diff options
Diffstat (limited to 'src/third_party/unwind/dist/include/libunwind_i.h')
| -rw-r--r-- | src/third_party/unwind/dist/include/libunwind_i.h | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/include/libunwind_i.h b/src/third_party/unwind/dist/include/libunwind_i.h new file mode 100644 index 00000000000..36cf7a14de7 --- /dev/null +++ b/src/third_party/unwind/dist/include/libunwind_i.h @@ -0,0 +1,365 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2001-2005 Hewlett-Packard Co + Copyright (C) 2007 David Mosberger-Tang + Contributed by David Mosberger-Tang <dmosberger@gmail.com> + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +/* This files contains libunwind-internal definitions which are + subject to frequent change and are not to be exposed to + libunwind-users. */ + +#ifndef libunwind_i_h +#define libunwind_i_h + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "compiler.h" + +#if defined(HAVE___THREAD) && HAVE___THREAD +#define UNWI_DEFAULT_CACHING_POLICY UNW_CACHE_PER_THREAD +#else +#define UNWI_DEFAULT_CACHING_POLICY UNW_CACHE_GLOBAL +#endif + +/* Platform-independent libunwind-internal declarations. */ + +#include <sys/types.h> /* HP-UX needs this before include of pthread.h */ + +#include <assert.h> +#include <libunwind.h> +#include <pthread.h> +#include <signal.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/mman.h> + +#if defined(HAVE_ELF_H) +# include <elf.h> +#elif defined(HAVE_SYS_ELF_H) +# include <sys/elf.h> +#else +# error Could not locate <elf.h> +#endif + +#if defined(HAVE_ENDIAN_H) +# include <endian.h> +#elif defined(HAVE_SYS_ENDIAN_H) +# include <sys/endian.h> +# if defined(_LITTLE_ENDIAN) && !defined(__LITTLE_ENDIAN) +# define __LITTLE_ENDIAN _LITTLE_ENDIAN +# endif +# if defined(_BIG_ENDIAN) && !defined(__BIG_ENDIAN) +# define __BIG_ENDIAN _BIG_ENDIAN +# endif +# if defined(_BYTE_ORDER) && !defined(__BYTE_ORDER) +# define __BYTE_ORDER _BYTE_ORDER +# endif +#else +# define __LITTLE_ENDIAN 1234 +# define __BIG_ENDIAN 4321 +# if defined(__hpux) +# define __BYTE_ORDER __BIG_ENDIAN +# elif defined(__QNX__) +# if defined(__BIGENDIAN__) +# define __BYTE_ORDER __BIG_ENDIAN +# elif defined(__LITTLEENDIAN__) +# define __BYTE_ORDER __LITTLE_ENDIAN +# else +# error Host has unknown byte-order. +# endif +# else +# error Host has unknown byte-order. +# endif +#endif + +#if defined(HAVE__BUILTIN_UNREACHABLE) +# define unreachable() __builtin_unreachable() +#else +# define unreachable() do { } while (1) +#endif + +#ifdef DEBUG +# define UNW_DEBUG 1 +#else +# define UNW_DEBUG 0 +#endif + +/* Make it easy to write thread-safe code which may or may not be + linked against libpthread. The macros below can be used + unconditionally and if -lpthread is around, they'll call the + corresponding routines otherwise, they do nothing. */ + +#pragma weak pthread_mutex_init +#pragma weak pthread_mutex_lock +#pragma weak pthread_mutex_unlock + +#define mutex_init(l) \ + (pthread_mutex_init != NULL ? pthread_mutex_init ((l), NULL) : 0) +#define mutex_lock(l) \ + (pthread_mutex_lock != NULL ? pthread_mutex_lock (l) : 0) +#define mutex_unlock(l) \ + (pthread_mutex_unlock != NULL ? pthread_mutex_unlock (l) : 0) + +#ifdef HAVE_ATOMIC_OPS_H +# include <atomic_ops.h> +static inline int +cmpxchg_ptr (void *addr, void *old, void *new) +{ + union + { + void *vp; + AO_t *aop; + } + u; + + u.vp = addr; + return AO_compare_and_swap(u.aop, (AO_t) old, (AO_t) new); +} +# define fetch_and_add1(_ptr) AO_fetch_and_add1(_ptr) +# define fetch_and_add(_ptr, value) AO_fetch_and_add(_ptr, value) + /* GCC 3.2.0 on HP-UX crashes on cmpxchg_ptr() */ +# if !