--- a/hotspot/src/cpu/aarch64/vm/templateInterpreter_aarch64.cpp Sat Dec 05 05:15:35 2015 -0500
+++ b/hotspot/src/cpu/aarch64/vm/templateInterpreter_aarch64.cpp Sat Dec 05 10:40:22 2015 -0500
@@ -24,238 +24,12 @@
*/
#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 "interpreter/bytecodeTracer.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 <sys/types.h>
-
-#ifndef PRODUCT
+#include "oops/constMethod.hpp"
#include "oops/method.hpp"
-#endif // !PRODUCT
-
-#ifdef BUILTIN_SIM
-#include "../../../../../../simulator/simulator.hpp"
-#endif
-
-#define __ _masm->
-
-#ifndef CC_INTERP
-
-//-----------------------------------------------------------------------------
-
-extern "C" void entry(CodeBuffer*);
-
-//-----------------------------------------------------------------------------
-
-address TemplateInterpreterGenerator::generate_StackOverflowError_handler() {
- address entry = __ pc();
-
-#ifdef ASSERT
- {
- Label L;
- __ ldr(rscratch1, Address(rfp,
- frame::interpreter_frame_monitor_block_top_offset *
- wordSize));
- __ mov(rscratch2, sp);
- __ cmp(rscratch1, rscratch2); // maximal rsp for current rfp (stack
- // grows negative)
- __ br(Assembler::HS, 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 r1
- __ movw(c_rarg2, r1);
- __ mov(c_rarg1, (address)name);
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::
- throw_ArrayIndexOutOfBoundsException),
- c_rarg1, c_rarg2);
- return entry;
-}
-
-address TemplateInterpreterGenerator::generate_ClassCastException_handler() {
- address entry = __ pc();
-
- // object is at TOS
- __ pop(c_rarg1);
-
- // 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),
- c_rarg1);
- 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();
- if (pass_oop) {
- // object is at TOS
- __ pop(c_rarg2);
- }
- // expression stack must be empty before entering the VM if an
- // exception happened
- __ empty_expression_stack();
- // setup parameters
- __ lea(c_rarg1, Address((address)name));
- if (pass_oop) {
- __ call_VM(r0, CAST_FROM_FN_PTR(address,
- InterpreterRuntime::
- create_klass_exception),
- c_rarg1, c_rarg2);
- } else {
- // kind of lame ExternalAddress can't take NULL because
- // external_word_Relocation will assert.
- if (message != NULL) {
- __ lea(c_rarg2, Address((address)message));
- } else {
- __ mov(c_rarg2, NULL_WORD);
- }
- __ call_VM(r0,
- CAST_FROM_FN_PTR(address, InterpreterRuntime::create_exception),
- c_rarg1, c_rarg2);
- }
- // throw exception
- __ b(address(Interpreter::throw_exception_entry()));
- return entry;
-}
-
-address TemplateInterpreterGenerator::generate_continuation_for(TosState state) {
- address entry = __ pc();
- // NULL last_sp until next java call
- __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
- __ dispatch_next(state);
- return entry;
-}
-
-address TemplateInterpreterGenerator::generate_return_entry_for(TosState state, int step, size_t index_size) {
- address entry = __ pc();
-
- // Restore stack bottom in case i2c adjusted stack
- __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
- // and NULL it as marker that esp is now tos until next java call
- __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
- __ restore_bcp();
- __ restore_locals();
- __ restore_constant_pool_cache();
- __ get_method(rmethod);
-
- // Pop N words from the stack
- __ get_cache_and_index_at_bcp(r1, r2, 1, index_size);
- __ ldr(r1, Address(r1, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::flags_offset()));
- __ andr(r1, r1, ConstantPoolCacheEntry::parameter_size_mask);
-
- __ add(esp, esp, r1, Assembler::LSL, 3);
-
- // Restore machine SP
- __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
- __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
- __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
- __ ldr(rscratch2,
- Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
- __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
- __ andr(sp, rscratch1, -16);
-
-#ifndef PRODUCT
- // tell the simulator that the method has been reentered
- if (NotifySimulator) {
- __ notify(Assembler::method_reentry);
- }
-#endif
- __ get_dispatch();
- __ dispatch_next(state, step);
-
- return entry;
-}
-
-address TemplateInterpreterGenerator::generate_deopt_entry_for(TosState state,
- int step) {
- address entry = __ pc();
- __ restore_bcp();
- __ restore_locals();
- __ restore_constant_pool_cache();
- __ get_method(rmethod);
-
- // handle exceptions
- {
- Label L;
- __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
- __ cbz(rscratch1, L);
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::throw_pending_exception));
- __ should_not_reach_here();
- __ bind(L);
- }
-
- __ get_dispatch();
-
- // Calculate stack limit
- __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
- __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
- __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
- __ ldr(rscratch2,
- Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
- __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
- __ andr(sp, rscratch1, -16);
-
- // Restore expression stack pointer
- __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
- // NULL last_sp until next java call
- __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
-
- __ dispatch_next(state, step);
- return entry;
-}
+#include "runtime/frame.inline.hpp"
+#include "utilities/debug.hpp"
+#include "utilities/macros.hpp"
int AbstractInterpreter::BasicType_as_index(BasicType type) {
@@ -279,1195 +53,6 @@
return i;
}
-
-address TemplateInterpreterGenerator::generate_result_handler_for(
- BasicType type) {
- address entry = __ pc();
- switch (type) {
- case T_BOOLEAN: __ uxtb(r0, r0); break;
- case T_CHAR : __ uxth(r0, r0); break;
- case T_BYTE : __ sxtb(r0, r0); break;
- case T_SHORT : __ sxth(r0, r0); break;
- case T_INT : __ uxtw(r0, r0); break; // FIXME: We almost certainly don't need this
- case T_LONG : /* nothing to do */ break;
- case T_VOID : /* nothing to do */ break;
- case T_FLOAT : /* nothing to do */ break;
- case T_DOUBLE : /* nothing to do */ break;
- case T_OBJECT :
- // retrieve result from frame
- __ ldr(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
- // and verify it
- __ verify_oop(r0);
- break;
- default : ShouldNotReachHere();
- }
- __ ret(lr); // 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);
- __ membar(Assembler::AnyAny);
- __ 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
-//
-// rmethod: method
-//
-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?
