diff options
Diffstat (limited to 'lldb/source/Plugins/Process/Utility/libunwind/src/UnwindLevel1-gcc-ext.c')
| -rw-r--r-- | lldb/source/Plugins/Process/Utility/libunwind/src/UnwindLevel1-gcc-ext.c | 282 |
1 files changed, 0 insertions, 282 deletions
diff --git a/lldb/source/Plugins/Process/Utility/libunwind/src/UnwindLevel1-gcc-ext.c b/lldb/source/Plugins/Process/Utility/libunwind/src/UnwindLevel1-gcc-ext.c deleted file mode 100644 index 7103c719ba2..00000000000 --- a/lldb/source/Plugins/Process/Utility/libunwind/src/UnwindLevel1-gcc-ext.c +++ /dev/null @@ -1,282 +0,0 @@ -/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 vi:set tabstop=4 expandtab: -*/ -//===-- UnwindLevel1-gcc-ext.c ----------------------------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -/* - * Implements gcc extensions to the C++ ABI Exception Handling Level 1 as documented at: - * <http://www.codesourcery.com/cxx-abi/abi-eh.html> - * using libunwind - * - */ - -#include <stdint.h> -#include <stdbool.h> -#include <stdlib.h> -#include <stdio.h> - -#include "libunwind.h" -#include "unwind.h" -#include "libunwind_priv.h" -#include "InternalMacros.h" - - -#if __ppc__ || __i386__ || __x86_64__ - -// -// Called by __cxa_rethrow() -// -EXPORT _Unwind_Reason_Code _Unwind_Resume_or_Rethrow(struct _Unwind_Exception* exception_object) -{ - DEBUG_PRINT_API("_Unwind_Resume_or_Rethrow(ex_obj=%p), private_1=%ld\n", exception_object, exception_object->private_1); - // if this is non-forced and a stopping place was found, then this is a re-throw - // call _Unwind_RaiseException() as if this was a new exception - if ( exception_object->private_1 == 0 ) - _Unwind_RaiseException(exception_object); - - // call through to _Unwind_Resume() which distiguishes between forced and regular exceptions - _Unwind_Resume(exception_object); - ABORT("_Unwind_Resume_or_Rethrow() called _Unwind_RaiseException() which unexpectedly returned"); -} - - - -// -// Called by personality handler during phase 2 to get base address for data relative encodings -// -EXPORT uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context* context) -{ - DEBUG_PRINT_API("_Unwind_GetDataRelBase(context=%p)\n", context); - ABORT("_Unwind_GetDataRelBase() not implemented"); -} - -// -// Called by personality handler during phase 2 to get base address for text relative encodings -// -EXPORT uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context* context) -{ - DEBUG_PRINT_API("_Unwind_GetTextRelBase(context=%p)\n", context); - ABORT("_Unwind_GetTextRelBase() not implemented"); -} - - - -// -// Scans unwind information to find the function that contains the -// specified code address "pc". -// -EXPORT void* _Unwind_FindEnclosingFunction(void* pc) -{ - DEBUG_PRINT_API("_Unwind_FindEnclosingFunction(pc=%p)\n", pc); - ABORT("_Unwind_FindEnclosingFunction() not implemented"); -} - - -// -// Walk every frame and call trace function at each one. If trace function -// returns anything other than _URC_NO_REASON, then walk is terminated. -// -EXPORT _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn callback, void* ref) -{ - unw_cursor_t cursor; - unw_context_t uc; - unw_getcontext(&uc); - unw_init_local(&cursor, &uc); - - DEBUG_PRINT_API("_Unwind_Backtrace(callback=%p)\n", callback); - - // walk each frame - while ( true ) { - - // ask libuwind to get next frame (skip over first frame which is _Unwind_Backtrace()) - if ( unw_step(&cursor) <= 0 ) { - DEBUG_PRINT_UNWINDING(" _backtrace: ended because cursor reached bottom of stack, returning %d\n", _URC_END_OF_STACK); - return _URC_END_OF_STACK; - } - - // debugging - if ( DEBUG_PRINT_UNWINDING_TEST ) { - char functionName[512]; - unw_proc_info_t frameInfo; - unw_word_t offset; - unw_get_proc_name(&cursor, functionName, 512, &offset); - unw_get_proc_info(&cursor, &frameInfo); - DEBUG_PRINT_UNWINDING(" _backtrace: start_ip=0x%llX, func=%s, lsda=0x%llX, context=%p\n", - frameInfo.start_ip, functionName, frameInfo.lsda, &cursor); - } - - // call trace function with this frame - _Unwind_Reason_Code result = (*callback)((struct _Unwind_Context*)(&cursor), ref); - if ( result != _URC_NO_REASON ) { - DEBUG_PRINT_UNWINDING(" _backtrace: ended because callback returned %d\n", result); - return result; - } - } -} - - -// -// Find dwarf unwind info for an address 'pc' in some function. -// -EXPORT const void* _Unwind_Find_FDE(const void* pc, struct dwarf_eh_bases* bases) -{ - // This is slow, but works. - // We create an unwind cursor then alter the IP to be pc - unw_cursor_t cursor; - unw_context_t uc; - unw_proc_info_t