--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/cpu/x86/vm/templateInterpreterGenerator_x86.cpp Sat Dec 05 10:40:22 2015 -0500
@@ -0,0 +1,1874 @@
+/*
+ * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "asm/macroAssembler.hpp"
+#include "interpreter/bytecodeHistogram.hpp"
+#include "interpreter/interpreter.hpp"
+#include "interpreter/interpreterGenerator.hpp"
+#include "interpreter/interpreterRuntime.hpp"
+#include "interpreter/interp_masm.hpp"
+#include "interpreter/templateTable.hpp"
+#include "oops/arrayOop.hpp"
+#include "oops/methodData.hpp"
+#include "oops/method.hpp"
+#include "oops/oop.inline.hpp"
+#include "prims/jvmtiExport.hpp"
+#include "prims/jvmtiThreadState.hpp"
+#include "runtime/arguments.hpp"
+#include "runtime/deoptimization.hpp"
+#include "runtime/frame.inline.hpp"
+#include "runtime/sharedRuntime.hpp"
+#include "runtime/stubRoutines.hpp"
+#include "runtime/synchronizer.hpp"
+#include "runtime/timer.hpp"
+#include "runtime/vframeArray.hpp"
+#include "utilities/debug.hpp"
+#include "utilities/macros.hpp"
+
+#define __ _masm->
+
+#ifndef CC_INTERP
+
+// Global Register Names
+static const Register rbcp = LP64_ONLY(r13) NOT_LP64(rsi);
+static const Register rlocals = LP64_ONLY(r14) NOT_LP64(rdi);
+
+const int method_offset = frame::interpreter_frame_method_offset * wordSize;
+const int bcp_offset = frame::interpreter_frame_bcp_offset * wordSize;
+const int locals_offset = frame::interpreter_frame_locals_offset * wordSize;
+
+//-----------------------------------------------------------------------------
+
+address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
+ address entry = __ pc();
+
+#ifdef ASSERT
+ {
+ Label L;
+ __ lea(rax, Address(rbp,
+ frame::interpreter_frame_monitor_block_top_offset *
+ wordSize));
+ __ cmpptr(rax, rsp); // rax = maximal rsp for current rbp (stack
+ // grows negative)
+ __ jcc(Assembler::aboveEqual, L); // check if frame is complete
+ __ stop ("interpreter frame not set up");
+ __ bind(L);
+ }
+#endif // ASSERT
+ // Restore bcp under the assumption that the current frame is still
+ // interpreted
+ __ restore_bcp();
+
+ // expression stack must be empty before entering the VM if an
+ // exception happened
+ __ empty_expression_stack();
+ // throw exception
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::throw_StackOverflowError));
+ return entry;
+}
+
+address TemplateInterpreterGenerator::generate_ArrayIndexOutOfBounds_handler(
+ const char* name) {
+ address entry = __ pc();
+ // expression stack must be empty before entering the VM if an
+ // exception happened
+ __ empty_expression_stack();
+ // setup parameters
+ // ??? convention: expect aberrant index in register ebx
+ Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
+ __ lea(rarg, ExternalAddress((address)name));
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::
+ throw_ArrayIndexOutOfBoundsException),
+ rarg, rbx);
+ return entry;
+}
+
+address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
+ address entry = __ pc();
+
+ // object is at TOS
+ Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
+ __ pop(rarg);
+
+ // expression stack must be empty before entering the VM if an
+ // exception happened
+ __ empty_expression_stack();
+
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::
+ throw_ClassCastException),
+ rarg);
+ return entry;
+}
+
+address TemplateInterpreterGenerator::generate_exception_handler_common(
+ const char* name, const char* message, bool pass_oop) {
+ assert(!pass_oop || message == NULL, "either oop or message but not both");
+ address entry = __ pc();
+
+ Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
+ Register rarg2 = NOT_LP64(rbx) LP64_ONLY(c_rarg2);
+
+ if (pass_oop) {
+ // object is at TOS
+ __ pop(rarg2);
+ }
+ // expression stack must be empty before entering the VM if an
+ // exception happened
+ __ empty_expression_stack();
+ // setup parameters
+ __ lea(rarg, ExternalAddress((address)name));
+ if (pass_oop) {
+ __ call_VM(rax, CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::
+ create_klass_exception),
+ rarg, rarg2);
+ } else {
+ // kind of lame ExternalAddress can't take NULL because
+ // external_word_Relocation will assert.
+ if (message != NULL) {
+ __ lea(rarg2, ExternalAddress((address)message));
+ } else {
+ __ movptr(rarg2, NULL_WORD);
+ }
+ __ call_VM(rax,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
+ rarg, rarg2);
+ }
+ // throw exception
+ __ jump(ExternalAddress(Interpreter::throw_exception_entry()));
+ return entry;
+}
+
+
+address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
+ address entry = __ pc();
+ // NULL last_sp until next java call
+ __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+ __ dispatch_next(state);
+ return entry;
+}
+
+
+address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
+ address entry = __ pc();
+
+#ifndef _LP64
+#ifdef COMPILER2
+ // The FPU stack is clean if UseSSE >= 2 but must be cleaned in other cases
+ if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
+ for (int i = 1; i < 8; i++) {
+ __ ffree(i);
+ }
+ } else if (UseSSE < 2) {
+ __ empty_FPU_stack();
+ }
+#endif // COMPILER2
+ if ((state == ftos && UseSSE < 1) || (state == dtos && UseSSE < 2)) {
+ __ MacroAssembler::verify_FPU(1, "generate_return_entry_for compiled");
+ } else {
+ __ MacroAssembler::verify_FPU(0, "generate_return_entry_for compiled");
+ }
+
+ if (state == ftos) {
+ __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_return_entry_for in interpreter");
+ } else if (state == dtos) {
+ __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_return_entry_for in interpreter");
+ }
+#endif // _LP64
+
+ // Restore stack bottom in case i2c adjusted stack
+ __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
+ // and NULL it as marker that esp is now tos until next java call
+ __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+
+ __ restore_bcp();
+ __ restore_locals();
+
+ if (state == atos) {
+ Register mdp = rbx;
+ Register tmp = rcx;
+ __ profile_return_type(mdp, rax, tmp);
+ }
+
+ const Register cache = rbx;
+ const Register index = rcx;
+ __ get_cache_and_index_at_bcp(cache, index, 1, index_size);
+
+ const Register flags = cache;
+ __ movl(flags, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
+ __ andl(flags, ConstantPoolCacheEntry::parameter_size_mask);
+ __ lea(rsp, Address(rsp, flags, Interpreter::stackElementScale()));
+ __ dispatch_next(state, step);
+
+ return entry;
+}
+
+
+address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state, int step) {
+ address entry = __ pc();
+
+#ifndef _LP64
+ if (state == ftos) {
+ __ MacroAssembler::verify_FPU(UseSSE >= 1 ? 0 : 1, "generate_deopt_entry_for in interpreter");
+ } else if (state == dtos) {
+ __ MacroAssembler::verify_FPU(UseSSE >= 2 ? 0 : 1, "generate_deopt_entry_for in interpreter");
+ }
+#endif // _LP64
+
+ // NULL last_sp until next java call
+ __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+ __ restore_bcp();
+ __ restore_locals();
+ const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
+ NOT_LP64(__ get_thread(thread));
+#if INCLUDE_JVMCI
+ // Check if we need to take lock at entry of synchronized method.
+ if (UseJVMCICompiler) {
+ Label L;
+ __ cmpb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
+ __ jcc(Assembler::zero, L);
+ // Clear flag.
+ __ movb(Address(thread, JavaThread::pending_monitorenter_offset()), 0);
+ // Satisfy calling convention for lock_method().
+ __ get_method(rbx);
+ // Take lock.