- __ ldr(r0, Address(rmethod, Method::method_data_offset()));
- __ cbz(r0, no_mdo);
- // Increment counter in the MDO
- const Address mdo_invocation_counter(r0, in_bytes(MethodData::invocation_counter_offset()) +
- in_bytes(InvocationCounter::counter_offset()));
- const Address mask(r0, in_bytes(MethodData::invoke_mask_offset()));
- __ increment_mask_and_jump(mdo_invocation_counter, increment, mask, rscratch1, rscratch2, false, Assembler::EQ, overflow);
- __ b(done);
- }
- __ bind(no_mdo);
- // Increment counter in MethodCounters
- const Address invocation_counter(rscratch2,
- MethodCounters::invocation_counter_offset() +
- InvocationCounter::counter_offset());
- __ get_method_counters(rmethod, rscratch2, done);
- const Address mask(rscratch2, in_bytes(MethodCounters::invoke_mask_offset()));
- __ increment_mask_and_jump(invocation_counter, increment, mask, rscratch1, r1, false, Assembler::EQ, overflow);
- __ bind(done);
- } else { // not TieredCompilation
- const Address backedge_counter(rscratch2,
- MethodCounters::backedge_counter_offset() +
- InvocationCounter::counter_offset());
- const Address invocation_counter(rscratch2,
- MethodCounters::invocation_counter_offset() +
- InvocationCounter::counter_offset());
-
- __ get_method_counters(rmethod, rscratch2, done);
-
- if (ProfileInterpreter) { // %%% Merge this into MethodData*
- __ ldrw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset()));
- __ addw(r1, r1, 1);
- __ strw(r1, Address(rscratch2, MethodCounters::interpreter_invocation_counter_offset()));
- }
- // Update standard invocation counters
- __ ldrw(r1, invocation_counter);
- __ ldrw(r0, backedge_counter);
-
- __ addw(r1, r1, InvocationCounter::count_increment);
- __ andw(r0, r0, InvocationCounter::count_mask_value);
-
- __ strw(r1, invocation_counter);
- __ addw(r0, r0, r1); // 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
- __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
- __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_profile_limit_offset())));
- __ cmpw(r0, rscratch2);
- __ br(Assembler::LT, *profile_method_continue);
-
- // if no method data exists, go to profile_method
- __ test_method_data_pointer(r0, *profile_method);
- }
-
- {
- __ ldr(rscratch2, Address(rmethod, Method::method_counters_offset()));
- __ ldrw(rscratch2, Address(rscratch2, in_bytes(MethodCounters::interpreter_invocation_limit_offset())));
- __ cmpw(r0, rscratch2);
- __ br(Assembler::HS, *overflow);
- }
- __ bind(done);
- }
-}
-
-void InterpreterGenerator::generate_counter_overflow(Label* do_continue) {
-
- // Asm interpreter on entry
- // On return (i.e. jump to entry_point) [ back to invocation of interpreter ]
- // Everything as it was on entry
-
- // 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).
- __ mov(c_rarg1, 0);
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::frequency_counter_overflow),
- c_rarg1);
-
- __ b(*do_continue);
-}
-
-// 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_method_entry) so the guard should work for them
-// too.
-//
-// Args:
-// r3: number of additional locals this frame needs (what we must check)
-// rmethod: Method*
-//
-// Kills:
-// r0
-void InterpreterGenerator::generate_stack_overflow_check(void) {
-
- // monitor entry size: see picture of stack set
- // (generate_method_entry) and frame_amd64.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.
- //
- // Note that we use SUBS rather than CMP here because the immediate
- // field of this instruction may overflow. SUBS can cope with this
- // because it is a macro that will expand to some number of MOV
- // instructions and a register operation.
- __ subs(rscratch1, r3, (page_size - overhead_size) / Interpreter::stackElementSize);
- __ br(Assembler::LS, after_frame_check);
-
- // compute rsp as if this were going to be the last frame on
- // the stack before the red zone
-
- const Address stack_base(rthread, Thread::stack_base_offset());
- const Address stack_size(rthread, Thread::stack_size_offset());
-
- // locals + overhead, in bytes
- __ mov(r0, overhead_size);
- __ add(r0, r0, r3, Assembler::LSL, Interpreter::logStackElementSize); // 2 slots per parameter.
-
- __ ldr(rscratch1, stack_base);
- __ ldr(rscratch2, stack_size);
-
-#ifdef ASSERT
- Label stack_base_okay, stack_size_okay;
- // verify that thread stack base is non-zero
- __ cbnz(rscratch1, stack_base_okay);
- __ stop("stack base is zero");
- __ bind(stack_base_okay);
- // verify that thread stack size is non-zero
- __ cbnz(rscratch2, stack_size_okay);
- __ stop("stack size is zero");
- __ bind(stack_size_okay);
-#endif
-
- // Add stack base to locals and subtract stack size
- __ sub(rscratch1, rscratch1, rscratch2); // Stack limit
- __ add(r0, r0, rscratch1);
-
- // 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
- __ add(r0, r0, max_pages * page_size * 2);
-
- // check against the current stack bottom
- __ cmp(sp, r0);
- __ br(Assembler::HI, after_frame_check);
-
- // Remove the incoming args, peeling the machine SP back to where it
- // was in the caller. This is not strictly necessary, but unless we
- // do so the stack frame may have a garbage FP; this ensures a
- // correct call stack that we can always unwind. The ANDR should be
- // unnecessary because the sender SP in r13 is always aligned, but
- // it doesn't hurt.