info; - unw_getcontext(&uc); - unw_init_local(&cursor, &uc); - unw_set_reg(&cursor, UNW_REG_IP, (unw_word_t)(long)pc); - unw_get_proc_info(&cursor, &info); - bases->tbase = info.extra; - bases->dbase = 0; // dbase not used on Mac OS X - bases->func = info.start_ip; - DEBUG_PRINT_API("_Unwind_Find_FDE(pc=%p) => %p\n", pc, (void*)(long)info.unwind_info); - return (void*)(long)info.unwind_info; -} - - - -EXPORT uintptr_t _Unwind_GetCFA(struct _Unwind_Context* context) -{ - unw_cursor_t* cursor = (unw_cursor_t*)context; - unw_word_t result; - unw_get_reg(cursor, UNW_REG_SP, &result); - DEBUG_PRINT_API("_Unwind_GetCFA(context=%p) => 0x%llX\n", context, (uint64_t)result); - return result; -} - - -// -// Called by personality handler during phase 2 to get instruction pointer. -// ipBefore is a boolean that says if IP is already adjusted to be the call -// site address. Normally IP is the return address. -// -EXPORT uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context* context, int* ipBefore) -{ - DEBUG_PRINT_API("_Unwind_GetIPInfo(context=%p)\n", context); - *ipBefore = 0; - return _Unwind_GetIP(context); -} - - -// -// Called by programs with dynamic code generators that want -// to register a dynamically generated FDE. -// This function has existed on Mac OS X since 10.4, but -// never worked before. -// -EXPORT void __register_frame(const void* fde) -{ - DEBUG_PRINT_API("__register_frame(%p)\n", fde); - _unw_add_dynamic_fde((unw_word_t)(uintptr_t)fde); -} - - -// -// Called by programs with dynamic code generators that want -// to unregister a dynamically generated FDE. -// This function has existed on Mac OS X since 10.4, but -// never worked before. -// -EXPORT void __deregister_frame(const void* fde) -{ - DEBUG_PRINT_API("__deregister_frame(%p)\n", fde); - _unw_remove_dynamic_fde((unw_word_t)(uintptr_t)fde); -} - - - -// -// The following register/deregister functions are gcc extensions. -// They have existed on Mac OS X, but have never worked because Mac OS X -// before 10.6 used keymgr to track known FDEs, but these functions -// never got updated to use keymgr. -// For now, we implement these as do-nothing functions to keep any existing -// applications working. We also add the not in 10.6 symbol so that nwe -// application won't be able to use them. -// - -EXPORT void __register_frame_info_bases(const void* fde, void* ob, void* tb, void* db) -{ - DEBUG_PRINT_API("__register_frame_info_bases(%p,%p, %p, %p)\n", fde, ob, tb, db); - // do nothing, this function never worked in Mac OS X -} - -EXPORT void __register_frame_info(const void* fde, void* ob) -{ - DEBUG_PRINT_API("__register_frame_info(%p, %p)\n", fde, ob); - // do nothing, this function never worked in Mac OS X -} - - -EXPORT void __register_frame_info_table_bases(const void* fde, void* ob, void* tb, void* db) -{ - DEBUG_PRINT_API("__register_frame_info_table_bases(%p,%p, %p, %p)\n", fde, ob, tb, db); - // do nothing, this function never worked in Mac OS X -} - -EXPORT void __register_frame_info_table(const void* fde, void* ob) -{ - DEBUG_PRINT_API("__register_frame_info_table(%p, %p)\n", fde, ob); - // do nothing, this function never worked in Mac OS X -} - -EXPORT void __register_frame_table(const void* fde) -{ - DEBUG_PRINT_API("__register_frame_table(%p)\n", fde); - // do nothing, this function never worked in Mac OS X -} - -EXPORT void* __deregister_frame_info(const void* fde) -{ - DEBUG_PRINT_API("__deregister_frame_info(%p)\n", fde); - // do nothing, this function never worked in Mac OS X - return NULL; -} - -EXPORT void* __deregister_frame_info_bases(const void* fde) -{ - DEBUG_PRINT_API("__deregister_frame_info_bases(%p)\n", fde); - // do nothing, this function never worked in Mac OS X - return NULL; -} - - - - -// -// symbols in libSystem.dylib in 10.6 and later, but are in libgcc_s.dylib in earlier versions -// -NOT_HERE_BEFORE_10_6(_Unwind_Backtrace) -NOT_HERE_BEFORE_10_6(_Unwind_FindEnclosingFunction) -NOT_HERE_BEFORE_10_6(_Unwind_GetCFA) -NOT_HERE_BEFORE_10_6(_Unwind_GetDataRelBase) -NOT_HERE_BEFORE_10_6(_Unwind_GetTextRelBase) -NOT_HERE_BEFORE_10_6(_Unwind_Resume_or_Rethrow) -NOT_HERE_BEFORE_10_6(_Unwind_GetIPInfo) - -NOT_HERE_BEFORE_10_6(__register_frame) -NOT_HERE_BEFORE_10_6(__deregister_frame) - - -// -// symbols in libSystem.dylib for compatibility, but we don't want any new code using them -// -NEVER_HERE(__register_frame_info_bases) -NEVER_HERE(__register_frame_info) -NEVER_HERE(__register_frame_info_table_bases) -NEVER_HERE(__register_frame_info_table) -NEVER_HERE(__register_frame_table) -NEVER_HERE(__deregister_frame_info) -NEVER_HERE(__deregister_frame_info_bases) - - -#endif // __ppc__ || __i386__ || __x86_64__ - |
