src/cpu/x86/vm/interp_masm_x86.cpp
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*** old/src/cpu/x86/vm/interp_masm_x86.cpp Mon Mar 9 16:17:33 2015
--- new/src/cpu/x86/vm/interp_masm_x86.cpp Mon Mar 9 16:17:32 2015
*** 23,33 ****
--- 23,46 ----
*/
#include "precompiled.hpp"
#include "interp_masm_x86.hpp"
#include "interpreter/interpreter.hpp"
+ #include "interpreter/interpreterRuntime.hpp"
+ #include "oops/arrayOop.hpp"
+ #include "oops/markOop.hpp"
#include "oops/methodData.hpp"
+ #include "oops/method.hpp"
+ #include "prims/jvmtiExport.hpp"
+ #include "prims/jvmtiRedefineClassesTrace.hpp"
+ #include "prims/jvmtiThreadState.hpp"
+ #include "runtime/basicLock.hpp"
+ #include "runtime/biasedLocking.hpp"
+ #include "runtime/sharedRuntime.hpp"
+ #include "runtime/thread.inline.hpp"
+
+ // Implementation of InterpreterMacroAssembler
#ifndef CC_INTERP
void InterpreterMacroAssembler::profile_obj_type(Register obj, const Address& mdo_addr) {
Label update, next, none;
*** 225,229 ****
--- 238,1876 ----
bind(profile_continue);
}
}
#endif
+
+ #ifdef CC_INTERP
+ void InterpreterMacroAssembler::get_method(Register reg) {
+ movptr(reg, Address(rbp, -(sizeof(BytecodeInterpreter) + 2 * wordSize)));
+ movptr(reg, Address(reg, byte_offset_of(BytecodeInterpreter, _method)));
+ }
+ #endif // CC_INTERP
+
+ #ifndef CC_INTERP
+ void InterpreterMacroAssembler::call_VM_leaf_base(address entry_point,
+ int number_of_arguments) {
+ // interpreter specific
+ //
+ // Note: No need to save/restore bcp & locals (r13 & r14) pointer
+ // since these are callee saved registers and no blocking/
+ // GC can happen in leaf calls.
+ // Further Note: DO NOT save/restore bcp/locals. If a caller has
+ // already saved them so that it can use esi/edi as temporaries
+ // then a save/restore here will DESTROY the copy the caller
+ // saved! There used to be a save_bcp() that only happened in
+ // the ASSERT path (no restore_bcp). Which caused bizarre failures
+ // when jvm built with ASSERTs.
+ #ifdef ASSERT
+ {
+ Label L;
+ cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+ jcc(Assembler::equal, L);
+ stop("InterpreterMacroAssembler::call_VM_leaf_base:"
+ " last_sp != NULL");
+ bind(L);
+ }
+ #endif
+ // super call
+ MacroAssembler::call_VM_leaf_base(entry_point, number_of_arguments);
+ // interpreter specific
+ // Used to ASSERT that r13/r14 were equal to frame's bcp/locals
+ // but since they may not have been saved (and we don't want to
+ // save them here (see note above) the assert is invalid.
+ }
+
+ void InterpreterMacroAssembler::call_VM_base(Register oop_result,
+ Register java_thread,
+ Register last_java_sp,
+ address entry_point,
+ int number_of_arguments,
+ bool check_exceptions) {
+ // interpreter specific
+ //
+ // Note: Could avoid restoring locals ptr (callee saved) - however doesn't
+ // really make a difference for these runtime calls, since they are
+ // slow anyway. Btw., bcp must be saved/restored since it may change
+ // due to GC.
+ NOT_LP64(assert(java_thread == noreg , "not expecting a precomputed java thread");)
+ save_bcp();
+ #ifdef ASSERT
+ {
+ Label L;
+ cmpptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD);
+ jcc(Assembler::equal, L);
+ stop("InterpreterMacroAssembler::call_VM_leaf_base:"
+ " last_sp != NULL");
+ bind(L);
+ }
+ #endif /* ASSERT */
+ // super call
+ MacroAssembler::call_VM_base(oop_result, noreg, last_java_sp,
+ entry_point, number_of_arguments,
+ check_exceptions);
+ // interpreter specific
+ restore_bcp();
+ restore_locals();
+ }
+
+ void InterpreterMacroAssembler::check_and_handle_popframe(Register java_thread) {
+ if (JvmtiExport::can_pop_frame()) {
+ Label L;
+ // Initiate popframe handling only if it is not already being
+ // processed. If the flag has the popframe_processing bit set, it
+ // means that this code is called *during* popframe handling - we
+ // don't want to reenter.
+ // This method is only called just after the call into the vm in
+ // call_VM_base, so the arg registers are available.
+ Register pop_cond = NOT_LP64(java_thread) // Not clear if any other register is available on 32 bit
+ LP64_ONLY(c_rarg0);
+ movl(pop_cond, Address(java_thread, JavaThread::popframe_condition_offset()));
+ testl(pop_cond, JavaThread::popframe_pending_bit);
+ jcc(Assembler::zero, L);
+ testl(pop_cond, JavaThread::popframe_processing_bit);
+ jcc(Assembler::notZero, L);
+ // Call Interpreter::remove_activation_preserving_args_entry() to get the
+ // address of the same-named entrypoint in the generated interpreter code.
+ call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_preserving_args_entry));
+ jmp(rax);
+ bind(L);
+ NOT_LP64(get_thread(java_thread);)
+ }
+ }
+
+ void InterpreterMacroAssembler::load_earlyret_value(TosState state) {
+ Register thread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
+ NOT_LP64(get_thread(thread);)
+ movptr(rcx, Address(thread, JavaThread::jvmti_thread_state_offset()));
+ const Address tos_addr(rcx, JvmtiThreadState::earlyret_tos_offset());
+ const Address oop_addr(rcx, JvmtiThreadState::earlyret_oop_offset());
+ const Address val_addr(rcx, JvmtiThreadState::earlyret_value_offset());
+ #ifdef _LP64
+ switch (state) {
+ case atos: movptr(rax, oop_addr);
+ movptr(oop_addr, (int32_t)NULL_WORD);
+ verify_oop(rax, state); break;
+ case ltos: movptr(rax, val_addr); break;
+ case btos: // fall through
+ case ctos: // fall through
+ case stos: // fall through
+ case itos: movl(rax, val_addr); break;
+ case ftos: movflt(xmm0, val_addr); break;
+ case dtos: movdbl(xmm0, val_addr); break;
+ case vtos: /* nothing to do */ break;
+ default : ShouldNotReachHere();
+ }
+ // Clean up tos value in the thread object
+ movl(tos_addr, (int) ilgl);
+ movl(val_addr, (int32_t) NULL_WORD);
+ #else
+ const Address val_addr1(rcx, JvmtiThreadState::earlyret_value_offset()
+ + in_ByteSize(wordSize));
+ switch (state) {
+ case atos: movptr(rax, oop_addr);
+ movptr(oop_addr, NULL_WORD);
+ verify_oop(rax, state); break;
+ case ltos:
+ movl(rdx, val_addr1); // fall through
+ case btos: // fall through
+ case ctos: // fall through
+ case stos: // fall through
+ case itos: movl(rax, val_addr); break;
+ case ftos: fld_s(val_addr); break;
+ case dtos: fld_d(val_addr); break;
+ case vtos: /* nothing to do */ break;
+ default : ShouldNotReachHere();
+ }
+ #endif // _LP64
+ // Clean up tos value in the thread object
+ movl(tos_addr, (int32_t) ilgl);
+ movptr(val_addr, NULL_WORD);
+ NOT_LP64(movptr(val_addr1, NULL_WORD);)
+ }
+
+
+ void InterpreterMacroAssembler::check_and_handle_earlyret(Register java_thread) {
+ if (JvmtiExport::can_force_early_return()) {
+ Label L;
+ Register tmp = LP64_ONLY(c_rarg0) NOT_LP64(java_thread);
+ Register rthread = LP64_ONLY(r15_thread) NOT_LP64(java_thread);
+
+ movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
+ testptr(tmp, tmp);
+ jcc(Assembler::zero, L); // if (thread->jvmti_thread_state() == NULL) exit;
+
+ // Initiate earlyret handling only if it is not already being processed.
