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[libunwind] Export the unw_* symbols as weak symbols 

libunwind defines the _Unwind_* ABI used by libc++abi. This ABI is a
stable quasi-standard common between multiple implementations such as
LLVM and GNU. The _U* symbol name space is also safely within the symbol
name space that standard C & C++ reserve for the implementation.

Futhermore, libunwind also defines several unw_* symbols, and references
these from the _Unwind_* entry points so the standard/reserved part of
the ABI is dependent on the unw_* part of the ABI. This is not OK for a
C or C++ implementation. The unw_* symbols are reserved for C and extern
"C" used by application code.

This change renames each unw_* function to __unw* and adds a weak alias
unw_* to keep the public <libunwind.h> ABI unchanged for backwards
compatibility. Every reference to unw_* in the implementation has been
changed to use __unw* so that if other unw_* definitions are in force
because nothing uses <libunwind.h> in a particular program, no _Unwind*
code path depends on any unw_* symbol. Furthemore, __unw_* symbols are
hidden, which saves PLT overhead in the shared library case.

In the future, we should cconsider untangling the unw_* API/ABI from the
_Unwind_* API/ABI. The internal API backing the _Unwind_* ABI
implementation should not rely on any nonstandard symbols not in the
implementation-reserved name space. This would then allow separating the
_Unwind_* API/ABI from unw_* entirely, but that's a more substantial
change that's going to require more significant refactoring.

Differential Revision: https://reviews.llvm.org/D59921

llvm-svn: 357640
This commit is contained in:
Petr Hosek 2019-04-03 21:50:03 +00:00
parent 306809f292
commit e369a989fc
12 changed files with 361 additions and 276 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
libunwind/src/Registers.hpp
View File

@ -2154,7 +2154,7 @@ inline Registers_arm::Registers_arm(const void *registers)
_saved_vfp_d16_d31(false) {
static_assert((check_fit<Registers_arm, unw_context_t>::does_fit),
"arm registers do not fit into unw_context_t");
// See unw_getcontext() note about data.
// See __unw_getcontext() note about data.
memcpy(&_registers, registers, sizeof(_registers));
memset(&_vfp_d0_d15_pad, 0, sizeof(_vfp_d0_d15_pad));
memset(&_vfp_d16_d31, 0, sizeof(_vfp_d16_d31));
@ -2433,7 +2433,7 @@ inline const char *Registers_arm::getRegisterName(int regNum) {
inline bool Registers_arm::validFloatRegister(int regNum) const {
// NOTE: Consider the intel MMX registers floating points so the
// unw_get_fpreg can be used to transmit the 64-bit data back.
// __unw_get_fpreg can be used to transmit the 64-bit data back.
return ((regNum >= UNW_ARM_D0) && (regNum <= UNW_ARM_D31))
#if defined(__ARM_WMMX)
|| ((regNum >= UNW_ARM_WR0) && (regNum <= UNW_ARM_WR15))

