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exception_handler_posix: Just disable fastmem if initialization fails

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This commit is contained in:
MerryMage 2020-06-10 22:30:02 +01:00
parent 55bddc767f
commit c4cf0b3e47
1 changed files with 20 additions and 5 deletions
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25
src/backend/x64/exception_handler_posix.cpp
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@ -39,11 +39,15 @@ public:
void AddCodeBlock(CodeBlockInfo info);
void RemoveCodeBlock(u64 rip);
bool SupportsFastmem() const { return supports_fast_mem; }
private:
auto FindCodeBlockInfo(u64 rip) {
return std::find_if(code_block_infos.begin(), code_block_infos.end(), [&](const auto& x) { return x.code_begin <= rip && x.code_end > rip; });
}
bool supports_fast_mem = true;
std::vector<CodeBlockInfo> code_block_infos;
std::mutex code_block_infos_mutex;
@ -62,17 +66,28 @@ SigHandler::SigHandler() {
signal_stack.ss_sp = std::malloc(signal_stack_size);
signal_stack.ss_size = signal_stack_size;
signal_stack.ss_flags = 0;
const int ret = sigaltstack(&signal_stack, nullptr);
ASSERT_MSG(ret == 0, "dynarmic: POSIX SigHandler: init failure at sigaltstack");
if (sigaltstack(&signal_stack, nullptr) != 0) {
fmt::print(stderr, "dynarmic: POSIX SigHandler: init failure at sigaltstack\n");
supports_fast_mem = false;
return;
}
struct sigaction sa;
sa.sa_handler = nullptr;
sa.sa_sigaction = &SigHandler::SigAction;
sa.sa_flags = SA_SIGINFO | SA_ONSTACK | SA_RESTART;
sigemptyset(&sa.sa_mask);
sigaction(SIGSEGV, &sa, &old_sa_segv);
if (sigaction(SIGSEGV, &sa, &old_sa_segv) != 0) {
fmt::print(stderr, "dynarmic: POSIX SigHandler: could not set SIGSEGV handler\n");
supports_fast_mem = false;
return;
}
#ifdef __APPLE__
sigaction(SIGBUS, &sa, &old_sa_bus);
if (sigaction(SIGBUS, &sa, &old_sa_bus) != 0) {
fmt::print(stderr, "dynarmic: POSIX SigHandler: could not set SIGBUS handler\n");
supports_fast_mem = false;
return;
}
#endif
}
@ -173,7 +188,7 @@ void ExceptionHandler::Register(BlockOfCode& code) {
}
bool ExceptionHandler::SupportsFastmem() const noexcept {
return static_cast<bool>(impl);
return static_cast<bool>(impl) && sig_handler.SupportsFastmem();
}
void ExceptionHandler::SetFastmemCallback(std::function<FakeCall(u64)> cb) {