+ // If the flag has the earlyret_processing bit set, it means that this code
+ // is called *during* earlyret handling - we don't want to reenter.
+ movl(tmp, Address(tmp, JvmtiThreadState::earlyret_state_offset()));
+ cmpl(tmp, JvmtiThreadState::earlyret_pending);
+ jcc(Assembler::notEqual, L);
+
+ // Call Interpreter::remove_activation_early_entry() to get the address of the
+ // same-named entrypoint in the generated interpreter code.
+ NOT_LP64(get_thread(java_thread);)
+ movptr(tmp, Address(rthread, JavaThread::jvmti_thread_state_offset()));
+ #ifdef _LP64
+ movl(tmp, Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
+ call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), tmp);
+ #else
+ pushl(Address(tmp, JvmtiThreadState::earlyret_tos_offset()));
+ call_VM_leaf(CAST_FROM_FN_PTR(address, Interpreter::remove_activation_early_entry), 1);
+ #endif // _LP64
+ jmp(rax);
+ bind(L);
+ NOT_LP64(get_thread(java_thread);)
+ }
+ }
+
+ void InterpreterMacroAssembler::get_unsigned_2_byte_index_at_bcp(Register reg, int bcp_offset) {
+ assert(bcp_offset >= 0, "bcp is still pointing to start of bytecode");
+ load_unsigned_short(reg, Address(_bcp_register, bcp_offset));
+ bswapl(reg);
+ shrl(reg, 16);
+ }
+
+ void InterpreterMacroAssembler::get_cache_index_at_bcp(Register index,
+ int bcp_offset,
+ size_t index_size) {
+ assert(bcp_offset > 0, "bcp is still pointing to start of bytecode");
+ if (index_size == sizeof(u2)) {
+ load_unsigned_short(index, Address(_bcp_register, bcp_offset));
+ } else if (index_size == sizeof(u4)) {
+ movl(index, Address(_bcp_register, bcp_offset));
+ // Check if the secondary index definition is still ~x, otherwise
+ // we have to change the following assembler code to calculate the
+ // plain index.
+ assert(ConstantPool::decode_invokedynamic_index(~123) == 123, "else change next line");
+ notl(index); // convert to plain index
+ } else if (index_size == sizeof(u1)) {
+ load_unsigned_byte(index, Address(_bcp_register, bcp_offset));
+ } else {
+ ShouldNotReachHere();
+ }
+ }
+
+ void InterpreterMacroAssembler::get_cache_and_index_at_bcp(Register cache,
+ Register index,
+ int bcp_offset,
+ size_t index_size) {
+ assert_different_registers(cache, index);
+ get_cache_index_at_bcp(index, bcp_offset, index_size);
+ movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
+ assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
+ // convert from field index to ConstantPoolCacheEntry index
+ assert(exact_log2(in_words(ConstantPoolCacheEntry::size())) == 2, "else change next line");
+ shll(index, 2);
+ }
+
+ void InterpreterMacroAssembler::get_cache_and_index_and_bytecode_at_bcp(Register cache,
+ Register index,
+ Register bytecode,
+ int byte_no,
+ int bcp_offset,
+ size_t index_size) {
+ get_cache_and_index_at_bcp(cache, index, bcp_offset, index_size);
+ // We use a 32-bit load here since the layout of 64-bit words on
+ // little-endian machines allow us that.
+ movl(bytecode, Address(cache, index, Address::times_ptr, ConstantPoolCache::base_offset() + ConstantPoolCacheEntry::indices_offset()));
+ const int shift_count = (1 + byte_no) * BitsPerByte;
+ assert((byte_no == TemplateTable::f1_byte && shift_count == ConstantPoolCacheEntry::bytecode_1_shift) ||
+ (byte_no == TemplateTable::f2_byte && shift_count == ConstantPoolCacheEntry::bytecode_2_shift),
+ "correct shift count");
+ shrl(bytecode, shift_count);
+ assert(ConstantPoolCacheEntry::bytecode_1_mask == ConstantPoolCacheEntry::bytecode_2_mask, "common mask");
+ andl(bytecode, ConstantPoolCacheEntry::bytecode_1_mask);
+ }
+
+ void InterpreterMacroAssembler::get_cache_entry_pointer_at_bcp(Register cache,
+ Register tmp,
+ int bcp_offset,
+ size_t index_size) {
+ assert(cache != tmp, "must use different register");
+ get_cache_index_at_bcp(tmp, bcp_offset, index_size);
+ assert(sizeof(ConstantPoolCacheEntry) == 4 * wordSize, "adjust code below");
+ // convert from field index to ConstantPoolCacheEntry index
+ // and from word offset to byte offset
+ assert(exact_log2(in_bytes(ConstantPoolCacheEntry::size_in_bytes())) == 2 + LogBytesPerWord, "else change next line");
+ shll(tmp, 2 + LogBytesPerWord);
+ movptr(cache, Address(rbp, frame::interpreter_frame_cache_offset * wordSize));
+ // skip past the header
+ addptr(cache, in_bytes(ConstantPoolCache::base_offset()));
+ addptr(cache, tmp); // construct pointer to cache entry
+ }
+
+ // Load object from cpool->resolved_references(index)
+ void InterpreterMacroAssembler::load_resolved_reference_at_index(
+ Register result, Register index) {
+ assert_different_registers(result, index);
+ // convert from field index to resolved_references() index and from
+ // word index to byte offset. Since this is a java object, it can be compressed
+ Register tmp = index; // reuse
+ shll(tmp, LogBytesPerHeapOop);
+
+ get_constant_pool(result);
+ // load pointer for resolved_references[] objArray
+ movptr(result, Address(result, ConstantPool::resolved_references_offset_in_bytes()));
+ // JNIHandles::resolve(obj);
+ movptr(result, Address(result, 0));
+ // Add in the index
+ addptr(result, tmp);
+ load_heap_oop(result, Address(result, arrayOopDesc::base_offset_in_bytes(T_OBJECT)));
+ }
+
+
+ // Generate a subtype check: branch to ok_is_subtype if sub_klass is a
+ // subtype of super_klass.
+ //
+ // Args:
+ // rax: superklass
+ // Rsub_klass: subklass
+ //
+ // Kills:
+ // rcx, rdi
+ void InterpreterMacroAssembler::gen_subtype_check(Register Rsub_klass,
+ Label& ok_is_subtype) {
+ assert(Rsub_klass != rax, "rax holds superklass");
+ LP64_ONLY(assert(Rsub_klass != r14, "r14 holds locals");)
+ LP64_ONLY(assert(Rsub_klass != r13, "r13 holds bcp");)
+ assert(Rsub_klass != rcx, "rcx holds 2ndary super array length");
+ assert(Rsub_klass != rdi, "rdi holds 2ndary super array scan ptr");
+
+ // Profile the not-null value's klass.
