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GDBStub: Support watchpoints on linux (#1030)

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* GDBStub: Support watchpoints on linux
* GDBStub: Use `TCP_NODELAY`
This commit is contained in:
GaryOderNichts 2023-12-24 00:25:01 +01:00 committed by GitHub
parent bab1616565
commit 4405116324
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 371 additions and 197 deletions
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1
src/Cafe/CMakeLists.txt
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@ -40,6 +40,7 @@ add_library(CemuCafe
HW/Espresso/Debugger/DebugSymbolStorage.h
HW/Espresso/Debugger/GDBStub.h
HW/Espresso/Debugger/GDBStub.cpp
HW/Espresso/Debugger/GDBBreakpoints.cpp
HW/Espresso/Debugger/GDBBreakpoints.h
HW/Espresso/EspressoISA.h
HW/Espresso/Interpreter/PPCInterpreterALU.hpp

304
src/Cafe/HW/Espresso/Debugger/GDBBreakpoints.cpp Normal file
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@ -0,0 +1,304 @@
#include "GDBBreakpoints.h"
#include "Debugger.h"
#include "Cafe/HW/Espresso/Recompiler/PPCRecompiler.h"
#if defined(ARCH_X86_64) && BOOST_OS_LINUX
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/user.h>
DRType _GetDR(pid_t tid, int drIndex)
{
size_t drOffset = offsetof(struct user, u_debugreg) + drIndex * sizeof(user::u_debugreg[0]);
long v;
v = ptrace(PTRACE_PEEKUSER, tid, drOffset, nullptr);
if (v == -1)
perror("ptrace(PTRACE_PEEKUSER)");
return (DRType)v;
}
void _SetDR(pid_t tid, int drIndex, DRType newValue)
{
size_t drOffset = offsetof(struct user, u_debugreg) + drIndex * sizeof(user::u_debugreg[0]);
long rc = ptrace(PTRACE_POKEUSER, tid, drOffset, newValue);
if (rc == -1)
perror("ptrace(PTRACE_POKEUSER)");
}
DRType _ReadDR6()
{
pid_t tid = gettid();
// linux doesn't let us attach to the current thread / threads in the current thread group
// we have to create a child process which then modifies the debug registers and quits
pid_t child = fork();
if (child == -1)
{
perror("fork");
return 0;
}
if (child == 0)
{
if (ptrace(PTRACE_ATTACH, tid, nullptr, nullptr))
{
perror("attach");
_exit(0);
}
waitpid(tid, NULL, 0);
uint64_t dr6 = _GetDR(tid, 6);
if (ptrace(PTRACE_DETACH, tid, nullptr, nullptr))
perror("detach");
// since the status code only uses the lower 8 bits, we have to discard the rest of DR6
// this should be fine though, since the lower 4 bits of DR6 contain all the bp conditions
_exit(dr6 & 0xff);
}
// wait for child process
int wstatus;
waitpid(child, &wstatus, 0);
return (DRType)WEXITSTATUS(wstatus);
}
#endif
GDBServer::ExecutionBreakpoint::ExecutionBreakpoint(MPTR address, BreakpointType type, bool visible, std::string reason)
: m_address(address), m_removedAfterInterrupt(false), m_reason(std::move(reason))
{
if (type == BreakpointType::BP_SINGLE)
{
this->m_pauseThreads = true;
this->m_restoreAfterInterrupt = false;
this->m_deleteAfterAnyInterrupt = false;
this->m_pauseOnNextInterrupt = false;
this->m_visible = visible;
}
else if (type == BreakpointType::BP_PERSISTENT)
{
this->m_pauseThreads = true;
this->m_restoreAfterInterrupt = true;
this->m_deleteAfterAnyInterrupt = false;
this->m_pauseOnNextInterrupt = false;
this->m_visible = visible;
