diff options
Diffstat (limited to 'src/libunwind.cpp')
| -rw-r--r-- | src/libunwind.cpp | 214 |
1 files changed, 64 insertions, 150 deletions
diff --git a/src/libunwind.cpp b/src/libunwind.cpp index f4d71a1863bf..c90032bd66c9 100644 --- a/src/libunwind.cpp +++ b/src/libunwind.cpp @@ -1,9 +1,8 @@ //===--------------------------- libunwind.cpp ----------------------------===// // -// The LLVM Compiler Infrastructure -// -// This file is dual licensed under the MIT and the University of Illinois Open -// Source Licenses. See LICENSE.TXT for details. +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // // // Implements unw_* functions from <libunwind.h> @@ -12,12 +11,6 @@ #include <libunwind.h> -#ifndef NDEBUG -#include <cstdlib> // getenv -#endif -#include <new> -#include <algorithm> - #include "libunwind_ext.h" #include "config.h" @@ -36,15 +29,11 @@ LocalAddressSpace LocalAddressSpace::sThisAddressSpace; _LIBUNWIND_EXPORT unw_addr_space_t unw_local_addr_space = (unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace; -/// record the registers and stack position of the caller -extern int unw_getcontext(unw_context_t *); -// note: unw_getcontext() implemented in assembly - /// Create a cursor of a thread in this process given 'context' recorded by -/// unw_getcontext(). -_LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, - unw_context_t *context) { - _LIBUNWIND_TRACE_API("unw_init_local(cursor=%p, context=%p)", +/// __unw_getcontext(). +_LIBUNWIND_HIDDEN int __unw_init_local(unw_cursor_t *cursor, + unw_context_t *context) { + _LIBUNWIND_TRACE_API("__unw_init_local(cursor=%p, context=%p)", static_cast<void *>(cursor), static_cast<void *>(context)); #if defined(__i386__) @@ -73,101 +62,21 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, # error Architecture not supported #endif // Use "placement new" to allocate UnwindCursor in the cursor buffer. - new ((void *)cursor) UnwindCursor<LocalAddressSpace, REGISTER_KIND>( - context, LocalAddressSpace::sThisAddressSpace); + new (reinterpret_cast<UnwindCursor<LocalAddressSpace, REGISTER_KIND> *>(cursor)) + UnwindCursor<LocalAddressSpace, REGISTER_KIND>( + context, LocalAddressSpace::sThisAddressSpace); #undef REGISTER_KIND AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; co->setInfoBasedOnIPRegister(); return UNW_ESUCCESS; } - -#ifdef UNW_REMOTE -/// Create a cursor into a thread in another process. -_LIBUNWIND_EXPORT int unw_init_remote_thread(unw_cursor_t *cursor, - unw_addr_space_t as, - void *arg) { - // special case: unw_init_remote(xx, unw_local_addr_space, xx) - if (as == (unw_addr_space_t)&LocalAddressSpace::sThisAddressSpace) - return unw_init_local(cursor, NULL); //FIXME - - // use "placement new" to allocate UnwindCursor in the cursor buffer - switch (as->cpuType) { - case CPU_TYPE_I386: - new ((void *)cursor) - UnwindCursor<RemoteAddressSpace<Pointer32<LittleEndian>>, - Registers_x86>(((unw_addr_space_i386 *)as)->oas, arg); - break; - case CPU_TYPE_X86_64: - new ((void *)cursor) - UnwindCursor<RemoteAddressSpace<Pointer64<LittleEndian>>, - Registers_x86_64>(((unw_addr_space_x86_64 *)as)->oas, arg); - break; - case CPU_TYPE_POWERPC: - new ((void *)cursor) - UnwindCursor<RemoteAddressSpace<Pointer32<BigEndian>>, - Registers_ppc>(((unw_addr_space_ppc *)as)->oas, arg); - break; - default: - return UNW_EUNSPEC; - } - return