+ profile_typecheck(rcx, Rsub_klass, rdi); // blows rcx, reloads rdi
+
+ // Do the check.
+ check_klass_subtype(Rsub_klass, rax, rcx, ok_is_subtype); // blows rcx
+
+ // Profile the failure of the check.
+ profile_typecheck_failed(rcx); // blows rcx
+ }
+
+
+ #ifndef _LP64
+ void InterpreterMacroAssembler::f2ieee() {
+ if (IEEEPrecision) {
+ fstp_s(Address(rsp, 0));
+ fld_s(Address(rsp, 0));
+ }
+ }
+
+
+ void InterpreterMacroAssembler::d2ieee() {
+ if (IEEEPrecision) {
+ fstp_d(Address(rsp, 0));
+ fld_d(Address(rsp, 0));
+ }
+ }
+ #endif // _LP64
+
+ // Java Expression Stack
+
+ void InterpreterMacroAssembler::pop_ptr(Register r) {
+ pop(r);
+ }
+
+ void InterpreterMacroAssembler::push_ptr(Register r) {
+ push(r);
+ }
+
+ void InterpreterMacroAssembler::push_i(Register r) {
+ push(r);
+ }
+
+ #ifdef _LP64
+ void InterpreterMacroAssembler::pop_i(Register r) {
+ // XXX can't use pop currently, upper half non clean
+ movl(r, Address(rsp, 0));
+ addptr(rsp, wordSize);
+ }
+
+ void InterpreterMacroAssembler::pop_l(Register r) {
+ movq(r, Address(rsp, 0));
+ addptr(rsp, 2 * Interpreter::stackElementSize);
+ }
+
+ void InterpreterMacroAssembler::pop_f(XMMRegister r) {
+ movflt(r, Address(rsp, 0));
+ addptr(rsp, wordSize);
+ }
+
+ void InterpreterMacroAssembler::pop_d(XMMRegister r) {
+ movdbl(r, Address(rsp, 0));
+ addptr(rsp, 2 * Interpreter::stackElementSize);
+ }
+
+ void InterpreterMacroAssembler::push_l(Register r) {
+ subptr(rsp, 2 * wordSize);
+ movq(Address(rsp, 0), r);
+ }
+
+ void InterpreterMacroAssembler::push_f(XMMRegister r) {
+ subptr(rsp, wordSize);
+ movflt(Address(rsp, 0), r);
+ }
+
+ void InterpreterMacroAssembler::push_d(XMMRegister r) {
+ subptr(rsp, 2 * wordSize);
+ movdbl(Address(rsp, 0), r);
+ }
+
+ void InterpreterMacroAssembler::pop(TosState state) {
+ switch (state) {
+ case atos: pop_ptr(); break;
+ case btos:
+ case ctos:
+ case stos:
+ case itos: pop_i(); break;
+ case ltos: pop_l(); break;
+ case ftos: pop_f(); break;
+ case dtos: pop_d(); break;
+ case vtos: /* nothing to do */ break;
+ default: ShouldNotReachHere();
+ }
+ verify_oop(rax, state);
+ }
+
+ void InterpreterMacroAssembler::push(TosState state) {
+ verify_oop(rax, state);
+ switch (state) {
+ case atos: push_ptr(); break;
+ case btos:
+ case ctos:
+ case stos:
+ case itos: push_i(); break;
+ case ltos: push_l(); break;
+ case ftos: push_f(); break;
+ case dtos: push_d(); break;
+ case vtos: /* nothing to do */ break;
+ default : ShouldNotReachHere();
+ }
+ }
+ #else
+ void InterpreterMacroAssembler::pop_i(Register r) {
+ pop(r);
+ }
+
+ void InterpreterMacroAssembler::pop_l(Register lo, Register hi) {
+ pop(lo);
+ pop(hi);
+ }
+
+ void InterpreterMacroAssembler::pop_f() {
+ fld_s(Address(rsp, 0));
+ addptr(rsp, 1 * wordSize);
+ }
+
+ void InterpreterMacroAssembler::pop_d() {
+ fld_d(Address(rsp, 0));
+ addptr(rsp, 2 * wordSize);
+ }
+
+
+ void InterpreterMacroAssembler::pop(TosState state) {
+ switch (state) {
+ case atos: pop_ptr(rax); break;
+ case btos: // fall through
+ case ctos: // fall through
+ case stos: // fall through
+ case itos: pop_i(rax); break;
+ case ltos: pop_l(rax, rdx); break;
+ case ftos: pop_f(); break;
+ case dtos: pop_d(); break;
+ case vtos: /* nothing to do */ break;
+ default : ShouldNotReachHere();
+ }
+ verify_oop(rax, state);
+ }
+
+
+ void InterpreterMacroAssembler::push_l(Register lo, Register hi) {
+ push(hi);
+ push(lo);
+ }
+
+ void InterpreterMacroAssembler::push_f() {
+ // Do not schedule for no AGI! Never write beyond rsp!
+ subptr(rsp, 1 * wordSize);
+ fstp_s(Address(rsp, 0));
+ }
+
+ void InterpreterMacroAssembler::push_d(Register r) {
+ // Do not schedule for no AGI! Never write beyond rsp!
+ subptr(rsp, 2 * wordSize);
+ fstp_d(Address(rsp, 0));
+ }
+
+
+ void InterpreterMacroAssembler::push(TosState state) {
+ verify_oop(rax, state);
+ switch (state) {
+ case atos: push_ptr(rax); break;
+ case btos: // fall through
+ case ctos: // fall through
+ case stos: // fall through
+ case itos: push_i(rax); break;
+ case ltos: push_l(rax, rdx); break;
+ case ftos: push_f(); break;
+ case dtos: push_d(rax); break;
+ case vtos: /* nothing to do */ break;
+ default : ShouldNotReachHere();
+ }
+ }
+ #endif // _LP64
+
+
+ // Helpers for swap and dup
+ void InterpreterMacroAssembler::load_ptr(int n, Register val) {
+ movptr(val, Address(rsp, Interpreter::expr_offset_in_bytes(n)));
+ }
+
+ void InterpreterMacroAssembler::store_ptr(int n, Register val) {
+ movptr(Address(rsp, Interpreter::expr_offset_in_bytes(n)), val);
+ }
+
+
+ void InterpreterMacroAssembler::prepare_to_jump_from_interpreted() {
+ // set sender sp
+ lea(_bcp_register, Address(rsp, wordSize));
+ // record last_sp
+ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), _bcp_register);
+ }
+
+
+ // Jump to from_interpreted entry of a call unless single stepping is possible
+ // in this thread in which case we must call the i2i entry
+ void InterpreterMacroAssembler::jump_from_interpreted(Register method, Register temp) {
+ prepare_to_jump_from_interpreted();
+
+ if (JvmtiExport::can_post_interpreter_events()) {
+ Label run_compiled_code;
+ // JVMTI events, such as single-stepping, are implemented partly by avoiding running
+ // compiled code in threads for which the event is enabled. Check here for
+ // interp_only_mode if these events CAN be enabled.
+ // interp_only is an int, on little endian it is sufficient to test the byte only
+ // Is a cmpl faster?
