[rpcsx-os] Attempt to fix crash for gcc-12

rpcsx-os/main.cpp

@@ -84,6 +84,22 @@ handle_signal(int sig, siginfo_t *info, void *ucontext) {
 }
 
 static void setupSigHandlers() {
+  stack_t ss;
+
+  ss.ss_sp = malloc(SIGSTKSZ);
+  if (ss.ss_sp == NULL) {
+    perror("malloc");
+    exit(EXIT_FAILURE);
+  }
+
+  ss.ss_size = SIGSTKSZ;
+  ss.ss_flags = 0;
+
+  if (sigaltstack(&ss, NULL) == -1) {
+    perror("sigaltstack");
+    exit(EXIT_FAILURE);
+  }
+
   struct sigaction act {};
   act.sa_sigaction = handle_signal;
   act.sa_flags = SA_SIGINFO | SA_ONSTACK;

rpcsx-os/ops.cpp

@@ -10,6 +10,7 @@
 #include "vfs.hpp"
 #include "vm.hpp"
 #include <chrono>
+#include <csignal>
 #include <cstdio>
 #include <filesystem>
 #include <map>
@@ -470,6 +471,22 @@ SysResult thr_new(orbis::Thread *thread, orbis::ptr<thr_param> param,
   std::printf("Starting child thread %lu\n", (long)(proc->pid + baseId));
 
   std::thread{[=, childThread = Ref<Thread>(childThread)] {
+    stack_t ss;
+
+    ss.ss_sp = malloc(SIGSTKSZ);
+    if (ss.ss_sp == NULL) {
+      perror("malloc");
+      exit(EXIT_FAILURE);
+    }
+
+    ss.ss_size = SIGSTKSZ;
+    ss.ss_flags = 0;
+
+    if (sigaltstack(&ss, NULL) == -1) {
+      perror("sigaltstack");
+      exit(EXIT_FAILURE);
+    }
+
     static_cast<void>(
         uwrite(_param.child_tid, slong(childThread->tid))); // TODO: verify
     auto context = new ucontext_t{};

rpcsx-os/thread.cpp

@@ -43,22 +43,6 @@ void rx::thread::deinitialize() {}
 void rx::thread::invoke(orbis::Thread *thread) {
   g_current = thread;
 
-  stack_t ss;
-
-  ss.ss_sp = malloc(SIGSTKSZ);
-  if (ss.ss_sp == NULL) {
-    perror("malloc");
-    exit(EXIT_FAILURE);
-  }
-
-  ss.ss_size = SIGSTKSZ;
-  ss.ss_flags = 0;
-
-  if (sigaltstack(&ss, NULL) == -1) {
-    perror("sigaltstack");
-    exit(EXIT_FAILURE);
-  }
-
   sigset_t unblockSigs{};
   sigset_t oldSigmask{};
   sigaddset(&unblockSigs, SIGSYS);