- __ andr(sp, r13, -16);
-
- // 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");
- __ far_jump(RuntimeAddress(StubRoutines::throw_StackOverflowError_entry()));
-
- // all done with frame size check
- __ bind(after_frame_check);
-}
-
-// Allocate monitor and lock method (asm interpreter)
-//
-// Args:
-// rmethod: Method*
-// rlocals: locals
-//
-// Kills:
-// r0
-// c_rarg0, c_rarg1, c_rarg2, c_rarg3, ...(param regs)
-// rscratch1, rscratch2 (scratch regs)
-void TemplateInterpreterGenerator::lock_method() {
- // synchronize method
- const Address access_flags(rmethod, Method::access_flags_offset());
- const Address monitor_block_top(
- rfp,
- frame::interpreter_frame_monitor_block_top_offset * wordSize);
- const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
-
-#ifdef ASSERT
- {
- Label L;
- __ ldrw(r0, access_flags);
- __ tst(r0, JVM_ACC_SYNCHRONIZED);
- __ br(Assembler::NE, 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;
- __ ldrw(r0, access_flags);
- __ tst(r0, JVM_ACC_STATIC);
- // get receiver (assume this is frequent case)
- __ ldr(r0, Address(rlocals, Interpreter::local_offset_in_bytes(0)));
- __ br(Assembler::EQ, done);
- __ ldr(r0, Address(rmethod, Method::const_offset()));
- __ ldr(r0, Address(r0, ConstMethod::constants_offset()));
- __ ldr(r0, Address(r0,
- ConstantPool::pool_holder_offset_in_bytes()));
- __ ldr(r0, Address(r0, mirror_offset));
-
-#ifdef ASSERT
- {
- Label L;
- __ cbnz(r0, L);
- __ stop("synchronization object is NULL");
- __ bind(L);
- }
-#endif // ASSERT
-
- __ bind(done);
- }
-
- // add space for monitor & lock
- __ sub(sp, sp, entry_size); // add space for a monitor entry
- __ sub(esp, esp, entry_size);
- __ mov(rscratch1, esp);
- __ str(rscratch1, monitor_block_top); // set new monitor block top
- // store object
- __ str(r0, Address(esp, BasicObjectLock::obj_offset_in_bytes()));
- __ mov(c_rarg1, esp); // object address
- __ lock_object(c_rarg1);
-}
-
-// Generate a fixed interpreter frame. This is identical setup for
-// interpreted methods and for native methods hence the shared code.
-//
-// Args:
-// lr: return address
-// rmethod: Method*
-// rlocals: pointer to locals
-// rcpool: cp cache
-// stack_pointer: previous sp
-void TemplateInterpreterGenerator::generate_fixed_frame(bool native_call) {
- // initialize fixed part of activation frame
- if (native_call) {
- __ sub(esp, sp, 12 * wordSize);
- __ mov(rbcp, zr);
- __ stp(esp, zr, Address(__ pre(sp, -12 * wordSize)));
- // add 2 zero-initialized slots for native calls
- __ stp(zr, zr, Address(sp, 10 * wordSize));
- } else {
- __ sub(esp, sp, 10 * wordSize);
- __ ldr(rscratch1, Address(rmethod, Method::const_offset())); // get ConstMethod
- __ add(rbcp, rscratch1, in_bytes(ConstMethod::codes_offset())); // get codebase
- __ stp(esp, rbcp, Address(__ pre(sp, -10 * wordSize)));
- }
-
- if (ProfileInterpreter) {
- Label method_data_continue;
- __ ldr(rscratch1, Address(rmethod, Method::method_data_offset()));
- __ cbz(rscratch1, method_data_continue);
- __ lea(rscratch1, Address(rscratch1, in_bytes(MethodData::data_offset())));
- __ bind(method_data_continue);
- __ stp(rscratch1, rmethod, Address(sp, 4 * wordSize)); // save Method* and mdp (method data pointer)
- } else {
- __ stp(zr, rmethod, Address(sp, 4 * wordSize)); // save Method* (no mdp)
- }
-
- __ ldr(rcpool, Address(rmethod, Method::const_offset()));
- __ ldr(rcpool, Address(rcpool, ConstMethod::constants_offset()));
- __ ldr(rcpool, Address(rcpool, ConstantPool::cache_offset_in_bytes()));
- __ stp(rlocals, rcpool, Address(sp, 2 * wordSize));
-
- __ stp(rfp, lr, Address(sp, 8 * wordSize));
- __ lea(rfp, Address(sp, 8 * wordSize));
-
- // set sender sp
- // leave last_sp as null
- __ stp(zr, r13, Address(sp, 6 * wordSize));
-
- // Move SP out of the way
- if (! native_call) {
- __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
- __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
- __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 2);
- __ sub(rscratch1, sp, rscratch1, ext::uxtw, 3);
- __ andr(sp, rscratch1, -16);
- }
-}
-
-// End of helpers
-
-// Various method entries
-//------------------------------------------------------------------------------------------------------------------------
-//
-//
-
-// 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.
- //
- // This code is based on generate_accessor_enty.
- //
- // rmethod: 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;
- const Register local_0 = c_rarg0;
- // Check if local 0 != NULL
- // If the receiver is null then it is OK to jump to the slow path.
- __ ldr(local_0, Address(esp, 0));
- __ cbz(local_0, slow_path);
-
-
- // Load the value of the referent field.
- const Address field_address(local_0, referent_offset);
- __ load_heap_oop(local_0, field_address);
-
- // Generate the G1 pre-barrier code to log the value of
- // the referent field in an SATB buffer.
- __ enter(); // g1_write may call runtime
- __ g1_write_barrier_pre(noreg /* obj */,
- local_0 /* pre_val */,
- rthread /* thread */,
- rscratch2 /* tmp */,
- true /* tosca_live */,
- true /* expand_call */);
- __ leave();
- // areturn
- __ andr(sp, r13, -16); // done with stack
- __ ret(lr);
-
- // 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 generate_accessor_entry();
-}
-
-/**
- * Method entry for static native methods:
- * int java.util.zip.CRC32.update(int crc, int b)
- */
-address InterpreterGenerator::generate_CRC32_update_entry() {
- if (UseCRC32Intrinsics) {
- address entry = __ pc();
-
- // rmethod: Method*
- // r13: senderSP must preserved for slow path
- // esp: args
-
- Label slow_path;
- // If we need a safepoint check, generate full interpreter entry.
- ExternalAddress state(SafepointSynchronize::address_of_state());
- unsigned long offset;
- __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset);
- __ ldrw(rscratch1, Address(rscratch1, offset));
- assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code");
- __ cbnz(rscratch1, slow_path);
-
- // We don't generate local frame and don't align stack because
- // we call stub code and there is no safepoint on this path.
