| /* |
| * Copyright (c) 2008, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "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_arm.inline.hpp" |
| #ifdef COMPILER1 |
| #include "c1/c1_Runtime1.hpp" |
| #include "runtime/vframeArray.hpp" |
| #endif |
| #include "prims/methodHandles.hpp" |
| |
| #ifdef ASSERT |
| void RegisterMap::check_location_valid() { |
| } |
| #endif |
| |
| |
| // Profiling/safepoint support |
| |
| bool frame::safe_for_sender(JavaThread *thread) { |
| address sp = (address)_sp; |
| address fp = (address)_fp; |
| address unextended_sp = (address)_unextended_sp; |
| |
| static size_t stack_guard_size = os::uses_stack_guard_pages() ? |
| (JavaThread::stack_red_zone_size() + JavaThread::stack_yellow_zone_size()) : 0; |
| size_t usable_stack_size = thread->stack_size() - stack_guard_size; |
| |
| // sp must be within the usable part of the stack (not in guards) |
| bool sp_safe = (sp != NULL && |
| (sp <= thread->stack_base()) && |
| (sp >= thread->stack_base() - usable_stack_size)); |
| |
| if (!sp_safe) { |
| return false; |
| } |
| |
| bool unextended_sp_safe = (unextended_sp != NULL && |
| (unextended_sp <= thread->stack_base()) && |
| (unextended_sp >= sp)); |
| if (!unextended_sp_safe) { |
| return false; |
| } |
| |
| // We know sp/unextended_sp are safe. Only fp is questionable here. |
| |
| bool fp_safe = (fp != NULL && |
| (fp <= thread->stack_base()) && |
| fp >= sp); |
| |
| if (_cb != NULL ) { |
| |
| // First check if frame is complete and tester is reliable |
| // Unfortunately we can only check frame complete for runtime stubs and nmethod |
| // other generic buffer blobs are more problematic so we just assume they are |
| // ok. adapter blobs never have a frame complete and are never ok. |
| |
| if (!_cb->is_frame_complete_at(_pc)) { |
| if (_cb->is_compiled() || _cb->is_adapter_blob() || _cb->is_runtime_stub()) { |
| return false; |
| } |
| } |
| |
| // Could just be some random pointer within the codeBlob |
| if (!_cb->code_contains(_pc)) { |
| return false; |
| } |
| |
| // Entry frame checks |
| if (is_entry_frame()) { |
| // an entry frame must have a valid fp. |
| return fp_safe && is_entry_frame_valid(thread); |
| } |
| |
| intptr_t* sender_sp = NULL; |
| address sender_pc = NULL; |
| |
| if (is_interpreted_frame()) { |
| // fp must be safe |
| if (!fp_safe) { |
| return false; |
| } |
| |
| sender_pc = (address) this->fp()[return_addr_offset]; |
| sender_sp = (intptr_t*) addr_at(sender_sp_offset); |
| |
| } else { |
| // must be some sort of compiled/runtime frame |
| // fp does not have to be safe (although it could be check for c1?) |
| |
| sender_sp = _unextended_sp + _cb->frame_size(); |
| // Is sender_sp safe? |
| if ((address)sender_sp >= thread->stack_base()) { |
| return false; |
| } |
| // With our calling conventions, the return_address should |
| // end up being the word on the stack |
| sender_pc = (address) *(sender_sp - sender_sp_offset + return_addr_offset); |
| } |
| |
| // We must always be able to find a recognizable pc |
| CodeBlob* sender_blob = CodeCache::find_blob_unsafe(sender_pc); |
| if (sender_pc == NULL || sender_blob == NULL) { |
| return false; |
| } |
| |
| |
| // If the potential sender is the interpreter then we can do some more checking |
| if (Interpreter::contains(sender_pc)) { |
| |
| // FP is always saved in a recognizable place in any code we generate. However |
| // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved FP |
| // is really a frame pointer. |
| |
| intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset + link_offset); |
| bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp > sender_sp); |
| |
| if (!saved_fp_safe) { |
| return false; |
| } |
| |
| // construct the potential sender |
| |
| frame sender(sender_sp, saved_fp, sender_pc); |
| |
| return sender.is_interpreted_frame_valid(thread); |
| } |
| |
| if (sender_blob->is_zombie() || sender_blob->is_unloaded()) { |
| return false; |
| } |
| |
| // Could just be some random pointer within the codeBlob |
| if (!sender_blob->code_contains(sender_pc)) { |
