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bool notify_jvmdi) {
// Note: Registers r3 xmm0 may be in use for the
// result check if synchronized method
Label unlocked, unlock, no_unlock;
+ #ifdef ASSERT
+ Label not_preempted;
+ ldr(rscratch1, Address(rthread, JavaThread::preempt_alternate_return_offset()));
+ cbz(rscratch1, not_preempted);
+ stop("remove_activation: should not have alternate return address set");
+ bind(not_preempted);
+ #endif /* ASSERT */
+
// get the value of _do_not_unlock_if_synchronized into r3
const Address do_not_unlock_if_synchronized(rthread,
in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
ldrb(r3, do_not_unlock_if_synchronized);
strb(zr, do_not_unlock_if_synchronized); // reset the flag
}
void InterpreterMacroAssembler::call_VM_base(Register oop_result,
Register java_thread,
Register last_java_sp,
+ Label* return_pc,
address entry_point,
int number_of_arguments,
bool check_exceptions) {
// interpreter specific
//
bind(L);
}
#endif /* ASSERT */
// super call
MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
- entry_point, number_of_arguments,
- check_exceptions);
+ return_pc, entry_point,
+ number_of_arguments, check_exceptions);
// interpreter specific
restore_bcp();
restore_locals();
}
- void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
- address entry_point,
- Register arg_1) {
- assert(arg_1 == c_rarg1, "");
+ void InterpreterMacroAssembler::call_VM_preemptable_helper(Register oop_result,
+ address entry_point,
+ int number_of_arguments,
+ bool check_exceptions) {
+ assert(InterpreterRuntime::is_preemptable_call(entry_point), "VM call not preemptable, should use call_VM()");
Label resume_pc, not_preempted;
#ifdef ASSERT
{
- Label L;
+ Label L1, L2;
ldr(rscratch1, Address(rthread, JavaThread::preempt_alternate_return_offset()));
- cbz(rscratch1, L);
- stop("Should not have alternate return address set");
- bind(L);
+ cbz(rscratch1, L1);
+ stop("call_VM_preemptable_helper: Should not have alternate return address set");
+ bind(L1);
+ // We check this counter in patch_return_pc_with_preempt_stub() during freeze.
+ incrementw(Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
+ ldrw(rscratch1, Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
+ cmpw(rscratch1, 0);
+ br(Assembler::GT, L2);
+ stop("call_VM_preemptable_helper: should be > 0");
+ bind(L2);
}
#endif /* ASSERT */
// Force freeze slow path.
push_cont_fastpath();
// Make VM call. In case of preemption set last_pc to the one we want to resume to.
- adr(rscratch1, resume_pc);
- str(rscratch1, Address(rthread, JavaThread::last_Java_pc_offset()));
- call_VM_base(oop_result, noreg, noreg, entry_point, 1, false /*check_exceptions*/);
+ // Note: call_VM_base will use resume_pc label to set last_Java_pc.
+ call_VM_base(noreg, noreg, noreg, &resume_pc, entry_point, number_of_arguments, false /*check_exceptions*/);
pop_cont_fastpath();
+ #ifdef ASSERT
+ {
+ Label L;
+ decrementw(Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
+ ldrw(rscratch1, Address(rthread, JavaThread::interp_at_preemptable_vmcall_cnt_offset()));
+ cmpw(rscratch1, 0);
+ br(Assembler::GE, L);
+ stop("call_VM_preemptable_helper: should be >= 0");
+ bind(L);
+ }
+ #endif /* ASSERT */
+
// Check if preempted.
ldr(rscratch1, Address(rthread, JavaThread::preempt_alternate_return_offset()));
cbz(rscratch1, not_preempted);
str(zr, Address(rthread, JavaThread::preempt_alternate_return_offset()));
br(rscratch1);
// In case of preemption, this is where we will resume once we finally acquire the monitor.
bind(resume_pc);
restore_after_resume(false /* is_native */);
bind(not_preempted);
+ if (check_exceptions) {
+ // check for pending exceptions
+ ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset())));
+ Label ok;
+ cbz(rscratch1, ok);
+ lea(rscratch1, RuntimeAddress(StubRoutines::forward_exception_entry()));
+ br(rscratch1);
+ bind(ok);
+ }
+
+ // get oop result if there is one and reset the value in the thread
+ if (oop_result->is_valid()) {
+ get_vm_result_oop(oop_result, rthread);
+ }
+ }
+
+ static void pass_arg1(MacroAssembler* masm, Register arg) {
+ if (c_rarg1 != arg ) {
+ masm->mov(c_rarg1, arg);
+ }
+ }
+
+ static void pass_arg2(MacroAssembler* masm, Register arg) {
+ if (c_rarg2 != arg ) {
+ masm->mov(c_rarg2, arg);
+ }
+ }
+
+ void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
+ address entry_point,
+ Register arg_1,
+ bool check_exceptions) {
+ pass_arg1(this, arg_1);
+ call_VM_preemptable_helper(oop_result, entry_point, 1, check_exceptions);
+ }
+
+ void InterpreterMacroAssembler::call_VM_preemptable(Register oop_result,
+ address entry_point,
+ Register arg_1,
+ Register arg_2,
+ bool check_exceptions) {
+ LP64_ONLY(assert_different_registers(arg_1, c_rarg2));
+ pass_arg2(this, arg_2);
+ pass_arg1(this, arg_1);
+ call_VM_preemptable_helper(oop_result, entry_point, 2, check_exceptions);
}
void InterpreterMacroAssembler::restore_after_resume(bool is_native) {
lea(rscratch1, ExternalAddress(Interpreter::cont_resume_interpreter_adapter()));
blr(rscratch1);
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