-
- // Load parameters
- const Register crc = c_rarg0; // crc
- const Register val = c_rarg1; // source java byte value
- const Register tbl = c_rarg2; // scratch
-
- // Arguments are reversed on java expression stack
- __ ldrw(val, Address(esp, 0)); // byte value
- __ ldrw(crc, Address(esp, wordSize)); // Initial CRC
-
- __ adrp(tbl, ExternalAddress(StubRoutines::crc_table_addr()), offset);
- __ add(tbl, tbl, offset);
-
- __ ornw(crc, zr, crc); // ~crc
- __ update_byte_crc32(crc, val, tbl);
- __ ornw(crc, zr, crc); // ~crc
-
- // result in c_rarg0
-
- __ andr(sp, r13, -16);
- __ ret(lr);
-
- // generate a vanilla native entry as the slow path
- __ bind(slow_path);
- __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
- return entry;
- }
- return NULL;
-}
-
-/**
- * Method entry for static native methods:
- * int java.util.zip.CRC32.updateBytes(int crc, byte[] b, int off, int len)
- * int java.util.zip.CRC32.updateByteBuffer(int crc, long buf, int off, int len)
- */
-address InterpreterGenerator::generate_CRC32_updateBytes_entry(AbstractInterpreter::MethodKind kind) {
- if (UseCRC32Intrinsics) {
- address entry = __ pc();
-
- // rmethod,: Method*
- // r13: senderSP must preserved for slow path
-
- Label slow_path;
- // If we need a safepoint check, generate full interpreter entry.
- ExternalAddress state(SafepointSynchronize::address_of_state());
- unsigned long offset;
- __ adrp(rscratch1, ExternalAddress(SafepointSynchronize::address_of_state()), offset);
- __ ldrw(rscratch1, Address(rscratch1, offset));
- assert(SafepointSynchronize::_not_synchronized == 0, "rewrite this code");
- __ cbnz(rscratch1, slow_path);
-
- // We don't generate local frame and don't align stack because
- // we call stub code and there is no safepoint on this path.
-
- // Load parameters
- const Register crc = c_rarg0; // crc
- const Register buf = c_rarg1; // source java byte array address
- const Register len = c_rarg2; // length
- const Register off = len; // offset (never overlaps with 'len')
-
- // Arguments are reversed on java expression stack
- // Calculate address of start element
- if (kind == Interpreter::java_util_zip_CRC32_updateByteBuffer) {
- __ ldr(buf, Address(esp, 2*wordSize)); // long buf
- __ ldrw(off, Address(esp, wordSize)); // offset
- __ add(buf, buf, off); // + offset
- __ ldrw(crc, Address(esp, 4*wordSize)); // Initial CRC
- } else {
- __ ldr(buf, Address(esp, 2*wordSize)); // byte[] array
- __ add(buf, buf, arrayOopDesc::base_offset_in_bytes(T_BYTE)); // + header size
- __ ldrw(off, Address(esp, wordSize)); // offset
- __ add(buf, buf, off); // + offset
- __ ldrw(crc, Address(esp, 3*wordSize)); // Initial CRC
- }
- // Can now load 'len' since we're finished with 'off'
- __ ldrw(len, Address(esp, 0x0)); // Length
-
- __ andr(sp, r13, -16); // Restore the caller's SP
-
- // We are frameless so we can just jump to the stub.
- __ b(CAST_FROM_FN_PTR(address, StubRoutines::updateBytesCRC32()));
-
- // generate a vanilla native entry as the slow path
- __ bind(slow_path);
- __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::native));
- return entry;
- }
- return NULL;
-}
-
-void InterpreterGenerator::bang_stack_shadow_pages(bool native_call) {
- // Bang each page in the shadow zone. We can't assume it's been done for
- // an interpreter frame with greater than a page of locals, so each page
- // needs to be checked. Only true for non-native.
- if (UseStackBanging) {
- const int start_page = native_call ? StackShadowPages : 1;
- const int page_size = os::vm_page_size();
- for (int pages = start_page; pages <= StackShadowPages ; pages++) {
- __ sub(rscratch2, sp, pages*page_size);
- __ str(zr, Address(rscratch2));
- }
- }
-}
-
-
-// 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;
-
- // r1: Method*
- // rscratch1: sender sp
-
- address entry_point = __ pc();
-
- const Address constMethod (rmethod, Method::const_offset());
- const Address access_flags (rmethod, Method::access_flags_offset());
- const Address size_of_parameters(r2, ConstMethod::
- size_of_parameters_offset());
-
- // get parameter size (always needed)
- __ ldr(r2, constMethod);
- __ load_unsigned_short(r2, 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
-
- // rmethod: Method*
- // r2: size of parameters
- // rscratch1: sender sp
-
- // for natives the size of locals is zero
-
- // compute beginning of parameters (rlocals)
- __ add(rlocals, esp, r2, ext::uxtx, 3);
- __ add(rlocals, rlocals, -wordSize);
-
- // Pull SP back to minimum size: this avoids holes in the stack
- __ andr(sp, esp, -16);
-
- // initialize fixed part of activation frame
- generate_fixed_frame(true);
-#ifndef PRODUCT
- // tell the simulator that a method has been entered
- if (NotifySimulator) {
- __ notify(Assembler::method_entry);
- }
-#endif
-
- // make sure method is native & not abstract
-#ifdef ASSERT
- __ ldrw(r0, access_flags);
- {
- Label L;
- __ tst(r0, JVM_ACC_NATIVE);
- __ br(Assembler::NE, L);
- __ stop("tried to execute non-native method as native");
- __ bind(L);
- }
- {
- Label L;
- __ tst(r0, JVM_ACC_ABSTRACT);
- __ br(Assembler::EQ, 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 Address do_not_unlock_if_synchronized(rthread,
- in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
- __ mov(rscratch2, true);
- __ strb(rscratch2, do_not_unlock_if_synchronized);
-
- // 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
- __ strb(zr, do_not_unlock_if_synchronized);
-
- // 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;
- __ ldrw(r0, access_flags);
- __ tst(r0, JVM_ACC_SYNCHRONIZED);
- __ br(Assembler::EQ, L);
- __ stop("method needs synchronization");
- __ bind(L);
- }
-#endif
- }
-
- // start execution
-#ifdef ASSERT
- {
- Label L;
- const Address monitor_block_top(rfp,
- frame::interpreter_frame_monitor_block_top_offset * wordSize);
- __ ldr(rscratch1, monitor_block_top);
- __ cmp(esp, rscratch1);
- __ br(Assembler::EQ, L);
- __ stop("broken stack frame setup in interpreter");
- __ bind(L);
- }
-#endif
-
- // jvmti support
- __ notify_method_entry();
-
- // work registers
- const Register t = r17;
- const Register result_handler = r19;
-
- // allocate space for parameters
- __ ldr(t, Address(rmethod, Method::const_offset()));
- __ load_unsigned_short(t, Address(t, ConstMethod::size_of_parameters_offset()));
-
- __ sub(rscratch1, esp, t, ext::uxtx, Interpreter::logStackElementSize);
- __ andr(sp, rscratch1, -16);
- __ mov(esp, rscratch1);
-
- // get signature handler
- {
- Label L;
- __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
- __ cbnz(t, L);
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::prepare_native_call),
- rmethod);
- __ ldr(t, Address(rmethod, Method::signature_handler_offset()));
- __ bind(L);
- }
-
- // call signature handler
- assert(InterpreterRuntime::SignatureHandlerGenerator::from() == rlocals,
- "adjust this code");
- assert(InterpreterRuntime::SignatureHandlerGenerator::to() == sp,
- "adjust this code");
- assert(InterpreterRuntime::SignatureHandlerGenerator::temp() == rscratch1,
- "adjust this code");
-
- // The generated handlers do not touch rmethod (the method).