96
libunwind/src/Unwind-EHABI.cpp
View File

@ -179,7 +179,7 @@ static _Unwind_Reason_Code unwindOneFrame(_Unwind_State state,
if (result != _URC_CONTINUE_UNWIND)
return result;
if (unw_step(reinterpret_cast<unw_cursor_t*>(context)) != UNW_STEP_SUCCESS)
if (__unw_step(reinterpret_cast<unw_cursor_t *>(context)) != UNW_STEP_SUCCESS)
return _URC_FAILURE;
return _URC_CONTINUE_UNWIND;
}
@ -440,17 +440,18 @@ unwind_phase1(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
// In this implementation, the phases don't share the VRS backing store.
// Instead, they are passed the original |uc| and they create a new VRS
// from scratch thus achieving the same effect.
unw_init_local(cursor, uc);
__unw_init_local(cursor, uc);
// Walk each frame looking for a place to stop.
for (bool handlerNotFound = true; handlerNotFound;) {
// See if frame has code to run (has personality routine).
unw_proc_info_t frameInfo;
if (unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase1(ex_ojb=%p): unw_get_proc_info "
"failed => _URC_FATAL_PHASE1_ERROR",
static_cast<void *>(exception_object));
if (__unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): __unw_get_proc_info "
"failed => _URC_FATAL_PHASE1_ERROR",
static_cast<void *>(exception_object));
return _URC_FATAL_PHASE1_ERROR;
}
@ -459,12 +460,12 @@ unwind_phase1(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
char functionBuf[512];
const char *functionName = functionBuf;
unw_word_t offset;
if ((unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
if ((__unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
(frameInfo.start_ip + offset > frameInfo.end_ip))
functionName = ".anonymous.";
unw_word_t pc;
unw_get_reg(cursor, UNW_REG_IP, &pc);
__unw_get_reg(cursor, UNW_REG_IP, &pc);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): pc=0x%" PRIxPTR ", start_ip=0x%" PRIxPTR ", func=%s, "
"lsda=0x%" PRIxPTR ", personality=0x%" PRIxPTR,
@ -534,7 +535,7 @@ static _Unwind_Reason_Code unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor
_Unwind_Exception *exception_object,
bool resume) {
// See comment at the start of unwind_phase1 regarding VRS integrity.
unw_init_local(cursor, uc);
__unw_init_local(cursor, uc);
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p)",
static_cast<void *>(exception_object));
@ -556,19 +557,20 @@ static _Unwind_Reason_Code unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor
// for. After this, continue unwinding as if normal.
//
// See #7.4.6 for details.
unw_set_reg(cursor, UNW_REG_IP,
exception_object->unwinder_cache.reserved2);
__unw_set_reg(cursor, UNW_REG_IP,
exception_object->unwinder_cache.reserved2);
resume = false;
}
// Get info about this frame.
unw_word_t sp;
unw_proc_info_t frameInfo;
unw_get_reg(cursor, UNW_REG_SP, &sp);
if (unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): unw_get_proc_info "
"failed => _URC_FATAL_PHASE2_ERROR",
static_cast<void *>(exception_object));
__unw_get_reg(cursor, UNW_REG_SP, &sp);
if (__unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase2(ex_ojb=%p): __unw_get_proc_info "
"failed => _URC_FATAL_PHASE2_ERROR",
static_cast<void *>(exception_object));
return _URC_FATAL_PHASE2_ERROR;
}
@ -577,8 +579,8 @@ static _Unwind_Reason_Code unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor
char functionBuf[512];
const char *functionName = functionBuf;
unw_word_t offset;
if ((unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
if ((__unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
(frameInfo.start_ip + offset > frameInfo.end_ip))
functionName = ".anonymous.";
_LIBUNWIND_TRACE_UNWINDING(
@ -622,8 +624,8 @@ static _Unwind_Reason_Code unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor
// We may get control back if landing pad calls _Unwind_Resume().
if (_LIBUNWIND_TRACING_UNWINDING) {
unw_word_t pc;
unw_get_reg(cursor, UNW_REG_IP, &pc);
unw_get_reg(cursor, UNW_REG_SP, &sp);
__unw_get_reg(cursor, UNW_REG_IP, &pc);
__unw_get_reg(cursor, UNW_REG_SP, &sp);
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): re-entering "
"user code with ip=0x%" PRIxPTR ", sp=0x%" PRIxPTR,
static_cast<void *>(exception_object),
@ -634,11 +636,11 @@ static _Unwind_Reason_Code unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor
// EHABI #7.4.1 says we need to preserve pc for when _Unwind_Resume
// is called back, to find this same frame.
unw_word_t pc;
unw_get_reg(cursor, UNW_REG_IP, &pc);
__unw_get_reg(cursor, UNW_REG_IP, &pc);
exception_object->unwinder_cache.reserved2 = (uint32_t)pc;
}
unw_resume(cursor);
// unw_resume() only returns if there was an error.
__unw_resume(cursor);
// __unw_resume() only returns if there was an error.
return _URC_FATAL_PHASE2_ERROR;
// # EHABI #7.4.3
@ -667,7 +669,7 @@ _Unwind_RaiseException(_Unwind_Exception *exception_object) {
static_cast<void *>(exception_object));
unw_context_t uc;
unw_cursor_t cursor;
unw_getcontext(&uc);