+ lock_method();
+ __ bind(L);
+ }
+#endif
+ // handle exceptions
+ {
+ Label L;
+ __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
+ __ jcc(Assembler::zero, L);
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::throw_pending_exception));
+ __ should_not_reach_here();
+ __ bind(L);
+ }
+ __ dispatch_next(state, step);
+ return entry;
+}
+
+address TemplateInterpreterGenerator::generate_result_handler_for(
+ BasicType type) {
+ address entry = __ pc();
+ switch (type) {
+ case T_BOOLEAN: __ c2bool(rax); break;
+#ifndef _LP64
+ case T_CHAR : __ andptr(rax, 0xFFFF); break;
+#else
+ case T_CHAR : __ movzwl(rax, rax); break;
+#endif // _LP64
+ case T_BYTE : __ sign_extend_byte(rax); break;
+ case T_SHORT : __ sign_extend_short(rax); break;
+ case T_INT : /* nothing to do */ break;
+ case T_LONG : /* nothing to do */ break;
+ case T_VOID : /* nothing to do */ break;
+#ifndef _LP64
+ case T_DOUBLE :
+ case T_FLOAT :
+ { const Register t = InterpreterRuntime::SignatureHandlerGenerator::temp();
+ __ pop(t); // remove return address first
+ // Must return a result for interpreter or compiler. In SSE
+ // mode, results are returned in xmm0 and the FPU stack must
+ // be empty.
+ if (type == T_FLOAT && UseSSE >= 1) {
+ // Load ST0
+ __ fld_d(Address(rsp, 0));
+ // Store as float and empty fpu stack
+ __ fstp_s(Address(rsp, 0));
+ // and reload
+ __ movflt(xmm0, Address(rsp, 0));
+ } else if (type == T_DOUBLE && UseSSE >= 2 ) {
+ __ movdbl(xmm0, Address(rsp, 0));
+ } else {
+ // restore ST0
+ __ fld_d(Address(rsp, 0));
+ }
+ // and pop the temp
+ __ addptr(rsp, 2 * wordSize);
+ __ push(t); // restore return address
+ }
+ break;
+#else
+ case T_FLOAT : /* nothing to do */ break;
+ case T_DOUBLE : /* nothing to do */ break;
+#endif // _LP64
+
+ case T_OBJECT :
+ // retrieve result from frame
+ __ movptr(rax, Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize));
+ // and verify it
+ __ verify_oop(rax);
+ break;
+ default : ShouldNotReachHere();
+ }
+ __ ret(0); // return from result handler
+ return entry;
+}
+
+address TemplateInterpreterGenerator::generate_safept_entry_for(
+ TosState state,
+ address runtime_entry) {
+ address entry = __ pc();
+ __ push(state);
+ __ call_VM(noreg, runtime_entry);
+ __ dispatch_via(vtos, Interpreter::_normal_table.table_for(vtos));
+ return entry;
+}
+
+
+
+// Helpers for commoning out cases in the various type of method entries.
+//
+
+
+// increment invocation count & check for overflow
+//
+// Note: checking for negative value instead of overflow
+// so we have a 'sticky' overflow test
+//
+// rbx: method
+// rcx: invocation counter
+//
+void InterpreterGenerator::generate_counter_incr(
+ Label* overflow,
+ Label* profile_method,
+ Label* profile_method_continue) {
+ Label done;
+ // Note: In tiered we increment either counters in Method* or in MDO depending if we're profiling or not.
+ if (TieredCompilation) {
+ int increment = InvocationCounter::count_increment;
+ Label no_mdo;
+ if (ProfileInterpreter) {
+ // Are we profiling?
+ __ movptr(rax, Address(rbx, Method::method_data_offset()));
+ __ testptr(rax, rax);
+ __ jccb(Assembler::zero, no_mdo);
+ // Increment counter in the MDO
+ const Address mdo_invocation_counter(rax, in_bytes(MethodData::invocation_counter_offset()) +
+ in_bytes(InvocationCounter::counter_offset()));
+ const Address mask(rax, in_bytes(MethodData::invoke_mask_offset()));
+ __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rcx, false, Assembler::zero, overflow);
+ __ jmp(done);
+ }
+ __ bind(no_mdo);
+ // Increment counter in MethodCounters
+ const Address invocation_counter(rax,
+ MethodCounters::invocation_counter_offset() +
+ InvocationCounter::counter_offset());
+ __ get_method_counters(rbx, rax, done);
+ const Address mask(rax, in_bytes(MethodCounters::invoke_mask_offset()));
+ __ increment_mask_and_jump(invocation_counter, increment, mask, rcx,
+ false, Assembler::zero, overflow);
+ __ bind(done);
+ } else { // not TieredCompilation
+ const Address backedge_counter(rax,
+ MethodCounters::backedge_counter_offset() +
+ InvocationCounter::counter_offset());
+ const Address invocation_counter(rax,
+ MethodCounters::invocation_counter_offset() +
+ InvocationCounter::counter_offset());
+
+ __ get_method_counters(rbx, rax, done);
+
+ if (ProfileInterpreter) {
+ __ incrementl(Address(rax,
+ MethodCounters::interpreter_invocation_counter_offset()));
+ }
+ // Update standard invocation counters
+ __ movl(rcx, invocation_counter);
+ __ incrementl(rcx, InvocationCounter::count_increment);
+ __ movl(invocation_counter, rcx); // save invocation count
+
+ __ movl(rax, backedge_counter); // load backedge counter
+ __ andl(rax, InvocationCounter::count_mask_value); // mask out the status bits
+
+ __ addl(rcx, rax); // add both counters
+
+ // profile_method is non-null only for interpreted method so
+ // profile_method != NULL == !native_call
+
+ if (ProfileInterpreter && profile_method != NULL) {
+ // Test to see if we should create a method data oop
+ __ movptr(rax, Address(rbx, Method::method_counters_offset()));
+ __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
+ __ jcc(Assembler::less, *profile_method_continue);
+
+ // if no method data exists, go to profile_method
+ __ test_method_data_pointer(rax, *profile_method);
+ }
+
+ __ movptr(rax, Address(rbx, Method::method_counters_offset()));
+ __ cmp32(rcx, Address(rax, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
+ __ jcc(Assembler::aboveEqual, *overflow);
+ __ bind(done);
+ }
+}
+
+void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
+
+ // Asm interpreter on entry
+ // r14/rdi - locals
+ // r13/rsi - bcp
+ // rbx - method
+ // rdx - cpool --- DOES NOT APPEAR TO BE TRUE
+ // rbp - interpreter frame
+
+ // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
+ // Everything as it was on entry
+ // rdx is not restored. Doesn't appear to really be set.
+
+ // InterpreterRuntime::frequency_counter_overflow takes two
+ // arguments, the first (thread) is passed by call_VM, the second
+ // indicates if the counter overflow occurs at a backwards branch
+ // (NULL bcp). We pass zero for it. The call returns the address
+ // of the verified entry point for the method or NULL if the
+ // compilation did not complete (either went background or bailed
+ // out).
+ Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
+ __ movl(rarg, 0);
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::frequency_counter_overflow),
+ rarg);
+
+ __ movptr(rbx, Address(rbp, method_offset)); // restore Method*
+ // Preserve invariant that r13/r14 contain bcp/locals of sender frame
+ // and jump to the interpreted entry.
+ __ jmp(*do_continue, relocInfo::none);
+}
+
+// See if we've got enough room on the stack for locals plus overhead.
+// The expression stack grows down incrementally, so the normal guard
+// page mechanism will work for that.
+//
+// NOTE: Since the additional locals are also always pushed (wasn't
+// obvious in generate_fixed_frame) so the guard should work for them
+// too.
+//
+// Args:
+// rdx: number of additional locals this frame needs (what we must check)
+// rbx: Method*
+//
+// Kills:
+// rax
+void InterpreterGenerator::generate_stack_overflow_check(void) {
+
+ // monitor entry size: see picture of stack in frame_x86.hpp
+ const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
+
+ // total overhead size: entry_size + (saved rbp through expr stack
+ // bottom). be sure to change this if you add/subtract anything
+ // to/from the overhead area
+ const int overhead_size =
+ -(frame::interpreter_frame_initial_sp_offset * wordSize) + entry_size;
+
+ const int page_size = os::vm_page_size();
+
+ Label after_frame_check;
+
+ // see if the frame is greater than one page in size. If so,
+ // then we need to verify there is enough stack space remaining
+ // for the additional locals.
