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ce806ed31f
about leaked or reachable blocks)
This patch implements two new memcheck gdbserver monitor commands:
block_list <loss_record_nr>
after a leak search, shows the list of blocks of <loss_record_nr>
who_points_at <addr> [<len>]
shows places pointing inside <len> (default 1) bytes at <addr>
(with len 1, only shows "start pointers" pointing exactly to <addr>,
with len > 1, will also show "interior pointers")
Compiled and reg-tested on f12/x86, deb5/amd64, f16/ppc64.
The 'block_list' command is implemented on top of the
lr_array/lc_chunks/lc_extras arrays used during the last leak search.
NB: no impact on the memory for the typical Valgrind usage where a leak
search is only done at the end of the run.
Printing the block_list of a loss record simply consists in scanning the
lc_chunks to find back the chunks corresponding to the loss record for which
block lists is requested.
The 'who_points_at' command is implemented by doing a scan similar to
(but simpler than) the leak search scan.
lc_scan_memory has been enhanced to have a mode to search for a specific
address, rather than to search for all allocated blocks.
VG_(apply_to_GP_regs) has been enhanced to also provide the ThreadId and
register name in the callback function.
The patch touches multiple files (but most changes are easy/trivial or factorise
existing code).
Most significant changes are in memcheck/mc_leakcheck.c :
* changed the LC_Extra struct to remember the clique for indirect leaks
(size of structure not changed).
* made lr_array a static global
* changed lc_scan_memory:
to have a search mode for a specific address (for who_points_at)
(for leak search) to pass a 'current clique' in addition to the clique
leader
so as to have a proper clique hierarchy for indirectly leaked blocks.
* print_results: reset values at the beginning of the print_result of the
next leak search, rather than at the end of print_results of the previous
leak search.
This allows to continue showing the same info for loss records till a new
leak search is done.
* new function print_clique which recursively prints a group of leaked
blocks, starting from the clique leader.
* new function MC_(print_block_list) : calls print_clique for each clique
leader found for the given loss record.
* static void scan_memory_root_set : code extracted from
MC_(detect_memory_leaks) (no relevant change)
* void MC_(who_points_at) : calls scan_memory_root_set, lc_scan_memory
and VG_(apply_to_GP_regs)(search_address_in_GP_reg) to search
pointers to the given address.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12357
160 lines
6.5 KiB
C
160 lines
6.5 KiB
C
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/*--------------------------------------------------------------------*/
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/*--- Machine-related stuff. pub_tool_machine.h ---*/
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/*--------------------------------------------------------------------*/
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/*
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This file is part of Valgrind, a dynamic binary instrumentation
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framework.
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Copyright (C) 2000-2011 Julian Seward
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jseward@acm.org
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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#ifndef __PUB_TOOL_MACHINE_H
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#define __PUB_TOOL_MACHINE_H
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#if defined(VGP_x86_linux)
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# define VG_MIN_INSTR_SZB 1 // min length of native instruction
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# define VG_MAX_INSTR_SZB 16 // max length of native instruction
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# define VG_CLREQ_SZB 14 // length of a client request, may
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// be larger than VG_MAX_INSTR_SZB
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# define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP
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#elif defined(VGP_amd64_linux)
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# define VG_MIN_INSTR_SZB 1
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# define VG_MAX_INSTR_SZB 16
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# define VG_CLREQ_SZB 19
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# define VG_STACK_REDZONE_SZB 128
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#elif defined(VGP_ppc32_linux)
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# define VG_MIN_INSTR_SZB 4
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# define VG_MAX_INSTR_SZB 4
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# define VG_CLREQ_SZB 20
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# define VG_STACK_REDZONE_SZB 0
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#elif defined(VGP_ppc64_linux)
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# define VG_MIN_INSTR_SZB 4
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# define VG_MAX_INSTR_SZB 4
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# define VG_CLREQ_SZB 20
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# define VG_STACK_REDZONE_SZB 288 // number of addressable bytes below R1
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// from 64-bit PowerPC ELF ABI
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// Supplement 1.7
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#elif defined(VGP_arm_linux)
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# define VG_MIN_INSTR_SZB 2
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# define VG_MAX_INSTR_SZB 4
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# define VG_CLREQ_SZB 20
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# define VG_STACK_REDZONE_SZB 0
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#elif defined(VGP_s390x_linux)
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# define VG_MIN_INSTR_SZB 2
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# define VG_MAX_INSTR_SZB 6
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# define VG_CLREQ_SZB 10
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# define VG_STACK_REDZONE_SZB 0 // s390 has no redzone
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#elif defined(VGP_x86_darwin)
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# define VG_MIN_INSTR_SZB 1 // min length of native instruction
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# define VG_MAX_INSTR_SZB 16 // max length of native instruction
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# define VG_CLREQ_SZB 14 // length of a client request, may
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// be larger than VG_MAX_INSTR_SZB
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# define VG_STACK_REDZONE_SZB 0 // number of addressable bytes below %RSP
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#elif defined(VGP_amd64_darwin)
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# define VG_MIN_INSTR_SZB 1
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# define VG_MAX_INSTR_SZB 16
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# define VG_CLREQ_SZB 19
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# define VG_STACK_REDZONE_SZB 128
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#else
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# error Unknown platform
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#endif
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// Guest state accessors
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// Are mostly in the core_ header.