UNW_ESUCCESS; -} - - -static bool is64bit(task_t task) { - return false; // FIXME -} - -/// Create an address_space object for use in examining another task. -_LIBUNWIND_EXPORT unw_addr_space_t unw_create_addr_space_for_task(task_t task) { -#if __i386__ - if (is64bit(task)) { - unw_addr_space_x86_64 *as = new unw_addr_space_x86_64(task); - as->taskPort = task; - as->cpuType = CPU_TYPE_X86_64; - //as->oas - } else { - unw_addr_space_i386 *as = new unw_addr_space_i386(task); - as->taskPort = task; - as->cpuType = CPU_TYPE_I386; - //as->oas - } -#else -// FIXME -#endif -} - - -/// Delete an address_space object. -_LIBUNWIND_EXPORT void unw_destroy_addr_space(unw_addr_space_t asp) { - switch (asp->cpuType) { -#if __i386__ || __x86_64__ - case CPU_TYPE_I386: { - unw_addr_space_i386 *as = (unw_addr_space_i386 *)asp; - delete as; - } - break; - case CPU_TYPE_X86_64: { - unw_addr_space_x86_64 *as = (unw_addr_space_x86_64 *)asp; - delete as; - } - break; -#endif - case CPU_TYPE_POWERPC: { - unw_addr_space_ppc *as = (unw_addr_space_ppc *)asp; - delete as; - } - break; - } -} -#endif // UNW_REMOTE - +_LIBUNWIND_WEAK_ALIAS(__unw_init_local, unw_init_local) /// Get value of specified register at cursor position in stack frame. -_LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum, - unw_word_t *value) { - _LIBUNWIND_TRACE_API("unw_get_reg(cursor=%p, regNum=%d, &value=%p)", +_LIBUNWIND_HIDDEN int __unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum, + unw_word_t *value) { + _LIBUNWIND_TRACE_API("__unw_get_reg(cursor=%p, regNum=%d, &value=%p)", static_cast<void *>(cursor), regNum, static_cast<void *>(value)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; @@ -177,12 +86,13 @@ _LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum, } return UNW_EBADREG; } - +_LIBUNWIND_WEAK_ALIAS(__unw_get_reg, unw_get_reg) /// Set value of specified register at cursor position in stack frame. -_LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum, - unw_word_t value) { - _LIBUNWIND_TRACE_API("unw_set_reg(cursor=%p, regNum=%d, value=0x%" PRIxPTR ")", +_LIBUNWIND_HIDDEN int __unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum, + unw_word_t value) { + _LIBUNWIND_TRACE_API("__unw_set_reg(cursor=%p, regNum=%d, value=0x%" PRIxPTR + ")", static_cast<void *>(cursor), regNum, value); typedef LocalAddressSpace::pint_t pint_t; AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; @@ -208,12 +118,12 @@ _LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum, } return UNW_EBADREG; } - +_LIBUNWIND_WEAK_ALIAS(__unw_set_reg, unw_set_reg) /// Get value of specified float register at cursor position in stack frame. -_LIBUNWIND_EXPORT int unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, - unw_fpreg_t *value) { - _LIBUNWIND_TRACE_API("unw_get_fpreg(cursor=%p, regNum=%d, &value=%p)", +_LIBUNWIND_HIDDEN int __unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, + unw_fpreg_t *value) { + _LIBUNWIND_TRACE_API("__unw_get_fpreg(cursor=%p, regNum=%d, &value=%p)", static_cast<void *>(cursor), regNum, static_cast<void *>(value)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; @@ -223,16 +133,16 @@ _LIBUNWIND_EXPORT int unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, } return UNW_EBADREG; } - +_LIBUNWIND_WEAK_ALIAS(__unw_get_fpreg, unw_get_fpreg) /// Set value of specified float register at cursor position in