- // 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.
- __ blr(t);
- __ get_method(rmethod); // slow path can do a GC, reload rmethod
-
-
- // result handler is in r0
- // set result handler
- __ mov(result_handler, r0);
- // pass mirror handle if static call
- {
- Label L;
- const int mirror_offset = in_bytes(Klass::java_mirror_offset());
- __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
- __ tst(t, JVM_ACC_STATIC);
- __ br(Assembler::EQ, L);
- // get mirror
- __ ldr(t, Address(rmethod, Method::const_offset()));
- __ ldr(t, Address(t, ConstMethod::constants_offset()));
- __ ldr(t, Address(t, ConstantPool::pool_holder_offset_in_bytes()));
- __ ldr(t, Address(t, mirror_offset));
- // copy mirror into activation frame
- __ str(t, Address(rfp, frame::interpreter_frame_oop_temp_offset * wordSize));
- // pass handle to mirror
- __ add(c_rarg1, rfp, frame::interpreter_frame_oop_temp_offset * wordSize);
- __ bind(L);
- }
-
- // get native function entry point in r10
- {
- Label L;
- __ ldr(r10, Address(rmethod, Method::native_function_offset()));
- address unsatisfied = (SharedRuntime::native_method_throw_unsatisfied_link_error_entry());
- __ mov(rscratch2, unsatisfied);
- __ ldr(rscratch2, rscratch2);
- __ cmp(r10, rscratch2);
- __ br(Assembler::NE, L);
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::prepare_native_call),
- rmethod);
- __ get_method(rmethod);
- __ ldr(r10, Address(rmethod, Method::native_function_offset()));
- __ bind(L);
- }
-
- // pass JNIEnv
- __ add(c_rarg0, rthread, in_bytes(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(esp, rfp, (address)NULL, rscratch1);
-
- // change thread state
-#ifdef ASSERT
- {
- Label L;
- __ ldrw(t, Address(rthread, JavaThread::thread_state_offset()));
- __ cmp(t, _thread_in_Java);
- __ br(Assembler::EQ, L);
- __ stop("Wrong thread state in native stub");
- __ bind(L);
- }
-#endif
-
- // Change state to native
- __ mov(rscratch1, _thread_in_native);
- __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
- __ stlrw(rscratch1, rscratch2);
-
- // Call the native method.
- __ blrt(r10, rscratch1);
- __ maybe_isb();
- __ get_method(rmethod);
- // result potentially in r0 or v0
-
- // make room for the pushes we're about to do
- __ sub(rscratch1, esp, 4 * wordSize);
- __ andr(sp, rscratch1, -16);
-
- // 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.
- __ push(dtos);
- __ push(ltos);
-
- // change thread state
- __ mov(rscratch1, _thread_in_native_trans);
- __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
- __ stlrw(rscratch1, rscratch2);
-
- if (os::is_MP()) {
- if (UseMembar) {
- // Force this write out before the read below
- __ dsb(Assembler::SY);
- } 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(rthread, rscratch2);
- }
- }
-
- // check for safepoint operation in progress and/or pending suspend requests
- {
- Label Continue;
- {
- unsigned long offset;
- __ adrp(rscratch2, SafepointSynchronize::address_of_state(), offset);
- __ ldrw(rscratch2, Address(rscratch2, offset));
- }
- assert(SafepointSynchronize::_not_synchronized == 0,
- "SafepointSynchronize::_not_synchronized");
- Label L;
- __ cbnz(rscratch2, L);
- __ ldrw(rscratch2, Address(rthread, JavaThread::suspend_flags_offset()));
- __ cbz(rscratch2, 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. So we do a runtime call by
- // hand.
- //
- __ mov(c_rarg0, rthread);
- __ mov(rscratch2, CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans));
- __ blrt(rscratch2, 1, 0, 0);
- __ maybe_isb();
- __ get_method(rmethod);
- __ reinit_heapbase();
- __ bind(Continue);
- }
-
- // change thread state
- __ mov(rscratch1, _thread_in_Java);
- __ lea(rscratch2, Address(rthread, JavaThread::thread_state_offset()));
- __ stlrw(rscratch1, rscratch2);
-
- // reset_last_Java_frame
- __ reset_last_Java_frame(true, true);
-
- // reset handle block
- __ ldr(t, Address(rthread, JavaThread::active_handles_offset()));
- __ str(zr, Address(t, JNIHandleBlock::top_offset_in_bytes()));
-
- // 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;
- __ adr(t, ExternalAddress(AbstractInterpreter::result_handler(T_OBJECT)));
- __ cmp(t, result_handler);
- __ br(Assembler::NE, no_oop);
- // retrieve result
- __ pop(ltos);
- __ cbz(r0, store_result);
- __ ldr(r0, Address(r0, 0));
- __ bind(store_result);
- __ str(r0, Address(rfp, frame::interpreter_frame_oop_temp_offset*wordSize));
- // keep stack depth as expected by pushing oop which will eventually be discarded
- __ push(ltos);
- __ bind(no_oop);
- }
-
- {
- Label no_reguard;
- __ lea(rscratch1, Address(rthread, in_bytes(JavaThread::stack_guard_state_offset())));
- __ ldrb(rscratch1, Address(rscratch1));
- __ cmp(rscratch1, JavaThread::stack_guard_yellow_disabled);
- __ br(Assembler::NE, no_reguard);
-
- __ pusha(); // XXX only save smashed registers
- __ mov(c_rarg0, rthread);
- __ mov(rscratch2, CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages));
- __ blrt(rscratch2, 0, 0, 0);
- __ popa(); // XXX only restore smashed registers
- __ 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(rmethod);
-
- // restore bcp to have legal interpreter frame, i.e., bci == 0 <=>
- // rbcp == code_base()
- __ ldr(rbcp, Address(rmethod, Method::const_offset())); // get ConstMethod*
- __ add(rbcp, rbcp, in_bytes(ConstMethod::codes_offset())); // get codebase
- // handle exceptions (exception handling will handle unlocking!)