}
else if (type == BreakpointType::BP_RESTORE_POINT)
{
this->m_pauseThreads = false;
this->m_restoreAfterInterrupt = false;
this->m_deleteAfterAnyInterrupt = false;
this->m_pauseOnNextInterrupt = false;
this->m_visible = false;
}
else if (type == BreakpointType::BP_STEP_POINT)
{
this->m_pauseThreads = false;
this->m_restoreAfterInterrupt = false;
this->m_deleteAfterAnyInterrupt = true;
this->m_pauseOnNextInterrupt = true;
this->m_visible = false;
}
this->m_origOpCode = memory_readU32(address);
memory_writeU32(address, DEBUGGER_BP_T_GDBSTUB_TW);
PPCRecompiler_invalidateRange(address, address + 4);
}
GDBServer::ExecutionBreakpoint::~ExecutionBreakpoint()
{
memory_writeU32(this->m_address, this->m_origOpCode);
PPCRecompiler_invalidateRange(this->m_address, this->m_address + 4);
}
uint32 GDBServer::ExecutionBreakpoint::GetVisibleOpCode() const
{
if (this->m_visible)
return memory_readU32(this->m_address);
else
return this->m_origOpCode;
}
void GDBServer::ExecutionBreakpoint::RemoveTemporarily()
{
memory_writeU32(this->m_address, this->m_origOpCode);
PPCRecompiler_invalidateRange(this->m_address, this->m_address + 4);
this->m_restoreAfterInterrupt = true;
}
void GDBServer::ExecutionBreakpoint::Restore()
{
memory_writeU32(this->m_address, DEBUGGER_BP_T_GDBSTUB_TW);
PPCRecompiler_invalidateRange(this->m_address, this->m_address + 4);
this->m_restoreAfterInterrupt = false;
}
namespace coreinit
{
#if BOOST_OS_LINUX
std::vector<pid_t>& OSGetSchedulerThreadIds();
#endif
std::vector<std::thread::native_handle_type>& OSGetSchedulerThreads();
}
GDBServer::AccessBreakpoint::AccessBreakpoint(MPTR address, AccessPointType type)
: m_address(address), m_type(type)
{
#if defined(ARCH_X86_64) && BOOST_OS_WINDOWS
for (auto& hThreadNH : coreinit::OSGetSchedulerThreads())
{
HANDLE hThread = (HANDLE)hThreadNH;
CONTEXT ctx{};
ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
SuspendThread(hThread);
GetThreadContext(hThread, &ctx);
// use BP 2/3 for gdb stub since cemu's internal debugger uses BP 0/1 already
ctx.Dr2 = (DWORD64)memory_getPointerFromVirtualOffset(address);
ctx.Dr3 = (DWORD64)memory_getPointerFromVirtualOffset(address);
// breakpoint 2
SetBits(ctx.Dr7, 4, 1, 1); // breakpoint #3 enabled: true
SetBits(ctx.Dr7, 24, 2, 1); // breakpoint #3 condition: 1 (write)
SetBits(ctx.Dr7, 26, 2, 3); // breakpoint #3 length: 3 (4 bytes)
// breakpoint 3
SetBits(ctx.Dr7, 6, 1, 1); // breakpoint #4 enabled: true
SetBits(ctx.Dr7, 28, 2, 3); // breakpoint #4 condition: 3 (read & write)
SetBits(ctx.Dr7, 30, 2, 3); // breakpoint #4 length: 3 (4 bytes)
SetThreadContext(hThread, &ctx);
ResumeThread(hThread);
}
#elif defined(ARCH_X86_64) && BOOST_OS_LINUX
// linux doesn't let us attach to threads which are in the same thread group as our current thread
// we have to create a child process which then modifies the debug registers and quits
pid_t child = fork();
if (child == -1)
{
perror("fork");
return;
}
if (child == 0)
{
for (pid_t tid : coreinit::OSGetSchedulerThreadIds())
{
long rc = ptrace(PTRACE_ATTACH, tid, nullptr, nullptr);
if (rc == -1)
perror("ptrace(PTRACE_ATTACH)");
waitpid(tid, nullptr, 0);
DRType dr7 = _GetDR(tid, 7);