+ __ cmpl(rdx, (page_size - overhead_size) / Interpreter::stackElementSize);
+ __ jcc(Assembler::belowEqual, after_frame_check);
+
+ // compute rsp as if this were going to be the last frame on
+ // the stack before the red zone
+
+ Label after_frame_check_pop;
+ const Register thread = NOT_LP64(rsi) LP64_ONLY(r15_thread);
+#ifndef _LP64
+ __ push(thread);
+ __ get_thread(thread);
+#endif
+
+ const Address stack_base(thread, Thread::stack_base_offset());
+ const Address stack_size(thread, Thread::stack_size_offset());
+
+ // locals + overhead, in bytes
+ __ mov(rax, rdx);
+ __ shlptr(rax, Interpreter::logStackElementSize); // 2 slots per parameter.
+ __ addptr(rax, overhead_size);
+
+#ifdef ASSERT
+ Label stack_base_okay, stack_size_okay;
+ // verify that thread stack base is non-zero
+ __ cmpptr(stack_base, (int32_t)NULL_WORD);
+ __ jcc(Assembler::notEqual, stack_base_okay);
+ __ stop("stack base is zero");
+ __ bind(stack_base_okay);
+ // verify that thread stack size is non-zero
+ __ cmpptr(stack_size, 0);
+ __ jcc(Assembler::notEqual, stack_size_okay);
+ __ stop("stack size is zero");
+ __ bind(stack_size_okay);
+#endif
+
+ // Add stack base to locals and subtract stack size
+ __ addptr(rax, stack_base);
+ __ subptr(rax, stack_size);
+
+ // Use the maximum number of pages we might bang.
+ const int max_pages = StackShadowPages > (StackRedPages+StackYellowPages) ? StackShadowPages :
+ (StackRedPages+StackYellowPages);
+
+ // add in the red and yellow zone sizes
+ __ addptr(rax, max_pages * page_size);
+
+ // check against the current stack bottom
+ __ cmpptr(rsp, rax);
+
+ __ jcc(Assembler::above, after_frame_check_pop);
+ NOT_LP64(__ pop(rsi)); // get saved bcp
+
+ // Restore sender's sp as SP. This is necessary if the sender's
+ // frame is an extended compiled frame (see gen_c2i_adapter())
+ // and safer anyway in case of JSR292 adaptations.
+
+ __ pop(rax); // return address must be moved if SP is changed
+ __ mov(rsp, rbcp);
+ __ push(rax);
+
+ // Note: the restored frame is not necessarily interpreted.
+ // Use the shared runtime version of the StackOverflowError.
+ assert(StubRoutines::throw_StackOverflowError_entry() != NULL, "stub not yet generated");
+ __ jump(ExternalAddress(StubRoutines::throw_StackOverflowError_entry()));
+ // all done with frame size check
+ __ bind(after_frame_check_pop);
+ NOT_LP64(__ pop(rsi));
+
+ // all done with frame size check
+ __ bind(after_frame_check);
+}
+
+// Allocate monitor and lock method (asm interpreter)
+//
+// Args:
+// rbx: Method*
+// r14/rdi: locals
+//
+// Kills:
+// rax
+// c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
+// rscratch1, rscratch2 (scratch regs)
+void TemplateInterpreterGenerator::lock_method() {
+ // synchronize method
+ const Address access_flags(rbx, Method::access_flags_offset());
+ const Address monitor_block_top(
+ rbp,
+ frame::interpreter_frame_monitor_block_top_offset * wordSize);
+ const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
+
+#ifdef ASSERT
+ {
+ Label L;
+ __ movl(rax, access_flags);
+ __ testl(rax, JVM_ACC_SYNCHRONIZED);
+ __ jcc(Assembler::notZero, L);
+ __ stop("method doesn't need synchronization");
+ __ bind(L);
+ }
+#endif // ASSERT
+
+ // get synchronization object
+ {
+ const int mirror_offset = in_bytes(Klass::java_mirror_offset());
+ Label done;
+ __ movl(rax, access_flags);
+ __ testl(rax, JVM_ACC_STATIC);
+ // get receiver (assume this is frequent case)
+ __ movptr(rax, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
+ __ jcc(Assembler::zero, done);
+ __ movptr(rax, Address(rbx, Method::const_offset()));
+ __ movptr(rax, Address(rax, ConstMethod::constants_offset()));
+ __ movptr(rax, Address(rax,
+ ConstantPool::pool_holder_offset_in_bytes()));
+ __ movptr(rax, Address(rax, mirror_offset));
+
+#ifdef ASSERT
+ {
+ Label L;
+ __ testptr(rax, rax);
+ __ jcc(Assembler::notZero, L);
+ __ stop("synchronization object is NULL");
+ __ bind(L);
+ }
+#endif // ASSERT
+
+ __ bind(done);
+ }
+
+ // add space for monitor & lock
+ __ subptr(rsp, entry_size); // add space for a monitor entry
+ __ movptr(monitor_block_top, rsp); // set new monitor block top
+ // store object
+ __ movptr(Address(rsp, BasicObjectLock::obj_offset_in_bytes()), rax);
+ const Register lockreg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
+ __ movptr(lockreg, rsp); // object address
+ __ lock_object(lockreg);
+}
+
+// Generate a fixed interpreter frame. This is identical setup for
+// interpreted methods and for native methods hence the shared code.
+//
+// Args:
+// rax: return address
+// rbx: Method*
+// r14/rdi: pointer to locals
+// r13/rsi: sender sp
+// rdx: cp cache
+void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
+ // initialize fixed part of activation frame
+ __ push(rax); // save return address
+ __ enter(); // save old & set new rbp
+ __ push(rbcp); // set sender sp
+ __ push((int)NULL_WORD); // leave last_sp as null
+ __ movptr(rbcp, Address(rbx, Method::const_offset())); // get ConstMethod*
+ __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
+ __ push(rbx); // save Method*
+ if (ProfileInterpreter) {
+ Label method_data_continue;
+ __ movptr(rdx, Address(rbx, in_bytes(Method::method_data_offset())));
+ __ testptr(rdx, rdx);
+ __ jcc(Assembler::zero, method_data_continue);
+ __ addptr(rdx, in_bytes(MethodData::data_offset()));
+ __ bind(method_data_continue);
+ __ push(rdx); // set the mdp (method data pointer)
+ } else {
+ __ push(0);
+ }
+
+ __ movptr(rdx, Address(rbx, Method::const_offset()));
+ __ movptr(rdx, Address(rdx, ConstMethod::constants_offset()));
+ __ movptr(rdx, Address(rdx, ConstantPool::cache_offset_in_bytes()));
+ __ push(rdx); // set constant pool cache
+ __ push(rlocals); // set locals pointer
+ if (native_call) {
+ __ push(0); // no bcp
+ } else {
+ __ push(rbcp); // set bcp
+ }
+ __ push(0); // reserve word for pointer to expression stack bottom
+ __ movptr(Address(rsp, 0), rsp); // set expression stack bottom
+}
+
+// End of helpers
+
+// Method entry for java.lang.ref.Reference.get.
+address InterpreterGenerator::generate_Reference_get_entry(void) {
+#if INCLUDE_ALL_GCS
+ // Code: _aload_0, _getfield, _areturn
+ // parameter size = 1
+ //
+ // The code that gets generated by this routine is split into 2 parts:
+ // 1. The "intrinsified" code for G1 (or any SATB based GC),
+ // 2. The slow path - which is an expansion of the regular method entry.
+ //
+ // Notes:-
+ // * In the G1 code we do not check whether we need to block for
+ // a safepoint. If G1 is enabled then we must execute the specialized
+ // code for Reference.get (except when the Reference object is null)
+ // so that we can log the value in the referent field with an SATB
+ // update buffer.
+ // If the code for the getfield template is modified so that the
+ // G1 pre-barrier code is executed when the current method is
+ // Reference.get() then going through the normal method entry
+ // will be fine.
+ // * The G1 code can, however, check the receiver object (the instance
+ // of java.lang.Reference) and jump to the slow path if null. If the
+ // Reference object is null then we obviously cannot fetch the referent
+ // and so we don't need to call the G1 pre-barrier. Thus we can use the
+ // regular method entry code to generate the NPE.
+ //
+ // rbx: Method*
+
+ // r13: senderSP must preserve for slow path, set SP to it on fast path
+
+ address entry = __ pc();
+
+ const int referent_offset = java_lang_ref_Reference::referent_offset;
+ guarantee(referent_offset > 0, "referent offset not initialized");
+
+ if (UseG1GC) {
+ Label slow_path;
+ // rbx: method
+
+ // Check if local 0 != NULL
+ // If the receiver is null then it is OK to jump to the slow path.
