jdk8-mips64-public/hotspot: src/cpu/ppc/vm/nativeInst

src/cpu/ppc/vm/nativeInst_ppc.cpp@41b780b43b74 (annotated)

src/cpu/ppc/vm/nativeInst_ppc.cpp

Wed, 27 Nov 2013 16:16:21 -0800

author: goetz
date: Wed, 27 Nov 2013 16:16:21 -0800
changeset 6490: 41b780b43b74
parent 6483: 018b357638aa
child 6495: 67fa91961822
permissions: -rw-r--r--

8029015: PPC64 (part 216): opto: trap based null and range checks
Summary: On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.
Reviewed-by: kvn

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * Copyright 2012, 2013 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 "asm/macroAssembler.inline.hpp"
 #include "memory/resourceArea.hpp"
 #include "nativeInst_ppc.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.hpp"
 #include "runtime/sharedRuntime.hpp"
 #include "runtime/stubRoutines.hpp"
 #include "utilities/ostream.hpp"
 #ifdef COMPILER1
 #include "c1/c1_Runtime1.hpp"
 #endif
 // We use an illtrap for marking a method as not_entrant or zombie iff !UseSIGTRAP
 // Work around a C++ compiler bug which changes 'this'
 bool NativeInstruction::is_sigill_zombie_not_entrant_at(address addr) {
   assert(!UseSIGTRAP, "precondition");
   if (*(int*)addr != 0 /*illtrap*/) return false;
   CodeBlob* cb = CodeCache::find_blob_unsafe(addr);
   if (cb == NULL || !cb->is_nmethod()) return false;
   nmethod *nm = (nmethod *)cb;
   // This method is not_entrant or zombie iff the illtrap instruction is
   // located at the verified entry point.
   return nm->verified_entry_point() == addr;
 }
 #ifdef ASSERT
 void NativeInstruction::verify() {
   // Make sure code pattern is actually an instruction address.
   address addr = addr_at(0);
   if (addr == 0 || ((intptr_t)addr & 3) != 0) {
     fatal("not an instruction address");
   }
 }
 #endif // ASSERT
 // Extract call destination from a NativeCall. The call might use a trampoline stub.
 address NativeCall::destination() const {
   address addr = (address)this;
   address destination = Assembler::bxx_destination(addr);
   // Do we use a trampoline stub for this call?
   CodeBlob* cb = CodeCache::find_blob_unsafe(addr);   // Else we get assertion if nmethod is zombie.
   assert(cb && cb->is_nmethod(), "sanity");
   nmethod *nm = (nmethod *)cb;
   if (nm->stub_contains(destination) && is_NativeCallTrampolineStub_at(destination)) {
     // Yes we do, so get the destination from the trampoline stub.
     const address trampoline_stub_addr = destination;
     destination = NativeCallTrampolineStub_at(trampoline_stub_addr)->destination();
   }
   return destination;
 }
 // Similar to replace_mt_safe, but just changes the destination. The
 // important thing is that free-running threads are able to execute this
 // call instruction at all times. Thus, the displacement field must be
 // instruction-word-aligned.
 //
 // Used in the runtime linkage of calls; see class CompiledIC.
 //
 // Add parameter assert_lock to switch off assertion
 // during code generation, where no patching lock is needed.
 void NativeCall::set_destination_mt_safe(address dest, bool assert_lock) {
   assert(!assert_lock ||
          (Patching_lock->is_locked() || SafepointSynchronize::is_at_safepoint()),
          "concurrent code patching");
   ResourceMark rm;
   int code_size = 1 * BytesPerInstWord;
   address addr_call = addr_at(0);
   assert(MacroAssembler::is_bl(*(int*)addr_call), "unexpected code at call-site");
   CodeBuffer cb(addr_call, code_size + 1);
   MacroAssembler* a = new MacroAssembler(&cb);
   // Patch the call.
   if (ReoptimizeCallSequences &&
       a->is_within_range_of_b(dest, addr_call)) {