// use BP 2/3 for gdb stub since cemu's internal debugger uses BP 0/1 already
DRType dr2 = (uint64)memory_getPointerFromVirtualOffset(address);
DRType dr3 = (uint64)memory_getPointerFromVirtualOffset(address);
// breakpoint 2
SetBits(dr7, 4, 1, 1); // breakpoint #3 enabled: true
SetBits(dr7, 24, 2, 1); // breakpoint #3 condition: 1 (write)
SetBits(dr7, 26, 2, 3); // breakpoint #3 length: 3 (4 bytes)
// breakpoint 3
SetBits(dr7, 6, 1, 1); // breakpoint #4 enabled: true
SetBits(dr7, 28, 2, 3); // breakpoint #4 condition: 3 (read & write)
SetBits(dr7, 30, 2, 3); // breakpoint #4 length: 3 (4 bytes)
_SetDR(tid, 2, dr2);
_SetDR(tid, 3, dr3);
_SetDR(tid, 7, dr7);
rc = ptrace(PTRACE_DETACH, tid, nullptr, nullptr);
if (rc == -1)
perror("ptrace(PTRACE_DETACH)");
}
// exit child process
_exit(0);
}
// wait for child process
waitpid(child, nullptr, 0);
#else
cemuLog_log(LogType::Force, "Debugger read/write breakpoints are not supported on non-x86 CPUs yet.");
#endif
}
GDBServer::AccessBreakpoint::~AccessBreakpoint()
{
#if defined(ARCH_X86_64) && BOOST_OS_WINDOWS
for (auto& hThreadNH : coreinit::OSGetSchedulerThreads())
{
HANDLE hThread = (HANDLE)hThreadNH;
CONTEXT ctx{};
ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
SuspendThread(hThread);
GetThreadContext(hThread, &ctx);
// reset BP 2/3 to zero
ctx.Dr2 = (DWORD64)0;
ctx.Dr3 = (DWORD64)0;
// breakpoint 2
SetBits(ctx.Dr7, 4, 1, 0);
SetBits(ctx.Dr7, 24, 2, 0);
SetBits(ctx.Dr7, 26, 2, 0);
// breakpoint 3
SetBits(ctx.Dr7, 6, 1, 0);
SetBits(ctx.Dr7, 28, 2, 0);
SetBits(ctx.Dr7, 30, 2, 0);
SetThreadContext(hThread, &ctx);
ResumeThread(hThread);
}
#elif defined(ARCH_X86_64) && BOOST_OS_LINUX
// linux doesn't let us attach to threads which are in the same thread group as our current thread
// we have to create a child process which then modifies the debug registers and quits
pid_t child = fork();
if (child == -1)
{
perror("fork");
return;
}
if (child == 0)
{
for (pid_t tid : coreinit::OSGetSchedulerThreadIds())
{
long rc = ptrace(PTRACE_ATTACH, tid, nullptr, nullptr);
if (rc == -1)
perror("ptrace(PTRACE_ATTACH)");
waitpid(tid, nullptr, 0);
DRType dr7 = _GetDR(tid, 7);
// reset BP 2/3 to zero
DRType dr2 = 0;
DRType dr3 = 0;
// breakpoint 2
SetBits(dr7, 4, 1, 0);
SetBits(dr7, 24, 2, 0);
SetBits(dr7, 26, 2, 0);
// breakpoint 3
SetBits(dr7, 6, 1, 0);
SetBits(dr7, 28, 2, 0);
SetBits(dr7, 30, 2, 0);
_SetDR(tid, 2, dr2);
_SetDR(tid, 3, dr3);
_SetDR(tid, 7, dr7);
rc = ptrace(PTRACE_DETACH, tid, nullptr, nullptr);
if (rc == -1)
perror("ptrace(PTRACE_DETACH)");
}
// exit child process
_exit(0);
}
// wait for child process
waitpid(child, nullptr, 0);
#endif
}

211
src/Cafe/HW/Espresso/Debugger/GDBBreakpoints.h
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@ -1,33 +1,18 @@
#pragma once
#include "GDBStub.h"
#include <utility>
#if defined(ARCH_X86_64) && BOOST_OS_LINUX && FALSE
#include <sys/ptrace.h>
#include <sys/wait.h>
#include <sys/user.h>
#if defined(ARCH_X86_64) && BOOST_OS_LINUX
#include <sys/types.h>
// helpers for accessing debug register
typedef unsigned long DRType;
DRType _GetDR(pid_t tid, int drIndex)
{
unsigned long v;
v = ptrace (PTRACE_PEEKUSER, tid, offsetof (struct user, u_debugreg[drIndex]), 0);