+ LP64_ONLY(temp = r15_thread;)
+ NOT_LP64(get_thread(temp);)
+ cmpb(Address(temp, JavaThread::interp_only_mode_offset()), 0);
+ jccb(Assembler::zero, run_compiled_code);
+ jmp(Address(method, Method::interpreter_entry_offset()));
+ bind(run_compiled_code);
+ }
+
+ jmp(Address(method, Method::from_interpreted_offset()));
+ }
+
+ // The following two routines provide a hook so that an implementation
+ // can schedule the dispatch in two parts. x86 does not do this.
+ void InterpreterMacroAssembler::dispatch_prolog(TosState state, int step) {
+ // Nothing x86 specific to be done here
+ }
+
+ void InterpreterMacroAssembler::dispatch_epilog(TosState state, int step) {
+ dispatch_next(state, step);
+ }
+
+ void InterpreterMacroAssembler::dispatch_base(TosState state,
+ address* table,
+ bool verifyoop) {
+ verify_FPU(1, state);
+ if (VerifyActivationFrameSize) {
+ Label L;
+ mov(rcx, rbp);
+ subptr(rcx, rsp);
+ int32_t min_frame_size =
+ (frame::link_offset - frame::interpreter_frame_initial_sp_offset) *
+ wordSize;
+ cmpptr(rcx, (int32_t)min_frame_size);
+ jcc(Assembler::greaterEqual, L);
+ stop("broken stack frame");
+ bind(L);
+ }
+ if (verifyoop) {
+ verify_oop(rax, state);
+ }
+ #ifdef _LP64
+ lea(rscratch1, ExternalAddress((address)table));
+ jmp(Address(rscratch1, rbx, Address::times_8));
+ #else
+ Address index(noreg, rbx, Address::times_ptr);
+ ExternalAddress tbl((address)table);
+ ArrayAddress dispatch(tbl, index);
+ jump(dispatch);
+ #endif // _LP64
+ }
+
+ void InterpreterMacroAssembler::dispatch_only(TosState state) {
+ dispatch_base(state, Interpreter::dispatch_table(state));
+ }
+
+ void InterpreterMacroAssembler::dispatch_only_normal(TosState state) {
+ dispatch_base(state, Interpreter::normal_table(state));
+ }
+
+ void InterpreterMacroAssembler::dispatch_only_noverify(TosState state) {
+ dispatch_base(state, Interpreter::normal_table(state), false);
+ }
+
+
+ void InterpreterMacroAssembler::dispatch_next(TosState state, int step) {
+ // load next bytecode (load before advancing _bcp_register to prevent AGI)
+ load_unsigned_byte(rbx, Address(_bcp_register, step));
+ // advance _bcp_register
+ increment(_bcp_register, step);
+ dispatch_base(state, Interpreter::dispatch_table(state));
+ }
+
+ void InterpreterMacroAssembler::dispatch_via(TosState state, address* table) {
+ // load current bytecode
+ load_unsigned_byte(rbx, Address(_bcp_register, 0));
+ dispatch_base(state, table);
+ }
+
+ // remove activation
+ //
+ // Unlock the receiver if this is a synchronized method.
+ // Unlock any Java monitors from syncronized blocks.
+ // Remove the activation from the stack.
+ //
+ // If there are locked Java monitors
+ // If throw_monitor_exception
+ // throws IllegalMonitorStateException
+ // Else if install_monitor_exception
+ // installs IllegalMonitorStateException
+ // Else
+ // no error processing
+ void InterpreterMacroAssembler::remove_activation(
+ TosState state,
+ Register ret_addr,
+ bool throw_monitor_exception,
+ bool install_monitor_exception,
+ bool notify_jvmdi) {
+ // Note: Registers rdx xmm0 may be in use for the
+ // result check if synchronized method
+ Label unlocked, unlock, no_unlock;
+
+ const Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
+ const Register robj = LP64_ONLY(c_rarg1) NOT_LP64(rdx);
+ const Register rmon = LP64_ONLY(c_rarg1) NOT_LP64(rcx);
+ // monitor pointers need different register
+ // because rdx may have the result in it
+ NOT_LP64(get_thread(rcx);)
+
+ // get the value of _do_not_unlock_if_synchronized into rdx
+ const Address do_not_unlock_if_synchronized(rthread,
+ in_bytes(JavaThread::do_not_unlock_if_synchronized_offset()));
+ movbool(rbx, do_not_unlock_if_synchronized);
+ movbool(do_not_unlock_if_synchronized, false); // reset the flag
+
+ // get method access flags
+ movptr(rcx, Address(rbp, frame::interpreter_frame_method_offset * wordSize));
+ movl(rcx, Address(rcx, Method::access_flags_offset()));
+ testl(rcx, JVM_ACC_SYNCHRONIZED);
+ jcc(Assembler::zero, unlocked);
+
+ // Don't unlock anything if the _do_not_unlock_if_synchronized flag
+ // is set.
+ testbool(rbx);
+ jcc(Assembler::notZero, no_unlock);
+
+ // unlock monitor
+ push(state); // save result
+
+ // 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, frame::interpreter_frame_initial_sp_offset *
+ wordSize - (int) sizeof(BasicObjectLock));
+ // We use c_rarg1/rdx so that if we go slow path it will be the correct
+ // register for unlock_object to pass to VM directly
+ lea(robj, monitor); // address of first monitor
+
+ movptr(rax, Address(robj, BasicObjectLock::obj_offset_in_bytes()));
+ testptr(rax, rax);
+ jcc(Assembler::notZero, unlock);
+
+ pop(state);
+ if (throw_monitor_exception) {
+ // Entry already unlocked, need to throw exception
+ NOT_LP64(empty_FPU_stack();) // remove possible return value from FPU-stack, otherwise stack could overflow
+ call_VM(noreg, CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::throw_illegal_monitor_state_exception));
+ should_not_reach_here();
+ } else {
+ // Monitor already unlocked during a stack unroll. If requested,
+ // install an illegal_monitor_state_exception. Continue with
+ // stack unrolling.
+ if (install_monitor_exception) {
+ NOT_LP64(empty_FPU_stack();)
+ call_VM(noreg, CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::new_illegal_monitor_state_exception));
+ }
+ jmp(unlocked);
+ }
+
+ bind(unlock);
+ unlock_object(robj);
+ pop(state);
+
+ // Check that for block-structured locking (i.e., that all locked
+ // objects has been unlocked)
+ bind(unlocked);
+
+ // rax, rdx: Might contain return value
+
+ // Check that all monitors are unlocked
+ {
+ Label loop, exception, entry, restart;
+ const int entry_size = frame::interpreter_frame_monitor_size() * wordSize;
+ const Address monitor_block_top(
+ rbp, frame::interpreter_frame_monitor_block_top_offset * wordSize);
+ const Address monitor_block_bot(
+ rbp, frame::interpreter_frame_initial_sp_offset * wordSize);
+
+ bind(restart);
+ // We use c_rarg1 so that if we go slow path it will be the correct
+ // register for unlock_object to pass to VM directly
+ movptr(rmon, monitor_block_top); // points to current entry, starting
+ // with top-most entry
+ lea(rbx, monitor_block_bot); // points to word before bottom of
+ // monitor block
+ jmp(entry);
+
+ // Entry already locked, need to throw exception
+ bind(exception);
+
+ if (throw_monitor_exception) {
+ // Throw exception
+ NOT_LP64(empty_FPU_stack();)
+ MacroAssembler::call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::
+ throw_illegal_monitor_state_exception));
+ should_not_reach_here();
+ } else {
+ // Stack unrolling. Unlock object and install illegal_monitor_exception.
+ // Unlock does not block, so don't have to worry about the frame.
+ // We don't have to preserve c_rarg1 since we are going to throw an exception.