| return false; |
| } |
| |
| // We should never be able to see an adapter if the current frame is something from code cache |
| if (sender_blob->is_adapter_blob()) { |
| return false; |
| } |
| |
| // Could be the call_stub |
| if (StubRoutines::returns_to_call_stub(sender_pc)) { |
| intptr_t *saved_fp = (intptr_t*)*(sender_sp - frame::sender_sp_offset + link_offset); |
| bool saved_fp_safe = ((address)saved_fp <= thread->stack_base()) && (saved_fp >= sender_sp); |
| |
| if (!saved_fp_safe) { |
| return false; |
| } |
| |
| // construct the potential sender |
| |
| frame sender(sender_sp, saved_fp, sender_pc); |
| |
| // Validate the JavaCallWrapper an entry frame must have |
| address jcw = (address)sender.entry_frame_call_wrapper(); |
| |
| bool jcw_safe = (jcw <= thread->stack_base()) && (jcw > (address)sender.fp()); |
| |
| return jcw_safe; |
| } |
| |
| // If the frame size is 0 something (or less) is bad because every nmethod has a non-zero frame size |
| // because the return address counts against the callee's frame. |
| |
| if (sender_blob->frame_size() <= 0) { |
| assert(!sender_blob->is_compiled(), "should count return address at least"); |
| return false; |
| } |
| |
| // We should never be able to see anything here except an nmethod. If something in the |
| // code cache (current frame) is called by an entity within the code cache that entity |
| // should not be anything but the call stub (already covered), the interpreter (already covered) |
| // or an nmethod. |
| |
| if (!sender_blob->is_compiled()) { |
| return false; |
| } |
| |
| // Could put some more validation for the potential non-interpreted sender |
| // frame we'd create by calling sender if I could think of any. Wait for next crash in forte... |
| |
| // One idea is seeing if the sender_pc we have is one that we'd expect to call to current cb |
| |
| // We've validated the potential sender that would be created |
| return true; |
| } |
| |
| // Must be native-compiled frame. Since sender will try and use fp to find |
| // linkages it must be safe |
| |
| if (!fp_safe) { |
| return false; |
| } |
| |
| // Will the pc we fetch be non-zero (which we'll find at the oldest frame) |
| |
| if ((address) this->fp()[return_addr_offset] == NULL) return false; |
| |
| |
| // could try and do some more potential verification of native frame if we could think of some... |
| |
| return true; |
| } |
| |
| |
| void frame::patch_pc(Thread* thread, address pc) { |
| address* pc_addr = &((address *)sp())[-sender_sp_offset+return_addr_offset]; |
| if (TracePcPatching) { |
| tty->print_cr("patch_pc at address" INTPTR_FORMAT " [" INTPTR_FORMAT " -> " INTPTR_FORMAT "] ", |
| p2i(pc_addr), p2i(*pc_addr), p2i(pc)); |
| } |
| *pc_addr = pc; |
| _cb = CodeCache::find_blob(pc); |
| address original_pc = CompiledMethod::get_deopt_original_pc(this); |
| if (original_pc != NULL) { |
| assert(original_pc == _pc, "expected original PC 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() const { |
| return Interpreter::contains(pc()); |
| } |
| |
| int frame::frame_size(RegisterMap* map) const { |
| frame sender = this->sender(map); |
| return sender.sp() - sp(); |
| } |
| |
| intptr_t* frame::entry_frame_argument_at(int offset) const { |
| assert(is_entry_frame(), "entry frame expected"); |
| // convert offset to index to deal with tsi |
| int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); |
| // Entry frame's arguments are always in relation to unextended_sp() |
| return &unextended_sp()[index]; |
| } |
| |
| // sender_sp |
| intptr_t* frame::interpreter_frame_sender_sp() const { |
| assert(is_interpreted_frame(), "interpreted frame expected"); |
| return (intptr_t*) at(interpreter_frame_sender_sp_offset); |
| } |
| |
| void frame::set_interpreter_frame_sender_sp(intptr_t* sender_sp) { |
| assert(is_interpreted_frame(), "interpreted frame expected"); |
| ptr_at_put(interpreter_frame_sender_sp_offset, (intptr_t) sender_sp); |
| } |
| |
| |
| // monitor elements |
| |
| BasicObjectLock* frame::interpreter_frame_monitor_begin() const { |
