Mercurial > hg > graal-compiler
view src/cpu/ppc/vm/nativeInst_ppc.cpp @ 18092:9e2bb00a8191 jdk8u25-b11
Merge
author | coffeys |
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date | Fri, 01 Aug 2014 10:16:39 +0100 |
parents | c668f307a4c0 |
children | 327e7269f90d |
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/* * 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(nm); } 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::ppc64_flush_icache_bytes(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); if (MacroAssembler::is_load_const_at(addr)) { return MacroAssembler::get_const(addr); } CodeBlob* cb = CodeCache::find_blob_unsafe(addr); 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. if (MacroAssembler::get_address_of_calculate_address_from_global_toc_at(addr, cb->content_begin()) != (address)data) { 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::ppc64_flush_icache_bytes(start, range); } next_address = addr + 1 * BytesPerInstWord; } else if (MacroAssembler::is_load_const_at(addr)) { // A normal 5 instruction load_const code sequence. if (MacroAssembler::get_const(addr) != (long)data) { // This is not mt safe, ok in methods like CodeBuffer::copy_code(). MacroAssembler::patch_const(addr, (long)data); ICache::ppc64_flush_icache_bytes(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::ppc64_flush_icache_bytes(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()); if (MacroAssembler::get_narrow_oop(addr, cb->content_begin()) == (long)data) return; 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::ppc64_flush_icache_bytes(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); if (! MacroAssembler::is_load_const_at(addr) && ! MacroAssembler::is_load_const_from_method_toc_at(addr)) { CodeBlob* cb = CodeCache::find_blob_unsafe(addr); // find_nmethod() asserts if nmethod is zombie. if (! (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::ppc64_flush_icache_bytes(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(nmethod *nm) const { CodeBlob* cb = nm ? nm : CodeCache::find_blob_unsafe(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; }