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/*--- Misc client state info pub_core_clientstate.h ---*/
This file is part of Valgrind, a dynamic binary instrumentation
Copyright (C) 2000-2013 Julian Seward
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
// PURPOSE: This module holds various bits of client state which don't
// live comfortably anywhere else. Note that the ThreadStates for the
// client don't live here; they instead live in m_threadstate.h. Most
// of these values are set once at startup and not changed later.
#include "pub_tool_clientstate.h"
// Address space globals
// client stack range
extern Addr VG_(clstk_start_base); // *Initial* lowest byte address
extern Addr VG_(clstk_end); // Highest byte address
extern UWord VG_(clstk_id); // client stack id
/* linux only: where is the client auxv ? */
/* This is setup as part of setup_client_stack in initimg-linux.c. */
extern UWord* VG_(client_auxv);
extern Addr VG_(brk_base); // start of brk
extern Addr VG_(brk_limit); // current brk
/* A fd which refers to the client executable. */
extern Int VG_(cl_exec_fd);
/* A fd which refers to the fake /proc/<pid>/cmdline in /tmp. The
idea is: make up the /proc/<pid>/cmdline file the client would
expect to see if it was running natively. Copy into a file in
/tmp. When the client then does an open of /proc/<pid>/cmdline or
/proc/self/cmdline, instead give it a file handle to the file in
/tmp. The problem of deleting said file when Valgrind exits is
neatly sidestepped by unlinking it as soon as it has been created,
but holding on to the file handle. That causes the kernel to keep
the file contents alive exactly until the process exits. */
extern Int VG_(cl_cmdline_fd);
/* Same as above, but for /proc/<pid>/auxv. */
extern Int VG_(cl_auxv_fd);
// Client's original rlimit data and rlimit stack
extern struct vki_rlimit VG_(client_rlimit_data);
extern struct vki_rlimit VG_(client_rlimit_stack);
// Name of the launcher, as extracted from VALGRIND_LAUNCHER at
// startup.
extern HChar* VG_(name_of_launcher);
/* Application-visible file descriptor limits */
extern Int VG_(fd_soft_limit);
extern Int VG_(fd_hard_limit);
/* Useful addresses extracted from the client */
/* Where is the __libc_freeres_wrapper routine we made? */
extern Addr VG_(client___libc_freeres_wrapper);
/* x86-linux only: where is's _dl_sysinfo_int80 function?
Finding it isn't essential, but knowing where it is does sometimes
help produce better back traces. See big comment in
VG_(get_StackTrace) in m_stacktrace.c for further info. */
extern Addr VG_(client__dl_sysinfo_int80);
/* glibc nptl pthread systems only, when no-nptl-pthread-stackcache
was given in --sim-hints.
Used for a (kludgy) way to disable the cache of stacks as implemented in
nptl glibc.
Based on internal knowledge of the pthread glibc nptl/allocatestack.c code:
a huge value in stack_cache_actsize (bigger than the constant
stack_cache_maxsize) makes glibc believes the cache is full
and so stacks are always released when a pthread terminates.
Several ugliness in this kludge:
* hardcodes private glibc var name "stack_cache_maxsize"
* based on knowledge of the code of the functions
queue_stack and __free_stacks
* static symbol for "stack_cache_maxsize" must be in
the debug info.
It would be much cleaner to have a documented and supported
way to disable the pthread stack cache. */
extern SizeT* VG_(client__stack_cache_actsize__addr);
/*--- end ---*/