+
+ push(state);
+ mov(robj, rmon); // nop if robj and rmon are the same
+ unlock_object(robj);
+ pop(state);
+
+ if (install_monitor_exception) {
+ NOT_LP64(empty_FPU_stack();)
+ call_VM(noreg, CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::
+ new_illegal_monitor_state_exception));
+ }
+
+ jmp(restart);
+ }
+
+ bind(loop);
+ // check if current entry is used
+ cmpptr(Address(rmon, BasicObjectLock::obj_offset_in_bytes()), (int32_t) NULL);
+ jcc(Assembler::notEqual, exception);
+
+ addptr(rmon, entry_size); // otherwise advance to next entry
+ bind(entry);
+ cmpptr(rmon, rbx); // check if bottom reached
+ jcc(Assembler::notEqual, loop); // if not at bottom then check this entry
+ }
+
+ bind(no_unlock);
+
+ // jvmti support
+ if (notify_jvmdi) {
+ notify_method_exit(state, NotifyJVMTI); // preserve TOSCA
+ } else {
+ notify_method_exit(state, SkipNotifyJVMTI); // preserve TOSCA
+ }
+
+ // remove activation
+ // get sender sp
+ movptr(rbx,
+ Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize));
+ leave(); // remove frame anchor
+ pop(ret_addr); // get return address
+ mov(rsp, rbx); // set sp to sender sp
+ #ifndef _LP64
+ if (UseSSE) {
+ // float and double are returned in xmm register in SSE-mode
+ if (state == ftos && UseSSE >= 1) {
+ subptr(rsp, wordSize);
+ fstp_s(Address(rsp, 0));
+ movflt(xmm0, Address(rsp, 0));
+ addptr(rsp, wordSize);
+ } else if (state == dtos && UseSSE >= 2) {
+ subptr(rsp, 2*wordSize);
+ fstp_d(Address(rsp, 0));
+ movdbl(xmm0, Address(rsp, 0));
+ addptr(rsp, 2*wordSize);
+ }
+ }
+ #endif // _LP64
+ }
+ #endif /* !CC_INTERP */
+
+ void InterpreterMacroAssembler::get_method_counters(Register method,
+ Register mcs, Label& skip) {
+ Label has_counters;
+ movptr(mcs, Address(method, Method::method_counters_offset()));
+ testptr(mcs, mcs);
+ jcc(Assembler::notZero, has_counters);
+ call_VM(noreg, CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::build_method_counters), method);
+ movptr(mcs, Address(method,Method::method_counters_offset()));
+ testptr(mcs, mcs);
+ jcc(Assembler::zero, skip); // No MethodCounters allocated, OutOfMemory
+ bind(has_counters);
+ }
+
+
+ // Lock object
+ //
+ // Args:
+ // rdx, c_rarg1: BasicObjectLock to be used for locking
+ //
+ // Kills:
+ // rax
+ // rscratch1 (scratch regs)
+ void InterpreterMacroAssembler::lock_object(Register lock_reg) {
+ assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
+ "The argument is only for looks. It must be c_rarg1");
+
+ if (UseHeavyMonitors) {
+ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
+ lock_reg);
+ } else {
+ Label done;
+
+ const Register swap_reg = rax; // Must use rax for cmpxchg instruction
+ const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
+
+ const int obj_offset = BasicObjectLock::obj_offset_in_bytes();
+ const int lock_offset = BasicObjectLock::lock_offset_in_bytes ();
+ const int mark_offset = lock_offset +
+ BasicLock::displaced_header_offset_in_bytes();
+
+ Label slow_case;
+
+ // Load object pointer into obj_reg
+ movptr(obj_reg, Address(lock_reg, obj_offset));
+
+ if (UseBiasedLocking) {
+ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, done, &slow_case);
+ }
+
+ // Load immediate 1 into swap_reg %rax
+ movl(swap_reg, (int32_t)1);
+
+ // Load (object->mark() | 1) into swap_reg %rax
+ orptr(swap_reg, Address(obj_reg, 0));
+
+ // Save (object->mark() | 1) into BasicLock's displaced header
+ movptr(Address(lock_reg, mark_offset), swap_reg);
+
+ assert(lock_offset == 0,
+ "displached header must be first word in BasicObjectLock");
+
+ if (os::is_MP()) lock();
+ cmpxchgptr(lock_reg, Address(obj_reg, 0));
+ if (PrintBiasedLockingStatistics) {
+ cond_inc32(Assembler::zero,
+ ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
+ }
+ jcc(Assembler::zero, done);
+
+ const int zero_bits = LP64_ONLY(7) NOT_LP64(3);
+
+ // Test if the oopMark is an obvious stack pointer, i.e.,
+ // 1) (mark & zero_bits) == 0, and
+ // 2) rsp <= mark < mark + os::pagesize()
+ //
+ // These 3 tests can be done by evaluating the following
+ // expression: ((mark - rsp) & (zero_bits - os::vm_page_size())),
+ // assuming both stack pointer and pagesize have their
+ // least significant bits clear.
+ // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg
+ subptr(swap_reg, rsp);
+ andptr(swap_reg, zero_bits - os::vm_page_size());
+
+ // Save the test result, for recursive case, the result is zero
+ movptr(Address(lock_reg, mark_offset), swap_reg);
+
+ if (PrintBiasedLockingStatistics) {
+ cond_inc32(Assembler::zero,
+ ExternalAddress((address) BiasedLocking::fast_path_entry_count_addr()));
+ }
+ jcc(Assembler::zero, done);
+
+ bind(slow_case);
+
+ // Call the runtime routine for slow case
+ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorenter),
+ lock_reg);
+
+ bind(done);
+ }
+ }
+
+
+ // Unlocks an object. Used in monitorexit bytecode and
+ // remove_activation. Throws an IllegalMonitorException if object is
+ // not locked by current thread.
+ //
+ // Args:
+ // rdx, c_rarg1: BasicObjectLock for lock
+ //
+ // Kills:
+ // rax
+ // c_rarg0, c_rarg1, c_rarg2, c_rarg3, ... (param regs)
+ // rscratch1, rscratch2 (scratch regs)
+ // rax, rbx, rcx, rdx
+ void InterpreterMacroAssembler::unlock_object(Register lock_reg) {
+ assert(lock_reg == LP64_ONLY(c_rarg1) NOT_LP64(rdx),
+ "The argument is only for looks. It must be c_rarg1");
+
+ if (UseHeavyMonitors) {
+ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
+ lock_reg);
+ } else {
+ Label done;
+
+ const Register swap_reg = rax; // Must use rax for cmpxchg instruction
+ const Register header_reg = LP64_ONLY(c_rarg2) NOT_LP64(rbx); // Will contain the old oopMark
+ const Register obj_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx); // Will contain the oop
+
+ save_bcp(); // Save in case of exception
+
+ // Convert from BasicObjectLock structure to object and BasicLock
+ // structure Store the BasicLock address into %rax
+ lea(swap_reg, Address(lock_reg, BasicObjectLock::lock_offset_in_bytes()));
+
+ // Load oop into obj_reg(%c_rarg3)
+ movptr(obj_reg, Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()));
+
+ // Free entry
+ movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()), (int32_t)NULL_WORD);
+
+ if (UseBiasedLocking) {
+ biased_locking_exit(obj_reg, header_reg, done);
+ }
+
+ // Load the old header from BasicLock structure
+ movptr(header_reg, Address(swap_reg,
+ BasicLock::displaced_header_offset_in_bytes()));
+
+ // Test for recursion
+ testptr(header_reg, header_reg);
+
+ // zero for recursive case
+ jcc(Assembler::zero, done);
+
+ // Atomic swap back the old header
+ if (os::is_MP()) lock();
+ cmpxchgptr(header_reg, Address(obj_reg, 0));
+
+ // zero for recursive case
+ jcc(Assembler::zero, done);
+
+ // Call the runtime routine for slow case.