__unw_getcontext(&uc);
// This field for is for compatibility with GCC to say this isn't a forced
// unwind. EHABI #7.2
@ -705,7 +707,7 @@ _Unwind_Resume(_Unwind_Exception *exception_object) {
static_cast<void *>(exception_object));
unw_context_t uc;
unw_cursor_t cursor;
unw_getcontext(&uc);
__unw_getcontext(&uc);
// _Unwind_RaiseException on EHABI will always set the reserved1 field to 0,
// which is in the same position as private_1 below.
@ -722,7 +724,7 @@ _Unwind_GetLanguageSpecificData(struct _Unwind_Context *context) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_proc_info_t frameInfo;
uintptr_t result = 0;
if (unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
if (__unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
result = (uintptr_t)frameInfo.lsda;
_LIBUNWIND_TRACE_API(
"_Unwind_GetLanguageSpecificData(context=%p) => 0x%llx",
@ -762,8 +764,8 @@ _Unwind_VRS_Set(_Unwind_Context *context, _Unwind_VRS_RegClass regclass,
case _UVRSC_CORE:
if (representation != _UVRSD_UINT32 || regno > 15)
return _UVRSR_FAILED;
return unw_set_reg(cursor, (unw_regnum_t)(UNW_ARM_R0 + regno),
*(unw_word_t *)valuep) == UNW_ESUCCESS
return __unw_set_reg(cursor, (unw_regnum_t)(UNW_ARM_R0 + regno),
*(unw_word_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
case _UVRSC_VFP:
@ -773,28 +775,28 @@ _Unwind_VRS_Set(_Unwind_Context *context, _Unwind_VRS_RegClass regclass,
// Can only touch d0-15 with FSTMFDX.
if (regno > 15)
return _UVRSR_FAILED;
unw_save_vfp_as_X(cursor);
__unw_save_vfp_as_X(cursor);
} else {
if (regno > 31)
return _UVRSR_FAILED;
}
return unw_set_fpreg(cursor, (unw_regnum_t)(UNW_ARM_D0 + regno),
*(unw_fpreg_t *)valuep) == UNW_ESUCCESS
return __unw_set_fpreg(cursor, (unw_regnum_t)(UNW_ARM_D0 + regno),
*(unw_fpreg_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
#if defined(__ARM_WMMX)
case _UVRSC_WMMXC:
if (representation != _UVRSD_UINT32 || regno > 3)
return _UVRSR_FAILED;
return unw_set_reg(cursor, (unw_regnum_t)(UNW_ARM_WC0 + regno),
*(unw_word_t *)valuep) == UNW_ESUCCESS
return __unw_set_reg(cursor, (unw_regnum_t)(UNW_ARM_WC0 + regno),
*(unw_word_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
case _UVRSC_WMMXD:
if (representation != _UVRSD_DOUBLE || regno > 31)
return _UVRSR_FAILED;
return unw_set_fpreg(cursor, (unw_regnum_t)(UNW_ARM_WR0 + regno),
*(unw_fpreg_t *)valuep) == UNW_ESUCCESS
return __unw_set_fpreg(cursor, (unw_regnum_t)(UNW_ARM_WR0 + regno),
*(unw_fpreg_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
#else
@ -816,8 +818,8 @@ _Unwind_VRS_Get_Internal(_Unwind_Context *context,
case _UVRSC_CORE:
if (representation != _UVRSD_UINT32 || regno > 15)
return _UVRSR_FAILED;
return unw_get_reg(cursor, (unw_regnum_t)(UNW_ARM_R0 + regno),
(unw_word_t *)valuep) == UNW_ESUCCESS
return __unw_get_reg(cursor, (unw_regnum_t)(UNW_ARM_R0 + regno),
(unw_word_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
case _UVRSC_VFP:
@ -827,28 +829,28 @@ _Unwind_VRS_Get_Internal(_Unwind_Context *context,
// Can only touch d0-15 with FSTMFDX.
if (regno > 15)
return _UVRSR_FAILED;
unw_save_vfp_as_X(cursor);
__unw_save_vfp_as_X(cursor);
} else {
if (regno > 31)
return _UVRSR_FAILED;
}
return unw_get_fpreg(cursor, (unw_regnum_t)(UNW_ARM_D0 + regno),
(unw_fpreg_t *)valuep) == UNW_ESUCCESS
return __unw_get_fpreg(cursor, (unw_regnum_t)(UNW_ARM_D0 + regno),
(unw_fpreg_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
#if defined(__ARM_WMMX)
case _UVRSC_WMMXC:
if (representation != _UVRSD_UINT32 || regno > 3)
return _UVRSR_FAILED;
return unw_get_reg(cursor, (unw_regnum_t)(UNW_ARM_WC0 + regno),
(unw_word_t *)valuep) == UNW_ESUCCESS
return __unw_get_reg(cursor, (unw_regnum_t)(UNW_ARM_WC0 + regno),
(unw_word_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
case _UVRSC_WMMXD:
if (representation != _UVRSD_DOUBLE || regno > 31)
return _UVRSR_FAILED;
return unw_get_fpreg(cursor, (unw_regnum_t)(UNW_ARM_WR0 + regno),
(unw_fpreg_t *)valuep) == UNW_ESUCCESS
return __unw_get_fpreg(cursor, (unw_regnum_t)(UNW_ARM_WR0 + regno),
(unw_fpreg_t *)valuep) == UNW_ESUCCESS
? _UVRSR_OK
: _UVRSR_FAILED;
#else
@ -957,7 +959,7 @@ _Unwind_GetRegionStart(struct _Unwind_Context *context) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_proc_info_t frameInfo;
uintptr_t result = 0;
if (unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
if (__unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
result = (uintptr_t)frameInfo.start_ip;
_LIBUNWIND_TRACE_API("_Unwind_GetRegionStart(context=%p) => 0x%llX",
static_cast<void *>(context), (long long)result);
@ -980,7 +982,7 @@ extern "C" _LIBUNWIND_EXPORT _Unwind_Reason_Code
__gnu_unwind_frame(_Unwind_Exception *exception_object,
struct _Unwind_Context *context) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
if (unw_step(cursor) != UNW_STEP_SUCCESS)
if (__unw_step(cursor) != UNW_STEP_SUCCESS)
return _URC_FAILURE;
return _URC_OK;
}

