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9aa0d6d680
Greetings,
Here is the second part, actually implementing the configure option.
Thanks,
--
Paul Pluzhnikov
commit cf823ed0d4d2447aa91af0e3cb5fbb6a6cba5068
Author: Paul Pluzhnikov <ppluzhnikov@google.com>
Date: Mon Sep 21 11:37:38 2009 -0700
New configure option to allow caller to block signals.
300 lines
8.6 KiB
C
300 lines
8.6 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright (C) 2001-2005 Hewlett-Packard Co
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Copyright (C) 2007 David Mosberger-Tang
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Contributed by David Mosberger-Tang <dmosberger@gmail.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/* This files contains libunwind-internal definitions which are
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subject to frequent change and are not to be exposed to
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libunwind-users. */
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#ifndef libunwind_i_h
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#define libunwind_i_h
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE___THREAD
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/* For now, turn off per-thread caching. It uses up too much TLS
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memory per thread even when the thread never uses libunwind at
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all. */
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# undef HAVE___THREAD
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#endif
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/* Platform-independent libunwind-internal declarations. */
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#include <sys/types.h> /* HP-UX needs this before include of pthread.h */
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#include <assert.h>
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#include <libunwind.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef HAVE_ENDIAN_H
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# include <endian.h>
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#else
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# define __LITTLE_ENDIAN 1234
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# define __BIG_ENDIAN 4321
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# if defined(__hpux)
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# define __BYTE_ORDER __BIG_ENDIAN
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# else
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# error Host has unknown byte-order.
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# endif
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#endif
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#ifdef __GNUC__
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# define UNUSED __attribute__((unused))
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# define NORETURN __attribute__((noreturn))
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# define ALIAS(name) __attribute__((alias (#name)))
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# if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
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# define ALWAYS_INLINE inline __attribute__((always_inline))
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# define HIDDEN __attribute__((visibility ("hidden")))
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# define PROTECTED __attribute__((visibility ("protected")))
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# else
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# define ALWAYS_INLINE
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# define HIDDEN
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# define PROTECTED
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# endif
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# if (__GNUC__ >= 3)
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# define likely(x) __builtin_expect ((x), 1)
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# define unlikely(x) __builtin_expect ((x), 0)
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# else
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# define likely(x) (x)
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# define unlikely(x) (x)
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# endif
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#else
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# define ALWAYS_INLINE
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# define UNUSED
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# define NORETURN
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# define ALIAS(name)
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# define HIDDEN
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# define PROTECTED
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# define likely(x) (x)
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# define unlikely(x) (x)
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#endif
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#ifdef DEBUG
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# define UNW_DEBUG 1
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#else
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# define UNW_DEBUG 0
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#endif
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#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
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/* Make it easy to write thread-safe code which may or may not be
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linked against libpthread. The macros below can be used
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unconditionally and if -lpthread is around, they'll call the
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corresponding routines otherwise, they do nothing. */
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#pragma weak pthread_mutex_init
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#pragma weak pthread_mutex_lock
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#pragma weak pthread_mutex_unlock
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#define mutex_init(l) \
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(pthread_mutex_init != 0 ? pthread_mutex_init ((l), 0) : 0)
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#define mutex_lock(l) \
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(pthread_mutex_lock != 0 ? pthread_mutex_lock (l) : 0)
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#define mutex_unlock(l) \
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(pthread_mutex_unlock != 0 ? pthread_mutex_unlock (l) : 0)
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#ifdef HAVE_ATOMIC_OPS_H
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# include <atomic_ops.h>
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static inline int
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cmpxchg_ptr (void *addr, void *old, void *new)
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{
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union
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{
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void *vp;
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AO_t *aop;
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}
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u;
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u.vp = addr;
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return AO_compare_and_swap(u.aop, (AO_t) old, (AO_t) new);
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}
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# define fetch_and_add1(_ptr) AO_fetch_and_add1(_ptr)
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/* GCC 3.2.0 on HP-UX crashes on cmpxchg_ptr() */
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# if !(defined(__hpux) && __GNUC__ == 3 && __GNUC_MINOR__ == 2)
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# define HAVE_CMPXCHG
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# endif
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# define HAVE_FETCH_AND_ADD1
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#else
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# ifdef HAVE_IA64INTRIN_H
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# include <ia64intrin.h>
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static inline int
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cmpxchg_ptr (void *addr, void *old, void *new)
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{
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union
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{
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void *vp;
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long *vlp;
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}
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u;
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u.vp = addr;
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return __sync_bool_compare_and_swap(u.vlp, (long) old, (long) new);
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}
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# define fetch_and_add1(_ptr) __sync_fetch_and_add(_ptr, 1)
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# define HAVE_CMPXCHG
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# define HAVE_FETCH_AND_ADD1
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# endif
