8026495: JVM Crashes when started with -XX:+DTraceMethodProbes on Solaris x86_64

Summary: Fix wrong calling convention in LIR_Assembler::emit_unwind_handler(), T_METADATA support in calling convention generator, C1 register allocator
Reviewed-by: twisti, jrose

src/cpu/sparc/vm/c1_FrameMap_sparc.cpp

@@ -53,6 +53,8 @@ LIR_Opr FrameMap::map_to_opr(BasicType type, VMRegPair* reg, bool outgoing) {
       opr = as_long_opr(reg);
     } else if (type == T_OBJECT || type == T_ARRAY) {
       opr = as_oop_opr(reg);
+    } else if (type == T_METADATA) {
+      opr = as_metadata_opr(reg);
     } else {
       opr = as_opr(reg);
     }

src/cpu/x86/vm/c1_FrameMap_x86.cpp

@@ -52,6 +52,8 @@ LIR_Opr FrameMap::map_to_opr(BasicType type, VMRegPair* reg, bool) {
 #endif // _LP64
     } else if (type == T_OBJECT || type == T_ARRAY) {
       opr = as_oop_opr(reg);
+    } else if (type == T_METADATA) {
+      opr = as_metadata_opr(reg);
     } else {
       opr = as_opr(reg);
     }

src/cpu/x86/vm/c1_LIRAssembler_x86.cpp

@@ -432,15 +432,16 @@ int LIR_Assembler::emit_unwind_handler() {
   int offset = code_offset();
 
   // Fetch the exception from TLS and clear out exception related thread state
-  __ get_thread(rsi);
-  __ movptr(rax, Address(rsi, JavaThread::exception_oop_offset()));
-  __ movptr(Address(rsi, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD);
-  __ movptr(Address(rsi, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD);
+  Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
+  NOT_LP64(__ get_thread(rsi));
+  __ movptr(rax, Address(thread, JavaThread::exception_oop_offset()));
+  __ movptr(Address(thread, JavaThread::exception_oop_offset()), (intptr_t)NULL_WORD);
+  __ movptr(Address(thread, JavaThread::exception_pc_offset()), (intptr_t)NULL_WORD);
 
   __ bind(_unwind_handler_entry);
   __ verify_not_null_oop(rax);
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
-    __ mov(rsi, rax);  // Preserve the exception
+    __ mov(rbx, rax);  // Preserve the exception (rbx is always callee-saved)
   }
 
   // Preform needed unlocking
@@ -448,19 +449,24 @@ int LIR_Assembler::emit_unwind_handler() {
   if (method()->is_synchronized()) {
     monitor_address(0, FrameMap::rax_opr);
     stub = new MonitorExitStub(FrameMap::rax_opr, true, 0);
-    __ unlock_object(rdi, rbx, rax, *stub->entry());
+    __ unlock_object(rdi, rsi, rax, *stub->entry());
     __ bind(*stub->continuation());
   }
 
   if (compilation()->env()->dtrace_method_probes()) {
+#ifdef _LP64
+    __ mov(rdi, r15_thread);
+    __ mov_metadata(rsi, method()->constant_encoding());
+#else
     __ get_thread(rax);
     __ movptr(Address(rsp, 0), rax);
     __ mov_metadata(Address(rsp, sizeof(void*)), method()->constant_encoding());
+#endif
     __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit)));
   }
 
   if (method()->is_synchronized() || compilation()->env()->dtrace_method_probes()) {
-    __ mov(rax, rsi);  // Restore the exception
+    __ mov(rax, rbx);  // Restore the exception
   }
 
   // remove the activation and dispatch to the unwind handler

src/share/vm/c1/c1_LIR.cpp

@@ -183,10 +183,10 @@ char LIR_OprDesc::type_char(BasicType t) {
     case T_LONG:
     case T_OBJECT:
     case T_ADDRESS:
-    case T_METADATA:
     case T_VOID:
       return ::type2char(t);
-
+    case T_METADATA:
+      return 'M';
     case T_ILLEGAL:
       return '?';
 

src/share/vm/c1/c1_LIRGenerator.cpp

@@ -1175,7 +1175,7 @@ void LIRGenerator::do_Return(Return* x) {
   if (compilation()->env()->dtrace_method_probes()) {
     BasicTypeList signature;
     signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT));    // thread
-    signature.append(T_OBJECT); // Method*
+    signature.append(T_METADATA); // Method*
     LIR_OprList* args = new LIR_OprList();
     args->append(getThreadPointer());
     LIR_Opr meth = new_register(T_METADATA);
@@ -2720,7 +2720,7 @@ void LIRGenerator::do_Base(Base* x) {
   if (compilation()->env()->dtrace_method_probes()) {
     BasicTypeList signature;
     signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT));    // thread
-    signature.append(T_OBJECT); // Method*
+    signature.append(T_METADATA); // Method*
     LIR_OprList* args = new LIR_OprList();
     args->append(getThreadPointer());
     LIR_Opr meth = new_register(T_METADATA);
@@ -3331,7 +3331,7 @@ void LIRGenerator::do_RuntimeCall(RuntimeCall* x) {
   BasicTypeList* signature = new BasicTypeList(x->number_of_arguments());
 
   if (x->pass_thread()) {
-    signature->append(T_ADDRESS);
+    signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT));    // thread
     args->append(getThreadPointer());
   }
 

src/share/vm/c1/c1_LinearScan.cpp

@@ -75,9 +75,9 @@
 
 // Map BasicType to spill size in 32-bit words, matching VMReg's notion of words
 #ifdef _LP64
-static int type2spill_size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 2, 2, 0, 1, -1};
+static int type2spill_size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 2, 2, 0, 2,  1, 2, 1, -1};
 #else
-static int type2spill_size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, -1};
+static int type2spill_size[T_CONFLICT+1]={ -1, 0, 0, 0, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 0, 1, -1, 1, 1, -1};
 #endif