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Code Issues Releases Wiki Activity

Exception handling fix

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This commit is contained in:
Nekotekina 2015-12-16 17:20:46 +03:00
parent d68c748976
commit 56ba5a765b
2 changed files with 83 additions and 39 deletions
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1
README.md
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@ -44,6 +44,7 @@ Open the *.SLN* file, and press *Build* > *Clean Solution*, then *Build Solution
If you want to build with LLVM, then LLVM 3.6.2 is required.
`cd rpcs3 && cmake CMakeLists.txt && make && cd ../` then run with `cd bin && ./rpcs3`.
If you are on OSX and want to build with llvm don't forget to add `-DLLVM_DIR=/usr/local/opt/llvm36/lib/llvm-3.6/share/llvm/cmake` (or wherever llvm brew was installed) to cmake invocation.
When using GDB, configure it to ignore SIGSEGV signal (`handle SIGSEGV nostop noprint`).
### Support
* [Donate by PayPal](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=MPJ3S9XQXCE3G)

121
Utilities/Thread.cpp
View File

@ -517,6 +517,9 @@ typedef CONTEXT x64_context;
#define XMMREG(context, reg) (reinterpret_cast<v128*>(&(&(context)->Xmm0)[reg]))
#define EFLAGS(context) ((context)->EFlags)
#define ARG1(context) RCX(context)
#define ARG2(context) RDX(context)
#else
typedef ucontext_t x64_context;
@ -569,11 +572,15 @@ static const decltype(REG_RAX) reg_table[] =
#endif // __APPLE__
#define ARG1(context) RDI(context)
#define ARG2(context) RSI(context)
#endif
#define RAX(c) (*X64REG((c), 0))
#define RCX(c) (*X64REG((c), 1))
#define RDX(c) (*X64REG((c), 2))
#define RSP(c) (*X64REG((c), 4))
#define RSI(c) (*X64REG((c), 6))
#define RDI(c) (*X64REG((c), 7))
#define RIP(c) (*X64REG((c), 16))
@ -1114,31 +1121,32 @@ bool handle_access_violation(u32 addr, bool is_writing, x64_context* context)
// TODO: allow recovering from a page fault as a feature of PS3 virtual memory
}
#ifdef _WIN32
void _se_translator(unsigned int u, EXCEPTION_POINTERS* pExp)
// Throw virtual memory access violation exception
[[noreturn]] void throw_access_violation(const char* cause, u32 address) // Don't change function definition
{
const u64 addr64 = (u64)pExp->ExceptionRecord->ExceptionInformation[1] - (u64)vm::base(0);
const bool is_writing = pExp->ExceptionRecord->ExceptionInformation[0] != 0;
if (u == EXCEPTION_ACCESS_VIOLATION)
{
if ((u32)addr64 == addr64)
{
throw EXCEPTION("Access violation %s location 0x%llx", is_writing ? "writing" : "reading", addr64);
}
std::printf("Access violation %s location %p at %p\n", is_writing ? "writing" : "reading", (void*)pExp->ExceptionRecord->ExceptionInformation[1], pExp->ExceptionRecord->ExceptionAddress);
std::abort();
}
throw EXCEPTION("Access violation %s location 0x%08x", cause, address);
}
const PVOID exception_handler = (atexit([]{ RemoveVectoredExceptionHandler(exception_handler); }), AddVectoredExceptionHandler(1, [](PEXCEPTION_POINTERS pExp) -> LONG
// Modify context in order to convert hardware exception to C++ exception
void prepare_throw_access_violation(x64_context* context, const char* cause, u32 address)
{
const u64 addr64 = (u64)pExp->ExceptionRecord->ExceptionInformation[1] - (u64)vm::base(0);
// Set throw_access_violation() call args (old register values are lost)
ARG1(context) = (u64)cause;
ARG2(context) = address;
// Push the exception address as a "return" address (throw_access_violation() shall not return)
*--(u64*&)(RSP(context)) = RIP(context);
RIP(context) = (u64)std::addressof(throw_access_violation);
}
#ifdef _WIN32
const auto g_exception_handler = AddVectoredExceptionHandler(1, [](PEXCEPTION_POINTERS pExp) -> LONG
{
const u64 addr64 = pExp->ExceptionRecord->ExceptionInformation[1] - (u64)vm::base(0);
const bool is_writing = pExp->ExceptionRecord->ExceptionInformation[0] != 0;
if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && (u32)addr64 == addr64 && thread_ctrl::get_current() && handle_access_violation((u32)addr64, is_writing, pExp->ContextRecord))