- {
- Label L;
- __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset()));
- __ cbz(rscratch1, 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;
- __ ldrw(t, Address(rmethod, Method::access_flags_offset()));
- __ tst(t, JVM_ACC_SYNCHRONIZED);
- __ br(Assembler::EQ, 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.
-
- // monitor expect in c_rarg1 for slow unlock path
- __ lea (c_rarg1, Address(rfp, // address of first monitor
- (intptr_t)(frame::interpreter_frame_initial_sp_offset *
- wordSize - sizeof(BasicObjectLock))));
-
- __ ldr(t, Address(c_rarg1, BasicObjectLock::obj_offset_in_bytes()));
- __ cbnz(t, 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(c_rarg1);
- }
- __ 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 r0:d0, call result handler to
- // restore potential result in ST0 & handle result
-
- __ pop(ltos);
- __ pop(dtos);
-
- __ blr(result_handler);
-
- // remove activation
- __ ldr(esp, Address(rfp,
- frame::interpreter_frame_sender_sp_offset *
- wordSize)); // get sender sp
- // remove frame anchor
- __ leave();
-
- // resture sender sp
- __ mov(sp, esp);
-
- __ ret(lr);
-
- 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;
-
- // rscratch1: sender sp
- address entry_point = __ pc();
-
- const Address constMethod(rmethod, Method::const_offset());
- const Address access_flags(rmethod, Method::access_flags_offset());
- const Address size_of_parameters(r3,
- ConstMethod::size_of_parameters_offset());
- const Address size_of_locals(r3, ConstMethod::size_of_locals_offset());
-
- // get parameter size (always needed)
- // need to load the const method first
- __ ldr(r3, constMethod);
- __ load_unsigned_short(r2, size_of_parameters);
-
- // r2: size of parameters
-
- __ load_unsigned_short(r3, size_of_locals); // get size of locals in words
- __ sub(r3, r3, r2); // r3 = no. of additional locals
-
- // see if we've got enough room on the stack for locals plus overhead.
- generate_stack_overflow_check();
-
- // compute beginning of parameters (rlocals)
- __ add(rlocals, esp, r2, ext::uxtx, 3);
- __ sub(rlocals, rlocals, wordSize);
-
- // Make room for locals
- __ sub(rscratch1, esp, r3, ext::uxtx, 3);
- __ andr(sp, rscratch1, -16);
-
- // r3 - # of additional locals
- // allocate space for locals
- // explicitly initialize locals
- {
- Label exit, loop;
- __ ands(zr, r3, r3);
- __ br(Assembler::LE, exit); // do nothing if r3 <= 0
- __ bind(loop);
- __ str(zr, Address(__ post(rscratch1, wordSize)));
- __ sub(r3, r3, 1); // until everything initialized
- __ cbnz(r3, loop);
- __ bind(exit);
- }
-
- // And the base dispatch table
- __ get_dispatch();
-
- // initialize fixed part of activation frame
- generate_fixed_frame(false);
-#ifndef PRODUCT
- // tell the simulator that a method has been entered
- if (NotifySimulator) {
- __ notify(Assembler::method_entry);
- }
-#endif
- // make sure method is not native & not abstract
-#ifdef ASSERT
- __ ldrw(r0, access_flags);
- {
- Label L;
- __ tst(r0, JVM_ACC_NATIVE);
- __ br(Assembler::EQ, L);
- __ stop("tried to execute native method as non-native");
- __ bind(L);
- }
- {
- Label L;
- __ tst(r0, JVM_ACC_ABSTRACT);
- __ br(Assembler::EQ, 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 Address do_not_unlock_if_synchronized(rthread,
- in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
- __ mov(rscratch2, true);
- __ strb(rscratch2, do_not_unlock_if_synchronized);
-
- // 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);
-
- bang_stack_shadow_pages(false);
-
- // reset the _do_not_unlock_if_synchronized flag
- __ strb(zr, do_not_unlock_if_synchronized);
-
- // 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;
- __ ldrw(r0, access_flags);
- __ tst(r0, JVM_ACC_SYNCHRONIZED);
- __ br(Assembler::EQ, L);
- __ stop("method needs synchronization");
- __ bind(L);
- }
-#endif
- }
-
- // start execution
-#ifdef ASSERT
- {
- Label L;
- const Address monitor_block_top (rfp,
- frame::interpreter_frame_monitor_block_top_offset * wordSize);
- __ ldr(rscratch1, monitor_block_top);
- __ cmp(esp, rscratch1);
- __ br(Assembler::EQ, 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();
- // don't think we need this
- __ get_method(r1);
- __ b(profile_method_continue);
- }
- // Handle overflow of counter and compile method
- __ bind(invocation_counter_overflow);
- generate_counter_overflow(&continue_after_compile);
- }
-
- return entry_point;
-}
-
// These should never be compiled since the interpreter will prefer
// the compiled version to the intrinsic version.
bool AbstractInterpreter::can_be_compiled(methodHandle m) {
@@ -1593,483 +178,3 @@
*interpreter_frame->interpreter_frame_cache_addr() =
method->constants()->cache();
}
-
-
-//-----------------------------------------------------------------------------
-// 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.
- __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
- // r0: exception
- // r3: return address/pc that threw exception
- __ restore_bcp(); // rbcp points to call/send
- __ restore_locals();
- __ restore_constant_pool_cache();
- __ reinit_heapbase(); // restore rheapbase as heapbase.
