src/cpu/x86/vm/x86_32.ad

@@ -670,21 +670,20 @@
 }
 #endif
 
 void MachEpilogNode::emit(CodeBuffer &cbuf, PhaseRegAlloc *ra_) const {
   Compile *C = ra_->C;
+  MacroAssembler _masm(&cbuf);
 
   if (C->max_vector_size() > 16) {
     // Clear upper bits of YMM registers when current compiled code uses
     // wide vectors to avoid AVX <-> SSE transition penalty during call.
-    MacroAssembler masm(&cbuf);
-    masm.vzeroupper();
+    _masm.vzeroupper();
   }
   // If method set FPU control word, restore to standard control word
   if (C->in_24_bit_fp_mode()) {
-    MacroAssembler masm(&cbuf);
-    masm.fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
+    _masm.fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
   }
 
   int framesize = C->frame_size_in_bytes();
   assert((framesize & (StackAlignmentInBytes-1)) == 0, "frame size not aligned");
   // Remove two words for return addr and rbp,

@@ -702,10 +701,14 @@
     emit_d8(cbuf, framesize);
   }
 
   emit_opcode(cbuf, 0x58 | EBP_enc);
 
+  if (StackReservedPages > 0 && C->has_reserved_stack_access()) {
+    __ reserved_stack_check();
+  }
+
   if (do_polling() && C->is_method_compilation()) {
     cbuf.relocate(cbuf.insts_end(), relocInfo::poll_return_type, 0);
     emit_opcode(cbuf,0x85);
     emit_rm(cbuf, 0x0, EAX_enc, 0x5); // EAX
     emit_d32(cbuf, (intptr_t)os::get_polling_page());

@@ -729,10 +732,11 @@
   if (framesize >= 128) {
     size += 6;
   } else {
     size += framesize ? 3 : 0;
   }
+  size += 64; // added to support ReservedStackAccess
   return size;
 }
 
 int MachEpilogNode::reloc() const {
   return 0; // a large enough number