stack frame. -_LIBUNWIND_EXPORT int unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, - unw_fpreg_t value) { +_LIBUNWIND_HIDDEN int __unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, + unw_fpreg_t value) { #if defined(_LIBUNWIND_ARM_EHABI) - _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%llX)", + _LIBUNWIND_TRACE_API("__unw_set_fpreg(cursor=%p, regNum=%d, value=%llX)", static_cast<void *>(cursor), regNum, value); #else - _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%g)", + _LIBUNWIND_TRACE_API("__unw_set_fpreg(cursor=%p, regNum=%d, value=%g)", static_cast<void *>(cursor), regNum, value); #endif AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; @@ -242,20 +152,20 @@ _LIBUNWIND_EXPORT int unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum, } return UNW_EBADREG; } - +_LIBUNWIND_WEAK_ALIAS(__unw_set_fpreg, unw_set_fpreg) /// Move cursor to next frame. -_LIBUNWIND_EXPORT int unw_step(unw_cursor_t *cursor) { - _LIBUNWIND_TRACE_API("unw_step(cursor=%p)", static_cast<void *>(cursor)); +_LIBUNWIND_HIDDEN int __unw_step(unw_cursor_t *cursor) { + _LIBUNWIND_TRACE_API("__unw_step(cursor=%p)", static_cast<void *>(cursor)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; return co->step(); } - +_LIBUNWIND_WEAK_ALIAS(__unw_step, unw_step) /// Get unwind info at cursor position in stack frame. -_LIBUNWIND_EXPORT int unw_get_proc_info(unw_cursor_t *cursor, - unw_proc_info_t *info) { - _LIBUNWIND_TRACE_API("unw_get_proc_info(cursor=%p, &info=%p)", +_LIBUNWIND_HIDDEN int __unw_get_proc_info(unw_cursor_t *cursor, + unw_proc_info_t *info) { + _LIBUNWIND_TRACE_API("__unw_get_proc_info(cursor=%p, &info=%p)", static_cast<void *>(cursor), static_cast<void *>(info)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; co->getInfo(info); @@ -264,21 +174,21 @@ _LIBUNWIND_EXPORT int unw_get_proc_info(unw_cursor_t *cursor, else return UNW_ESUCCESS; } - +_LIBUNWIND_WEAK_ALIAS(__unw_get_proc_info, unw_get_proc_info) /// Resume execution at cursor position (aka longjump). -_LIBUNWIND_EXPORT int unw_resume(unw_cursor_t *cursor) { - _LIBUNWIND_TRACE_API("unw_resume(cursor=%p)", static_cast<void *>(cursor)); +_LIBUNWIND_HIDDEN int __unw_resume(unw_cursor_t *cursor) { + _LIBUNWIND_TRACE_API("__unw_resume(cursor=%p)", static_cast<void *>(cursor)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; co->jumpto(); return UNW_EUNSPEC; } - +_LIBUNWIND_WEAK_ALIAS(__unw_resume, unw_resume) /// Get name of function at cursor position in stack frame. -_LIBUNWIND_EXPORT int unw_get_proc_name(unw_cursor_t *cursor, char *buf, - size_t bufLen, unw_word_t *offset) { - _LIBUNWIND_TRACE_API("unw_get_proc_name(cursor=%p, &buf=%p, bufLen=%lu)", +_LIBUNWIND_HIDDEN int __unw_get_proc_name(unw_cursor_t *cursor, char *buf, + size_t bufLen, unw_word_t *offset) { + _LIBUNWIND_TRACE_API("__unw_get_proc_name(cursor=%p, &buf=%p, bufLen=%lu)", static_cast<void *>(cursor), static_cast<void *>(buf), static_cast<unsigned long>(bufLen)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; @@ -287,58 +197,62 @@ _LIBUNWIND_EXPORT int unw_get_proc_name(unw_cursor_t *cursor, char *buf, else return UNW_EUNSPEC; } - +_LIBUNWIND_WEAK_ALIAS(__unw_get_proc_name, unw_get_proc_name) /// Checks if a register is a floating-point register. -_LIBUNWIND_EXPORT int unw_is_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum) { - _LIBUNWIND_TRACE_API("unw_is_fpreg(cursor=%p, regNum=%d)", +_LIBUNWIND_HIDDEN