- __ get_dispatch();
-
-#ifndef PRODUCT
- // tell the simulator that the caller method has been reentered
- if (NotifySimulator) {
- __ get_method(rmethod);
- __ notify(Assembler::method_reentry);
- }
-#endif
- // Entry point for exceptions thrown within interpreter code
- Interpreter::_throw_exception_entry = __ pc();
- // If we came here via a NullPointerException on the receiver of a
- // method, rmethod may be corrupt.
- __ get_method(rmethod);
- // expression stack is undefined here
- // r0: exception
- // rbcp: exception bcp
- __ verify_oop(r0);
- __ mov(c_rarg1, r0);
-
- // 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(r3,
- CAST_FROM_FN_PTR(address,
- InterpreterRuntime::exception_handler_for_exception),
- c_rarg1);
-
- // Calculate stack limit
- __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
- __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
- __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
- __ ldr(rscratch2,
- Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
- __ sub(rscratch1, rscratch2, rscratch1, ext::uxtx, 3);
- __ andr(sp, rscratch1, -16);
-
- // r0: exception handler entry point
- // r3: preserved exception oop
- // rbcp: bcp for exception handler
- __ push_ptr(r3); // push exception which is now the only value on the stack
- __ br(r0); // 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).
-
- //
- // 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.
- __ ldrw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
- __ orr(r3, r3, JavaThread::popframe_processing_bit);
- __ strw(r3, Address(rthread, JavaThread::popframe_condition_offset()));
-
- {
- // 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;
- __ ldr(c_rarg1, Address(rfp, frame::return_addr_offset * wordSize));
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
- InterpreterRuntime::interpreter_contains), c_rarg1);
- __ cbnz(r0, caller_not_deoptimized);
-
- // Compute size of arguments for saving when returning to
- // deoptimized caller
- __ get_method(r0);
- __ ldr(r0, Address(r0, Method::const_offset()));
- __ load_unsigned_short(r0, Address(r0, in_bytes(ConstMethod::
- size_of_parameters_offset())));
- __ lsl(r0, r0, Interpreter::logStackElementSize);
- __ restore_locals(); // XXX do we need this?
- __ sub(rlocals, rlocals, r0);
- __ add(rlocals, rlocals, wordSize);
- // Save these arguments
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
- Deoptimization::
- popframe_preserve_args),
- rthread, r0, rlocals);
-
- __ remove_activation(vtos,
- /* throw_monitor_exception */ false,
- /* install_monitor_exception */ false,
- /* notify_jvmdi */ false);
-
- // Inform deoptimization that it is responsible for restoring
- // these arguments
- __ mov(rscratch1, JavaThread::popframe_force_deopt_reexecution_bit);
- __ strw(rscratch1, Address(rthread, JavaThread::popframe_condition_offset()));
-
- // Continue in deoptimization handler
- __ ret(lr);
-
- __ bind(caller_not_deoptimized);
- }
-
- __ remove_activation(vtos,
- /* throw_monitor_exception */ false,
- /* install_monitor_exception */ false,
- /* notify_jvmdi */ false);
-
- // Restore the last_sp and null it out
- __ ldr(esp, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
- __ str(zr, Address(rfp, frame::interpreter_frame_last_sp_offset * wordSize));
-
- __ restore_bcp();
- __ restore_locals();
- __ restore_constant_pool_cache();
- __ get_method(rmethod);
-
- // 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
- __ strw(zr, Address(rthread, JavaThread::popframe_condition_offset()));
- assert(JavaThread::popframe_inactive == 0, "fix popframe_inactive");
-
-#if INCLUDE_JVMTI
- {
- Label L_done;
-
- __ ldrb(rscratch1, Address(rbcp, 0));
- __ cmpw(r1, Bytecodes::_invokestatic);
- __ br(Assembler::EQ, 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.
-
- __ ldr(c_rarg0, Address(rlocals, 0));
- __ call_VM(r0, CAST_FROM_FN_PTR(address, InterpreterRuntime::member_name_arg_or_null), c_rarg0, rmethod, rbcp);
-
- __ cbz(r0, L_done);
-
- __ str(r0, Address(esp, 0));
- __ bind(L_done);
- }
-#endif // INCLUDE_JVMTI
-
- // Restore machine SP
- __ ldr(rscratch1, Address(rmethod, Method::const_offset()));
- __ ldrh(rscratch1, Address(rscratch1, ConstMethod::max_stack_offset()));
- __ add(rscratch1, rscratch1, frame::interpreter_frame_monitor_size() + 4);
- __ ldr(rscratch2,
- Address(rfp, frame::interpreter_frame_initial_sp_offset * wordSize));
- __ sub(rscratch1, rscratch2, rscratch1, ext::uxtw, 3);
- __ andr(sp, rscratch1, -16);
-
- __ dispatch_next(vtos);
- // end of PopFrame support
-
- Interpreter::_remove_activation_entry = __ pc();
-
- // preserve exception over this code sequence
- __ pop_ptr(r0);
- __ str(r0, Address(rthread, JavaThread::vm_result_offset()));
- // remove the activation (without doing throws on illegalMonitorExceptions)
- __ remove_activation(vtos, false, true, false);
- // restore exception
- // restore exception
- __ get_vm_result(r0, rthread);
-
- // In between activations - previous activation type unknown yet
- // compute continuation point - the continuation point expects the
- // following registers set up:
- //
- // r0: exception
- // lr: return address/pc that threw exception
- // rsp: expression stack of caller
- // rfp: fp of caller
- // FIXME: There's no point saving LR here because VM calls don't trash it
- __ stp(r0, lr, Address(__ pre(sp, -2 * wordSize))); // save exception & return address
- __ super_call_VM_leaf(CAST_FROM_FN_PTR(address,