| return (BasicObjectLock*) addr_at(interpreter_frame_monitor_block_bottom_offset); |
| } |
| |
| BasicObjectLock* frame::interpreter_frame_monitor_end() const { |
| BasicObjectLock* result = (BasicObjectLock*) *addr_at(interpreter_frame_monitor_block_top_offset); |
| // make sure the pointer points inside the frame |
| assert((intptr_t) fp() > (intptr_t) result, "result must < than frame pointer"); |
| assert((intptr_t) sp() <= (intptr_t) result, "result must >= than stack pointer"); |
| return result; |
| } |
| |
| void frame::interpreter_frame_set_monitor_end(BasicObjectLock* value) { |
| *((BasicObjectLock**)addr_at(interpreter_frame_monitor_block_top_offset)) = value; |
| } |
| |
| #ifdef AARCH64 |
| |
| // Used by template based interpreter deoptimization |
| void frame::interpreter_frame_set_stack_top(intptr_t* stack_top) { |
| *((intptr_t**)addr_at(interpreter_frame_stack_top_offset)) = stack_top; |
| } |
| |
| // Used by template based interpreter deoptimization |
| void frame::interpreter_frame_set_extended_sp(intptr_t* sp) { |
| *((intptr_t**)addr_at(interpreter_frame_extended_sp_offset)) = sp; |
| } |
| |
| #else |
| |
| // Used by template based interpreter deoptimization |
| void frame::interpreter_frame_set_last_sp(intptr_t* sp) { |
| *((intptr_t**)addr_at(interpreter_frame_last_sp_offset)) = sp; |
| } |
| |
| #endif // AARCH64 |
| |
| 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"); |
| #ifdef AARCH64 |
| assert (jfa->last_Java_pc() != NULL, "pc should be stored"); |
| frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); |
| return fr; |
| #else |
| if (jfa->last_Java_pc() != NULL) { |
| frame fr(jfa->last_Java_sp(), jfa->last_Java_fp(), jfa->last_Java_pc()); |
| return fr; |
| } |
| frame fr(jfa->last_Java_sp(), jfa->last_Java_fp()); |
| return fr; |
| #endif // AARCH64 |
| } |
| |
| //------------------------------------------------------------------------------ |
| // frame::verify_deopt_original_pc |
| // |
| // Verifies the calculated original PC of a deoptimization PC for the |
| // given unextended SP. The unextended SP might also be the saved SP |
| // for MethodHandle call sites. |
| #ifdef ASSERT |
| void frame::verify_deopt_original_pc(CompiledMethod* nm, intptr_t* unextended_sp, bool is_method_handle_return) { |
| frame fr; |
| |
| // This is ugly but it's better than to change {get,set}_original_pc |
| // to take an SP value as argument. And it's only a debugging |
| // method anyway. |
| fr._unextended_sp = unextended_sp; |
| |
| address original_pc = nm->get_original_pc(&fr); |
| assert(nm->insts_contains_inclusive(original_pc), |
| "original PC must be in the main code section of the the compiled method (or must be immediately following it)"); |
| assert(nm->is_method_handle_return(original_pc) == is_method_handle_return, "must be"); |
| } |
| #endif |
| |
| //------------------------------------------------------------------------------ |
| // frame::adjust_unextended_sp |
| void frame::adjust_unextended_sp() { |
| // same as on x86 |
| |
| // 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: |
| |
| CompiledMethod* sender_cm = (_cb == NULL) ? NULL : _cb->as_compiled_method_or_null(); |
| if (sender_cm != NULL) { |
| // If the sender PC is a deoptimization point, get the original |
| // PC. For MethodHandle call site the unextended_sp is stored in |
| // saved_fp. |
| if (sender_cm->is_deopt_mh_entry(_pc)) { |
| DEBUG_ONLY(verify_deopt_mh_original_pc(sender_cm, _fp)); |
| _unextended_sp = _fp; |
| } |
| else if (sender_cm->is_deopt_entry(_pc)) { |
| DEBUG_ONLY(verify_deopt_original_pc(sender_cm, _unextended_sp)); |
| } |
| else if (sender_cm->is_method_handle_return(_pc)) { |
| _unextended_sp = _fp; |
| } |
| } |
| } |
| |
| //------------------------------------------------------------------------------ |
| // frame::update_map_with_saved_link |
| void frame::update_map_with_saved_link(RegisterMap* map, intptr_t** link_addr) { |
| // see x86 for comments |
| map->set_location(FP->as_VMReg(), (address) link_addr); |
| #ifdef AARCH64 |