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#endif
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#define atomic_read(ptr) (*(ptr))
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#define UNWI_OBJ(fn) UNW_PASTE(UNW_PREFIX,UNW_PASTE(I,fn))
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#define UNWI_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_UI,UNW_TARGET),_), fn)
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#define unwi_full_mask UNWI_ARCH_OBJ(full_mask)
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/* Type of a mask that can be used to inhibit preemption. At the
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userlevel, preemption is caused by signals and hence sigset_t is
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appropriate. In constrast, the Linux kernel uses "unsigned long"
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to hold the processor "flags" instead. */
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typedef sigset_t intrmask_t;
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extern intrmask_t unwi_full_mask;
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#if defined(CONFIG_BLOCK_SIGNALS)
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# define SIGPROCMASK(how, old_mask, new_mask) \
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sigprocmask((how), (old_mask), (new_mask))
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#else
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# define SIGPROCMASK(how, old_mask, new_mask) /**/
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#endif
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#define define_lock(name) \
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pthread_mutex_t name = PTHREAD_MUTEX_INITIALIZER
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#define lock_init(l) mutex_init (l)
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#define lock_acquire(l,m) \
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do { \
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SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &(m)); \
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mutex_lock (l); \
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} while (0)
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#define lock_release(l,m) \
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do { \
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mutex_unlock (l); \
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SIGPROCMASK (SIG_SETMASK, &(m), NULL); \
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} while (0)
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#define SOS_MEMORY_SIZE 16384 /* see src/mi/mempool.c */
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#define GET_MEMORY(mem, size_in_bytes) \
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do { \
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/* Hopefully, mmap() goes straight through to a system call stub... */ \
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mem = mmap (0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, \
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-1, 0); \
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if (mem == MAP_FAILED) \
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mem = NULL; \
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} while (0)
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#define unwi_find_dynamic_proc_info UNWI_OBJ(find_dynamic_proc_info)
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#define unwi_extract_dynamic_proc_info UNWI_OBJ(extract_dynamic_proc_info)
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#define unwi_put_dynamic_unwind_info UNWI_OBJ(put_dynamic_unwind_info)
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#define unwi_dyn_remote_find_proc_info UNWI_OBJ(dyn_remote_find_proc_info)
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#define unwi_dyn_remote_put_unwind_info UNWI_OBJ(dyn_remote_put_unwind_info)
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#define unwi_dyn_validate_cache UNWI_OBJ(dyn_validate_cache)
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extern int unwi_find_dynamic_proc_info (unw_addr_space_t as,
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unw_word_t ip,
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unw_proc_info_t *pi,
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int need_unwind_info, void *arg);
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extern int unwi_extract_dynamic_proc_info (unw_addr_space_t as,
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unw_word_t ip,
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unw_proc_info_t *pi,
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unw_dyn_info_t *di,
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int need_unwind_info,
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void *arg);
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extern void unwi_put_dynamic_unwind_info (unw_addr_space_t as,
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unw_proc_info_t *pi, void *arg);
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/* These handle the remote (cross-address-space) case of accessing
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dynamic unwind info. */
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extern int unwi_dyn_remote_find_proc_info (unw_addr_space_t as,
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unw_word_t ip,
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unw_proc_info_t *pi,
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int need_unwind_info,
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void *arg);
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extern void unwi_dyn_remote_put_unwind_info (unw_addr_space_t as,
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unw_proc_info_t *pi,
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void *arg);
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extern int unwi_dyn_validate_cache (unw_addr_space_t as, void *arg);
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extern unw_dyn_info_list_t _U_dyn_info_list;
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extern pthread_mutex_t _U_dyn_info_list_lock;
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#if UNW_DEBUG
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#define unwi_debug_level UNWI_ARCH_OBJ(debug_level)
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extern long unwi_debug_level;
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# include <stdio.h>
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# define Debug(level,format...) \
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do { \
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if (unwi_debug_level >= level) \
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{ \
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int _n = level; \
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if (_n > 16) \
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_n = 16; \
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fprintf (stderr, "%*c>%s: ", _n, ' ', __FUNCTION__); \
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fprintf (stderr, format); \
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} \
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} while (0)
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# define Dprintf(format...) fprintf (stderr, format)
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# ifdef __GNUC__
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# undef inline
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# define inline UNUSED
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# endif
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#else
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# define Debug(level,format...)
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# define Dprintf(format...)
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#endif
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static ALWAYS_INLINE void
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print_error (const char *string)
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{
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write (2, string, strlen (string));
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}
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#define mi_init UNWI_ARCH_OBJ(mi_init)
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extern void mi_init (void); /* machine-independent initializations */
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extern unw_word_t _U_dyn_info_list_addr (void);
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/* This is needed/used by ELF targets only. */
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struct elf_image
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{
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void *image; /* pointer to mmap'd image */
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size_t size; /* (file-) size of the image */
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};
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#include "tdep/libunwind_i.h"
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#ifndef tdep_get_func_addr
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# define tdep_get_func_addr(as,addr,v) (*(v) = addr, 0)
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#endif
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#endif /* libunwind_i_h */
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