65
libunwind/src/Unwind-seh.cpp
View File

@ -58,9 +58,10 @@ static void seh_exc_cleanup(_Unwind_Reason_Code urc, _Unwind_Exception *exc) {
free(exc);
}
static int _unw_init_seh(unw_cursor_t *cursor, CONTEXT *ctx);
static DISPATCHER_CONTEXT *_unw_seh_get_disp_ctx(unw_cursor_t *cursor);
static void _unw_seh_set_disp_ctx(unw_cursor_t *cursor, DISPATCHER_CONTEXT *disp);
static int __unw_init_seh(unw_cursor_t *cursor, CONTEXT *ctx);
static DISPATCHER_CONTEXT *__unw_seh_get_disp_ctx(unw_cursor_t *cursor);
static void __unw_seh_set_disp_ctx(unw_cursor_t *cursor,
DISPATCHER_CONTEXT *disp);
/// Common implementation of SEH-style handler functions used by Itanium-
/// style frames. Depending on how and why it was called, it may do one of:
@ -113,9 +114,9 @@ _GCC_specific_handler(PEXCEPTION_RECORD ms_exc, PVOID frame, PCONTEXT ms_ctx,
memset(exc->private_, 0, sizeof(exc->private_));
}
if (!ctx) {
_unw_init_seh(&cursor, disp->ContextRecord);
_unw_seh_set_disp_ctx(&cursor, disp);
unw_set_reg(&cursor, UNW_REG_IP, disp->ControlPc-1);
__unw_init_seh(&cursor, disp->ContextRecord);
__unw_seh_set_disp_ctx(&cursor, disp);
__unw_set_reg(&cursor, UNW_REG_IP, disp->ControlPc - 1);
ctx = (struct _Unwind_Context *)&cursor;
if (!IS_UNWINDING(ms_exc->ExceptionFlags)) {
@ -172,18 +173,18 @@ _GCC_specific_handler(PEXCEPTION_RECORD ms_exc, PVOID frame, PCONTEXT ms_ctx,
_LIBUNWIND_ABORT("Personality installed context during phase 1!");
#ifdef __x86_64__
exc->private_[2] = disp->TargetIp;
unw_get_reg(&cursor, UNW_X86_64_RAX, &retval);
unw_get_reg(&cursor, UNW_X86_64_RDX, &exc->private_[3]);
__unw_get_reg(&cursor, UNW_X86_64_RAX, &retval);
__unw_get_reg(&cursor, UNW_X86_64_RDX, &exc->private_[3]);
#elif defined(__arm__)
exc->private_[2] = disp->TargetPc;
unw_get_reg(&cursor, UNW_ARM_R0, &retval);
unw_get_reg(&cursor, UNW_ARM_R1, &exc->private_[3]);
__unw_get_reg(&cursor, UNW_ARM_R0, &retval);
__unw_get_reg(&cursor, UNW_ARM_R1, &exc->private_[3]);
#elif defined(__aarch64__)
exc->private_[2] = disp->TargetPc;
unw_get_reg(&cursor, UNW_ARM64_X0, &retval);
unw_get_reg(&cursor, UNW_ARM64_X1, &exc->private_[3]);
__unw_get_reg(&cursor, UNW_ARM64_X0, &retval);
__unw_get_reg(&cursor, UNW_ARM64_X1, &exc->private_[3]);
#endif
unw_get_reg(&cursor, UNW_REG_IP, &target);
__unw_get_reg(&cursor, UNW_REG_IP, &target);
ms_exc->ExceptionCode = STATUS_GCC_UNWIND;
#ifdef __x86_64__
ms_exc->ExceptionInformation[2] = disp->TargetIp;
@ -203,7 +204,7 @@ _GCC_specific_handler(PEXCEPTION_RECORD ms_exc, PVOID frame, PCONTEXT ms_ctx,
}
}
/// Personality function returned by \c unw_get_proc_info() in SEH contexts.
/// Personality function returned by \c __unw_get_proc_info() in SEH contexts.
/// This is a wrapper that calls the real SEH handler function, which in
/// turn (at least, for Itanium-style frames) calls the real Itanium
/// personality function (see \c _GCC_specific_handler()).
@ -221,7 +222,8 @@ __libunwind_seh_personality(int version, _Unwind_Action state,
ms_exc.ExceptionInformation[0] = (ULONG_PTR)exc;
ms_exc.ExceptionInformation[1] = (ULONG_PTR)context;
ms_exc.ExceptionInformation[2] = state;
DISPATCHER_CONTEXT *disp_ctx = _unw_seh_get_disp_ctx((unw_cursor_t *)context);
DISPATCHER_CONTEXT *disp_ctx =
__unw_seh_get_disp_ctx((unw_cursor_t *)context);
EXCEPTION_DISPOSITION ms_act = disp_ctx->LanguageHandler(&ms_exc,
(PVOID)disp_ctx->EstablisherFrame,
disp_ctx->ContextRecord,
@ -240,15 +242,15 @@ unwind_phase2_forced(unw_context_t *uc,
_Unwind_Exception *exception_object,
_Unwind_Stop_Fn stop, void *stop_parameter) {
unw_cursor_t cursor2;
unw_init_local(&cursor2, uc);
__unw_init_local(&cursor2, uc);
// Walk each frame until we reach where search phase said to stop
while (unw_step(&cursor2) > 0) {
while (__unw_step(&cursor2) > 0) {
// Update info about this frame.
unw_proc_info_t frameInfo;
if (unw_get_proc_info(&cursor2, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2_forced(ex_ojb=%p): unw_step "
if (__unw_get_proc_info(&cursor2, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2_forced(ex_ojb=%p): __unw_step "
"failed => _URC_END_OF_STACK",
(void *)exception_object);
return _URC_FATAL_PHASE2_ERROR;
@ -259,8 +261,8 @@ unwind_phase2_forced(unw_context_t *uc,
char functionBuf[512];
const char *functionName = functionBuf;
unw_word_t offset;
if ((unw_get_proc_name(&cursor2, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
if ((__unw_get_proc_name(&cursor2, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
(frameInfo.start_ip + offset > frameInfo.end_ip))
functionName = ".anonymous.";
_LIBUNWIND_TRACE_UNWINDING(
@ -310,7 +312,7 @@ unwind_phase2_forced(unw_context_t *uc,
"_URC_INSTALL_CONTEXT",
(void *)exception_object);
// We may get control back if landing pad calls _Unwind_Resume().
unw_resume(&cursor2);
__unw_resume(&cursor2);
break;
default:
// Personality routine returned an unknown result code.
@ -375,7 +377,7 @@ _Unwind_Resume(_Unwind_Exception *exception_object) {
if (exception_object->private_[0] != 0) {
unw_context_t uc;
unw_getcontext(&uc);
__unw_getcontext(&uc);
unwind_phase2_forced(&uc, exception_object,
(_Unwind_Stop_Fn) exception_object->private_[0],
(void *)exception_object->private_[4]);
@ -413,7 +415,7 @@ _Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
_LIBUNWIND_TRACE_API("_Unwind_ForcedUnwind(ex_obj=%p, stop=%p)",
(void *)exception_object, (void *)(uintptr_t)stop);
unw_context_t uc;
unw_getcontext(&uc);
__unw_getcontext(&uc);
// Mark that this is a forced unwind, so _Unwind_Resume() can do
// the right thing.
@ -427,7 +429,8 @@ _Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
/// Called by personality handler during phase 2 to get LSDA for current frame.
_LIBUNWIND_EXPORT uintptr_t
_Unwind_GetLanguageSpecificData(struct _Unwind_Context *context) {
uintptr_t result = (uintptr_t)_unw_seh_get_disp_ctx((unw_cursor_t *)context)->HandlerData;
uintptr_t result =
(uintptr_t)__unw_seh_get_disp_ctx((unw_cursor_t *)context)->HandlerData;
_LIBUNWIND_TRACE_API(
"_Unwind_GetLanguageSpecificData(context=%p) => 0x%" PRIxPTR,
(void *)context, result);
@ -438,15 +441,14 @@ _Unwind_GetLanguageSpecificData(struct _Unwind_Context *context) {
/// function.
_LIBUNWIND_EXPORT uintptr_t
_Unwind_GetRegionStart(struct _Unwind_Context *context) {
DISPATCHER_CONTEXT *disp = _unw_seh_get_disp_ctx((unw_cursor_t *)context);
DISPATCHER_CONTEXT *disp = __unw_seh_get_disp_ctx((unw_cursor_t *)context);
uintptr_t result = (uintptr_t)disp->FunctionEntry->BeginAddress + disp->ImageBase;
_LIBUNWIND_TRACE_API("_Unwind_GetRegionStart(context=%p) => 0x%" PRIxPTR,
(void *)context, result);
return result;
}
static int
_unw_init_seh(unw_cursor_t *cursor, CONTEXT *context) {
static int __unw_init_seh(unw_cursor_t *cursor, CONTEXT *context) {
#ifdef _LIBUNWIND_TARGET_X86_64
new (reinterpret_cast<UnwindCursor<LocalAddressSpace, Registers_x86_64> *>(cursor))
UnwindCursor<LocalAddressSpace, Registers_x86_64>(
@ -473,8 +475,7 @@ _unw_init_seh(unw_cursor_t *cursor, CONTEXT *context) {
#endif
}
static DISPATCHER_CONTEXT *
_unw_seh_get_disp_ctx(unw_cursor_t *cursor) {
static DISPATCHER_CONTEXT *__unw_seh_get_disp_ctx(unw_cursor_t *cursor) {
#ifdef _LIBUNWIND_TARGET_X86_64
return reinterpret_cast<UnwindCursor<LocalAddressSpace, Registers_x86_64> *>(cursor)->getDispatcherContext();
#elif defined(_LIBUNWIND_TARGET_ARM)
@ -486,8 +487,8 @@ _unw_seh_get_disp_ctx(unw_cursor_t *cursor) {
#endif
}
static void
_unw_seh_set_disp_ctx(unw_cursor_t *cursor, DISPATCHER_CONTEXT *disp) {
static void __unw_seh_set_disp_ctx(unw_cursor_t *cursor,
DISPATCHER_CONTEXT *disp) {
#ifdef _LIBUNWIND_TARGET_X86_64
reinterpret_cast<UnwindCursor<LocalAddressSpace, Registers_x86_64> *>(cursor)->setDispatcherContext(disp);
#elif defined(_LIBUNWIND_TARGET_ARM)

