Merge pull request #11399 from JosJuice/jit-one-stack

Jit: Don't use a second stack

Source/Core/Common/Thread.cpp

@@ -7,6 +7,7 @@
 #include <Windows.h>
 #include <processthreadsapi.h>
 #else
+#include <pthread.h>
 #include <unistd.h>
 #endif
 
@@ -185,6 +186,41 @@ void SetCurrentThreadName(const char* name)
 #endif
 }
 
+std::tuple<void*, size_t> GetCurrentThreadStack()
+{
+  void* stack_addr;
+  size_t stack_size;
+
+  pthread_t self = pthread_self();
+
+#ifdef __APPLE__
+  stack_size = pthread_get_stacksize_np(self);
+  stack_addr = reinterpret_cast<u8*>(pthread_get_stackaddr_np(self)) - stack_size;
+#elif defined __OpenBSD__
+  stack_t stack;
+  pthread_stackseg_np(self, &stack);
+
+  stack_addr = reinterpret_cast<u8*>(stack->ss_sp) - stack->ss_size;
+  stack_size = stack->ss_size;
+#else
+  pthread_attr_t attr;
+
+#ifdef __FreeBSD__
+  pthread_attr_init(&attr);
+  pthread_attr_get_np(self, &attr);
+#else
+  // Linux and NetBSD
+  pthread_getattr_np(self, &attr);
+#endif
+
+  pthread_attr_getstack(&attr, &stack_addr, &stack_size);
+
+  pthread_attr_destroy(&attr);
+#endif
+
+  return std::make_tuple(stack_addr, stack_size);
+}
+
 #endif
 
 }  // namespace Common

Source/Core/Common/Thread.h

@@ -5,6 +5,10 @@
 
 #include <thread>
 
+#ifndef _WIN32
+#include <tuple>
+#endif
+
 // Don't include Common.h here as it will break LogManager
 #include "Common/CommonTypes.h"
 
@@ -35,4 +39,9 @@ inline void YieldCPU()
 
 void SetCurrentThreadName(const char* name);
 
+#ifndef _WIN32
+// Returns the lowest address of the stack and the size of the stack
+std::tuple<void*, size_t> GetCurrentThreadStack();
+#endif
+
 }  // namespace Common