Portable DebugBreak().

--HG--
branch : develop
This commit is contained in:
Roman Telezhynskyi 2015-09-13 15:00:33 +03:00
parent 59389aa049
commit 7e2082fc0a
3 changed files with 135 additions and 16 deletions

128
src/libs/vmisc/debugbreak.h Normal file
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@ -0,0 +1,128 @@
/* Copyright (c) 2011-2015, Scott Tsai
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef DEBUG_BREAK_H
#define DEBUG_BREAK_H
#ifdef _MSC_VER
#define debug_break __debugbreak
#else
#include <signal.h>
#ifdef __cplusplus
extern "C" {
#endif
enum {
/* gcc optimizers consider code after __builtin_trap() dead.
* Making __builtin_trap() unsuitable for breaking into the debugger */
DEBUG_BREAK_PREFER_BUILTIN_TRAP_TO_SIGTRAP = 0,
};
#if defined(__i386__) || defined(__x86_64__)
enum { HAVE_TRAP_INSTRUCTION = 1, };
__attribute__((gnu_inline, always_inline))
static void __inline__ trap_instruction(void)
{
__asm__ volatile("int $0x03");
}
#elif defined(__thumb__)
enum { HAVE_TRAP_INSTRUCTION = 1, };
/* FIXME: handle __THUMB_INTERWORK__ */
__attribute__((gnu_inline, always_inline))
static void __inline__ trap_instruction(void)
{
/* See 'arm-linux-tdep.c' in GDB source.
* Both instruction sequences below work. */
#if 1
/* 'eabi_linux_thumb_le_breakpoint' */
__asm__ volatile(".inst 0xde01");
#else
/* 'eabi_linux_thumb2_le_breakpoint' */
__asm__ volatile(".inst.w 0xf7f0a000");
#endif
/* Known problem:
* After a breakpoint hit, can't stepi, step, or continue in GDB.
* 'step' stuck on the same instruction.
*
* Workaround: a new GDB command,
* 'debugbreak-step' is defined in debugbreak-gdb.py
* that does:
* (gdb) set $instruction_len = 2
* (gdb) tbreak *($pc + $instruction_len)
* (gdb) jump *($pc + $instruction_len)
*/
}
#elif defined(__arm__) && !defined(__thumb__)
enum { HAVE_TRAP_INSTRUCTION = 1, };
__attribute__((gnu_inline, always_inline))
static void __inline__ trap_instruction(void)
{
/* See 'arm-linux-tdep.c' in GDB source,
* 'eabi_linux_arm_le_breakpoint' */
__asm__ volatile(".inst 0xe7f001f0");
/* Has same known problem and workaround
* as Thumb mode */
}
#elif defined(__aarch64__)
enum { HAVE_TRAP_INSTRUCTION = 1, };
__attribute__((gnu_inline, always_inline))
static void __inline__ trap_instruction(void)
{
/* See 'aarch64-tdep.c' in GDB source,
* 'aarch64_default_breakpoint' */
__asm__ volatile(".inst 0xd4200000");
}
#else
enum { HAVE_TRAP_INSTRUCTION = 0, };
#endif
__attribute__((gnu_inline, always_inline))
static void __inline__ debug_break(void)
{
if (HAVE_TRAP_INSTRUCTION) {
trap_instruction();
} else if (DEBUG_BREAK_PREFER_BUILTIN_TRAP_TO_SIGTRAP) {
/* raises SIGILL on Linux x86{,-64}, to continue in gdb:
* (gdb) handle SIGILL stop nopass
* */
__builtin_trap();
} else {
raise(SIGTRAP);
}
}
#ifdef __cplusplus
}
#endif
#endif
#endif

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@ -36,6 +36,8 @@
#include <windows.h>
#endif /* Q_OS_WIN */
#include "debugbreak.h"
#define SceneSize 50000
#define DefPointRadius 1.5//mm
@ -160,7 +162,6 @@ enum class GSizes : unsigned char { ALL,
* https://stackoverflow.com/questions/1721543/continue-to-debug-after-failed-assertion-on-linux-c-c
*/
#ifndef V_NO_ASSERT
#ifdef Q_OS_WIN32
#ifdef Q_CC_MSVC
#define SCASSERT(cond) \
{ \
@ -168,11 +169,11 @@ enum class GSizes : unsigned char { ALL,
{ \
qDebug("ASSERT: %s in %s (%s:%u)", \
#cond, __FUNCSIG__, __FILE__, __LINE__); \
DebugBreak(); \
debug_break(); \
} \
} \
#else // GCC (Windows)
#else // GCC/Clang
#define SCASSERT(cond) \
{ \
@ -180,23 +181,12 @@ enum class GSizes : unsigned char { ALL,
{ \
qDebug("ASSERT: %s in %s (%s:%u)", \
#cond, __PRETTY_FUNCTION__, __FILE__, __LINE__);\
DebugBreak(); \
debug_break(); \
} \
} \
#endif /*Q_CC_MSVC*/
#else // UNIX
#define SCASSERT(cond) \
{ \
if (!(cond)) \
{ \
qDebug("ASSERT: %s in %s (%s:%u)", \
#cond, __PRETTY_FUNCTION__, __FILE__, __LINE__);\
std::raise(SIGTRAP); \
} \
} \
#endif /* Q_OS_WIN32 */
#else // define but disable this function if debugging is not set
#define SCASSERT(cond) qt_noop();
#endif /* V_NO_ASSERT */

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@ -25,4 +25,5 @@ HEADERS += \
$$PWD/vabstractapplication.h \
$$PWD/projectversion.h \
$$PWD/vcommonsettings.h \
$$PWD/vtapesettings.h
$$PWD/vtapesettings.h \
debugbreak.h