return (DRType)v;
}
void _SetDR(pid_t tid, int drIndex, DRType newValue)
{
unsigned long v = newValue;
ptrace (PTRACE_POKEUSER, tid, offsetof (struct user, u_debugreg[drIndex]), v);
}
DRType _GetDR(pid_t tid, int drIndex);
void _SetDR(pid_t tid, int drIndex, DRType newValue);
DRType _ReadDR6();
#endif
namespace coreinit
{
std::vector<std::thread::native_handle_type>& OSGetSchedulerThreads();
}
enum class BreakpointType
{
BP_SINGLE,
@ -38,59 +23,10 @@ enum class BreakpointType
class GDBServer::ExecutionBreakpoint {
public:
ExecutionBreakpoint(MPTR address, BreakpointType type, bool visible, std::string reason)
: m_address(address), m_removedAfterInterrupt(false), m_reason(std::move(reason))
{
if (type == BreakpointType::BP_SINGLE)
{
this->m_pauseThreads = true;
this->m_restoreAfterInterrupt = false;
this->m_deleteAfterAnyInterrupt = false;
this->m_pauseOnNextInterrupt = false;
this->m_visible = visible;
}
else if (type == BreakpointType::BP_PERSISTENT)
{
this->m_pauseThreads = true;
this->m_restoreAfterInterrupt = true;
this->m_deleteAfterAnyInterrupt = false;
this->m_pauseOnNextInterrupt = false;
this->m_visible = visible;
}
else if (type == BreakpointType::BP_RESTORE_POINT)
{
this->m_pauseThreads = false;
this->m_restoreAfterInterrupt = false;
this->m_deleteAfterAnyInterrupt = false;
this->m_pauseOnNextInterrupt = false;
this->m_visible = false;
}
else if (type == BreakpointType::BP_STEP_POINT)
{
this->m_pauseThreads = false;
this->m_restoreAfterInterrupt = false;
this->m_deleteAfterAnyInterrupt = true;
this->m_pauseOnNextInterrupt = true;
this->m_visible = false;
}
ExecutionBreakpoint(MPTR address, BreakpointType type, bool visible, std::string reason);
~ExecutionBreakpoint();
this->m_origOpCode = memory_readU32(address);
memory_writeU32(address, DEBUGGER_BP_T_GDBSTUB_TW);
PPCRecompiler_invalidateRange(address, address + 4);
};
~ExecutionBreakpoint()
{
memory_writeU32(this->m_address, this->m_origOpCode);
PPCRecompiler_invalidateRange(this->m_address, this->m_address + 4);
};
[[nodiscard]] uint32 GetVisibleOpCode() const
{
if (this->m_visible)
return memory_readU32(this->m_address);
else
return this->m_origOpCode;
};
[[nodiscard]] uint32 GetVisibleOpCode() const;
[[nodiscard]] bool ShouldBreakThreads() const
{
return this->m_pauseThreads;
@ -118,18 +54,8 @@ public:
return m_reason;
};
void RemoveTemporarily()
{
memory_writeU32(this->m_address, this->m_origOpCode);
PPCRecompiler_invalidateRange(this->m_address, this->m_address + 4);
this->m_restoreAfterInterrupt = true;
};
void Restore()
{
memory_writeU32(this->m_address, DEBUGGER_BP_T_GDBSTUB_TW);
PPCRecompiler_invalidateRange(this->m_address, this->m_address + 4);
this->m_restoreAfterInterrupt = false;
};
void RemoveTemporarily();
void Restore();
void PauseOnNextInterrupt()
{
this->m_pauseOnNextInterrupt = true;
@ -162,115 +88,8 @@ enum class AccessPointType
class GDBServer::AccessBreakpoint {
public:
AccessBreakpoint(MPTR address, AccessPointType type)
: m_address(address), m_type(type)
{
#if defined(ARCH_X86_64) && BOOST_OS_WINDOWS
for (auto& hThreadNH : coreinit::OSGetSchedulerThreads())
{
HANDLE hThread = (HANDLE)hThreadNH;
CONTEXT ctx{};
ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