| // also adjust a high part of register |
| map->set_location(FP->as_VMReg()->next(), (address) link_addr); |
| #endif // AARCH64 |
| } |
| |
| frame frame::sender_for_interpreter_frame(RegisterMap* map) const { |
| // SP is the raw SP from the sender after adapter or interpreter |
| // extension. |
| intptr_t* sender_sp = this->sender_sp(); |
| |
| // This is the sp before any possible extension (adapter/locals). |
| intptr_t* unextended_sp = interpreter_frame_sender_sp(); |
| |
| #ifdef COMPILER2 |
| if (map->update_map()) { |
| update_map_with_saved_link(map, (intptr_t**) addr_at(link_offset)); |
| } |
| #endif // COMPILER2 |
| |
| return frame(sender_sp, unextended_sp, link(), sender_pc()); |
| } |
| |
| frame frame::sender_for_compiled_frame(RegisterMap* map) const { |
| assert(map != NULL, "map must be set"); |
| |
| // frame owned by optimizing compiler |
| assert(_cb->frame_size() >= 0, "must have non-zero frame size"); |
| intptr_t* sender_sp = unextended_sp() + _cb->frame_size(); |
| intptr_t* unextended_sp = sender_sp; |
| |
| address sender_pc = (address) *(sender_sp - sender_sp_offset + return_addr_offset); |
| |
| // This is the saved value of FP which may or may not really be an FP. |
| // It is only an FP if the sender is an interpreter frame (or C1?). |
| intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - sender_sp_offset + link_offset); |
| |
| if (map->update_map()) { |
| // Tell GC to use argument oopmaps for some runtime stubs that need it. |
| // For C1, the runtime stub might not have oop maps, so set this flag |
| // outside of update_register_map. |
| map->set_include_argument_oops(_cb->caller_must_gc_arguments(map->thread())); |
| if (_cb->oop_maps() != NULL) { |
| OopMapSet::update_register_map(this, map); |
| } |
| |
| // Since the prolog does the save and restore of FP there is no oopmap |
| // for it so we must fill in its location as if there was an oopmap entry |
| // since if our caller was compiled code there could be live jvm state in it. |
| update_map_with_saved_link(map, saved_fp_addr); |
| } |
| |
| assert(sender_sp != sp(), "must have changed"); |
| return frame(sender_sp, unextended_sp, *saved_fp_addr, sender_pc); |
| } |
| |
| frame frame::sender(RegisterMap* map) const { |
| // Default is we done 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); |
| } |
| |
| assert(false, "should not be called for a C frame"); |
| return frame(); |
| } |
| |
| bool frame::is_interpreted_frame_valid(JavaThread* thread) const { |
| assert(is_interpreted_frame(), "Not an interpreted frame"); |
| // These are reasonable sanity checks |
| if (fp() == 0 || (intptr_t(fp()) & (wordSize-1)) != 0) { |
| return false; |
| } |
| if (sp() == 0 || (intptr_t(sp()) & (wordSize-1)) != 0) { |
| return false; |
| } |
| if (fp() + interpreter_frame_initial_sp_offset < sp()) { |
| return false; |
| } |
| // These are hacks to keep us out of trouble. |
| // The problem with these is that they mask other problems |
| if (fp() <= sp()) { // this attempts to deal with unsigned comparison above |
| return false; |
| } |
| // do some validation of frame elements |
| |
| // first the method |
| |
| Method* m = *interpreter_frame_method_addr(); |
| |
| // validate the method we'd find in this potential sender |
| if (!m->is_valid_method()) return false; |
| |
| // stack frames shouldn't be much larger than max_stack elements |
| |
| if (fp() - sp() > 1024 + m->max_stack()*Interpreter::stackElementSize) { |
| return false; |
| } |
| |
| // validate bci/bcp |
| |
| address bcp = interpreter_frame_bcp(); |
| if (m->validate_bci_from_bcp(bcp) < 0) { |
| return false; |
| } |
| |
| // validate ConstantPoolCache* |
| ConstantPoolCache* cp = *interpreter_frame_cache_addr(); |
| if (cp == NULL || !cp->is_metaspace_object()) return false; |
| |
| // validate locals |
| |
| address locals = (address) *interpreter_frame_locals_addr(); |
| |
| if (locals > thread->stack_base() || locals < (address) fp()) return false; |
| |
| // We'd have to be pretty unlucky to be mislead at this point |
| |