+ __ movptr(rax, Address(rsp, wordSize));
+
+ __ testptr(rax, rax);
+ __ jcc(Assembler::zero, slow_path);
+
+ // rax: local 0
+ // rbx: method (but can be used as scratch now)
+ // rdx: scratch
+ // rdi: scratch
+
+ // Preserve the sender sp in case the pre-barrier
+ // calls the runtime
+ NOT_LP64(__ push(rsi));
+
+ // Generate the G1 pre-barrier code to log the value of
+ // the referent field in an SATB buffer.
+
+ // Load the value of the referent field.
+ const Address field_address(rax, referent_offset);
+ __ load_heap_oop(rax, field_address);
+
+ const Register sender_sp = NOT_LP64(rsi) LP64_ONLY(r13);
+ const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
+ NOT_LP64(__ get_thread(thread));
+
+ // Generate the G1 pre-barrier code to log the value of
+ // the referent field in an SATB buffer.
+ __ g1_write_barrier_pre(noreg /* obj */,
+ rax /* pre_val */,
+ thread /* thread */,
+ rbx /* tmp */,
+ true /* tosca_live */,
+ true /* expand_call */);
+
+ // _areturn
+ NOT_LP64(__ pop(rsi)); // get sender sp
+ __ pop(rdi); // get return address
+ __ mov(rsp, sender_sp); // set sp to sender sp
+ __ jmp(rdi);
+ __ ret(0);
+
+ // generate a vanilla interpreter entry as the slow path
+ __ bind(slow_path);
+ __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
+ return entry;
+ }
+#endif // INCLUDE_ALL_GCS
+
+ // If G1 is not enabled then attempt to go through the accessor entry point
+ // Reference.get is an accessor
+ return NULL;
+}
+
+// Interpreter stub for calling a native method. (asm interpreter)
+// This sets up a somewhat different looking stack for calling the
+// native method than the typical interpreter frame setup.
+address InterpreterGenerator::generate_native_entry(bool synchronized) {
+ // determine code generation flags
+ bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
+
+ // rbx: Method*
+ // rbcp: sender sp
+
+ address entry_point = __ pc();
+
+ const Address constMethod (rbx, Method::const_offset());
+ const Address access_flags (rbx, Method::access_flags_offset());
+ const Address size_of_parameters(rcx, ConstMethod::
+ size_of_parameters_offset());
+
+
+ // get parameter size (always needed)
+ __ movptr(rcx, constMethod);
+ __ load_unsigned_short(rcx, size_of_parameters);
+
+ // native calls don't need the stack size check since they have no
+ // expression stack and the arguments are already on the stack and
+ // we only add a handful of words to the stack
+
+ // rbx: Method*
+ // rcx: size of parameters
+ // rbcp: sender sp
+ __ pop(rax); // get return address
+
+ // for natives the size of locals is zero
+
+ // compute beginning of parameters
+ __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
+
+ // add 2 zero-initialized slots for native calls
+ // initialize result_handler slot
+ __ push((int) NULL_WORD);
+ // slot for oop temp
+ // (static native method holder mirror/jni oop result)
+ __ push((int) NULL_WORD);
+
+ // initialize fixed part of activation frame
+ generate_fixed_frame(true);
+
+ // make sure method is native & not abstract
+#ifdef ASSERT
+ __ movl(rax, access_flags);
+ {
+ Label L;
+ __ testl(rax, JVM_ACC_NATIVE);
+ __ jcc(Assembler::notZero, L);
+ __ stop("tried to execute non-native method as native");
+ __ bind(L);
+ }
+ {
+ Label L;
+ __ testl(rax, JVM_ACC_ABSTRACT);
+ __ jcc(Assembler::zero, L);
+ __ stop("tried to execute abstract method in interpreter");
+ __ bind(L);
+ }
+#endif
+
+ // Since at this point in the method invocation the exception handler
+ // would try to exit the monitor of synchronized methods which hasn't
+ // been entered yet, we set the thread local variable
+ // _do_not_unlock_if_synchronized to true. The remove_activation will
+ // check this flag.
+
+ const Register thread1 = NOT_LP64(rax) LP64_ONLY(r15_thread);
+ NOT_LP64(__ get_thread(thread1));
+ const Address do_not_unlock_if_synchronized(thread1,
+ in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
+ __ movbool(do_not_unlock_if_synchronized, true);
+
+ // increment invocation count & check for overflow
+ Label invocation_counter_overflow;
+ if (inc_counter) {
+ generate_counter_incr(&invocation_counter_overflow, NULL, NULL);
+ }
+
+ Label continue_after_compile;
+ __ bind(continue_after_compile);
+
+ bang_stack_shadow_pages(true);
+
+ // reset the _do_not_unlock_if_synchronized flag
+ NOT_LP64(__ get_thread(thread1));
+ __ movbool(do_not_unlock_if_synchronized, false);
+
+ // check for synchronized methods
+ // Must happen AFTER invocation_counter check and stack overflow check,
+ // so method is not locked if overflows.
+ if (synchronized) {
+ lock_method();
+ } else {
+ // no synchronization necessary
+#ifdef ASSERT
+ {
+ Label L;
+ __ movl(rax, access_flags);
+ __ testl(rax, JVM_ACC_SYNCHRONIZED);
+ __ jcc(Assembler::zero, L);
+ __ stop("method needs synchronization");
+ __ bind(L);
+ }
+#endif
+ }
+
+ // start execution
+#ifdef ASSERT
+ {
+ Label L;
+ const Address monitor_block_top(rbp,
+ frame::interpreter_frame_monitor_block_top_offset * wordSize);
+ __ movptr(rax, monitor_block_top);
+ __ cmpptr(rax, rsp);
+ __ jcc(Assembler::equal, L);
+ __ stop("broken stack frame setup in interpreter");
+ __ bind(L);
+ }
+#endif
+
+ // jvmti support
+ __ notify_method_entry();
+
+ // work registers
+ const Register method = rbx;
+ const Register thread = NOT_LP64(rdi) LP64_ONLY(r15_thread);
+ const Register t = NOT_LP64(rcx) LP64_ONLY(r11);
+
+ // allocate space for parameters
+ __ get_method(method);
+ __ movptr(t, Address(method, Method::const_offset()));
+ __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
+
+#ifndef _LP64
+ __ shlptr(t, Interpreter::logStackElementSize);
+ __ addptr(t, 2*wordSize); // allocate two more slots for JNIEnv and possible mirror
+ __ subptr(rsp, t);
+ __ andptr(rsp, -(StackAlignmentInBytes)); // gcc needs 16 byte aligned stacks to do XMM intrinsics
+#else
+ __ shll(t, Interpreter::logStackElementSize);
+
+ __ subptr(rsp, t);
+ __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
+ __ andptr(rsp, -16); // must be 16 byte boundary (see amd64 ABI)
+#endif // _LP64
+
+ // get signature handler
+ {
+ Label L;
+ __ movptr(t, Address(method, Method::signature_handler_offset()));
+ __ testptr(t, t);
+ __ jcc(Assembler::notZero, L);
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::prepare_native_call),
+ method);
+ __ get_method(method);
+ __ movptr(t, Address(method, Method::signature_handler_offset()));
+ __ bind(L);
+ }
+
+ // call signature handler
+ assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
+ "adjust this code");
+ assert(InterpreterRuntime::SignatureHandlerGenerator::to() == rsp,
+ "adjust this code");
+ assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == NOT_LP64(t) LP64_ONLY(rscratch1),
+ "adjust this code");
+
+ // The generated handlers do not touch RBX (the method oop).
+ // However, large signatures cannot be cached and are generated
+ // each time here. The slow-path generator can do a GC on return,
+ // so we must reload it after the call.
