/* libunwind - a platform-independent unwind library Copyright (C) 2001-2005 Hewlett-Packard Co Copyright (C) 2007 David Mosberger-Tang Contributed by David Mosberger-Tang 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" #ifdef HAVE___THREAD /* For now, turn off per-thread caching. It uses up too much TLS memory per thread even when the thread never uses libunwind at all. */ # undef HAVE___THREAD #endif /* Platform-independent libunwind-internal declarations. */ #include /* HP-UX needs this before include of pthread.h */ #include #include #include #include #include #include #include #include #include #if defined(HAVE_ELF_H) # include #elif defined(HAVE_SYS_ELF_H) # include #else # error Could not locate #endif #if defined(HAVE_ENDIAN_H) # include #elif defined(HAVE_SYS_ENDIAN_H) # include #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 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 # 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 /* ANDROID support update. */ #define __lock_acquire_internal(l, m, acquire_func) \ do { \ SIGPROCMASK (SIG_SETMASK, &unwi_full_mask, &(m)); \ acquire_func (l); \ } while (0) #define __lock_release_internal(l, m, release_func) \ do { \ release_func (l); \ SIGPROCMASK (SIG_SETMASK, &(m), NULL); \ } while (0) #define lock_rdwr_var(name) \ pthread_rwlock_t name #define lock_rdwr_init(l) pthread_rwlock_init (l, NULL) #define lock_rdwr_wr_acquire(l, m) \ __lock_acquire_internal(l, m, pthread_rwlock_wrlock) #define lock_rdwr_rd_acquire(l, m) \ __lock_acquire_internal(l, m, pthread_rwlock_rdlock) #define lock_rdwr_release(l, m) \ __lock_release_internal(l, m, pthread_rwlock_unlock) #define lock_var(name) \ pthread_mutex_t name #define define_lock(name) \ lock_var (name) = PTHREAD_MUTEX_INITIALIZER #define lock_init(l) mutex_init (l) #define lock_acquire(l,m) \ __lock_acquire_internal(l, m, mutex_lock) #define lock_release(l,m) \ __lock_release_internal(l, m, mutex_unlock) /* End of ANDROID update. */ #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; # ifdef ANDROID # define LOG_TAG "libunwind" # include # define Debug(level, format, ...) \ do { \ if (unwi_debug_level >= (level)) \ { \ ALOGI("%*c>%s: " format, ((level) <= 16) ? (level) : 16, ' ', \ __FUNCTION__, ##__VA_ARGS__); \ } \ } while (0) # define Dprintf(format, ...) ALOGI(format, ##__VA_ARGS__); #else # include # 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) # ifdef __GNUC__ # undef inline # define inline UNUSED # endif # endif #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. */ /* This structure should contain memory that will not change during local * unwinds. For example, if a new member is added, then the function * move_cached_elf_data must be updated to make sure that the data is * properly copied. Any pointers in this structures must persist until * the map is destroyed in map_destroy_list and moved in the previously * mentioned move_cached_elf_data. */ struct elf_image { bool valid; /* true if the image is a valid elf image */ bool load_attempted; /* true if we've already attempted to load the elf */ bool mapped; /* true if the elf image was mmap'd in */ void* mini_debug_info_data; /* decompressed .gnu_debugdata section */ size_t mini_debug_info_size; union { struct { void *image; /* pointer to mmap'd image */ size_t size; /* (file-) size of the image */ } mapped; struct { unw_addr_space_t as; /* address space containing the access_mem function */ void *as_arg; /* arg used with access_mem */ uintptr_t start; /* The map start address. */ uintptr_t end; /* The map end address. */ } memory; } u; }; struct elf_dyn_info { /* ANDROID support update.*/ /* Removed: struct elf_image ei; */ /* End of ANDROID update. */ 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) { /* ANDROID support update.*/ /* Removed: if (edi->ei.image) */ /* munmap (edi->ei.image, edi->ei.size); */ /* End of ANDROID update. */ 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 . */ #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 #define UNW_ALIGN(x,a) (((x)+(a)-1UL)&~((a)-1UL)) #endif /* libunwind_i_h */