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-rw-r--r--src/UnwindLevel1.c120
1 files changed, 63 insertions, 57 deletions
diff --git a/src/UnwindLevel1.c b/src/UnwindLevel1.c
index 0a04438bba2f..bcb1a7fbec2a 100644
--- a/src/UnwindLevel1.c
+++ b/src/UnwindLevel1.c
@@ -1,13 +1,12 @@
//===------------------------- UnwindLevel1.c -----------------------------===//
//
-// 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 C++ ABI Exception Handling Level 1 as documented at:
-// http://mentorembedded.github.io/cxx-abi/abi-eh.html
+// https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
// using libunwind
//
//===----------------------------------------------------------------------===//
@@ -26,9 +25,10 @@
#include <stdio.h>
#include <string.h>
+#include "config.h"
#include "libunwind.h"
+#include "libunwind_ext.h"
#include "unwind.h"
-#include "config.h"
#if !defined(_LIBUNWIND_ARM_EHABI) && !defined(__USING_SJLJ_EXCEPTIONS__)
@@ -36,33 +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;
}
@@ -71,12 +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 "",
@@ -100,7 +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",
@@ -129,7 +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);
@@ -139,27 +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;
}
@@ -168,8 +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
@@ -212,15 +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.
@@ -240,15 +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;
@@ -259,8 +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(
@@ -310,7 +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.
@@ -346,7 +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.
@@ -380,7 +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,
@@ -405,7 +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.
@@ -423,7 +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,
@@ -444,7 +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);
@@ -469,7 +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;
@@ -482,14 +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;
@@ -503,7 +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__)