/* * Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved. * Copyright 2012, 2014 SAP AG. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "interpreter/interpreter.hpp" #include "memory/resourceArea.hpp" #include "oops/markOop.hpp" #include "oops/method.hpp" #include "oops/oop.inline.hpp" #include "runtime/frame.inline.hpp" #include "runtime/handles.inline.hpp" #include "runtime/javaCalls.hpp" #include "runtime/monitorChunk.hpp" #include "runtime/signature.hpp" #include "runtime/stubCodeGenerator.hpp" #include "runtime/stubRoutines.hpp" #include "vmreg_ppc.inline.hpp" #ifdef COMPILER1 #include "c1/c1_Runtime1.hpp" #include "runtime/vframeArray.hpp" #endif #ifdef ASSERT void RegisterMap::check_location_valid() { } #endif // ASSERT bool frame::safe_for_sender(JavaThread *thread) { bool safe = false; address cursp = (address)sp(); address curfp = (address)fp(); if ((cursp != NULL && curfp != NULL && (cursp <= thread->stack_base() && cursp >= thread->stack_base() - thread->stack_size())) && (curfp <= thread->stack_base() && curfp >= thread->stack_base() - thread->stack_size())) { safe = true; } return safe; } bool frame::is_interpreted_frame() const { return Interpreter::contains(pc()); } frame frame::sender_for_entry_frame(RegisterMap *map) const { assert(map != NULL, "map must be set"); // Java frame called from C; skip all C frames and return top C // frame of that chunk as the sender. JavaFrameAnchor* jfa = entry_frame_call_wrapper()->anchor(); assert(!entry_frame_is_first(), "next Java fp must be non zero"); assert(jfa->last_Java_sp() > _sp, "must be above this frame on stack"); map->clear(); assert(map->include_argument_oops(), "should be set by clear"); if (jfa->last_Java_pc() != NULL) { frame fr(jfa->last_Java_sp(), jfa->last_Java_pc()); return fr; } // Last_java_pc is not set, if we come here from compiled code. The // constructor retrieves the PC from the stack. frame fr(jfa->last_Java_sp()); return fr; } frame frame::sender_for_interpreter_frame(RegisterMap *map) const { // Pass callers initial_caller_sp as unextended_sp. return frame(sender_sp(), sender_pc(), CC_INTERP_ONLY((intptr_t*)((parent_ijava_frame_abi *)callers_abi())->initial_caller_sp) NOT_CC_INTERP((intptr_t*)get_ijava_state()->sender_sp) ); } frame frame::sender_for_compiled_frame(RegisterMap *map) const { assert(map != NULL, "map must be set"); // Frame owned by compiler. address pc = *compiled_sender_pc_addr(_cb); frame caller(compiled_sender_sp(_cb), pc); // Now adjust the map. // Get the rest. if (map->update_map()) { // Tell GC to use argument oopmaps for some runtime stubs that need it. map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); if (_cb->oop_maps() != NULL) { OopMapSet::update_register_map(this, map); } } return caller; } intptr_t* frame::compiled_sender_sp(CodeBlob* cb) const { return sender_sp(); } address* frame::compiled_sender_pc_addr(CodeBlob* cb) const { return sender_pc_addr(); } frame frame::sender(RegisterMap* map) const { // Default is we do have to follow them. The sender_for_xxx will // update it accordingly. map->set_include_argument_oops(false); if (is_entry_frame()) return sender_for_entry_frame(map); if (is_interpreted_frame()) return sender_for_interpreter_frame(map); assert(_cb == CodeCache::find_blob(pc()),"Must be the same"); if (_cb != NULL) { return sender_for_compiled_frame(map); } // Must be native-compiled frame, i.e. the marshaling code for native // methods that exists in the core system. return