16
libunwind/src/Unwind-sjlj.c
View File

@ -177,9 +177,10 @@ unwind_phase2(struct _Unwind_Exception *exception_object) {
// check for no more frames
if (c == NULL) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase2(ex_ojb=%p): __unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
return _URC_END_OF_STACK;
}
@ -215,7 +216,7 @@ unwind_phase2(struct _Unwind_Exception *exception_object) {
// we may get control back if landing pad calls _Unwind_Resume()
__Unwind_SjLj_SetTopOfFunctionStack(c);
__builtin_longjmp(c->jbuf, 1);
// unw_resume() only returns if there was an error
// __unw_resume() only returns if there was an error
return _URC_FATAL_PHASE2_ERROR;
default:
// something went wrong
@ -242,9 +243,10 @@ unwind_phase2_forced(struct _Unwind_Exception *exception_object,
// get next frame (skip over first which is _Unwind_RaiseException)
if (c == NULL) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase2(ex_ojb=%p): __unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
return _URC_END_OF_STACK;
}

34
libunwind/src/UnwindLevel1-gcc-ext.c
View File

@ -93,10 +93,10 @@ _LIBUNWIND_EXPORT void *_Unwind_FindEnclosingFunction(void *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)(intptr_t) pc);
if (unw_get_proc_info(&cursor, &info) == UNW_ESUCCESS)
__unw_getcontext(&uc);
__unw_init_local(&cursor, &uc);
__unw_set_reg(&cursor, UNW_REG_IP, (unw_word_t)(intptr_t)pc);
if (__unw_get_proc_info(&cursor, &info) == UNW_ESUCCESS)
return (void *)(intptr_t) info.start_ip;
else
return NULL;
@ -108,8 +108,8 @@ _LIBUNWIND_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);
__unw_getcontext(&uc);
__unw_init_local(&cursor, &uc);
_LIBUNWIND_TRACE_API("_Unwind_Backtrace(callback=%p)",
(void *)(uintptr_t)callback);
@ -128,7 +128,7 @@ _Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref) {
#if !defined(_LIBUNWIND_ARM_EHABI)
// ask libunwind to get next frame (skip over first frame which is
// _Unwind_Backtrace())
if (unw_step(&cursor) <= 0) {
if (__unw_step(&cursor) <= 0) {
_LIBUNWIND_TRACE_UNWINDING(" _backtrace: ended because cursor reached "
"bottom of stack, returning %d",
_URC_END_OF_STACK);
@ -137,7 +137,7 @@ _Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref) {
#else
// Get the information for this frame.
unw_proc_info_t frameInfo;
if (unw_get_proc_info(&cursor, &frameInfo) != UNW_ESUCCESS) {
if (__unw_get_proc_info(&cursor, &frameInfo) != UNW_ESUCCESS) {
return _URC_END_OF_STACK;
}
@ -164,8 +164,8 @@ _Unwind_Backtrace(_Unwind_Trace_Fn callback, void *ref) {
char functionName[512];
unw_proc_info_t frame;
unw_word_t offset;
unw_get_proc_name(&cursor, functionName, 512, &offset);
unw_get_proc_info(&cursor, &frame);
__unw_get_proc_name(&cursor, functionName, 512, &offset);
__unw_get_proc_info(&cursor, &frame);
_LIBUNWIND_TRACE_UNWINDING(
" _backtrace: start_ip=0x%" PRIxPTR ", func=%s, lsda=0x%" PRIxPTR ", context=%p",
frame.start_ip, functionName, frame.lsda,
@ -191,10 +191,10 @@ _LIBUNWIND_EXPORT const void *_Unwind_Find_FDE(const void *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)(intptr_t) pc);
unw_get_proc_info(&cursor, &info);
__unw_getcontext(&uc);
__unw_init_local(&cursor, &uc);
__unw_set_reg(&cursor, UNW_REG_IP, (unw_word_t)(intptr_t)pc);
__unw_get_proc_info(&cursor, &info);
bases->tbase = (uintptr_t)info.extra;
bases->dbase = 0; // dbase not used on Mac OS X
bases->func = (uintptr_t)info.start_ip;
@ -208,7 +208,7 @@ _LIBUNWIND_EXPORT const void *_Unwind_Find_FDE(const void *pc,
_LIBUNWIND_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);
__unw_get_reg(cursor, UNW_REG_SP, &result);
_LIBUNWIND_TRACE_API("_Unwind_GetCFA(context=%p) => 0x%" PRIxPTR,
(void *)context, result);
return (uintptr_t)result;
@ -233,7 +233,7 @@ _LIBUNWIND_EXPORT uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context *context,
/// was broken until 10.6.
_LIBUNWIND_EXPORT void __register_frame(const void *fde) {
_LIBUNWIND_TRACE_API("__register_frame(%p)", fde);
_unw_add_dynamic_fde((unw_word_t)(uintptr_t) fde);
__unw_add_dynamic_fde((unw_word_t)(uintptr_t)fde);
}
@ -243,7 +243,7 @@ _LIBUNWIND_EXPORT void __register_frame(const void *fde) {
/// was broken until 10.6.
_LIBUNWIND_EXPORT void __deregister_frame(const void *fde) {
_LIBUNWIND_TRACE_API("__deregister_frame(%p)", fde);
_unw_remove_dynamic_fde((unw_word_t)(uintptr_t) fde);
__unw_remove_dynamic_fde((unw_word_t)(uintptr_t)fde);
}