+ __ call(t);
+ __ get_method(method); // slow path can do a GC, reload RBX
+
+
+ // result handler is in rax
+ // set result handler
+ __ movptr(Address(rbp,
+ (frame::interpreter_frame_result_handler_offset) * wordSize),
+ rax);
+
+ // pass mirror handle if static call
+ {
+ Label L;
+ const int mirror_offset = in_bytes(Klass::java_mirror_offset());
+ __ movl(t, Address(method, Method::access_flags_offset()));
+ __ testl(t, JVM_ACC_STATIC);
+ __ jcc(Assembler::zero, L);
+ // get mirror
+ __ movptr(t, Address(method, Method::const_offset()));
+ __ movptr(t, Address(t, ConstMethod::constants_offset()));
+ __ movptr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
+ __ movptr(t, Address(t, mirror_offset));
+ // copy mirror into activation frame
+ __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize),
+ t);
+ // pass handle to mirror
+#ifndef _LP64
+ __ lea(t, Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
+ __ movptr(Address(rsp, wordSize), t);
+#else
+ __ lea(c_rarg1,
+ Address(rbp, frame::interpreter_frame_oop_temp_offset * wordSize));
+#endif // _LP64
+ __ bind(L);
+ }
+
+ // get native function entry point
+ {
+ Label L;
+ __ movptr(rax, Address(method, Method::native_function_offset()));
+ ExternalAddress unsatisfied(SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
+ __ cmpptr(rax, unsatisfied.addr());
+ __ jcc(Assembler::notEqual, L);
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::prepare_native_call),
+ method);
+ __ get_method(method);
+ __ movptr(rax, Address(method, Method::native_function_offset()));
+ __ bind(L);
+ }
+
+ // pass JNIEnv
+#ifndef _LP64
+ __ get_thread(thread);
+ __ lea(t, Address(thread, JavaThread::jni_environment_offset()));
+ __ movptr(Address(rsp, 0), t);
+
+ // set_last_Java_frame_before_call
+ // It is enough that the pc()
+ // points into the right code segment. It does not have to be the correct return pc.
+ __ set_last_Java_frame(thread, noreg, rbp, __ pc());
+#else
+ __ lea(c_rarg0, Address(r15_thread, JavaThread::jni_environment_offset()));
+
+ // It is enough that the pc() points into the right code
+ // segment. It does not have to be the correct return pc.
+ __ set_last_Java_frame(rsp, rbp, (address) __ pc());
+#endif // _LP64
+
+ // change thread state
+#ifdef ASSERT
+ {
+ Label L;
+ __ movl(t, Address(thread, JavaThread::thread_state_offset()));
+ __ cmpl(t, _thread_in_Java);
+ __ jcc(Assembler::equal, L);
+ __ stop("Wrong thread state in native stub");
+ __ bind(L);
+ }
+#endif
+
+ // Change state to native
+
+ __ movl(Address(thread, JavaThread::thread_state_offset()),
+ _thread_in_native);
+
+ // Call the native method.
+ __ call(rax);
+ // 32: result potentially in rdx:rax or ST0
+ // 64: result potentially in rax or xmm0
+
+ // Verify or restore cpu control state after JNI call
+ __ restore_cpu_control_state_after_jni();
+
+ // NOTE: The order of these pushes is known to frame::interpreter_frame_result
+ // in order to extract the result of a method call. If the order of these
+ // pushes change or anything else is added to the stack then the code in
+ // interpreter_frame_result must also change.
+
+#ifndef _LP64
+ // save potential result in ST(0) & rdx:rax
+ // (if result handler is the T_FLOAT or T_DOUBLE handler, result must be in ST0 -
+ // the check is necessary to avoid potential Intel FPU overflow problems by saving/restoring 'empty' FPU registers)
+ // It is safe to do this push because state is _thread_in_native and return address will be found
+ // via _last_native_pc and not via _last_jave_sp
+
+ // NOTE: the order of theses push(es) is known to frame::interpreter_frame_result.
+ // If the order changes or anything else is added to the stack the code in
+ // interpreter_frame_result will have to be changed.
+
+ { Label L;
+ Label push_double;
+ ExternalAddress float_handler(AbstractInterpreter::result_handler(T_FLOAT));
+ ExternalAddress double_handler(AbstractInterpreter::result_handler(T_DOUBLE));
+ __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
+ float_handler.addr());
+ __ jcc(Assembler::equal, push_double);
+ __ cmpptr(Address(rbp, (frame::interpreter_frame_oop_temp_offset + 1)*wordSize),
+ double_handler.addr());
+ __ jcc(Assembler::notEqual, L);
+ __ bind(push_double);
+ __ push_d(); // FP values are returned using the FPU, so push FPU contents (even if UseSSE > 0).
+ __ bind(L);
+ }
+#else
+ __ push(dtos);
+#endif // _LP64
+
+ __ push(ltos);
+
+ // change thread state
+ NOT_LP64(__ get_thread(thread));
+ __ movl(Address(thread, JavaThread::thread_state_offset()),
+ _thread_in_native_trans);
+
+ if (os::is_MP()) {
+ if (UseMembar) {
+ // Force this write out before the read below
+ __ membar(Assembler::Membar_mask_bits(
+ Assembler::LoadLoad | Assembler::LoadStore |
+ Assembler::StoreLoad | Assembler::StoreStore));
+ } else {
+ // Write serialization page so VM thread can do a pseudo remote membar.
+ // We use the current thread pointer to calculate a thread specific
+ // offset to write to within the page. This minimizes bus traffic
+ // due to cache line collision.
+ __ serialize_memory(thread, rcx);
+ }
+ }
+
+#ifndef _LP64
+ if (AlwaysRestoreFPU) {
+ // Make sure the control word is correct.
+ __ fldcw(ExternalAddress(StubRoutines::addr_fpu_cntrl_wrd_std()));
+ }
+#endif // _LP64
+
+ // check for safepoint operation in progress and/or pending suspend requests
+ {
+ Label Continue;
+ __ cmp32(ExternalAddress(SafepointSynchronize::address_of_state()),
+ SafepointSynchronize::_not_synchronized);
+
+ Label L;
+ __ jcc(Assembler::notEqual, L);
+ __ cmpl(Address(thread, JavaThread::suspend_flags_offset()), 0);
+ __ jcc(Assembler::equal, Continue);
+ __ bind(L);
+
+ // Don't use call_VM as it will see a possible pending exception
+ // and forward it and never return here preventing us from
+ // clearing _last_native_pc down below. Also can't use
+ // call_VM_leaf either as it will check to see if r13 & r14 are
+ // preserved and correspond to the bcp/locals pointers. So we do a
+ // runtime call by hand.
+ //
+#ifndef _LP64
+ __ push(thread);
+ __ call(RuntimeAddress(CAST_FROM_FN_PTR(address,
+ JavaThread::check_special_condition_for_native_trans)));
+ __ increment(rsp, wordSize);
+ __ get_thread(thread);
+#else
+ __ mov(c_rarg0, r15_thread);
+ __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
+ __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
+ __ andptr(rsp, -16); // align stack as required by ABI
+ __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans)));
+ __ mov(rsp, r12); // restore sp
+ __ reinit_heapbase();
+#endif // _LP64
+ __ bind(Continue);
+ }
+
+ // change thread state
+ __ movl(Address(thread, JavaThread::thread_state_offset()), _thread_in_Java);
+
+ // reset_last_Java_frame
+ __ reset_last_Java_frame(thread, true, true);
+
+ // reset handle block
+ __ movptr(t, Address(thread, JavaThread::active_handles_offset()));
+ __ movl(Address(t, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD);
+
+ // If result is an oop unbox and store it in frame where gc will see it
+ // and result handler will pick it up
+
+ {
+ Label no_oop, store_result;
+ __ lea(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
+ __ cmpptr(t, Address(rbp, frame::interpreter_frame_result_handler_offset*wordSize));
+ __ jcc(Assembler::notEqual, no_oop);
+ // retrieve result
+ __ pop(ltos);
+ __ testptr(rax, rax);
+ __ jcc(Assembler::zero, store_result);
+ __ movptr(rax, Address(rax, 0));
+ __ bind(store_result);
+ __ movptr(Address(rbp, frame::interpreter_frame_oop_temp_offset*wordSize), rax);
+ // keep stack depth as expected by pushing oop which will eventually be discarded
+ __ push(ltos);
+ __ bind(no_oop);
+ }
+
+
+ {
+ Label no_reguard;
+ __ cmpl(Address(thread, JavaThread::stack_guard_state_offset()),
+ JavaThread::stack_guard_yellow_disabled);
+ __ jcc(Assembler::notEqual, no_reguard);
+
+ __ pusha(); // XXX only save smashed registers
+#ifndef _LP64
+ __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
+ __ popa();
+#else
+ __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
+ __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows
+ __ andptr(rsp, -16); // align stack as required by ABI
+ __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages)));
+ __ mov(rsp, r12); // restore sp
+ __ popa(); // XXX only restore smashed registers
+ __ reinit_heapbase();
+#endif // _LP64
+
+ __ bind(no_reguard);
+ }
+
+
+ // The method register is junk from after the thread_in_native transition
+ // until here. Also can't call_VM until the bcp has been
+ // restored. Need bcp for throwing exception below so get it now.