SuspendThread(hThread);
GetThreadContext(hThread, &ctx);
// use BP 2/3 for gdb stub since cemu's internal debugger uses BP 0/1 already
ctx.Dr2 = (DWORD64)memory_getPointerFromVirtualOffset(address);
ctx.Dr3 = (DWORD64)memory_getPointerFromVirtualOffset(address);
// breakpoint 2
SetBits(ctx.Dr7, 4, 1, 1); // breakpoint #3 enabled: true
SetBits(ctx.Dr7, 24, 2, 1); // breakpoint #3 condition: 1 (write)
SetBits(ctx.Dr7, 26, 2, 3); // breakpoint #3 length: 3 (4 bytes)
// breakpoint 3
SetBits(ctx.Dr7, 6, 1, 1); // breakpoint #4 enabled: true
SetBits(ctx.Dr7, 28, 2, 3); // breakpoint #4 condition: 3 (read & write)
SetBits(ctx.Dr7, 30, 2, 3); // breakpoint #4 length: 3 (4 bytes)
SetThreadContext(hThread, &ctx);
ResumeThread(hThread);
}
// todo: port the following code to all unix platforms, they seem to differ quite a bit
#elif defined(ARCH_X86_64) && BOOST_OS_LINUX && FALSE
for (auto& hThreadNH : coreinit::OSGetSchedulerThreads())
{
pid_t pid = (pid_t)(uintptr_t)hThreadNH;
ptrace(PTRACE_ATTACH, pid, nullptr, nullptr);
waitpid(pid, nullptr, 0);
DRType dr7 = _GetDR(pid, 7);
// use BP 2/3 for gdb stub since cemu's internal debugger uses BP 0/1 already
DRType dr2 = (uint64)memory_getPointerFromVirtualOffset(address);
DRType dr3 = (uint64)memory_getPointerFromVirtualOffset(address);
// breakpoint 2
SetBits(dr7, 4, 1, 1); // breakpoint #3 enabled: true
SetBits(dr7, 24, 2, 1); // breakpoint #3 condition: 1 (write)
SetBits(dr7, 26, 2, 3); // breakpoint #3 length: 3 (4 bytes)
// breakpoint 3
SetBits(dr7, 6, 1, 1); // breakpoint #4 enabled: true
SetBits(dr7, 28, 2, 3); // breakpoint #4 condition: 3 (read & write)
SetBits(dr7, 30, 2, 3); // breakpoint #4 length: 3 (4 bytes)
_SetDR(pid, 2, dr2);
_SetDR(pid, 3, dr3);
_SetDR(pid, 7, dr7);
ptrace(PTRACE_DETACH, pid, nullptr, nullptr);
}
#else
cemuLog_log(LogType::Force, "Debugger read/write breakpoints are not supported on non-x86 CPUs yet.");
#endif
};
~AccessBreakpoint()
{
#if defined(ARCH_X86_64) && BOOST_OS_WINDOWS
for (auto& hThreadNH : coreinit::OSGetSchedulerThreads())
{
HANDLE hThread = (HANDLE)hThreadNH;
CONTEXT ctx{};
ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
SuspendThread(hThread);
GetThreadContext(hThread, &ctx);
// reset BP 2/3 to zero
ctx.Dr2 = (DWORD64)0;
ctx.Dr3 = (DWORD64)0;
// breakpoint 2
SetBits(ctx.Dr7, 4, 1, 0);
SetBits(ctx.Dr7, 24, 2, 0);
SetBits(ctx.Dr7, 26, 2, 0);
// breakpoint 3
SetBits(ctx.Dr7, 6, 1, 0);
SetBits(ctx.Dr7, 28, 2, 0);
SetBits(ctx.Dr7, 30, 2, 0);
SetThreadContext(hThread, &ctx);
ResumeThread(hThread);
}
#elif defined(ARCH_X86_64) && BOOST_OS_LINUX && FALSE
for (auto& hThreadNH : coreinit::OSGetSchedulerThreads())
{
pid_t pid = (pid_t)(uintptr_t)hThreadNH;
ptrace(PTRACE_ATTACH, pid, nullptr, nullptr);
waitpid(pid, nullptr, 0);
DRType dr7 = _GetDR(pid, 7);
// reset BP 2/3 to zero
DRType dr2 = 0;
DRType dr3 = 0;
// breakpoint 2
SetBits(dr7, 4, 1, 0);
SetBits(dr7, 24, 2, 0);
SetBits(dr7, 26, 2, 0);
// breakpoint 3
SetBits(dr7, 6, 1, 0);
SetBits(dr7, 28, 2, 0);
SetBits(dr7, 30, 2, 0);
_SetDR(pid, 2, dr2);
_SetDR(pid, 3, dr3);
_SetDR(pid, 7, dr7);
ptrace(PTRACE_DETACH, pid, nullptr, nullptr);
}
#endif
};
AccessBreakpoint(MPTR address, AccessPointType type);