     a->bl(dest);
   } else {
     address trampoline_stub_addr = get_trampoline();
     // We did not find a trampoline stub because the current codeblob
     // does not provide this information. The branch will be patched
     // later during a final fixup, when all necessary information is
     // available.
     if (trampoline_stub_addr == 0)
       return;
     // Patch the constant in the call's trampoline stub.
     NativeCallTrampolineStub_at(trampoline_stub_addr)->set_destination(dest);
     a->bl(trampoline_stub_addr);
   }
   ICache::invalidate_range(addr_call, code_size);
 }
 address NativeCall::get_trampoline() {
   address call_addr = addr_at(0);
   CodeBlob *code = CodeCache::find_blob(call_addr);
   assert(code != NULL, "Could not find the containing code blob");
   // There are no relocations available when the code gets relocated
   // because of CodeBuffer expansion.
   if (code->relocation_size() == 0)
     return NULL;
   address bl_destination = Assembler::bxx_destination(call_addr);
   if (code->content_contains(bl_destination) &&
       is_NativeCallTrampolineStub_at(bl_destination))
     return bl_destination;
   // If the codeBlob is not a nmethod, this is because we get here from the
   // CodeBlob constructor, which is called within the nmethod constructor.
   return trampoline_stub_Relocation::get_trampoline_for(call_addr, (nmethod*)code);
 }
 #ifdef ASSERT
 void NativeCall::verify() {
   address addr = addr_at(0);
   if (!NativeCall::is_call_at(addr)) {
     tty->print_cr("not a NativeCall at " PTR_FORMAT, addr);
     // TODO: PPC port: Disassembler::decode(addr - 20, addr + 20, tty);
     fatal(err_msg("not a NativeCall at " PTR_FORMAT, addr));
   }
 }
 #endif // ASSERT
 #ifdef ASSERT
 void NativeFarCall::verify() {
   address addr = addr_at(0);
   NativeInstruction::verify();
   if (!NativeFarCall::is_far_call_at(addr)) {
     tty->print_cr("not a NativeFarCall at " PTR_FORMAT, addr);
     // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty);
     fatal(err_msg("not a NativeFarCall at " PTR_FORMAT, addr));
   }
 }
 #endif // ASSERT
 address NativeMovConstReg::next_instruction_address() const {
 #ifdef ASSERT
   CodeBlob* nm = CodeCache::find_blob(instruction_address());
   assert(!MacroAssembler::is_set_narrow_oop(addr_at(0), nm->content_begin()), "Should not patch narrow oop here");
 #endif
   if (MacroAssembler::is_load_const_from_method_toc_at(addr_at(0))) {
     return addr_at(load_const_from_method_toc_instruction_size);
   } else {
     return addr_at(load_const_instruction_size);
   }
 }
 intptr_t NativeMovConstReg::data() const {
   address   addr = addr_at(0);
   CodeBlob* cb = CodeCache::find_blob_unsafe(addr);
   if (MacroAssembler::is_load_const_at(addr)) {
     return MacroAssembler::get_const(addr);
   } else if (MacroAssembler::is_set_narrow_oop(addr, cb->content_begin())) {
     narrowOop no = (narrowOop)MacroAssembler::get_narrow_oop(addr, cb->content_begin());
     return cast_from_oop<intptr_t>(oopDesc::decode_heap_oop(no));
   } else {
     assert(MacroAssembler::is_load_const_from_method_toc_at(addr), "must be load_const_from_pool");
     address ctable = cb->content_begin();
     int offset = MacroAssembler::get_offset_of_load_const_from_method_toc_at(addr);
     return *(intptr_t *)(ctable + offset);
   }
 }
 address NativeMovConstReg::set_data_plain(intptr_t data, CodeBlob *cb) {
   address addr         = instruction_address();
   address next_address = NULL;
   if (!cb) cb = CodeCache::find_blob(addr);
   if (cb != NULL && MacroAssembler::is_load_const_from_method_toc_at(addr)) {