+ movptr(Address(lock_reg, BasicObjectLock::obj_offset_in_bytes()),
+ obj_reg); // restore obj
+ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::monitorexit),
+ lock_reg);
+
+ bind(done);
+
+ restore_bcp();
+ }
+ }
+ #ifndef CC_INTERP
+ void InterpreterMacroAssembler::test_method_data_pointer(Register mdp,
+ Label& zero_continue) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ movptr(mdp, Address(rbp, frame::interpreter_frame_mdp_offset * wordSize));
+ testptr(mdp, mdp);
+ jcc(Assembler::zero, zero_continue);
+ }
+
+
+ // Set the method data pointer for the current bcp.
+ void InterpreterMacroAssembler::set_method_data_pointer_for_bcp() {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ Label set_mdp;
+ push(rax);
+ push(rbx);
+
+ get_method(rbx);
+ // Test MDO to avoid the call if it is NULL.
+ movptr(rax, Address(rbx, in_bytes(Method::method_data_offset())));
+ testptr(rax, rax);
+ jcc(Assembler::zero, set_mdp);
+ // rbx: method
+ // _bcp_register: bcp
+ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::bcp_to_di), rbx, _bcp_register);
+ // rax: mdi
+ // mdo is guaranteed to be non-zero here, we checked for it before the call.
+ movptr(rbx, Address(rbx, in_bytes(Method::method_data_offset())));
+ addptr(rbx, in_bytes(MethodData::data_offset()));
+ addptr(rax, rbx);
+ bind(set_mdp);
+ movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), rax);
+ pop(rbx);
+ pop(rax);
+ }
+
+ void InterpreterMacroAssembler::verify_method_data_pointer() {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ #ifdef ASSERT
+ Label verify_continue;
+ push(rax);
+ push(rbx);
+ Register arg3_reg = LP64_ONLY(c_rarg3) NOT_LP64(rcx);
+ Register arg2_reg = LP64_ONLY(c_rarg2) NOT_LP64(rdx);
+ push(arg3_reg);
+ push(arg2_reg);
+ test_method_data_pointer(arg3_reg, verify_continue); // If mdp is zero, continue
+ get_method(rbx);
+
+ // If the mdp is valid, it will point to a DataLayout header which is
+ // consistent with the bcp. The converse is highly probable also.
+ load_unsigned_short(arg2_reg,
+ Address(arg3_reg, in_bytes(DataLayout::bci_offset())));
+ addptr(arg2_reg, Address(rbx, Method::const_offset()));
+ lea(arg2_reg, Address(arg2_reg, ConstMethod::codes_offset()));
+ cmpptr(arg2_reg, _bcp_register);
+ jcc(Assembler::equal, verify_continue);
+ // rbx: method
+ // _bcp_register: bcp
+ // c_rarg3: mdp
+ call_VM_leaf(CAST_FROM_FN_PTR(address, InterpreterRuntime::verify_mdp),
+ rbx, _bcp_register, arg3_reg);
+ bind(verify_continue);
+ pop(arg2_reg);
+ pop(arg3_reg);
+ pop(rbx);
+ pop(rax);
+ #endif // ASSERT
+ }
+
+
+ void InterpreterMacroAssembler::set_mdp_data_at(Register mdp_in,
+ int constant,
+ Register value) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ Address data(mdp_in, constant);
+ movptr(data, value);
+ }
+
+
+ void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
+ int constant,
+ bool decrement) {
+ // Counter address
+ Address data(mdp_in, constant);
+
+ increment_mdp_data_at(data, decrement);
+ }
+
+ void InterpreterMacroAssembler::increment_mdp_data_at(Address data,
+ bool decrement) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ // %%% this does 64bit counters at best it is wasting space
+ // at worst it is a rare bug when counters overflow
+
+ if (decrement) {
+ // Decrement the register. Set condition codes.
+ addptr(data, (int32_t) -DataLayout::counter_increment);
+ // If the decrement causes the counter to overflow, stay negative
+ Label L;
+ jcc(Assembler::negative, L);
+ addptr(data, (int32_t) DataLayout::counter_increment);
+ bind(L);
+ } else {
+ assert(DataLayout::counter_increment == 1,
+ "flow-free idiom only works with 1");
+ // Increment the register. Set carry flag.
+ addptr(data, DataLayout::counter_increment);
+ // If the increment causes the counter to overflow, pull back by 1.
+ sbbptr(data, (int32_t)0);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::increment_mdp_data_at(Register mdp_in,
+ Register reg,
+ int constant,
+ bool decrement) {
+ Address data(mdp_in, reg, Address::times_1, constant);
+
+ increment_mdp_data_at(data, decrement);
+ }
+
+ void InterpreterMacroAssembler::set_mdp_flag_at(Register mdp_in,
+ int flag_byte_constant) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ int header_offset = in_bytes(DataLayout::header_offset());
+ int header_bits = DataLayout::flag_mask_to_header_mask(flag_byte_constant);
+ // Set the flag
+ orl(Address(mdp_in, header_offset), header_bits);
+ }
+
+
+
+ void InterpreterMacroAssembler::test_mdp_data_at(Register mdp_in,
+ int offset,
+ Register value,
+ Register test_value_out,
+ Label& not_equal_continue) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ if (test_value_out == noreg) {
+ cmpptr(value, Address(mdp_in, offset));
+ } else {
+ // Put the test value into a register, so caller can use it:
+ movptr(test_value_out, Address(mdp_in, offset));
+ cmpptr(test_value_out, value);
+ }
+ jcc(Assembler::notEqual, not_equal_continue);
+ }
+
+
+ void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
+ int offset_of_disp) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ Address disp_address(mdp_in, offset_of_disp);
+ addptr(mdp_in, disp_address);
+ movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
+ }
+
+
+ void InterpreterMacroAssembler::update_mdp_by_offset(Register mdp_in,
+ Register reg,
+ int offset_of_disp) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ Address disp_address(mdp_in, reg, Address::times_1, offset_of_disp);
+ addptr(mdp_in, disp_address);
+ movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
+ }
+
+
+ void InterpreterMacroAssembler::update_mdp_by_constant(Register mdp_in,
+ int constant) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ addptr(mdp_in, constant);
+ movptr(Address(rbp, frame::interpreter_frame_mdp_offset * wordSize), mdp_in);
+ }
+
+
+ void InterpreterMacroAssembler::update_mdp_for_ret(Register return_bci) {
+ assert(ProfileInterpreter, "must be profiling interpreter");
+ push(return_bci); // save/restore across call_VM
+ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::update_mdp_for_ret),
+ return_bci);
+ pop(return_bci);
+ }
+
+
+ void InterpreterMacroAssembler::profile_taken_branch(Register mdp,
+ Register bumped_count) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ // Otherwise, assign to mdp
+ test_method_data_pointer(mdp, profile_continue);
+
+ // We are taking a branch. Increment the taken count.