frame(sender_sp(), sender_pc()); } void frame::patch_pc(Thread* thread, address pc) { if (TracePcPatching) { tty->print_cr("patch_pc at address " PTR_FORMAT " [" PTR_FORMAT " -> " PTR_FORMAT "]", p2i(&((address*) _sp)[-1]), p2i(((address*) _sp)[-1]), p2i(pc)); } own_abi()->lr = (uint64_t)pc; _cb = CodeCache::find_blob(pc); if (_cb != NULL && _cb->is_nmethod() && ((nmethod*)_cb)->is_deopt_pc(_pc)) { address orig = (((nmethod*)_cb)->get_original_pc(this)); assert(orig == _pc, "expected original to be stored before patching"); _deopt_state = is_deoptimized; // Leave _pc as is. } else { _deopt_state = not_deoptimized; _pc = pc; } } bool frame::is_interpreted_frame_valid(JavaThread* thread) const { // Is there anything to do? assert(is_interpreted_frame(), "Not an interpreted frame"); return true; } BasicType frame::interpreter_frame_result(oop* oop_result, jvalue* value_result) { assert(is_interpreted_frame(), "interpreted frame expected"); Method* method = interpreter_frame_method(); BasicType type = method->result_type(); if (method->is_native()) { // Prior to calling into the runtime to notify the method exit the possible // result value is saved into the interpreter frame. #ifdef CC_INTERP interpreterState istate = get_interpreterState(); address lresult = (address)istate + in_bytes(BytecodeInterpreter::native_lresult_offset()); address fresult = (address)istate + in_bytes(BytecodeInterpreter::native_fresult_offset()); #else address lresult = (address)&(get_ijava_state()->lresult); address fresult = (address)&(get_ijava_state()->fresult); #endif switch (method->result_type()) { case T_OBJECT: case T_ARRAY: { oop* obj_p = *(oop**)lresult; oop obj = (obj_p == NULL) ? (oop)NULL : *obj_p; assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); *oop_result = obj; break; } // We use std/stfd to store the values. case T_BOOLEAN : value_result->z = (jboolean) *(unsigned long*)lresult; break; case T_INT : value_result->i = (jint) *(long*)lresult; break; case T_CHAR : value_result->c = (jchar) *(unsigned long*)lresult; break; case T_SHORT : value_result->s = (jshort) *(long*)lresult; break; case T_BYTE : value_result->z = (jbyte) *(long*)lresult; break; case T_LONG : value_result->j = (jlong) *(long*)lresult; break; case T_FLOAT : value_result->f = (jfloat) *(double*)fresult; break; case T_DOUBLE : value_result->d = (jdouble) *(double*)fresult; break; case T_VOID : /* Nothing to do */ break; default : ShouldNotReachHere(); } } else { intptr_t* tos_addr = interpreter_frame_tos_address(); switch (method->result_type()) { case T_OBJECT: case T_ARRAY: { oop obj = *(oop*)tos_addr; assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); *oop_result = obj; } case T_BOOLEAN : value_result->z = (jboolean) *(jint*)tos_addr; break; case T_BYTE : value_result->b = (jbyte) *(jint*)tos_addr; break; case T_CHAR : value_result->c = (jchar) *(jint*)tos_addr; break; case T_SHORT : value_result->s = (jshort) *(jint*)tos_addr; break; case T_INT : value_result->i = *(jint*)tos_addr; break; case T_LONG : value_result->j = *(jlong*)tos_addr; break; case T_FLOAT : value_result->f = *(jfloat*)tos_addr; break; case T_DOUBLE : value_result->d = *(jdouble*)tos_addr; break; case T_VOID : /* Nothing to do */ break; default : ShouldNotReachHere(); } } return type; } #ifndef PRODUCT void frame::describe_pd(FrameValues& values, int frame_no) { if (is_interpreted_frame()) { #ifdef CC_INTERP interpreterState istate = get_interpreterState(); values.describe(frame_no, (intptr_t*)istate, "istate"); values.describe(frame_no, (intptr_t*)&(istate->_thread), " thread"); values.describe(frame_no, (intptr_t*)&(istate->_bcp), " bcp"); values.describe(frame_no, (intptr_t*)&(istate->_locals), " locals"); values.describe(frame_no, (intptr_t*)&(istate->_constants), " constants"); values.describe(frame_no, (intptr_t*)&(istate->_method), err_msg(" method = %s", istate->_method->name_and_sig_as_C_string())); values.describe(frame_no, (intptr_t*)&(istate->_mdx), " mdx"); values.describe(frame_no, (intptr_t*)&(istate->_stack), " stack"); values.describe(frame_no, (intptr_t*)&(istate->_msg), err_msg(" msg = %s", BytecodeInterpreter::C_msg(istate->_msg))); values.describe(frame_no, (intptr_t*)&(istate->_result), " result"); values.describe(frame_no, (intptr_t*)&(istate->_prev_link), " prev_link"); values.describe(frame_no, (intptr_t*)&(istate->_oop_temp), " oop_temp"); values.describe(frame_no, (intptr_t*)&(istate->_stack_base), " stack_base"); values.describe(frame_no, (intptr_t*)&(istate->_stack_limit), " stack_limit"); values.describe(frame_no, (intptr_t*)&(istate->_monitor_base), " monitor_base"); values.describe(frame_no, (intptr_t*)&(istate->_frame_bottom), " frame_bottom"); values.describe(frame_no, (intptr_t*)&(istate->_last_Java_pc), " last_Java_pc"); values.describe(frame_no, (intptr_t*)&(istate->_last_Java_fp), " last_Java_fp"); values.describe(frame_no, (intptr_t*)&(istate->_last_Java_sp), " last_Java_sp"); values.describe(frame_no, (intptr_t*)&(istate->_self_link), " self_link"); values.describe(frame_no, (intptr_t*)&(istate->_native_fresult), " native_fresult"); values.describe(frame_no, (intptr_t*)&(istate->_native_lresult), " native_lresult"); #else #define DESCRIBE_ADDRESS(name) \ values.describe(frame_no, (intptr_t*)&(get_ijava_state()->name), #name); DESCRIBE_ADDRESS(method); DESCRIBE_ADDRESS(locals); DESCRIBE_ADDRESS(monitors); DESCRIBE_ADDRESS(cpoolCache); DESCRIBE_ADDRESS(bcp); DESCRIBE_ADDRESS(esp); DESCRIBE_ADDRESS(mdx); DESCRIBE_ADDRESS(top_frame_sp); DESCRIBE_ADDRESS(sender_sp); DESCRIBE_ADDRESS(oop_tmp); DESCRIBE_ADDRESS(lresult); DESCRIBE_ADDRESS(fresult); #endif } } #endif void frame::adjust_unextended_sp() { // If we are returning to a compiled MethodHandle call site, the // saved_fp will in fact be a saved value of the unextended SP. The // simplest way to tell whether we are returning to such a call site // is as follows: if (is_compiled_frame() && false /*is_at_mh_callsite()*/) { // TODO PPC port // If the sender PC is a deoptimization point, get the original // PC. For MethodHandle call site the unextended_sp is stored in // saved_fp. _unextended_sp = _fp - _cb->frame_size(); #ifdef ASSERT nmethod *sender_nm = _cb->as_nmethod_or_null(); assert(sender_nm && *_sp == *_unextended_sp, "backlink changed"); intptr_t* sp = _unextended_sp; // check if stack can be walked from here for (int x = 0; x < 5; ++x) { // check up to a couple of backlinks intptr_t* prev_sp = *(intptr_t**)sp; if (prev_sp == 0) break; // end of stack assert(prev_sp>sp, "broken stack"); sp = prev_sp; } if (sender_nm->is_deopt_mh_entry(_pc)) { // checks for deoptimization address original_pc = sender_nm->get_original_pc(this); assert(sender_nm->insts_contains(original_pc), "original PC must be in nmethod"); assert(sender_nm->is_method_handle_return(original_pc), "must be"); } #endif } } intptr_t *frame::initial_deoptimization_info() { // unused... but returns fp() to minimize changes introduced by 7087445 return fp(); }