113
libunwind/src/UnwindLevel1.c
View File

@ -25,9 +25,10 @@
#include <stdio.h>
#include <string.h>
#include "libunwind.h"
#include "unwind.h"
#include "config.h"
#include "libunwind.h"
#include "libunwind_ext.h"
#include "unwind.h"
#if !defined(_LIBUNWIND_ARM_EHABI) && !defined(__USING_SJLJ_EXCEPTIONS__)
@ -35,33 +36,36 @@
static _Unwind_Reason_Code
unwind_phase1(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *exception_object) {
unw_init_local(cursor, uc);
__unw_init_local(cursor, uc);
// Walk each frame looking for a place to stop.
bool handlerNotFound = true;
while (handlerNotFound) {
// Ask libunwind to get next frame (skip over first which is
// _Unwind_RaiseException).
int stepResult = unw_step(cursor);
int stepResult = __unw_step(cursor);
if (stepResult == 0) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase1(ex_ojb=%p): unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): __unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
return _URC_END_OF_STACK;
} else if (stepResult < 0) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase1(ex_ojb=%p): unw_step failed => "
"_URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): __unw_step failed => "
"_URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
return _URC_FATAL_PHASE1_ERROR;
}
// See if frame has code to run (has personality routine).
unw_proc_info_t frameInfo;
unw_word_t sp;
if (unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase1(ex_ojb=%p): unw_get_proc_info "
"failed => _URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
if (__unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): __unw_get_proc_info "
"failed => _URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
return _URC_FATAL_PHASE1_ERROR;
}
@ -70,12 +74,12 @@ unwind_phase1(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
char functionBuf[512];
const char *functionName = functionBuf;
unw_word_t offset;
if ((unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
if ((__unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
(frameInfo.start_ip + offset > frameInfo.end_ip))
functionName = ".anonymous.";
unw_word_t pc;
unw_get_reg(cursor, UNW_REG_IP, &pc);
__unw_get_reg(cursor, UNW_REG_IP, &pc);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): pc=0x%" PRIxPTR ", start_ip=0x%" PRIxPTR
", func=%s, lsda=0x%" PRIxPTR ", personality=0x%" PRIxPTR "",
@ -99,7 +103,7 @@ unwind_phase1(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
// found a catch clause or locals that need destructing in this frame
// stop search and remember stack pointer at the frame
handlerNotFound = false;
unw_get_reg(cursor, UNW_REG_SP, &sp);
__unw_get_reg(cursor, UNW_REG_SP, &sp);
exception_object->private_2 = (uintptr_t)sp;
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase1(ex_ojb=%p): _URC_HANDLER_FOUND",
@ -128,7 +132,7 @@ unwind_phase1(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
static _Unwind_Reason_Code
unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *exception_object) {
unw_init_local(cursor, uc);
__unw_init_local(cursor, uc);
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p)",
(void *)exception_object);
@ -138,27 +142,30 @@ unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
// Ask libunwind to get next frame (skip over first which is
// _Unwind_RaiseException).
int stepResult = unw_step(cursor);
int stepResult = __unw_step(cursor);
if (stepResult == 0) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase2(ex_ojb=%p): __unw_step() reached "
"bottom => _URC_END_OF_STACK",
(void *)exception_object);
return _URC_END_OF_STACK;
} else if (stepResult < 0) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): unw_step failed => "
"_URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase2(ex_ojb=%p): __unw_step failed => "
"_URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
return _URC_FATAL_PHASE2_ERROR;
}
// Get info about this frame.
unw_word_t sp;
unw_proc_info_t frameInfo;
unw_get_reg(cursor, UNW_REG_SP, &sp);
if (unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): unw_get_proc_info "
"failed => _URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
__unw_get_reg(cursor, UNW_REG_SP, &sp);
if (__unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING(
"unwind_phase2(ex_ojb=%p): __unw_get_proc_info "
"failed => _URC_FATAL_PHASE1_ERROR",
(void *)exception_object);
return _URC_FATAL_PHASE2_ERROR;
}
@ -167,8 +174,8 @@ unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
char functionBuf[512];
const char *functionName = functionBuf;
unw_word_t offset;
if ((unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
if ((__unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
(frameInfo.start_ip + offset > frameInfo.end_ip))
functionName = ".anonymous.";
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): start_ip=0x%" PRIxPTR
@ -211,15 +218,15 @@ unwind_phase2(unw_context_t *uc, unw_cursor_t *cursor, _Unwind_Exception *except
// We may get control back if landing pad calls _Unwind_Resume().
if (_LIBUNWIND_TRACING_UNWINDING) {
unw_word_t pc;
unw_get_reg(cursor, UNW_REG_IP, &pc);
unw_get_reg(cursor, UNW_REG_SP, &sp);
__unw_get_reg(cursor, UNW_REG_IP, &pc);
__unw_get_reg(cursor, UNW_REG_SP, &sp);
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2(ex_ojb=%p): re-entering "
"user code with ip=0x%" PRIxPTR
", sp=0x%" PRIxPTR,
(void *)exception_object, pc, sp);
}
unw_resume(cursor);
// unw_resume() only returns if there was an error.
__unw_resume(cursor);
// __unw_resume() only returns if there was an error.
return _URC_FATAL_PHASE2_ERROR;
default:
// Personality routine returned an unknown result code.
@ -239,15 +246,15 @@ static _Unwind_Reason_Code
unwind_phase2_forced(unw_context_t *uc, unw_cursor_t *cursor,
_Unwind_Exception *exception_object,
_Unwind_Stop_Fn stop, void *stop_parameter) {
unw_init_local(cursor, uc);
__unw_init_local(cursor, uc);
// Walk each frame until we reach where search phase said to stop
while (unw_step(cursor) > 0) {
while (__unw_step(cursor) > 0) {
// Update info about this frame.
unw_proc_info_t frameInfo;
if (unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2_forced(ex_ojb=%p): unw_step "
if (__unw_get_proc_info(cursor, &frameInfo) != UNW_ESUCCESS) {
_LIBUNWIND_TRACE_UNWINDING("unwind_phase2_forced(ex_ojb=%p): __unw_step "
"failed => _URC_END_OF_STACK",
(void *)exception_object);
return _URC_FATAL_PHASE2_ERROR;
@ -258,8 +265,8 @@ unwind_phase2_forced(unw_context_t *uc, unw_cursor_t *cursor,
char functionBuf[512];
const char *functionName = functionBuf;
unw_word_t offset;
if ((unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
if ((__unw_get_proc_name(cursor, functionBuf, sizeof(functionBuf),
&offset) != UNW_ESUCCESS) ||
(frameInfo.start_ip + offset > frameInfo.end_ip))
functionName = ".anonymous.";
_LIBUNWIND_TRACE_UNWINDING(
@ -309,7 +316,7 @@ unwind_phase2_forced(unw_context_t *uc, unw_cursor_t *cursor,
"_URC_INSTALL_CONTEXT",
(void *)exception_object);
// We may get control back if landing pad calls _Unwind_Resume().
unw_resume(cursor);
__unw_resume(cursor);
break;
default:
// Personality routine returned an unknown result code.
@ -345,7 +352,7 @@ _Unwind_RaiseException(_Unwind_Exception *exception_object) {
(void *)exception_object);
unw_context_t uc;
unw_cursor_t cursor;
unw_getcontext(&uc);
__unw_getcontext(&uc);
// Mark that this is a non-forced unwind, so _Unwind_Resume()
// can do the right thing.
@ -379,7 +386,7 @@ _Unwind_Resume(_Unwind_Exception *exception_object) {
_LIBUNWIND_TRACE_API("_Unwind_Resume(ex_obj=%p)", (void *)exception_object);
unw_context_t uc;
unw_cursor_t cursor;
unw_getcontext(&uc);
__unw_getcontext(&uc);
if (exception_object->private_1 != 0)
unwind_phase2_forced(&uc, &cursor, exception_object,
@ -404,7 +411,7 @@ _Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
(void *)exception_object, (void *)(uintptr_t)stop);
unw_context_t uc;
unw_cursor_t cursor;
unw_getcontext(&uc);
__unw_getcontext(&uc);
// Mark that this is a forced unwind, so _Unwind_Resume() can do
// the right thing.
@ -422,7 +429,7 @@ _Unwind_GetLanguageSpecificData(struct _Unwind_Context *context) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_proc_info_t frameInfo;
uintptr_t result = 0;
if (unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
if (__unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
result = (uintptr_t)frameInfo.lsda;
_LIBUNWIND_TRACE_API(
"_Unwind_GetLanguageSpecificData(context=%p) => 0x%" PRIxPTR,
@ -443,7 +450,7 @@ _Unwind_GetRegionStart(struct _Unwind_Context *context) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_proc_info_t frameInfo;
uintptr_t result = 0;
if (unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
if (__unw_get_proc_info(cursor, &frameInfo) == UNW_ESUCCESS)
result = (uintptr_t)frameInfo.start_ip;
_LIBUNWIND_TRACE_API("_Unwind_GetRegionStart(context=%p) => 0x%" PRIxPTR,
(void *)context, result);
@ -468,7 +475,7 @@ _LIBUNWIND_EXPORT uintptr_t
_Unwind_GetGR(struct _Unwind_Context *context, int index) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_word_t result;
unw_get_reg(cursor, index, &result);
__unw_get_reg(cursor, index, &result);
_LIBUNWIND_TRACE_API("_Unwind_GetGR(context=%p, reg=%d) => 0x%" PRIxPTR,
(void *)context, index, result);
return (uintptr_t)result;
@ -481,14 +488,14 @@ _LIBUNWIND_EXPORT void _Unwind_SetGR(struct _Unwind_Context *context, int index,
")",
(void *)context, index, value);
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_set_reg(cursor, index, value);
__unw_set_reg(cursor, index, value);
}
/// Called by personality handler during phase 2 to get instruction pointer.
_LIBUNWIND_EXPORT uintptr_t _Unwind_GetIP(struct _Unwind_Context *context) {
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_word_t result;
unw_get_reg(cursor, UNW_REG_IP, &result);
__unw_get_reg(cursor, UNW_REG_IP, &result);
_LIBUNWIND_TRACE_API("_Unwind_GetIP(context=%p) => 0x%" PRIxPTR,
(void *)context, result);
return (uintptr_t)result;
@ -502,7 +509,7 @@ _LIBUNWIND_EXPORT void _Unwind_SetIP(struct _Unwind_Context *context,
_LIBUNWIND_TRACE_API("_Unwind_SetIP(context=%p, value=0x%0" PRIxPTR ")",
(void *)context, value);
unw_cursor_t *cursor = (unw_cursor_t *)context;
unw_set_reg(cursor, UNW_REG_IP, value);
__unw_set_reg(cursor, UNW_REG_IP, value);
}
#endif // !defined(_LIBUNWIND_ARM_EHABI) && !defined(__USING_SJLJ_EXCEPTIONS__)