     // A load from the method's TOC (ctable).
     assert(cb->is_nmethod(), "must be nmethod");
     const address ctable = cb->content_begin();
     const int toc_offset = MacroAssembler::get_offset_of_load_const_from_method_toc_at(addr);
     *(intptr_t *)(ctable + toc_offset) = data;
     next_address = addr + BytesPerInstWord;
   } else if (cb != NULL &&
              MacroAssembler::is_calculate_address_from_global_toc_at(addr, cb->content_begin())) {
     // A calculation relative to the global TOC.
     const int invalidated_range =
       MacroAssembler::patch_calculate_address_from_global_toc_at(addr, cb->content_begin(),
                                                                  (address)data);
     const address start = invalidated_range < 0 ? addr + invalidated_range : addr;
     // FIXME:
     const int range = invalidated_range < 0 ? 4 - invalidated_range : 8;
     ICache::invalidate_range(start, range);
     next_address = addr + 1 * BytesPerInstWord;
   } else if (MacroAssembler::is_load_const_at(addr)) {
     // A normal 5 instruction load_const code sequence.
     // This is not mt safe, ok in methods like CodeBuffer::copy_code().
     MacroAssembler::patch_const(addr, (long)data);
     ICache::invalidate_range(addr, load_const_instruction_size);
     next_address = addr + 5 * BytesPerInstWord;
   } else if (MacroAssembler::is_bl(* (int*) addr)) {
     // A single branch-and-link instruction.
     ResourceMark rm;
     const int code_size = 1 * BytesPerInstWord;
     CodeBuffer cb(addr, code_size + 1);
     MacroAssembler* a = new MacroAssembler(&cb);
     a->bl((address) data);
     ICache::invalidate_range(addr, code_size);
     next_address = addr + code_size;
   } else {
     ShouldNotReachHere();
   }
   return next_address;
 }
 void NativeMovConstReg::set_data(intptr_t data) {
   // Store the value into the instruction stream.
   CodeBlob *cb = CodeCache::find_blob(instruction_address());
   address next_address = set_data_plain(data, cb);
   // Also store the value into an oop_Relocation cell, if any.
   if (cb && cb->is_nmethod()) {
     RelocIterator iter((nmethod *) cb, instruction_address(), next_address);
     oop* oop_addr = NULL;
     Metadata** metadata_addr = NULL;
     while (iter.next()) {
       if (iter.type() == relocInfo::oop_type) {
         oop_Relocation *r = iter.oop_reloc();
         if (oop_addr == NULL) {
           oop_addr = r->oop_addr();
           *oop_addr = cast_to_oop(data);
         } else {
           assert(oop_addr == r->oop_addr(), "must be only one set-oop here") ;
         }
       }
       if (iter.type() == relocInfo::metadata_type) {
         metadata_Relocation *r = iter.metadata_reloc();
         if (metadata_addr == NULL) {
           metadata_addr = r->metadata_addr();
           *metadata_addr = (Metadata*)data;
         } else {
           assert(metadata_addr == r->metadata_addr(), "must be only one set-metadata here");
         }
       }
     }
   }
 }
 void NativeMovConstReg::set_narrow_oop(narrowOop data, CodeBlob *code /* = NULL */) {
   address   addr = addr_at(0);
   CodeBlob* cb = (code) ? code : CodeCache::find_blob(instruction_address());
   const int invalidated_range =
     MacroAssembler::patch_set_narrow_oop(addr, cb->content_begin(), (long)data);
   const address start = invalidated_range < 0 ? addr + invalidated_range : addr;
   // FIXME:
   const int range = invalidated_range < 0 ? 4 - invalidated_range : 8;
   ICache::invalidate_range(start, range);
 }
 // Do not use an assertion here. Let clients decide whether they only