(defined(__hpux) && __GNUC__ == 3 && __GNUC_MINOR__ == 2) +# define HAVE_CMPXCHG +# endif +# define HAVE_FETCH_AND_ADD +#elif defined(HAVE_SYNC_ATOMICS) || defined(HAVE_IA64INTRIN_H) +# ifdef HAVE_IA64INTRIN_H +# include <ia64intrin.h> +# endif +static inline int +cmpxchg_ptr (void *addr, void *old, void *new) +{ + union + { + void *vp; + long *vlp; + } + u; + + u.vp = addr; + return __sync_bool_compare_and_swap(u.vlp, (long) old, (long) new); +} +# define fetch_and_add1(_ptr) __sync_fetch_and_add(_ptr, 1) +# define fetch_and_add(_ptr, value) __sync_fetch_and_add(_ptr, value) +# define HAVE_CMPXCHG +# define HAVE_FETCH_AND_ADD +#endif +#define atomic_read(ptr) (*(ptr)) + +#define UNWI_OBJ(fn) UNW_PASTE(UNW_PREFIX,UNW_PASTE(I,fn)) +#define UNWI_ARCH_OBJ(fn) UNW_PASTE(UNW_PASTE(UNW_PASTE(_UI,UNW_TARGET),_), fn) + +#define unwi_full_mask UNWI_ARCH_OBJ(full_mask) + +/* Type of a mask that can be used to inhibit preemption. At the + userlevel, preemption is caused by signals and hence sigset_t is + appropriate. In constrast, the Linux kernel uses "unsigned long" + to hold the processor "flags" instead. */ +typedef sigset_t intrmask_t; + +extern intrmask_t unwi_full_mask; + +/* Silence compiler warnings about variables which are used only if libunwind + is configured in a certain way */ +static inline void mark_as_used(void *v UNUSED) { +} + +#if defined(CONFIG_BLOCK_SIGNALS) +# define SIGPROCMASK(how, new_mask, old_mask) \ + sigprocmask((how), (new_mask), (old_mask)) +#else +# define SIGPROCMASK(how, new_mask, old_mask) mark_as_used(old_mask) +#endif + +/* Prefer adaptive mutexes if available */ +#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP +#define UNW_PTHREAD_MUTEX_INITIALIZER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP +#else +#define UNW_PTHREAD_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER +#endif + +#define define_lock(name) \ + pthread_mutex_t name = UNW_PTHREAD_MUTEX_INITIALIZER +#define lock_init(l) mutex_init (l) +#define lock_acquire(l,m) \ +do { \ + SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &(m)); \ + mutex_lock (l); \ +} while (0) +#define lock_release(l,m) \ +do { \ + mutex_unlock (l); \ + SIGPROCMASK (SIG_SETMASK, &(m), NULL); \ +} while (0) + +#define SOS_MEMORY_SIZE 16384 /* see src/mi/mempool.c */ + +#ifndef MAP_ANONYMOUS +# define MAP_ANONYMOUS MAP_ANON +#endif +#define GET_MEMORY(mem, size) \ +do { \ + /* Hopefully, mmap() goes straight through to a system call stub... */ \ + mem = mmap (NULL, size, PROT_READ | PROT_WRITE, \ + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \ + if (mem == MAP_FAILED) \ + mem = NULL; \ +} while (0) + +#define unwi_find_dynamic_proc_info UNWI_OBJ(find_dynamic_proc_info) +#define unwi_extract_dynamic_proc_info UNWI_OBJ(extract_dynamic_proc_info) +#define unwi_put_dynamic_unwind_info UNWI_OBJ(put_dynamic_unwind_info) +#define unwi_dyn_remote_find_proc_info UNWI_OBJ(dyn_remote_find_proc_info) +#define unwi_dyn_remote_put_unwind_info UNWI_OBJ(dyn_remote_put_unwind_info) +#define unwi_dyn_validate_cache UNWI_OBJ(dyn_validate_cache) + +extern int unwi_find_dynamic_proc_info (unw_addr_space_t as, + unw_word_t ip, + unw_proc_info_t *pi, + int need_unwind_info, void *arg); +extern int unwi_extract_dynamic_proc_info (unw_addr_space_t as, + unw_word_t ip, + unw_proc_info_t *pi, + unw_dyn_info_t *di, + int need_unwind_info, + void *arg); +extern void unwi_put_dynamic_unwind_info (unw_addr_space_t as, + unw_proc_info_t *pi, void *arg); + +/* These handle the remote (cross-address-space) case of accessing + dynamic unwind info. */ + +extern int unwi_dyn_remote_find_proc_info (unw_addr_space_t as, + unw_word_t ip, + unw_proc_info_t *pi, + int need_unwind_info, + void *arg); +extern void unwi_dyn_remote_put_unwind_info (unw_addr_space_t as, + unw_proc_info_t *pi, + void *arg); +extern int unwi_dyn_validate_cache (unw_addr_space_t as, void *arg); + +extern unw_dyn_info_list_t _U_dyn_info_list; +extern pthread_mutex_t _U_dyn_info_list_lock; + +#if UNW_DEBUG +#define unwi_debug_level UNWI_ARCH_OBJ(debug_level) +extern long unwi_debug_level; + +# include <stdio.h> +# define Debug(level,format...) \ +do { \ + if (unwi_debug_level >= level) \ + { \ + int _n = level; \ + if (_n > 16) \ + _n = 16; \ + fprintf (stderr, "%*c>%s: ", _n, ' ', __FUNCTION__); \ + fprintf (stderr, format); \ + } \ +} while (0) +# define Dprintf(format...) fprintf (stderr, format) +#else +# define Debug(level,format...) +# define Dprintf(format...) +#endif + +static ALWAYS_INLINE int +print_error (const char *string) +{ + return write (2, string, strlen (string)); +} + +#define mi_init UNWI_ARCH_OBJ(mi_init) + +extern void mi_init (void); /* machine-independent initializations */ +extern unw_word_t _U_dyn_info_list_addr (void); + +/* This is needed/used by ELF targets only. */ + +struct elf_image + { + void *image; /* pointer to mmap'd image */ + size_t size; /* (file-) size of the image */ + }; + +struct elf_dyn_info + { + struct elf_image ei; + unw_dyn_info_t di_cache; + unw_dyn_info_t di_debug; /* additional table info for .debug_frame */ +#if UNW_TARGET_IA64 + unw_dyn_info_t ktab; +#endif +#if UNW_TARGET_ARM + unw_dyn_info_t di_arm; /* additional table info for .ARM.exidx */ +#endif + }; + +static inline void invalidate_edi (struct elf_dyn_info *edi) +{ + if (edi->ei.image) + munmap (edi->ei.image, edi->ei.size); + memset (edi, 0, sizeof (*edi)); + edi->di_cache.format = -1; + edi->di_debug.format = -1; +#if UNW_TARGET_ARM + edi->di_arm.format = -1; +#endif +} + + +/* Provide a place holder for architecture to override for fast access + to memory when known not to need to validate and know the access + will be local to the process. A suitable override will improve + unw_tdep_trace() performance in particular. */ +#define ACCESS_MEM_FAST(ret,validate,cur,addr,to) \ + do { (ret) = dwarf_get ((cur), DWARF_MEM_LOC ((cur), (addr)), &(to)); } \ + while (0) + +/* Define GNU and processor specific values for the Phdr p_type field in case + they aren't defined by <elf.h>. */ +#ifndef PT_GNU_EH_FRAME +# define PT_GNU_EH_FRAME 0x6474e550 +#endif /* !PT_GNU_EH_FRAME */ +#ifndef PT_ARM_EXIDX +# define PT_ARM_EXIDX 0x70000001 /* ARM unwind segment */ +#endif /* !PT_ARM_EXIDX */ + +#include "tdep/libunwind_i.h" + +#ifndef tdep_get_func_addr +# define tdep_get_func_addr(as,addr,v) (*(v) = addr, 0) +#endif + +#ifndef DWARF_VAL_LOC +# define DWARF_IS_VAL_LOC(l) 0 +# define DWARF_VAL_LOC(c,v) DWARF_NULL_LOC +#endif + +#define UNW_ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL)) + +#endif /* libunwind_i_h */ |