30
libunwind/src/UnwindRegistersRestore.S
View File

@ -13,7 +13,7 @@
#if !defined(__USING_SJLJ_EXCEPTIONS__)
#if defined(__i386__)
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_x866jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_x866jumptoEv)
#
# void libunwind::Registers_x86::jumpto()
#
@ -60,7 +60,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_x866jumptoEv)
#elif defined(__x86_64__)
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind16Registers_x86_646jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind16Registers_x86_646jumptoEv)
#
# void libunwind::Registers_x86_64::jumpto()
#
@ -129,7 +129,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind16Registers_x86_646jumptoEv)
#elif defined(__powerpc64__)
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_ppc646jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind15Registers_ppc646jumptoEv)
//
// void libunwind::Registers_ppc64::jumpto()
//
@ -394,7 +394,7 @@ Lnovec:
#elif defined(__ppc__)
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_ppc6jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_ppc6jumptoEv)
;
; void libunwind::Registers_ppc::jumpto()
;
@ -566,7 +566,7 @@ Lnovec:
// thread_state pointer is in x0
//
.p2align 2
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
// skip restore of x0,x1 for now
ldp x2, x3, [x0, #0x010]
ldp x4, x5, [x0, #0x020]
@ -620,7 +620,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
@ thread_state pointer is in r0
@
.p2align 2
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJumpToEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJumpToEv)
#if !defined(__ARM_ARCH_ISA_ARM) && __ARM_ARCH_ISA_THUMB == 1
@ r8-r11: ldm into r1-r4, then mov to r8-r11
adds r0, #0x20
@ -658,7 +658,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJu
#if defined(__ELF__)
.fpu vfpv3-d16
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMDEPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMDEPv)
@ VFP and iwMMX instructions are only available when compiling with the flags
@ that enable them. We do not want to do that in the library (because we do not
@ want the compiler to generate instructions that access those) but this is
@ -679,7 +679,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFL
#if defined(__ELF__)
.fpu vfpv3-d16
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMXEPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMXEPv)
vldmia r0, {d0-d15} @ fldmiax is deprecated in ARMv7+ and now behaves like vldmia
JMP(lr)
@ -693,7 +693,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFL
#if defined(__ELF__)
.fpu vfpv3
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPv)
vldmia r0, {d16-d31}
JMP(lr)
@ -709,7 +709,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPv)
#if defined(__ELF__)
.arch armv5te
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPv)
ldcl p1, cr0, [r0], #8 @ wldrd wR0, [r0], #8
ldcl p1, cr1, [r0], #8 @ wldrd wR1, [r0], #8
ldcl p1, cr2, [r0], #8 @ wldrd wR2, [r0], #8
@ -738,7 +738,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPv)
#if defined(__ELF__)
.arch armv5te
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXControlEPj)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXControlEPj)
ldc2 p1, cr8, [r0], #4 @ wldrw wCGR0, [r0], #4
ldc2 p1, cr9, [r0], #4 @ wldrw wCGR1, [r0], #4
ldc2 p1, cr10, [r0], #4 @ wldrw wCGR2, [r0], #4
@ -749,7 +749,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXCont
#elif defined(__or1k__)
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
#
# void libunwind::Registers_or1k::jumpto()
#
@ -808,7 +808,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
// On entry:
// thread state pointer is in a0 ($4)
//
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
.set push
.set noat
.set noreorder
@ -917,7 +917,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
// On entry:
// thread state pointer is in a0 ($4)
//
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
.set push
.set noat
.set noreorder
@ -1007,7 +1007,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
// On entry:
// thread_state pointer is in o0
//
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_sparc6jumptoEv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind15Registers_sparc6jumptoEv)
ta 3
ldd [%o0 + 64], %l0
ldd [%o0 + 72], %l2

58
libunwind/src/UnwindRegistersSave.S
View File

@ -15,7 +15,7 @@
#if defined(__i386__)
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# + +
@ -26,7 +26,7 @@
# +-----------------------+ <-- SP
# + +
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
push %eax
movl 8(%esp), %eax
movl %ebx, 4(%eax)
@ -56,12 +56,12 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__x86_64__)
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# thread_state pointer is in rdi
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
#if defined(_WIN64)
#define PTR %rcx
#define TMP %rdx
@ -118,12 +118,12 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__mips__) && defined(_ABIO32) && _MIPS_SIM == _ABIO32
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# thread_state pointer is in a0 ($4)
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
.set push
.set noat
.set noreorder
@ -227,12 +227,12 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__mips64)
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# thread_state pointer is in a0 ($4)
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
.set push
.set noat
.set noreorder
@ -317,21 +317,21 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
# elif defined(__mips__)
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# Just trap for the time being.
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
teq $0, $0
#elif defined(__powerpc64__)
//
// extern int unw_getcontext(unw_context_t* thread_state)
// extern int __unw_getcontext(unw_context_t* thread_state)
//
// On entry:
// thread_state pointer is in r3
//
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
// store register (GPR)
#define PPC64_STR(n) \
@ -557,12 +557,12 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__ppc__)
;
; extern int unw_getcontext(unw_context_t* thread_state)
; extern int __unw_getcontext(unw_context_t* thread_state)
;
; On entry:
; thread_state pointer is in r3
;
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
stw r0, 8(r3)
mflr r0
stw r0, 0(r3) ; store lr as ssr0
@ -700,13 +700,13 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__arm64__) || defined(__aarch64__)
//
// extern int unw_getcontext(unw_context_t* thread_state)
// extern int __unw_getcontext(unw_context_t* thread_state)
//
// On entry:
// thread_state pointer is in x0
//
.p2align 2
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
stp x0, x1, [x0, #0x000]
stp x2, x3, [x0, #0x010]
stp x4, x5, [x0, #0x020]
@ -754,7 +754,7 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#endif
@
@ extern int unw_getcontext(unw_context_t* thread_state)
@ extern int __unw_getcontext(unw_context_t* thread_state)
@
@ On entry:
@ thread_state pointer is in r0
@ -763,10 +763,10 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
@ EHABI #7.4.5 notes that in general all VRS registers should be restored
@ however this is very hard to do for VFP registers because it is unknown
@ to the library how many registers are implemented by the architecture.
@ Instead, VFP registers are demand saved by logic external to unw_getcontext.
@ Instead, VFP registers are demand saved by logic external to __unw_getcontext.
@
.p2align 2
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
#if !defined(__ARM_ARCH_ISA_ARM) && __ARM_ARCH_ISA_THUMB == 1
stm r0!, {r0-r7}
mov r1, r8
@ -807,7 +807,7 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#if defined(__ELF__)
.fpu vfpv3-d16
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMDEPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMDEPv)
vstmia r0, {d0-d15}
JMP(lr)
@ -821,7 +821,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMD
#if defined(__ELF__)
.fpu vfpv3-d16
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMXEPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMXEPv)
vstmia r0, {d0-d15} @ fstmiax is deprecated in ARMv7+ and now behaves like vstmia
JMP(lr)
@ -835,7 +835,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMX
#if defined(__ELF__)
.fpu vfpv3
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveVFPv3EPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm9saveVFPv3EPv)
@ VFP and iwMMX instructions are only available when compiling with the flags
@ that enable them. We do not want to do that in the library (because we do not
@ want the compiler to generate instructions that access those) but this is
@ -858,7 +858,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveVFPv3EPv)
#if defined(__ELF__)
.arch armv5te
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveiWMMXEPv)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm9saveiWMMXEPv)
stcl p1, cr0, [r0], #8 @ wstrd wR0, [r0], #8
stcl p1, cr1, [r0], #8 @ wstrd wR1, [r0], #8
stcl p1, cr2, [r0], #8 @ wstrd wR2, [r0], #8
@ -887,7 +887,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveiWMMXEPv)
#if defined(__ELF__)
.arch armv5te
#endif
DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveiWMMXControlEPj)
DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm16saveiWMMXControlEPj)
stc2 p1, cr8, [r0], #4 @ wstrw wCGR0, [r0], #4
stc2 p1, cr9, [r0], #4 @ wstrw wCGR1, [r0], #4
stc2 p1, cr10, [r0], #4 @ wstrw wCGR2, [r0], #4
@ -899,12 +899,12 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveiWMMXControl
#elif defined(__or1k__)
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# thread_state pointer is in r3
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
l.sw 0(r3), r0
l.sw 4(r3), r1
l.sw 8(r3), r2
@ -945,12 +945,12 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#elif defined(__sparc__)
#
# extern int unw_getcontext(unw_context_t* thread_state)
# extern int __unw_getcontext(unw_context_t* thread_state)
#
# On entry:
# thread_state pointer is in o0
#
DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
ta 3
add %o7, 8, %o7
std %g0, [%o0 + 0]
@ -974,4 +974,6 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
#endif
#endif /* !defined(__USING_SJLJ_EXCEPTIONS__) */
WEAK_ALIAS(__unw_getcontext, unw_getcontext)
NO_EXEC_STACK_DIRECTIVE