- SharedRuntime::exception_handler_for_return_address),
- rthread, lr);
- __ mov(r1, r0); // save exception handler
- __ ldp(r0, lr, Address(__ post(sp, 2 * wordSize))); // restore exception & return address
- // We might be returning to a deopt handler that expects r3 to
- // contain the exception pc
- __ mov(r3, lr);
- // Note that an "issuing PC" is actually the next PC after the call
- __ br(r1); // 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);
-
- __ ldr(rscratch1, Address(rthread, JavaThread::jvmti_thread_state_offset()));
- Address cond_addr(rscratch1, JvmtiThreadState::earlyret_state_offset());
-
- // Clear the earlyret state
- assert(JvmtiThreadState::earlyret_inactive == 0, "should be");
- __ str(zr, cond_addr);
-
- __ remove_activation(state,
- false, /* throw_monitor_exception */
- false, /* install_monitor_exception */
- true); /* notify_jvmdi */
- __ ret(lr);
-
- 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(); __ b(L);
- fep = __ pc(); __ push_f(); __ b(L);
- dep = __ pc(); __ push_d(); __ b(L);
- lep = __ pc(); __ push_l(); __ b(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();
-
- __ push(lr);
- __ push(state);
- __ push(RegSet::range(r0, r15), sp);
- __ mov(c_rarg2, r0); // Pass itos
- __ call_VM(noreg,
- CAST_FROM_FN_PTR(address, SharedRuntime::trace_bytecode),
- c_rarg1, c_rarg2, c_rarg3);
- __ pop(RegSet::range(r0, r15), sp);
- __ pop(state);
- __ pop(lr);
- __ ret(lr); // return from result handler
-
- return entry;
-}
-
-void TemplateInterpreterGenerator::count_bytecode() {
- Register rscratch3 = r0;
- __ push(rscratch1);
- __ push(rscratch2);
- __ push(rscratch3);
- Label L;
- __ mov(rscratch2, (address) &BytecodeCounter::_counter_value);
- __ bind(L);
- __ ldxr(rscratch1, rscratch2);
- __ add(rscratch1, rscratch1, 1);
- __ stxr(rscratch3, rscratch1, rscratch2);
- __ cbnzw(rscratch3, L);
- __ pop(rscratch3);
- __ pop(rscratch2);
- __ pop(rscratch1);
-}
-
-void TemplateInterpreterGenerator::histogram_bytecode(Template* t) { ; }
-
-void TemplateInterpreterGenerator::histogram_bytecode_pair(Template* t) { ; }
-
-
-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");
- __ bl(Interpreter::trace_code(t->tos_in()));
- __ reinit_heapbase();
-}
-
-
-void TemplateInterpreterGenerator::stop_interpreter_at() {
- Label L;
- __ push(rscratch1);
- __ mov(rscratch1, (address) &BytecodeCounter::_counter_value);
- __ ldr(rscratch1, Address(rscratch1));
- __ mov(rscratch2, StopInterpreterAt);
- __ cmpw(rscratch1, rscratch2);
- __ br(Assembler::NE, L);
- __ brk(0);
- __ bind(L);
- __ pop(rscratch1);
-}
-
-#ifdef BUILTIN_SIM
-
-#include <sys/mman.h>
-#include <unistd.h>
-
-extern "C" {
- static int PAGESIZE = getpagesize();
- int is_mapped_address(u_int64_t address)
- {
- address = (address & ~((u_int64_t)PAGESIZE - 1));
- if (msync((void *)address, PAGESIZE, MS_ASYNC) == 0) {
- return true;
- }
- if (errno != ENOMEM) {
- return true;
- }
- return false;
- }
-
- void bccheck1(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode)
- {
- if (method != 0) {
- method[0] = '\0';
- }
- if (bcidx != 0) {
- *bcidx = -2;
- }
- if (decode != 0) {
- decode[0] = 0;
- }
-
- if (framesize != 0) {
- *framesize = -1;
- }
-
- if (Interpreter::contains((address)pc)) {
- AArch64Simulator *sim = AArch64Simulator::get_current(UseSimulatorCache, DisableBCCheck);
- Method* meth;
- address bcp;
- if (fp) {
-#define FRAME_SLOT_METHOD 3
-#define FRAME_SLOT_BCP 7
- meth = (Method*)sim->getMemory()->loadU64(fp - (FRAME_SLOT_METHOD << 3));
- bcp = (address)sim->getMemory()->loadU64(fp - (FRAME_SLOT_BCP << 3));
-#undef FRAME_SLOT_METHOD
-#undef FRAME_SLOT_BCP
- } else {
- meth = (Method*)sim->getCPUState().xreg(RMETHOD, 0);
- bcp = (address)sim->getCPUState().xreg(RBCP, 0);
- }
- if (meth->is_native()) {
- return;
- }
- if(method && meth->is_method()) {
- ResourceMark rm;
- method[0] = 'I';
- method[1] = ' ';
- meth->name_and_sig_as_C_string(method + 2, 398);
- }
- if (bcidx) {
- if (meth->contains(bcp)) {
- *bcidx = meth->bci_from(bcp);
- } else {
- *bcidx = -2;
- }
- }
- if (decode) {
- if (!BytecodeTracer::closure()) {
- BytecodeTracer::set_closure(BytecodeTracer::std_closure());
- }
- stringStream str(decode, 400);
- BytecodeTracer::trace(meth, bcp, &str);
- }
- } else {
- if (method) {
- CodeBlob *cb = CodeCache::find_blob((address)pc);
- if (cb != NULL) {
- if (cb->is_nmethod()) {
- ResourceMark rm;
- nmethod* nm = (nmethod*)cb;
- method[0] = 'C';
- method[1] = ' ';
- nm->method()->name_and_sig_as_C_string(method + 2, 398);
- } else if (cb->is_adapter_blob()) {
- strcpy(method, "B adapter blob");
- } else if (cb->is_runtime_stub()) {
- strcpy(method, "B runtime stub");
- } else if (cb->is_exception_stub()) {
- strcpy(method, "B exception stub");
- } else if (cb->is_deoptimization_stub()) {
- strcpy(method, "B deoptimization stub");
- } else if (cb->is_safepoint_stub()) {
- strcpy(method, "B safepoint stub");
- } else if (cb->is_uncommon_trap_stub()) {
- strcpy(method, "B uncommon trap stub");
- } else if (cb->contains((address)StubRoutines::call_stub())) {
- strcpy(method, "B call stub");
- } else {
- strcpy(method, "B unknown blob : ");
- strcat(method, cb->name());
- }
- if (framesize != NULL) {
- *framesize = cb->frame_size();
- }
- }
- }
- }
- }
-
-
- JNIEXPORT void bccheck(u_int64_t pc, u_int64_t fp, char *method, int *bcidx, int *framesize, char *decode)
- {
- bccheck1(pc, fp, method, bcidx, framesize, decode);
- }
-}
-
-#endif // BUILTIN_SIM
-#endif // !PRODUCT
-#endif // ! CC_INTERP