+ // We inline increment_mdp_data_at to return bumped_count in a register
+ //increment_mdp_data_at(mdp, in_bytes(JumpData::taken_offset()));
+ Address data(mdp, in_bytes(JumpData::taken_offset()));
+ movptr(bumped_count, data);
+ assert(DataLayout::counter_increment == 1,
+ "flow-free idiom only works with 1");
+ addptr(bumped_count, DataLayout::counter_increment);
+ sbbptr(bumped_count, 0);
+ movptr(data, bumped_count); // Store back out
+
+ // The method data pointer needs to be updated to reflect the new target.
+ update_mdp_by_offset(mdp, in_bytes(JumpData::displacement_offset()));
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_not_taken_branch(Register mdp) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // We are taking a branch. Increment the not taken count.
+ increment_mdp_data_at(mdp, in_bytes(BranchData::not_taken_offset()));
+
+ // The method data pointer needs to be updated to correspond to
+ // the next bytecode
+ update_mdp_by_constant(mdp, in_bytes(BranchData::branch_data_size()));
+ bind(profile_continue);
+ }
+ }
+
+ void InterpreterMacroAssembler::profile_call(Register mdp) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // We are making a call. Increment the count.
+ increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
+
+ // The method data pointer needs to be updated to reflect the new target.
+ update_mdp_by_constant(mdp, in_bytes(CounterData::counter_data_size()));
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_final_call(Register mdp) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // We are making a call. Increment the count.
+ increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
+
+ // The method data pointer needs to be updated to reflect the new target.
+ update_mdp_by_constant(mdp,
+ in_bytes(VirtualCallData::
+ virtual_call_data_size()));
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_virtual_call(Register receiver,
+ Register mdp,
+ Register reg2,
+ bool receiver_can_be_null) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ Label skip_receiver_profile;
+ if (receiver_can_be_null) {
+ Label not_null;
+ testptr(receiver, receiver);
+ jccb(Assembler::notZero, not_null);
+ // We are making a call. Increment the count for null receiver.
+ increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
+ jmp(skip_receiver_profile);
+ bind(not_null);
+ }
+
+ // Record the receiver type.
+ record_klass_in_profile(receiver, mdp, reg2, true);
+ bind(skip_receiver_profile);
+
+ // The method data pointer needs to be updated to reflect the new target.
+ update_mdp_by_constant(mdp,
+ in_bytes(VirtualCallData::
+ virtual_call_data_size()));
+ bind(profile_continue);
+ }
+ }
+
+ // This routine creates a state machine for updating the multi-row
+ // type profile at a virtual call site (or other type-sensitive bytecode).
+ // The machine visits each row (of receiver/count) until the receiver type
+ // is found, or until it runs out of rows. At the same time, it remembers
+ // the location of the first empty row. (An empty row records null for its
+ // receiver, and can be allocated for a newly-observed receiver type.)
+ // Because there are two degrees of freedom in the state, a simple linear
+ // search will not work; it must be a decision tree. Hence this helper
+ // function is recursive, to generate the required tree structured code.
+ // It's the interpreter, so we are trading off code space for speed.
+ // See below for example code.
+ void InterpreterMacroAssembler::record_klass_in_profile_helper(
+ Register receiver, Register mdp,
+ Register reg2, int start_row,
+ Label& done, bool is_virtual_call) {
+ if (TypeProfileWidth == 0) {
+ if (is_virtual_call) {
+ increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
+ }
+ return;
+ }
+
+ int last_row = VirtualCallData::row_limit() - 1;
+ assert(start_row <= last_row, "must be work left to do");
+ // Test this row for both the receiver and for null.
+ // Take any of three different outcomes:
+ // 1. found receiver => increment count and goto done
+ // 2. found null => keep looking for case 1, maybe allocate this cell
+ // 3. found something else => keep looking for cases 1 and 2
+ // Case 3 is handled by a recursive call.
+ for (int row = start_row; row <= last_row; row++) {
+ Label next_test;
+ bool test_for_null_also = (row == start_row);
+
+ // See if the receiver is receiver[n].
+ int recvr_offset = in_bytes(VirtualCallData::receiver_offset(row));
+ test_mdp_data_at(mdp, recvr_offset, receiver,
+ (test_for_null_also ? reg2 : noreg),
+ next_test);
+ // (Reg2 now contains the receiver from the CallData.)
+
+ // The receiver is receiver[n]. Increment count[n].
+ int count_offset = in_bytes(VirtualCallData::receiver_count_offset(row));
+ increment_mdp_data_at(mdp, count_offset);
+ jmp(done);
+ bind(next_test);
+
+ if (test_for_null_also) {
+ Label found_null;
+ // Failed the equality check on receiver[n]... Test for null.
+ testptr(reg2, reg2);
+ if (start_row == last_row) {
+ // The only thing left to do is handle the null case.
+ if (is_virtual_call) {
+ jccb(Assembler::zero, found_null);
+ // Receiver did not match any saved receiver and there is no empty row for it.
+ // Increment total counter to indicate polymorphic case.
+ increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
+ jmp(done);
+ bind(found_null);
+ } else {
+ jcc(Assembler::notZero, done);
+ }
+ break;
+ }
+ // Since null is rare, make it be the branch-taken case.
+ jcc(Assembler::zero, found_null);
+
+ // Put all the "Case 3" tests here.
+ record_klass_in_profile_helper(receiver, mdp, reg2, start_row + 1, done, is_virtual_call);
+
+ // Found a null. Keep searching for a matching receiver,
+ // but remember that this is an empty (unused) slot.
+ bind(found_null);
+ }
+ }
+
+ // In the fall-through case, we found no matching receiver, but we
+ // observed the receiver[start_row] is NULL.
+
+ // Fill in the receiver field and increment the count.
+ int recvr_offset = in_bytes(VirtualCallData::receiver_offset(start_row));
+ set_mdp_data_at(mdp, recvr_offset, receiver);
+ int count_offset = in_bytes(VirtualCallData::receiver_count_offset(start_row));
+ movl(reg2, DataLayout::counter_increment);
+ set_mdp_data_at(mdp, count_offset, reg2);
+ if (start_row > 0) {
+ jmp(done);
+ }
+ }
+
+ // Example state machine code for three profile rows:
+ // // main copy of decision tree, rooted at row[1]
+ // if (row[0].rec == rec) { row[0].incr(); goto done; }
+ // if (row[0].rec != NULL) {
+ // // inner copy of decision tree, rooted at row[1]
+ // if (row[1].rec == rec) { row[1].incr(); goto done; }
+ // if (row[1].rec != NULL) {
+ // // degenerate decision tree, rooted at row[2]
+ // if (row[2].rec == rec) { row[2].incr(); goto done; }
+ // if (row[2].rec != NULL) { count.incr(); goto done; } // overflow
+ // row[2].init(rec); goto done;
+ // } else {
+ // // remember row[1] is empty
+ // if (row[2].rec == rec) { row[2].incr(); goto done; }
+ // row[1].init(rec); goto done;
+ // }
+ // } else {
+ // // remember row[0] is empty
+ // if (row[1].rec == rec) { row[1].incr(); goto done; }
+ // if (row[2].rec == rec) { row[2].incr(); goto done; }
+ // row[0].init(rec); goto done;
+ // }
+ // done:
+
+ void InterpreterMacroAssembler::record_klass_in_profile(Register receiver,
+ Register mdp, Register reg2,
+ bool is_virtual_call) {
+ assert(ProfileInterpreter, "must be profiling");
+ Label done;
+
+ record_klass_in_profile_helper(receiver, mdp, reg2, 0, done, is_virtual_call);
+
+ bind (done);
+ }
+
+ void InterpreterMacroAssembler::profile_ret(Register return_bci,
+ Register mdp) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+ uint row;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // Update the total ret count.