46
libunwind/src/assembly.h
View File

@ -45,6 +45,11 @@
#define SYMBOL_IS_FUNC(name)
#define EXPORT_SYMBOL(name)
#define HIDDEN_SYMBOL(name) .private_extern name
#define WEAK_SYMBOL(name) .weak_reference name
#define WEAK_ALIAS(name, aliasname) \
WEAK_SYMBOL(aliasname) SEPARATOR \
SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
#define NO_EXEC_STACK_DIRECTIVE
#elif defined(__ELF__)
@ -56,6 +61,10 @@
#endif
#define EXPORT_SYMBOL(name)
#define HIDDEN_SYMBOL(name) .hidden name
#define WEAK_SYMBOL(name) .weak name
#define WEAK_ALIAS(name, aliasname) \
WEAK_SYMBOL(aliasname) SEPARATOR \
SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
#if defined(__GNU__) || defined(__FreeBSD__) || defined(__Fuchsia__) || \
defined(__linux__)
@ -71,9 +80,9 @@
.scl 2 SEPARATOR \
.type 32 SEPARATOR \
.endef
#define EXPORT_SYMBOL2(name) \
.section .drectve,"yn" SEPARATOR \
.ascii "-export:", #name, "\0" SEPARATOR \
#define EXPORT_SYMBOL2(name) \
.section .drectve,"yn" SEPARATOR \
.ascii "-export:", #name, "\0" SEPARATOR \
.text
#if defined(_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS)
#define EXPORT_SYMBOL(name)
@ -82,6 +91,23 @@
#endif
#define HIDDEN_SYMBOL(name)
#if defined(__MINGW32__)
#define WEAK_ALIAS(name, aliasname) \
.globl SYMBOL_NAME(aliasname) SEPARATOR \
EXPORT_SYMBOL(aliasname) SEPARATOR \
SYMBOL_NAME(aliasname) = SYMBOL_NAME(name)
#else
#define WEAK_ALIAS3(name, aliasname) \
.section .drectve,"yn" SEPARATOR \
.ascii "-alternatename:", #aliasname, "=", #name, "\0" SEPARATOR \
.text
#define WEAK_ALIAS2(name, aliasname) \
WEAK_ALIAS3(name, aliasname)
#define WEAK_ALIAS(name, aliasname) \
EXPORT_SYMBOL(SYMBOL_NAME(aliasname)) SEPARATOR \
WEAK_ALIAS2(SYMBOL_NAME(name), SYMBOL_NAME(aliasname))
#endif
#define NO_EXEC_STACK_DIRECTIVE
#elif defined(__sparc__)
@ -92,16 +118,10 @@
#endif
#define DEFINE_LIBUNWIND_FUNCTION(name) \
.globl SYMBOL_NAME(name) SEPARATOR \
EXPORT_SYMBOL(name) SEPARATOR \
SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
SYMBOL_NAME(name):
#define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name) \
.globl SYMBOL_NAME(name) SEPARATOR \
HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \
SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
#define DEFINE_LIBUNWIND_FUNCTION(name) \
.globl SYMBOL_NAME(name) SEPARATOR \
HIDDEN_SYMBOL(SYMBOL_NAME(name)) SEPARATOR \
SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
SYMBOL_NAME(name):
#if defined(__arm__)

30
libunwind/src/config.h
View File

@ -62,6 +62,36 @@
#endif
#endif
#define STR(a) #a
#define XSTR(a) STR(a)
#define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name
#if defined(__APPLE__)
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
__asm__(".globl " SYMBOL_NAME(aliasname)); \
__asm__(SYMBOL_NAME(aliasname) " = " SYMBOL_NAME(name)); \
_LIBUNWIND_EXPORT \
extern "C" __typeof(name) aliasname __attribute__((weak_import));
#elif defined(__ELF__)
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
_LIBUNWIND_EXPORT \
extern "C" __typeof(name) aliasname __attribute__((weak, alias(#name)));
#elif defined(_WIN32)
#if defined(__MINGW32__)
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
_LIBUNWIND_EXPORT \
extern "C" __typeof(name) aliasname __attribute__((alias(#name)));
#else
#define _LIBUNWIND_WEAK_ALIAS(name, aliasname) \
__pragma(comment(linker, "/alternatename:" SYMBOL_NAME(aliasname) "=" \
SYMBOL_NAME(name))) \
_LIBUNWIND_EXPORT \
extern "C" __typeof(name) aliasname;
#endif
#else
#error Unsupported target
#endif
#if (defined(__APPLE__) && defined(__arm__)) || defined(__USING_SJLJ_EXCEPTIONS__)
#define _LIBUNWIND_BUILD_SJLJ_APIS
#endif

114
libunwind/src/libunwind.cpp
View File

@ -29,15 +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__)
@ -75,11 +71,12 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor,
return UNW_ESUCCESS;
}
_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;
@ -89,12 +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;
@ -120,12 +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;
@ -135,16 +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;
@ -154,20 +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);
@ -176,21 +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;
@ -199,58 +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_cfp_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(
@ -264,12 +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);
}

31
libunwind/src/libunwind_ext.h
View File

@ -22,15 +22,34 @@
#ifdef __cplusplus
extern "C" {
#endif
extern int __unw_getcontext(unw_context_t *);
extern int __unw_init_local(unw_cursor_t *, unw_context_t *);
extern int __unw_step(unw_cursor_t *);
extern int __unw_get_reg(unw_cursor_t *, unw_regnum_t, unw_word_t *);
extern int __unw_get_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t *);
extern int __unw_set_reg(unw_cursor_t *, unw_regnum_t, unw_word_t);
extern int __unw_set_fpreg(unw_cursor_t *, unw_regnum_t, unw_fpreg_t);
extern int __unw_resume(unw_cursor_t *);
#ifdef __arm__
/* Save VFP registers in FSTMX format (instead of FSTMD). */
extern void __unw_save_vfp_as_X(unw_cursor_t *);
#endif
extern const char *__unw_regname(unw_cursor_t *, unw_regnum_t);
extern int __unw_get_proc_info(unw_cursor_t *, unw_proc_info_t *);
extern int __unw_is_fpreg(unw_cursor_t *, unw_regnum_t);
extern int __unw_is_signal_frame(unw_cursor_t *);
extern int __unw_get_proc_name(unw_cursor_t *, char *, size_t, unw_word_t *);
// SPI
extern 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));
extern 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));
// IPI
extern void _unw_add_dynamic_fde(unw_word_t fde);
extern void _unw_remove_dynamic_fde(unw_word_t fde);
extern void __unw_add_dynamic_fde(unw_word_t fde);
extern void __unw_remove_dynamic_fde(unw_word_t fde);
#if defined(_LIBUNWIND_ARM_EHABI)
extern const uint32_t* decode_eht_entry(const uint32_t*, size_t*, size_t*);