~AccessBreakpoint();
MPTR GetAddress() const
{
@ -284,4 +103,4 @@ public:
private:
const MPTR m_address;
const AccessPointType m_type;
};
};

8
src/Cafe/HW/Espresso/Debugger/GDBStub.cpp
View File

@ -263,6 +263,14 @@ bool GDBServer::Initialize()
return false;
}
int nodelayEnabled = TRUE;
if (setsockopt(m_server_socket, IPPROTO_TCP, TCP_NODELAY, (char*)&nodelayEnabled, sizeof(nodelayEnabled)) == SOCKET_ERROR)
{
closesocket(m_server_socket);
m_server_socket = INVALID_SOCKET;
return false;
}
memset(&m_server_addr, 0, sizeof(m_server_addr));
m_server_addr.sin_family = AF_INET;
m_server_addr.sin_addr.s_addr = htonl(INADDR_ANY);

31
src/Cafe/OS/libs/coreinit/coreinit_Thread.cpp
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@ -5,6 +5,7 @@
#include "Cafe/OS/libs/coreinit/coreinit_Time.h"
#include "Cafe/OS/libs/coreinit/coreinit_Alarm.h"
#include "Cafe/OS/libs/snd_core/ax.h"
#include "Cafe/HW/Espresso/Debugger/GDBStub.h"
#include "Cafe/HW/Espresso/Interpreter/PPCInterpreterInternal.h"
#include "Cafe/HW/Espresso/Recompiler/PPCRecompiler.h"
@ -1153,6 +1154,18 @@ namespace coreinit
}
}
#if BOOST_OS_LINUX
#include <unistd.h>
#include <sys/prctl.h>
std::vector<pid_t> g_schedulerThreadIds;
std::vector<pid_t>& OSGetSchedulerThreadIds()
{
return g_schedulerThreadIds;
}
#endif
void OSSchedulerCoreEmulationThread(void* _assignedCoreIndex)
{
SetThreadName(fmt::format("OSSchedulerThread[core={}]", (uintptr_t)_assignedCoreIndex).c_str());
@ -1160,8 +1173,21 @@ namespace coreinit
#if defined(ARCH_X86_64)
_mm_setcsr(_mm_getcsr() | 0x8000); // flush denormals to zero
#endif
#if BOOST_OS_LINUX
if (g_gdbstub)
{
// need to allow the GDBStub to attach to our thread
prctl(PR_SET_DUMPABLE, (unsigned long)1);
prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY);
}
pid_t tid = gettid();
g_schedulerThreadIds.emplace_back(tid);
#endif
t_schedulerFiber = Fiber::PrepareCurrentThread();
// create scheduler idle fiber and switch to it
g_idleLoopFiber[t_assignedCoreIndex] = new Fiber(__OSThreadCoreIdle, nullptr, nullptr);
cemu_assert_debug(PPCInterpreter_getCurrentInstance() == nullptr);
@ -1211,6 +1237,9 @@ namespace coreinit
threadItr.join();
sSchedulerThreads.clear();
g_schedulerThreadHandles.clear();
#if BOOST_OS_LINUX
g_schedulerThreadIds.clear();
#endif
// clean up all fibers
for (auto& it : g_idleLoopFiber)
{

13
src/Common/ExceptionHandler/ExceptionHandler_posix.cpp
View File

@ -6,6 +6,9 @@
#include "util/helpers/StringHelpers.h"
#include "ExceptionHandler.h"
#include "Cafe/HW/Espresso/Debugger/GDBStub.h"
#include "Cafe/HW/Espresso/Debugger/GDBBreakpoints.h"
#if BOOST_OS_LINUX
#include "ELFSymbolTable.h"
#endif
@ -61,6 +64,16 @@ void DemangleAndPrintBacktrace(char** backtrace, size_t size)
// handle signals that would dump core, print stacktrace and then dump depending on config
void handlerDumpingSignal(int sig, siginfo_t *info, void *context)
{
#if defined(ARCH_X86_64) && BOOST_OS_LINUX
// Check for hardware breakpoints
if (info->si_signo == SIGTRAP && info->si_code == TRAP_HWBKPT)
{
uint64 dr6 = _ReadDR6();
g_gdbstub->HandleAccessException(dr6);
return;
}
#endif
if(!CrashLog_Create())
return; // give up if crashlog was already created