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// Only these two are available to tools.
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Addr VG_(get_IP) ( ThreadId tid );
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Addr VG_(get_SP) ( ThreadId tid );
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// For get/set, 'area' is where the asked-for guest state will be copied
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// into/from. If shadowNo == 0, the real (non-shadow) guest state is
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// accessed. If shadowNo == 1, the first shadow area is accessed, and
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// if shadowNo == 2, the second shadow area is accessed. This gives a
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// completely general way to read/modify a thread's guest register state
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// providing you know the offsets you need.
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void
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VG_(get_shadow_regs_area) ( ThreadId tid,
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/*DST*/UChar* dst,
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/*SRC*/Int shadowNo, PtrdiffT offset, SizeT size );
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void
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VG_(set_shadow_regs_area) ( ThreadId tid,
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/*DST*/Int shadowNo, PtrdiffT offset, SizeT size,
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/*SRC*/const UChar* src );
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// Sets the shadow values for the syscall return value register(s).
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// This is platform specific.
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void VG_(set_syscall_return_shadows) ( ThreadId tid,
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/* shadow vals for the result */
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UWord s1res, UWord s2res,
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/* shadow vals for the error val */
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UWord s1err, UWord s2err );
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// Apply a function 'f' to all the general purpose registers in all the
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// current threads.
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// This is very Memcheck-specific -- it's used to find the roots when
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// doing leak checking.
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extern void VG_(apply_to_GP_regs)(void (*f)(ThreadId tid,
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HChar* regname, UWord val));
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// This iterator lets you inspect each live thread's stack bounds.
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// Returns False at the end. 'tid' is the iterator and you can only
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// safely change it by making calls to these functions.
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extern void VG_(thread_stack_reset_iter) ( /*OUT*/ThreadId* tid );
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extern Bool VG_(thread_stack_next) ( /*MOD*/ThreadId* tid,
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/*OUT*/Addr* stack_min,
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/*OUT*/Addr* stack_max );
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// Returns .client_stack_highest_word for the given thread
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extern Addr VG_(thread_get_stack_max) ( ThreadId tid );
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// Returns how many bytes have been allocated for the stack of the given thread
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extern SizeT VG_(thread_get_stack_size) ( ThreadId tid );
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// Returns the bottommost address of the alternate signal stack.
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// See also the man page of sigaltstack().
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extern Addr VG_(thread_get_altstack_min) ( ThreadId tid );
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// Returns how many bytes have been allocated for the alternate signal stack.
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// See also the man page of sigaltstack().
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extern SizeT VG_(thread_get_altstack_size) ( ThreadId tid );
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// Given a pointer to a function as obtained by "& functionname" in C,
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// produce a pointer to the actual entry point for the function. For
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// most platforms it's the identity function. Unfortunately, on
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// ppc64-linux it isn't (sigh).
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extern void* VG_(fnptr_to_fnentry)( void* );
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#endif // __PUB_TOOL_MACHINE_H
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/*--------------------------------------------------------------------*/
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/*--- end ---*/
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/*--------------------------------------------------------------------*/
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