+ increment_mdp_data_at(mdp, in_bytes(CounterData::count_offset()));
+
+ for (row = 0; row < RetData::row_limit(); row++) {
+ Label next_test;
+
+ // See if return_bci is equal to bci[n]:
+ test_mdp_data_at(mdp,
+ in_bytes(RetData::bci_offset(row)),
+ return_bci, noreg,
+ next_test);
+
+ // return_bci is equal to bci[n]. Increment the count.
+ increment_mdp_data_at(mdp, in_bytes(RetData::bci_count_offset(row)));
+
+ // The method data pointer needs to be updated to reflect the new target.
+ update_mdp_by_offset(mdp,
+ in_bytes(RetData::bci_displacement_offset(row)));
+ jmp(profile_continue);
+ bind(next_test);
+ }
+
+ update_mdp_for_ret(return_bci);
+
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_null_seen(Register mdp) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ set_mdp_flag_at(mdp, BitData::null_seen_byte_constant());
+
+ // The method data pointer needs to be updated.
+ int mdp_delta = in_bytes(BitData::bit_data_size());
+ if (TypeProfileCasts) {
+ mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
+ }
+ update_mdp_by_constant(mdp, mdp_delta);
+
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_typecheck_failed(Register mdp) {
+ if (ProfileInterpreter && TypeProfileCasts) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ int count_offset = in_bytes(CounterData::count_offset());
+ // Back up the address, since we have already bumped the mdp.
+ count_offset -= in_bytes(VirtualCallData::virtual_call_data_size());
+
+ // *Decrement* the counter. We expect to see zero or small negatives.
+ increment_mdp_data_at(mdp, count_offset, true);
+
+ bind (profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_typecheck(Register mdp, Register klass, Register reg2) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // The method data pointer needs to be updated.
+ int mdp_delta = in_bytes(BitData::bit_data_size());
+ if (TypeProfileCasts) {
+ mdp_delta = in_bytes(VirtualCallData::virtual_call_data_size());
+
+ // Record the object type.
+ record_klass_in_profile(klass, mdp, reg2, false);
+ NOT_LP64(assert(reg2 == rdi, "we know how to fix this blown reg");)
+ NOT_LP64(restore_locals();) // Restore EDI
+ }
+ update_mdp_by_constant(mdp, mdp_delta);
+
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_switch_default(Register mdp) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // Update the default case count
+ increment_mdp_data_at(mdp,
+ in_bytes(MultiBranchData::default_count_offset()));
+
+ // The method data pointer needs to be updated.
+ update_mdp_by_offset(mdp,
+ in_bytes(MultiBranchData::
+ default_displacement_offset()));
+
+ bind(profile_continue);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::profile_switch_case(Register index,
+ Register mdp,
+ Register reg2) {
+ if (ProfileInterpreter) {
+ Label profile_continue;
+
+ // If no method data exists, go to profile_continue.
+ test_method_data_pointer(mdp, profile_continue);
+
+ // Build the base (index * per_case_size_in_bytes()) +
+ // case_array_offset_in_bytes()
+ movl(reg2, in_bytes(MultiBranchData::per_case_size()));
+ imulptr(index, reg2); // XXX l ?
+ addptr(index, in_bytes(MultiBranchData::case_array_offset())); // XXX l ?
+
+ // Update the case count
+ increment_mdp_data_at(mdp,
+ index,
+ in_bytes(MultiBranchData::relative_count_offset()));
+
+ // The method data pointer needs to be updated.
+ update_mdp_by_offset(mdp,
+ index,
+ in_bytes(MultiBranchData::
+ relative_displacement_offset()));
+
+ bind(profile_continue);
+ }
+ }
+
+
+
+ void InterpreterMacroAssembler::verify_oop(Register reg, TosState state) {
+ if (state == atos) {
+ MacroAssembler::verify_oop(reg);
+ }
+ }
+
+ void InterpreterMacroAssembler::verify_FPU(int stack_depth, TosState state) {
+ #ifndef _LP64
+ if (state == ftos || state == dtos) MacroAssembler::verify_FPU(stack_depth);
+ #endif
+ }
+
+ // Jump if ((*counter_addr += increment) & mask) satisfies the condition.
+ void InterpreterMacroAssembler::increment_mask_and_jump(Address counter_addr,
+ int increment, Address mask,
+ Register scratch, bool preloaded,
+ Condition cond, Label* where) {
+ if (!preloaded) {
+ movl(scratch, counter_addr);
+ }
+ incrementl(scratch, increment);
+ movl(counter_addr, scratch);
+ andl(scratch, mask);
+ jcc(cond, *where);
+ }
+ #endif /* CC_INTERP */
+
+ void InterpreterMacroAssembler::notify_method_entry() {
+ // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
+ // track stack depth. If it is possible to enter interp_only_mode we add
+ // the code to check if the event should be sent.
+ Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
+ Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
+ if (JvmtiExport::can_post_interpreter_events()) {
+ Label L;
+ NOT_LP64(get_thread(rthread);)
+ movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
+ testl(rdx, rdx);
+ jcc(Assembler::zero, L);
+ call_VM(noreg, CAST_FROM_FN_PTR(address,
+ InterpreterRuntime::post_method_entry));
+ bind(L);
+ }
+
+ {
+ SkipIfEqual skip(this, &DTraceMethodProbes, false);
+ NOT_LP64(get_thread(rthread);)
+ get_method(rarg);
+ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry),
+ rthread, rarg);
+ }
+
+ // RedefineClasses() tracing support for obsolete method entry
+ if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) {
+ NOT_LP64(get_thread(rthread);)
+ get_method(rarg);
+ call_VM_leaf(
+ CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry),
+ rthread, rarg);
+ }
+ }
+
+
+ void InterpreterMacroAssembler::notify_method_exit(
+ TosState state, NotifyMethodExitMode mode) {
+ // Whenever JVMTI is interp_only_mode, method entry/exit events are sent to
+ // track stack depth. If it is possible to enter interp_only_mode we add
+ // the code to check if the event should be sent.
+ Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rcx);
+ Register rarg = LP64_ONLY(c_rarg1) NOT_LP64(rbx);
+ if (mode == NotifyJVMTI && JvmtiExport::can_post_interpreter_events()) {
+ Label L;
+ // Note: frame::interpreter_frame_result has a dependency on how the
+ // method result is saved across the call to post_method_exit. If this
+ // is changed then the interpreter_frame_result implementation will
+ // need to be updated too.
+
+ // For c++ interpreter the result is always stored at a known location in the frame
+ // template interpreter will leave it on the top of the stack.
+ NOT_CC_INTERP(push(state);)
+ get_thread(rthread);
+ movl(rdx, Address(rthread, JavaThread::interp_only_mode_offset()));
+ testl(rdx, rdx);
+ jcc(Assembler::zero, L);
+ call_VM(noreg,
+ CAST_FROM_FN_PTR(address, InterpreterRuntime::post_method_exit));
+ bind(L);
+ NOT_CC_INTERP(pop(state));
+ }
+
+ {
+ SkipIfEqual skip(this, &DTraceMethodProbes, false);
+ NOT_CC_INTERP(push(state));
+ get_thread(rthread);
+ get_method(rarg);
+ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit),
+ rthread, rarg);
+ NOT_CC_INTERP(pop(state));
+ }
+ }
src/cpu/x86/vm/interp_masm_x86.cpp
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