 // want this when assertions are enabled.
 #ifdef ASSERT
 void NativeMovConstReg::verify() {
   address   addr = addr_at(0);
   CodeBlob* cb = CodeCache::find_blob_unsafe(addr);   // find_nmethod() asserts if nmethod is zombie.
   if (! MacroAssembler::is_load_const_at(addr) &&
       ! MacroAssembler::is_load_const_from_method_toc_at(addr) &&
       ! (cb != NULL && MacroAssembler::is_calculate_address_from_global_toc_at(addr, cb->content_begin())) &&
       ! (cb != NULL && MacroAssembler::is_set_narrow_oop(addr, cb->content_begin())) &&
       ! MacroAssembler::is_bl(*((int*) addr))) {
     tty->print_cr("not a NativeMovConstReg at " PTR_FORMAT, addr);
     // TODO: PPC port Disassembler::decode(addr, 20, 20, tty);
     fatal(err_msg("not a NativeMovConstReg at " PTR_FORMAT, addr));
   }
 }
 #endif // ASSERT
 void NativeJump::patch_verified_entry(address entry, address verified_entry, address dest) {
   ResourceMark rm;
   int code_size = 1 * BytesPerInstWord;
   CodeBuffer cb(verified_entry, code_size + 1);
   MacroAssembler* a = new MacroAssembler(&cb);
 #ifdef COMPILER2
   assert(dest == SharedRuntime::get_handle_wrong_method_stub(), "expected fixed destination of patch");
 #endif
   // Patch this nmethod atomically. Always use illtrap/trap in debug build.
   if (DEBUG_ONLY(false &&) a->is_within_range_of_b(dest, a->pc())) {
     a->b(dest);
   } else {
     // The signal handler will continue at dest=OptoRuntime::handle_wrong_method_stub().
     if (TrapBasedNotEntrantChecks) {
       // We use a special trap for marking a method as not_entrant or zombie.
       a->trap_zombie_not_entrant();
     } else {
       // We use an illtrap for marking a method as not_entrant or zombie.
       a->illtrap();
     }
   }
   ICache::invalidate_range(verified_entry, code_size);
 }
 #ifdef ASSERT
 void NativeJump::verify() {
   address addr = addr_at(0);
   NativeInstruction::verify();
   if (!NativeJump::is_jump_at(addr)) {
     tty->print_cr("not a NativeJump at " PTR_FORMAT, addr);
     // TODO: PPC port: Disassembler::decode(addr, 20, 20, tty);
     fatal(err_msg("not a NativeJump at " PTR_FORMAT, addr));
   }
 }
 #endif // ASSERT
 //-------------------------------------------------------------------
 // Call trampoline stubs.
 //
 // Layout and instructions of a call trampoline stub:
 //    0:  load the TOC (part 1)
 //    4:  load the TOC (part 2)
 //    8:  load the call target from the constant pool (part 1)
 //  [12:  load the call target from the constant pool (part 2, optional)]
 //   ..:  branch via CTR
 //
 address NativeCallTrampolineStub::encoded_destination_addr() const {
   address instruction_addr = addr_at(2 * BytesPerInstWord);
   assert(MacroAssembler::is_ld_largeoffset(instruction_addr),
          "must be a ld with large offset (from the constant pool)");
   return instruction_addr;
 }
 address NativeCallTrampolineStub::destination() const {
   CodeBlob* cb = CodeCache::find_blob(addr_at(0));
   address ctable = cb->content_begin();
   return *(address*)(ctable + destination_toc_offset());
 }
 int NativeCallTrampolineStub::destination_toc_offset() const {
   return MacroAssembler::get_ld_largeoffset_offset(encoded_destination_addr());
 }
 void NativeCallTrampolineStub::set_destination(address new_destination) {
   CodeBlob* cb = CodeCache::find_blob(addr_at(0));
   address ctable = cb->content_begin();
   *(address*)(ctable + destination_toc_offset()) = new_destination;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/ppc/vm/nativeInst_ppc.cpp@41b780b43b74 (annotated)

src/cpu/ppc/vm/nativeInst_ppc.cpp