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lizzie 2026-04-01 19:03:39 +00:00 • committed by crueter
parent 75c5393ab3
commit 6a5c18b55e
1 changed files with 4 additions and 6 deletions
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10
src/dynarmic/src/dynarmic/backend/exception_handler_posix.cpp
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@ -40,16 +40,13 @@ struct CodeBlockInfo {
}; };
class SigHandler { class SigHandler {
static constexpr std::size_t signal_stack_size = std::max<std::size_t>(SIGSTKSZ, 2 * 1024 * 1024);
auto FindCodeBlockInfo(u64 offset) noexcept { auto FindCodeBlockInfo(u64 offset) noexcept {
return std::find_if(code_block_infos.begin(), code_block_infos.end(), [&](auto const& e) { return std::find_if(code_block_infos.begin(), code_block_infos.end(), [&](auto const& e) {
return e.first <= offset && e.first + e.second.size > offset; return e.first <= offset && e.first + e.second.size > offset;
}); });
} }
static void SigAction(int sig, siginfo_t* info, void* raw_context); static void SigAction(int sig, siginfo_t* info, void* raw_context);
std::vector<u8> signal_stack_memory;
alignas(16) std::array<u8, signal_stack_size> signal_stack_memory;
ankerl::unordered_dense::map<u64, CodeBlockInfo> code_block_infos; ankerl::unordered_dense::map<u64, CodeBlockInfo> code_block_infos;
std::shared_mutex code_block_infos_mutex; std::shared_mutex code_block_infos_mutex;
struct sigaction old_sa_segv; struct sigaction old_sa_segv;
@ -57,9 +54,10 @@ class SigHandler {
bool supports_fast_mem = true; bool supports_fast_mem = true;
public: public:
SigHandler() noexcept { SigHandler() noexcept {
signal_stack_memory.resize(std::max<std::size_t>(SIGSTKSZ, 2 * 1024 * 1024), 0);
stack_t signal_stack{}; stack_t signal_stack{};
signal_stack.ss_sp = std::addressof(signal_stack_memory); signal_stack.ss_sp = signal_stack_memory.data();
signal_stack.ss_size = signal_stack_size; signal_stack.ss_size = signal_stack_memory.size();
signal_stack.ss_flags = 0; signal_stack.ss_flags = 0;
if (sigaltstack(&signal_stack, nullptr) != 0) { if (sigaltstack(&signal_stack, nullptr) != 0) {
fmt::print(stderr, "dynarmic: POSIX SigHandler: init failure at sigaltstack\n"); fmt::print(stderr, "dynarmic: POSIX SigHandler: init failure at sigaltstack\n");