+ __ get_method(method);
+
+ // restore to have legal interpreter frame, i.e., bci == 0 <=> code_base()
+ __ movptr(rbcp, Address(method, Method::const_offset())); // get ConstMethod*
+ __ lea(rbcp, Address(rbcp, ConstMethod::codes_offset())); // get codebase
+
+ // handle exceptions (exception handling will handle unlocking!)
+ {
+ Label L;
+ __ cmpptr(Address(thread, Thread::pending_exception_offset()), (int32_t) NULL_WORD);
+ __ jcc(Assembler::zero, L);
+ // Note: At some point we may want to unify this with the code
+ // used in call_VM_base(); i.e., we should use the
+ // StubRoutines::forward_exception code. For now this doesn't work
+ // here because the rsp is not correctly set at this point.
+ __ MacroAssembler::call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::throw_pending_exception));
+ __ should_not_reach_here();
+ __ bind(L);
+ }
+
+ // do unlocking if necessary
+ {
+ Label L;
+ __ movl(t, Address(method, Method::access_flags_offset()));
+ __ testl(t, JVM_ACC_SYNCHRONIZED);
+ __ jcc(Assembler::zero, L);
+ // the code below should be shared with interpreter macro
+ // assembler implementation
+ {
+ Label unlock;
+ // BasicObjectLock will be first in list, since this is a
+ // synchronized method. However, need to check that the object
+ // has not been unlocked by an explicit monitorexit bytecode.
+ const Address monitor(rbp,
+ (intptr_t)(frame::interpreter_frame_initial_sp_offset *
+ wordSize - (int)sizeof(BasicObjectLock)));
+
+ const Register regmon = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
+
+ // monitor expect in c_rarg1 for slow unlock path
+ __ lea(regmon, monitor); // address of first monitor
+
+ __ movptr(t, Address(regmon, BasicObjectLock::obj_offset_in_bytes()));
+ __ testptr(t, t);
+ __ jcc(Assembler::notZero, unlock);
+
+ // Entry already unlocked, need to throw exception
+ __ MacroAssembler::call_VM(noreg,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::throw_illegal_monitor_state_exception));
+ __ should_not_reach_here();
+
+ __ bind(unlock);
+ __ unlock_object(regmon);
+ }
+ __ bind(L);
+ }
+
+ // jvmti support
+ // Note: This must happen _after_ handling/throwing any exceptions since
+ // the exception handler code notifies the runtime of method exits
+ // too. If this happens before, method entry/exit notifications are
+ // not properly paired (was bug - gri 11/22/99).
+ __ notify_method_exit(vtos, InterpreterMacroAssembler::NotifyJVMTI);
+
+ // restore potential result in edx:eax, call result handler to
+ // restore potential result in ST0 & handle result
+
+ __ pop(ltos);
+ LP64_ONLY( __ pop(dtos));
+
+ __ movptr(t, Address(rbp,
+ (frame::interpreter_frame_result_handler_offset) * wordSize));
+ __ call(t);
+
+ // remove activation
+ __ movptr(t, Address(rbp,
+ frame::interpreter_frame_sender_sp_offset *
+ wordSize)); // get sender sp
+ __ leave(); // remove frame anchor
+ __ pop(rdi); // get return address
+ __ mov(rsp, t); // set sp to sender sp
+ __ jmp(rdi);
+
+ if (inc_counter) {
+ // Handle overflow of counter and compile method
+ __ bind(invocation_counter_overflow);
+ generate_counter_overflow(&continue_after_compile);
+ }
+
+ return entry_point;
+}
+
+//
+// Generic interpreted method entry to (asm) interpreter
+//
+address InterpreterGenerator::generate_normal_entry(bool synchronized) {
+ // determine code generation flags
+ bool inc_counter = UseCompiler || CountCompiledCalls || LogTouchedMethods;
+
+ // ebx: Method*
+ // rbcp: sender sp
+ address entry_point = __ pc();
+
+ const Address constMethod(rbx, Method::const_offset());
+ const Address access_flags(rbx, Method::access_flags_offset());
+ const Address size_of_parameters(rdx,
+ ConstMethod::size_of_parameters_offset());
+ const Address size_of_locals(rdx, ConstMethod::size_of_locals_offset());
+
+
+ // get parameter size (always needed)
+ __ movptr(rdx, constMethod);
+ __ load_unsigned_short(rcx, size_of_parameters);
+
+ // rbx: Method*
+ // rcx: size of parameters
+ // rbcp: sender_sp (could differ from sp+wordSize if we were called via c2i )
+
+ __ load_unsigned_short(rdx, size_of_locals); // get size of locals in words
+ __ subl(rdx, rcx); // rdx = no. of additional locals
+
+ // YYY
+// __ incrementl(rdx);
+// __ andl(rdx, -2);
+
+ // see if we've got enough room on the stack for locals plus overhead.
+ generate_stack_overflow_check();
+
+ // get return address
+ __ pop(rax);
+
+ // compute beginning of parameters
+ __ lea(rlocals, Address(rsp, rcx, Interpreter::stackElementScale(), -wordSize));
+
+ // rdx - # of additional locals
+ // allocate space for locals
+ // explicitly initialize locals
+ {
+ Label exit, loop;
+ __ testl(rdx, rdx);
+ __ jcc(Assembler::lessEqual, exit); // do nothing if rdx <= 0
+ __ bind(loop);
+ __ push((int) NULL_WORD); // initialize local variables
+ __ decrementl(rdx); // until everything initialized
+ __ jcc(Assembler::greater, loop);
+ __ bind(exit);
+ }
+
+ // initialize fixed part of activation frame
+ generate_fixed_frame(false);
+
+ // make sure method is not native & not abstract
+#ifdef ASSERT
+ __ movl(rax, access_flags);
+ {
+ Label L;
+ __ testl(rax, JVM_ACC_NATIVE);
+ __ jcc(Assembler::zero, L);
+ __ stop("tried to execute native method as non-native");
+ __ bind(L);
+ }
+ {
+ Label L;
+ __ testl(rax, JVM_ACC_ABSTRACT);
+ __ jcc(Assembler::zero, L);
+ __ stop("tried to execute abstract method in interpreter");
+ __ bind(L);
+ }
+#endif
+
+ // Since at this point in the method invocation the exception
+ // handler would try to exit the monitor of synchronized methods
+ // which hasn't been entered yet, we set the thread local variable
+ // _do_not_unlock_if_synchronized to true. The remove_activation
+ // will check this flag.
+
+ const Register thread = NOT_LP64(rax) LP64_ONLY(r15_thread);
+ NOT_LP64(__ get_thread(thread));
+ const Address do_not_unlock_if_synchronized(thread,
+ in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
+ __ movbool(do_not_unlock_if_synchronized, true);
+
+ __ profile_parameters_type(rax, rcx, rdx);
+ // increment invocation count & check for overflow
+ Label invocation_counter_overflow;
+ Label profile_method;
+ Label profile_method_continue;
+ if (inc_counter) {
+ generate_counter_incr(&invocation_counter_overflow,
+ &profile_method,
+ &profile_method_continue);
+ if (ProfileInterpreter) {
+ __ bind(profile_method_continue);
+ }
+ }
+
+ Label continue_after_compile;
+ __ bind(continue_after_compile);
+
+ // check for synchronized interpreted methods
+ bang_stack_shadow_pages(false);
+
+ // reset the _do_not_unlock_if_synchronized flag
+ NOT_LP64(__ get_thread(thread));
+ __ movbool(do_not_unlock_if_synchronized, false);
+
+ // check for synchronized methods
+ // Must happen AFTER invocation_counter check and stack overflow check,
+ // so method is not locked if overflows.