| 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(); |
| |
| intptr_t* res_addr; |
| if (method->is_native()) { |
| // Prior to calling into the runtime to report the method_exit both of |
| // the possible return value registers are saved. |
| #ifdef AARCH64 |
| // Return value registers are saved into the frame |
| if (type == T_FLOAT || type == T_DOUBLE) { |
| res_addr = addr_at(interpreter_frame_fp_saved_result_offset); |
| } else { |
| res_addr = addr_at(interpreter_frame_gp_saved_result_offset); |
| } |
| #else |
| // Return value registers are pushed to the native stack |
| res_addr = (intptr_t*)sp(); |
| #ifdef __ABI_HARD__ |
| // FP result is pushed onto a stack along with integer result registers |
| if (type == T_FLOAT || type == T_DOUBLE) { |
| res_addr += 2; |
| } |
| #endif // __ABI_HARD__ |
| #endif // AARCH64 |
| } else { |
| res_addr = (intptr_t*)interpreter_frame_tos_address(); |
| } |
| |
| switch (type) { |
| case T_OBJECT : |
| case T_ARRAY : { |
| oop obj; |
| if (method->is_native()) { |
| obj = cast_to_oop(at(interpreter_frame_oop_temp_offset)); |
| } else { |
| obj = *(oop*)res_addr; |
| } |
| assert(obj == NULL || Universe::heap()->is_in(obj), "sanity check"); |
| *oop_result = obj; |
| break; |
| } |
| case T_BOOLEAN : value_result->z = *(jboolean*)res_addr; break; |
| case T_BYTE : value_result->b = *(jbyte*)res_addr; break; |
| case T_CHAR : value_result->c = *(jchar*)res_addr; break; |
| case T_SHORT : value_result->s = *(jshort*)res_addr; break; |
| case T_INT : value_result->i = *(jint*)res_addr; break; |
| case T_LONG : value_result->j = *(jlong*)res_addr; break; |
| case T_FLOAT : value_result->f = *(jfloat*)res_addr; break; |
| case T_DOUBLE : value_result->d = *(jdouble*)res_addr; break; |
| case T_VOID : /* Nothing to do */ break; |
| default : ShouldNotReachHere(); |
| } |
| |
| return type; |
| } |
| |
| |
| intptr_t* frame::interpreter_frame_tos_at(jint offset) const { |
| int index = (Interpreter::expr_offset_in_bytes(offset)/wordSize); |
| return &interpreter_frame_tos_address()[index]; |
| } |
| |
| #ifndef PRODUCT |
| |
| #define DESCRIBE_FP_OFFSET(name) \ |
| values.describe(frame_no, fp() + frame::name##_offset, #name) |
| |
| void frame::describe_pd(FrameValues& values, int frame_no) { |
| if (is_interpreted_frame()) { |
| DESCRIBE_FP_OFFSET(interpreter_frame_sender_sp); |
| #ifdef AARCH64 |
| DESCRIBE_FP_OFFSET(interpreter_frame_stack_top); |
| DESCRIBE_FP_OFFSET(interpreter_frame_extended_sp); |
| #else |
| DESCRIBE_FP_OFFSET(interpreter_frame_last_sp); |
| #endif // AARCH64 |
| DESCRIBE_FP_OFFSET(interpreter_frame_method); |
| DESCRIBE_FP_OFFSET(interpreter_frame_mdp); |
| DESCRIBE_FP_OFFSET(interpreter_frame_cache); |
| DESCRIBE_FP_OFFSET(interpreter_frame_locals); |
| DESCRIBE_FP_OFFSET(interpreter_frame_bcp); |
| DESCRIBE_FP_OFFSET(interpreter_frame_initial_sp); |
| } |
| } |
| |
| // This is a generic constructor which is only used by pns() in debug.cpp. |
| frame::frame(void* sp, void* fp, void* pc) { |
| init((intptr_t*)sp, (intptr_t*)fp, (address)pc); |
| } |
| |
| void frame::pd_ps() {} |
| #endif |
| |
| intptr_t *frame::initial_deoptimization_info() { |
| // used to reset the saved FP |
| return fp(); |
| } |
| |
| intptr_t* frame::real_fp() const { |
| #ifndef AARCH64 |
| if (is_entry_frame()) { |
| // Work-around: FP (currently) does not conform to the ABI for entry |
| // frames (see generate_call_stub). Might be worth fixing as another CR. |
| // Following code assumes (and asserts) this has not yet been fixed. |
| assert(frame::entry_frame_call_wrapper_offset == 0, "adjust this code"); |
| intptr_t* new_fp = fp(); |
| new_fp += 5; // saved R0,R1,R2,R4,R10 |
| #ifndef __SOFTFP__ |
| new_fp += 8*2; // saved D8..D15 |
| #endif |
| return new_fp; |
| } |
| #endif // !AARCH64 |
| if (_cb != NULL) { |
| // use the frame size if valid |
| int size = _cb->frame_size(); |
| if (size > 0) { |
| return unextended_sp() + size; |
| } |
| } |
| // else rely on fp() |
| assert(! is_compiled_frame(), "unknown compiled frame size"); |
| return fp(); |
| } |