------------*/ 346ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 347ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Allocate and initialise a VgStack (anonymous valgrind space). 348ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Protect the stack active area and the guard areas appropriately. 349ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Returns NULL on failure, else the address of the bottom of the 350ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown stack. On success, also sets *initial_sp to what the stack pointer 351ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown should be set to. */ 352ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 353ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownVgStack* VG_(am_alloc_VgStack)( /*OUT*/Addr* initial_sp ) 354ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 355ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Int szB; 356ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SysRes sres; 357ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VgStack* stack; 358ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown UInt* p; 359ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown Int i; 360ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 361ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Allocate the stack. */ 362ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown szB = VG_STACK_GUARD_SZB 363ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown + VG_STACK_ACTIVE_SZB + VG_STACK_GUARD_SZB; 364ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 365ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown sres = VG_(am_mmap_anon_float_valgrind)( szB ); 366ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (sr_isError(sres)) 367ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return NULL; 368ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 369ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown stack = (VgStack*)(AddrH)sr_Res(sres); 370ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 371ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown aspacem_assert(VG_IS_PAGE_ALIGNED(szB)); 372ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown aspacem_assert(VG_IS_PAGE_ALIGNED(stack)); 373ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 374ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Protect the guard areas. */ 375ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown sres = local_do_mprotect_NO_NOTIFY( 376ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (Addr) &stack[0], 377ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_STACK_GUARD_SZB, VKI_PROT_NONE 378ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ); 379ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (sr_isError(sres)) goto protect_failed; 380ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(am_notify_mprotect)( 381ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (Addr) &stack->bytes[0], 382ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_STACK_GUARD_SZB, VKI_PROT_NONE 383ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ); 384ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 385ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown sres = local_do_mprotect_NO_NOTIFY( 386ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (Addr) &stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB], 387ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_STACK_GUARD_SZB, VKI_PROT_NONE 388ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ); 389ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (sr_isError(sres)) goto protect_failed; 390ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(am_notify_mprotect)( 391ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (Addr) &stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB], 392ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_STACK_GUARD_SZB, VKI_PROT_NONE 393ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ); 394ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 395ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* Looks good. Fill the active area with junk so we can later 396ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown tell how much got used. */ 397ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 398ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown p = (UInt*)&stack->bytes[VG_STACK_GUARD_SZB]; 399ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown for (i = 0; i < VG_STACK_ACTIVE_SZB/sizeof(UInt); i++) 400ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown p[i] = 0xDEADBEEF; 401ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 402ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *initial_sp = (Addr)&stack->bytes[VG_STACK_GUARD_SZB + VG_STACK_ACTIVE_SZB]; 403ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *initial_sp -= 8; 404ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown *initial_sp &= ~((Addr)0x1F); /* 32-align it */ 405ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 406ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown VG_(debugLog)( 1,"aspacem","allocated thread stack at 0x%llx size %d\n", 407ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (ULong)(Addr)stack, szB); 408ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ML_(am_do_sanity_check)(); 409ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return stack; 410ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 411ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown protect_failed: 412ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown /* The stack was allocated, but we can't protect it. Unmap it and 413ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return NULL (failure). */ 414ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown (void)ML_(am_do_munmap_NO_NOTIFY)( (Addr)stack, szB ); 415ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown ML_(am_do_sanity_check)(); 416ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return NULL; 417ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 418ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 419ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 420ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/* Figure out how many bytes of the stack's active area have not 421ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown been used. Used for estimating if we are close to overflowing it. */ 422ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 423ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff BrownSizeT VG_(am_get_VgStack_unused_szB)( VgStack* stack, SizeT limit ) 424ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown{ 425ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown SizeT i; 426ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown UInt* p; 427ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 428ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown p = (UInt*)&stack->bytes[VG_STACK_GUARD_SZB]; 429ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown for (i = 0; i < VG_STACK_ACTIVE_SZB/sizeof(UInt); i++) { 430ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (p[i] != 0xDEADBEEF) 431ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown break; 432ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown if (i * sizeof(UInt) >= limit) 433ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown break; 434ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown } 435ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 436ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown return i * sizeof(UInt); 437ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown} 438ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 439ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown 440ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--------------------------------------------------------------------*/ 441ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--- end ---*/ 442ed07e00d438c74b7a23c01bfffde77e3968305e4Jeff Brown/*--------------------------------------------------------------------*/ 443