+ if (synchronized) {
+ // Allocate monitor and lock method
+ lock_method();
+ } else {
+ // no synchronization necessary
+#ifdef ASSERT
+ {
+ Label L;
+ __ movl(rax, access_flags);
+ __ testl(rax, JVM_ACC_SYNCHRONIZED);
+ __ jcc(Assembler::zero, L);
+ __ stop("method needs synchronization");
+ __ bind(L);
+ }
+#endif
+ }
+
+ // start execution
+#ifdef ASSERT
+ {
+ Label L;
+ const Address monitor_block_top (rbp,
+ frame::interpreter_frame_monitor_block_top_offset * wordSize);
+ __ movptr(rax, monitor_block_top);
+ __ cmpptr(rax, rsp);
+ __ jcc(Assembler::equal, L);
+ __ stop("broken stack frame setup in interpreter");
+ __ bind(L);
+ }
+#endif
+
+ // jvmti support
+ __ notify_method_entry();
+
+ __ dispatch_next(vtos);
+
+ // invocation counter overflow
+ if (inc_counter) {
+ if (ProfileInterpreter) {
+ // We have decided to profile this method in the interpreter
+ __ bind(profile_method);
+ __ call_VM(noreg, CAST_FROM_FN_PTR(address, InterpreterRuntime::profile_method));
+ __ set_method_data_pointer_for_bcp();
+ __ get_method(rbx);
+ __ jmp(profile_method_continue);
+ }
+ // Handle overflow of counter and compile method
+ __ bind(invocation_counter_overflow);
+ generate_counter_overflow(&continue_after_compile);
+ }
+
+ return entry_point;
+}
+
+//-----------------------------------------------------------------------------
+// Exceptions
+
+void TemplateInterpreterGenerator::generate_throw_exception() {
+ // Entry point in previous activation (i.e., if the caller was
+ // interpreted)
+ Interpreter::_rethrow_exception_entry = __ pc();
+ // Restore sp to interpreter_frame_last_sp even though we are going
+ // to empty the expression stack for the exception processing.
+ __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+ // rax: exception
+ // rdx: return address/pc that threw exception
+ __ restore_bcp(); // r13/rsi points to call/send
+ __ restore_locals();
+ LP64_ONLY(__ reinit_heapbase()); // restore r12 as heapbase.
+ // Entry point for exceptions thrown within interpreter code
+ Interpreter::_throw_exception_entry = __ pc();
+ // expression stack is undefined here
+ // rax: exception
+ // r13/rsi: exception bcp
+ __ verify_oop(rax);
+ Register rarg = NOT_LP64(rax) LP64_ONLY(c_rarg1);
+ LP64_ONLY(__ mov(c_rarg1, rax));
+
+ // expression stack must be empty before entering the VM in case of
+ // an exception
+ __ empty_expression_stack();
+ // find exception handler address and preserve exception oop
+ __ call_VM(rdx,
+ CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::exception_handler_for_exception),
+ rarg);
+ // rax: exception handler entry point
+ // rdx: preserved exception oop
+ // r13/rsi: bcp for exception handler
+ __ push_ptr(rdx); // push exception which is now the only value on the stack
+ __ jmp(rax); // jump to exception handler (may be _remove_activation_entry!)
+
+ // If the exception is not handled in the current frame the frame is
+ // removed and the exception is rethrown (i.e. exception
+ // continuation is _rethrow_exception).
+ //
+ // Note: At this point the bci is still the bxi for the instruction
+ // which caused the exception and the expression stack is
+ // empty. Thus, for any VM calls at this point, GC will find a legal
+ // oop map (with empty expression stack).
+
+ // In current activation
+ // tos: exception
+ // esi: exception bcp
+
+ //
+ // JVMTI PopFrame support
+ //
+
+ Interpreter::_remove_activation_preserving_args_entry = __ pc();
+ __ empty_expression_stack();
+ // Set the popframe_processing bit in pending_popframe_condition
+ // indicating that we are currently handling popframe, so that
+ // call_VMs that may happen later do not trigger new popframe
+ // handling cycles.
+ const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
+ NOT_LP64(__ get_thread(thread));
+ __ movl(rdx, Address(thread, JavaThread::popframe_condition_offset()));
+ __ orl(rdx, JavaThread::popframe_processing_bit);
+ __ movl(Address(thread, JavaThread::popframe_condition_offset()), rdx);
+
+ {
+ // Check to see whether we are returning to a deoptimized frame.
+ // (The PopFrame call ensures that the caller of the popped frame is
+ // either interpreted or compiled and deoptimizes it if compiled.)
+ // In this case, we can't call dispatch_next() after the frame is
+ // popped, but instead must save the incoming arguments and restore
+ // them after deoptimization has occurred.
+ //
+ // Note that we don't compare the return PC against the
+ // deoptimization blob's unpack entry because of the presence of
+ // adapter frames in C2.
+ Label caller_not_deoptimized;
+ Register rarg = NOT_LP64(rdx) LP64_ONLY(c_rarg1);
+ __ movptr(rarg, Address(rbp, frame::return_addr_offset * wordSize));
+ __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::interpreter_contains), rarg);
+ __ testl(rax, rax);
+ __ jcc(Assembler::notZero, caller_not_deoptimized);
+
+ // Compute size of arguments for saving when returning to
+ // deoptimized caller
+ __ get_method(rax);
+ __ movptr(rax, Address(rax, Method::const_offset()));
+ __ load_unsigned_short(rax, Address(rax, in_bytes(ConstMethod::
+ size_of_parameters_offset())));
+ __ shll(rax, Interpreter::logStackElementSize);
+ __ restore_locals();
+ __ subptr(rlocals, rax);
+ __ addptr(rlocals, wordSize);
+ // Save these arguments
+ NOT_LP64(__ get_thread(thread));
+ __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
+ Deoptimization::
+ popframe_preserve_args),
+ thread, rax, rlocals);
+
+ __ remove_activation(vtos, rdx,
+ /* throw_monitor_exception */ false,
+ /* install_monitor_exception */ false,
+ /* notify_jvmdi */ false);
+
+ // Inform deoptimization that it is responsible for restoring
+ // these arguments
+ NOT_LP64(__ get_thread(thread));
+ __ movl(Address(thread, JavaThread::popframe_condition_offset()),
+ JavaThread::popframe_force_deopt_reexecution_bit);
+
+ // Continue in deoptimization handler
+ __ jmp(rdx);
+
+ __ bind(caller_not_deoptimized);
+ }
+
+ __ remove_activation(vtos, rdx, /* rdx result (retaddr) is not used */
+ /* throw_monitor_exception */ false,
+ /* install_monitor_exception */ false,
+ /* notify_jvmdi */ false);
+
+ // Finish with popframe handling
+ // A previous I2C followed by a deoptimization might have moved the
+ // outgoing arguments further up the stack. PopFrame expects the
+ // mutations to those outgoing arguments to be preserved and other
+ // constraints basically require this frame to look exactly as
+ // though it had previously invoked an interpreted activation with
+ // no space between the top of the expression stack (current
+ // last_sp) and the top of stack. Rather than force deopt to
+ // maintain this kind of invariant all the time we call a small
+ // fixup routine to move the mutated arguments onto the top of our
+ // expression stack if necessary.
+#ifndef _LP64
+ __ mov(rax, rsp);
+ __ movptr(rbx, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
+ __ get_thread(thread);
+ // PC must point into interpreter here
+ __ set_last_Java_frame(thread, noreg, rbp, __ pc());
+ __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), thread, rax, rbx);
+ __ get_thread(thread);
+#else
+ __ mov(c_rarg1, rsp);
+ __ movptr(c_rarg2, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
+ // PC must point into interpreter here
+ __ set_last_Java_frame(noreg, rbp, __ pc());
+ __ super_call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::popframe_move_outgoing_args), r15_thread, c_rarg1, c_rarg2);
+#endif
+ __ reset_last_Java_frame(thread, true, true);
+
+ // Restore the last_sp and null it out
+ __ movptr(rsp, Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize));
+ __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+
+ __ restore_bcp();
+ __ restore_locals();
+ // The method data pointer was incremented already during
+ // call profiling. We have to restore the mdp for the current bcp.