int __unw_is_fpreg(unw_cursor_t *cursor, + unw_regnum_t regNum) { + _LIBUNWIND_TRACE_API("__unw_is_fpreg(cursor=%p, regNum=%d)", static_cast<void *>(cursor), regNum); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; return co->validFloatReg(regNum); } - +_LIBUNWIND_WEAK_ALIAS(__unw_is_fpreg, unw_is_fpreg) /// Checks if a register is a floating-point register. -_LIBUNWIND_EXPORT const char *unw_regname(unw_cursor_t *cursor, - unw_regnum_t regNum) { - _LIBUNWIND_TRACE_API("unw_regname(cursor=%p, regNum=%d)", +_LIBUNWIND_HIDDEN const char *__unw_regname(unw_cursor_t *cursor, + unw_regnum_t regNum) { + _LIBUNWIND_TRACE_API("__unw_regname(cursor=%p, regNum=%d)", static_cast<void *>(cursor), regNum); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; return co->getRegisterName(regNum); } - +_LIBUNWIND_WEAK_ALIAS(__unw_regname, unw_regname) /// Checks if current frame is signal trampoline. -_LIBUNWIND_EXPORT int unw_is_signal_frame(unw_cursor_t *cursor) { - _LIBUNWIND_TRACE_API("unw_is_signal_frame(cursor=%p)", +_LIBUNWIND_HIDDEN int __unw_is_signal_frame(unw_cursor_t *cursor) { + _LIBUNWIND_TRACE_API("__unw_is_signal_frame(cursor=%p)", static_cast<void *>(cursor)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; return co->isSignalFrame(); } +_LIBUNWIND_WEAK_ALIAS(__unw_is_signal_frame, unw_is_signal_frame) #ifdef __arm__ // Save VFP registers d0-d15 using FSTMIADX instead of FSTMIADD -_LIBUNWIND_EXPORT void unw_save_vfp_as_X(unw_cursor_t *cursor) { - _LIBUNWIND_TRACE_API("unw_fpreg_save_vfp_as_X(cursor=%p)", +_LIBUNWIND_HIDDEN void __unw_save_vfp_as_X(unw_cursor_t *cursor) { + _LIBUNWIND_TRACE_API("__unw_get_fpreg_save_vfp_as_X(cursor=%p)", static_cast<void *>(cursor)); AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor; return co->saveVFPAsX(); } +_LIBUNWIND_WEAK_ALIAS(__unw_save_vfp_as_X, unw_save_vfp_as_X) #endif #if defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND) /// SPI: walks cached DWARF entries -_LIBUNWIND_EXPORT void unw_iterate_dwarf_unwind_cache(void (*func)( +_LIBUNWIND_HIDDEN void __unw_iterate_dwarf_unwind_cache(void (*func)( unw_word_t ip_start, unw_word_t ip_end, unw_word_t fde, unw_word_t mh)) { - _LIBUNWIND_TRACE_API("unw_iterate_dwarf_unwind_cache(func=%p)", + _LIBUNWIND_TRACE_API("__unw_iterate_dwarf_unwind_cache(func=%p)", reinterpret_cast<void *>(func)); DwarfFDECache<LocalAddressSpace>::iterateCacheEntries(func); } - +_LIBUNWIND_WEAK_ALIAS(__unw_iterate_dwarf_unwind_cache, + unw_iterate_dwarf_unwind_cache) /// IPI: for __register_frame() -void _unw_add_dynamic_fde(unw_word_t fde) { +void __unw_add_dynamic_fde(unw_word_t fde) { CFI_Parser<LocalAddressSpace>::FDE_Info fdeInfo; CFI_Parser<LocalAddressSpace>::CIE_Info cieInfo; const char *message = CFI_Parser<LocalAddressSpace>::decodeFDE( @@ -352,12 +266,12 @@ void _unw_add_dynamic_fde(unw_word_t fde) { fdeInfo.pcStart, fdeInfo.pcEnd, fdeInfo.fdeStart); } else { - _LIBUNWIND_DEBUG_LOG("_unw_add_dynamic_fde: bad fde: %s", message); + _LIBUNWIND_DEBUG_LOG("__unw_add_dynamic_fde: bad fde: %s", message); } } /// IPI: for __deregister_frame() -void _unw_remove_dynamic_fde(unw_word_t fde) { +void __unw_remove_dynamic_fde(unw_word_t fde) { // fde is own mh_group DwarfFDECache<LocalAddressSpace>::removeAllIn((LocalAddressSpace::pint_t)fde); } |