if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && addr64 < 0x100000000ull && thread_ctrl::get_current() && handle_access_violation((u32)addr64, is_writing, pExp->ContextRecord))
{
return EXCEPTION_CONTINUE_EXECUTION;
}
@ -1146,12 +1154,41 @@ const PVOID exception_handler = (atexit([]{ RemoveVectoredExceptionHandler(excep
{
return EXCEPTION_CONTINUE_SEARCH;
}
}));
});
const auto exception_filter = SetUnhandledExceptionFilter([](PEXCEPTION_POINTERS pExp) -> LONG
const auto g_exception_filter = SetUnhandledExceptionFilter([](PEXCEPTION_POINTERS pExp) -> LONG
{
_se_translator(pExp->ExceptionRecord->ExceptionCode, pExp);
std::string msg;
if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
{
const u64 addr64 = pExp->ExceptionRecord->ExceptionInformation[1] - (u64)vm::base(0);
const auto cause = pExp->ExceptionRecord->ExceptionInformation[0] != 0 ? "writing" : "reading";
if (addr64 < 0x100000000ull)
{
// Setup throw_access_violation() call on the context
prepare_throw_access_violation(pExp->ContextRecord, cause, (u32)addr64);
return EXCEPTION_CONTINUE_EXECUTION;
}
msg += fmt::format("Access violation %s location %p at %p.\n", cause, pExp->ExceptionRecord->ExceptionInformation[1], pExp->ExceptionRecord->ExceptionAddress);
}
else
{
msg += fmt::format("Exception address: %p.\n", pExp->ExceptionRecord->ExceptionAddress);
for (DWORD i = 0; i < pExp->ExceptionRecord->NumberParameters; i++)
{
msg += fmt::format("ExceptionInformation[0x%x]: %p.\n", i, pExp->ExceptionRecord->ExceptionInformation[i]);
}
}
msg += fmt::format("Image base: %p.\n\n", GetModuleHandle(NULL));
msg += "Report this error to the developers. Press (Ctrl+C) to copy this message.";
// Report fatal error
MessageBoxA(0, msg.c_str(), fmt::format("Win32 Exception 0x%08X", pExp->ExceptionRecord->ExceptionCode).c_str(), MB_ICONERROR);
return EXCEPTION_CONTINUE_SEARCH;
});
@ -1159,31 +1196,35 @@ const auto exception_filter = SetUnhandledExceptionFilter([](PEXCEPTION_POINTERS
void signal_handler(int sig, siginfo_t* info, void* uct)
{
const u64 addr64 = (u64)info->si_addr - (u64)vm::base(0);
x64_context* context = (ucontext_t*)uct;
#ifdef __APPLE__
const bool is_writing = ((ucontext_t*)uct)->uc_mcontext->__es.__err & 0x2;
const bool is_writing = context->uc_mcontext->__es.__err & 0x2;
#else
const bool is_writing = ((ucontext_t*)uct)->uc_mcontext.gregs[REG_ERR] & 0x2;
const bool is_writing = context->uc_mcontext.gregs[REG_ERR] & 0x2;
#endif
if ((u32)addr64 == addr64 && thread_ctrl::get_current())
const u64 addr64 = (u64)info->si_addr - (u64)vm::base(0);
const auto cause = is_writing ? "writing" : "reading";
if (addr64 < 0x100000000ull && thread_ctrl::get_current())
{
if (handle_access_violation((u32)addr64, is_writing, (ucontext_t*)uct))
// Try to process access violation
if (!handle_access_violation((u32)addr64, is_writing, context))
{
return; // proceed execution
// Setup throw_access_violation() call on the context
prepare_throw_access_violation(context, cause, (u32)addr64);
}
// TODO: this may be wrong
throw EXCEPTION("Access violation %s location 0x%llx", is_writing ? "writing" : "reading", addr64);
}
// else some fatal error
std::printf("Access violation %s location %p at %p\n", is_writing ? "writing" : "reading", info->si_addr, RIP((ucontext_t*)uct));
std::abort();
else
{
// Report fatal error (TODO)
std::printf("Access violation %s location %p at %p.\n", cause, info->si_addr, RIP(context));
std::abort();
}
}
const int sigaction_result = []() -> int
int setup_signal_handler()
{
struct sigaction sa;
@ -1191,7 +1232,9 @@ const int sigaction_result = []() -> int
sigemptyset(&sa.sa_mask);
sa.sa_sigaction = signal_handler;
return sigaction(SIGSEGV, &sa, NULL);
}();
}
const int g_sigaction_result = setup_signal_handler();
#endif
@ -1205,9 +1248,9 @@ void thread_ctrl::initialize()
SetCurrentThreadDebugName(g_tls_this_thread->m_name().c_str());
#ifdef _WIN32
if (!exception_handler || !exception_filter)
if (!g_exception_handler || !g_exception_filter)
#else
if (sigaction_result == -1)
if (g_sigaction_result == -1)
#endif
{
std::printf("Exceptions handlers are not set correctly.\n");