+ if (ProfileInterpreter) {
+ __ set_method_data_pointer_for_bcp();
+ }
+
+ // Clear the popframe condition flag
+ NOT_LP64(__ get_thread(thread));
+ __ movl(Address(thread, JavaThread::popframe_condition_offset()),
+ JavaThread::popframe_inactive);
+
+#if INCLUDE_JVMTI
+ {
+ Label L_done;
+ const Register local0 = rlocals;
+
+ __ cmpb(Address(rbcp, 0), Bytecodes::_invokestatic);
+ __ jcc(Assembler::notEqual, L_done);
+
+ // The member name argument must be restored if _invokestatic is re-executed after a PopFrame call.
+ // Detect such a case in the InterpreterRuntime function and return the member name argument, or NULL.
+
+ __ get_method(rdx);
+ __ movptr(rax, Address(local0, 0));
+ __ call_VM(rax, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), rax, rdx, rbcp);
+
+ __ testptr(rax, rax);
+ __ jcc(Assembler::zero, L_done);
+
+ __ movptr(Address(rbx, 0), rax);
+ __ bind(L_done);
+ }
+#endif // INCLUDE_JVMTI
+
+ __ dispatch_next(vtos);
+ // end of PopFrame support
+
+ Interpreter::_remove_activation_entry = __ pc();
+
+ // preserve exception over this code sequence
+ __ pop_ptr(rax);
+ NOT_LP64(__ get_thread(thread));
+ __ movptr(Address(thread, JavaThread::vm_result_offset()), rax);
+ // remove the activation (without doing throws on illegalMonitorExceptions)
+ __ remove_activation(vtos, rdx, false, true, false);
+ // restore exception
+ NOT_LP64(__ get_thread(thread));
+ __ get_vm_result(rax, thread);
+
+ // In between activations - previous activation type unknown yet
+ // compute continuation point - the continuation point expects the
+ // following registers set up:
+ //
+ // rax: exception
+ // rdx: return address/pc that threw exception
+ // rsp: expression stack of caller
+ // rbp: ebp of caller
+ __ push(rax); // save exception
+ __ push(rdx); // save return address
+ __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
+ SharedRuntime::exception_handler_for_return_address),
+ thread, rdx);
+ __ mov(rbx, rax); // save exception handler
+ __ pop(rdx); // restore return address
+ __ pop(rax); // restore exception
+ // Note that an "issuing PC" is actually the next PC after the call
+ __ jmp(rbx); // jump to exception
+ // handler of caller
+}
+
+
+//
+// JVMTI ForceEarlyReturn support
+//
+address TemplateInterpreterGenerator::generate_earlyret_entry_for(TosState state) {
+ address entry = __ pc();
+
+ __ restore_bcp();
+ __ restore_locals();
+ __ empty_expression_stack();
+ __ load_earlyret_value(state); // 32 bits returns value in rdx, so don't reuse
+
+ const Register thread = NOT_LP64(rcx) LP64_ONLY(r15_thread);
+ NOT_LP64(__ get_thread(thread));
+ __ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
+ Address cond_addr(rcx, JvmtiThreadState::earlyret_state_offset());
+
+ // Clear the earlyret state
+ __ movl(cond_addr, JvmtiThreadState::earlyret_inactive);
+
+ __ remove_activation(state, rsi,
+ false, /* throw_monitor_exception */
+ false, /* install_monitor_exception */
+ true); /* notify_jvmdi */
+ __ jmp(rsi);
+
+ return entry;
+} // end of ForceEarlyReturn support
+
+
+//-----------------------------------------------------------------------------
+// Helper for vtos entry point generation
+
+void TemplateInterpreterGenerator::set_vtos_entry_points(Template* t,
+ address& bep,
+ address& cep,
+ address& sep,
+ address& aep,
+ address& iep,
+ address& lep,
+ address& fep,
+ address& dep,
+ address& vep) {
+ assert(t->is_valid() && t->tos_in() == vtos, "illegal template");
+ Label L;
+ aep = __ pc(); __ push_ptr(); __ jmp(L);
+#ifndef _LP64
+ fep = __ pc(); __ push(ftos); __ jmp(L);
+ dep = __ pc(); __ push(dtos); __ jmp(L);
+#else
+ fep = __ pc(); __ push_f(xmm0); __ jmp(L);
+ dep = __ pc(); __ push_d(xmm0); __ jmp(L);
+#endif // _LP64
+ lep = __ pc(); __ push_l(); __ jmp(L);
+ bep = cep = sep =
+ iep = __ pc(); __ push_i();
+ vep = __ pc();
+ __ bind(L);
+ generate_and_dispatch(t);
+}
+
+
+//-----------------------------------------------------------------------------
+// Generation of individual instructions
+
+// helpers for generate_and_dispatch
+
+
+InterpreterGenerator::InterpreterGenerator(StubQueue* code)
+ : TemplateInterpreterGenerator(code) {
+ generate_all(); // down here so it can be "virtual"
+}
+
+//-----------------------------------------------------------------------------
+
+// Non-product code
+#ifndef PRODUCT
+
+address TemplateInterpreterGenerator::generate_trace_code(TosState state) {
+ address entry = __ pc();
+
+#ifndef _LP64
+ // prepare expression stack
+ __ pop(rcx); // pop return address so expression stack is 'pure'
+ __ push(state); // save tosca
+
+ // pass tosca registers as arguments & call tracer
+ __ call_VM(noreg, CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode), rcx, rax, rdx);
+ __ mov(rcx, rax); // make sure return address is not destroyed by pop(state)
+ __ pop(state); // restore tosca
+
+ // return
+ __ jmp(rcx);
+#else
+ __ push(state);
+ __ push(c_rarg0);
+ __ push(c_rarg1);
+ __ push(c_rarg2);
+ __ push(c_rarg3);
+ __ mov(c_rarg2, rax); // Pass itos
+#ifdef _WIN64
+ __ movflt(xmm3, xmm0); // Pass ftos
+#endif
+ __ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
+ c_rarg1, c_rarg2, c_rarg3);
+ __ pop(c_rarg3);
+ __ pop(c_rarg2);
+ __ pop(c_rarg1);
+ __ pop(c_rarg0);
+ __ pop(state);
+ __ ret(0); // return from result handler
+#endif // _LP64
+
+ return entry;
+}
+
+void TemplateInterpreterGenerator::count_bytecode() {
+ __ incrementl(ExternalAddress((address) &BytecodeCounter::_counter_value));
+}
+
+void TemplateInterpreterGenerator::histogram_bytecode(Template* t) {
+ __ incrementl(ExternalAddress((address) &BytecodeHistogram::_counters[t->bytecode()]));
+}
+
+void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) {
+ __ mov32(rbx, ExternalAddress((address) &BytecodePairHistogram::_index));
+ __ shrl(rbx, BytecodePairHistogram::log2_number_of_codes);
+ __ orl(rbx,
+ ((int) t->bytecode()) <<
+ BytecodePairHistogram::log2_number_of_codes);
+ __ mov32(ExternalAddress((address) &BytecodePairHistogram::_index), rbx);
+ __ lea(rscratch1, ExternalAddress((address) BytecodePairHistogram::_counters));
+ __ incrementl(Address(rscratch1, rbx, Address::times_4));
+}
+
+
+void TemplateInterpreterGenerator::trace_bytecode(Template* t) {
+ // Call a little run-time stub to avoid blow-up for each bytecode.
+ // The run-time runtime saves the right registers, depending on
+ // the tosca in-state for the given template.
+
+ assert(Interpreter::trace_code(t->tos_in()) != NULL,
+ "entry must have been generated");
+#ifndef _LP64
+ __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
+#else
+ __ mov(r12, rsp); // remember sp (can only use r12 if not using call_VM)
+ __ andptr(rsp, -16); // align stack as required by ABI
+ __ call(RuntimeAddress(Interpreter::trace_code(t->tos_in())));
+ __ mov(rsp, r12); // restore sp
+ __ reinit_heapbase();
+#endif // _LP64
+}
+
+
+void TemplateInterpreterGenerator::stop_interpreter_at() {
+ Label L;
+ __ cmp32(ExternalAddress((address) &BytecodeCounter::_counter_value),
+ StopInterpreterAt);
+ __ jcc(Assembler::notEqual, L);
+ __ int3();
+ __ bind(L);
+}
+#endif // !PRODUCT
+#endif // ! CC_INTERP