Mercurial > hg > graal-compiler
view src/cpu/ppc/vm/compiledIC_ppc.cpp @ 18573:c91f49e8d5ac
Introduce BackendTest.
author | Josef Eisl <josef.eisl@jku.at> |
---|---|
date | Wed, 26 Nov 2014 19:12:49 +0100 |
parents | ec28f9c041ff |
children | c64b6b0c40c8 |
line wrap: on
line source
/* * Copyright (c) 1997, 2013, 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 "asm/macroAssembler.inline.hpp" #include "code/compiledIC.hpp" #include "code/icBuffer.hpp" #include "code/nmethod.hpp" #include "memory/resourceArea.hpp" #include "runtime/mutexLocker.hpp" #include "runtime/safepoint.hpp" #ifdef COMPILER2 #include "opto/matcher.hpp" #endif // Release the CompiledICHolder* associated with this call site is there is one. void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) { // This call site might have become stale so inspect it carefully. NativeCall* call = nativeCall_at(call_site->addr()); if (is_icholder_entry(call->destination())) { NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value()); InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data()); } } bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) { // This call site might have become stale so inspect it carefully. NativeCall* call = nativeCall_at(call_site->addr()); return is_icholder_entry(call->destination()); } //----------------------------------------------------------------------------- // High-level access to an inline cache. Guaranteed to be MT-safe. CompiledIC::CompiledIC(nmethod* nm, NativeCall* call) : _ic_call(call) { address ic_call = call->instruction_address(); assert(ic_call != NULL, "ic_call address must be set"); assert(nm != NULL, "must pass nmethod"); assert(nm->contains(ic_call), "must be in nmethod"); // Search for the ic_call at the given address. RelocIterator iter(nm, ic_call, ic_call+1); bool ret = iter.next(); assert(ret == true, "relocInfo must exist at this address"); assert(iter.addr() == ic_call, "must find ic_call"); if (iter.type() == relocInfo::virtual_call_type) { virtual_call_Relocation* r = iter.virtual_call_reloc(); _is_optimized = false; _value = nativeMovConstReg_at(r->cached_value()); } else { assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call"); _is_optimized = true; _value = NULL; } } // ---------------------------------------------------------------------------- // A PPC CompiledStaticCall looks like this: // // >>>> consts // // [call target1] // [IC cache] // [call target2] // // <<<< consts // >>>> insts // // bl offset16 -+ -+ ??? // How many bits available? // | | // <<<< insts | | // >>>> stubs | | // | |- trampoline_stub_Reloc // trampoline stub: | <-+ // r2 = toc | // r2 = [r2 + offset] | // Load call target1 from const section // mtctr r2 | // bctr |- static_stub_Reloc // comp_to_interp_stub: <---+ // r1 = toc // ICreg = [r1 + IC_offset] // Load IC from const section // r1 = [r1 + offset] // Load call target2 from const section // mtctr r1 // bctr // // <<<< stubs // // The call instruction in the code either // - branches directly to a compiled method if offset encodable in instruction // - branches to the trampoline stub if offset to compiled method not encodable // - branches to the compiled_to_interp stub if target interpreted // // Further there are three relocations from the loads to the constants in // the constant section. // // Usage of r1 and r2 in the stubs allows to distinguish them. const int IC_pos_in_java_to_interp_stub = 8; #define __ _masm. void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) { #ifdef COMPILER2 // Get the mark within main instrs section which is set to the address of the call. address call_addr = cbuf.insts_mark(); // Note that the code buffer's insts_mark is always relative to insts. // That's why we must use the macroassembler to generate a stub. MacroAssembler _masm(&cbuf); // Start the stub. address stub = __ start_a_stub(CompiledStaticCall::to_interp_stub_size()); if (stub == NULL) { Compile::current()->env()->record_out_of_memory_failure(); return; } // For java_to_interp stubs we use R11_scratch1 as scratch register // and in call trampoline stubs we use R12_scratch2. This way we // can distinguish them (see is_NativeCallTrampolineStub_at()). Register reg_scratch = R11_scratch1; // Create a static stub relocation which relates this stub // with the call instruction at insts_call_instruction_offset in the // instructions code-section. __ relocate(static_stub_Relocation::spec(call_addr)); const int stub_start_offset = __ offset(); // Now, create the stub's code: // - load the TOC // - load the inline cache oop from the constant pool // - load the call target from the constant pool // - call __ calculate_address_from_global_toc(reg_scratch, __ method_toc()); AddressLiteral ic = __ allocate_metadata_address((Metadata *)NULL); __ load_const_from_method_toc(as_Register(Matcher::inline_cache_reg_encode()), ic, reg_scratch); if (ReoptimizeCallSequences) { __ b64_patchable((address)-1, relocInfo::none); } else { AddressLiteral a((address)-1); __ load_const_from_method_toc(reg_scratch, a, reg_scratch); __ mtctr(reg_scratch); __ bctr(); } // FIXME: Assert that the stub can be identified and patched. // Java_to_interp_stub_size should be good. assert((__ offset() - stub_start_offset) <= CompiledStaticCall::to_interp_stub_size(), "should be good size"); assert(!is_NativeCallTrampolineStub_at(__ addr_at(stub_start_offset)), "must not confuse java_to_interp with trampoline stubs"); // End the stub. __ end_a_stub(); #else ShouldNotReachHere(); #endif } #undef __ // Size of java_to_interp stub, this doesn't need to be accurate but it must // be larger or equal to the real size of the stub. // Used for optimization in Compile::Shorten_branches. int CompiledStaticCall::to_interp_stub_size() { return 12 * BytesPerInstWord; } // Relocation entries for call stub, compiled java to interpreter. // Used for optimization in Compile::Shorten_branches. int CompiledStaticCall::reloc_to_interp_stub() { return 5; } void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) { address stub = find_stub(); guarantee(stub != NULL, "stub not found"); if (TraceICs) { ResourceMark rm; tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s", instruction_address(), callee->name_and_sig_as_C_string()); } // Creation also verifies the object. NativeMovConstReg* method_holder = nativeMovConstReg_at(stub + IC_pos_in_java_to_interp_stub); NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(), "a) MT-unsafe modification of inline cache"); assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry, "b) MT-unsafe modification of inline cache"); // Update stub. method_holder->set_data((intptr_t)callee()); jump->set_jump_destination(entry); // Update jump to call. set_destination_mt_safe(stub); } void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) { assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call"); // Reset stub. address stub = static_stub->addr(); assert(stub != NULL, "stub not found"); // Creation also verifies the object. NativeMovConstReg* method_holder = nativeMovConstReg_at(stub + IC_pos_in_java_to_interp_stub); NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); method_holder->set_data(0); jump->set_jump_destination((address)-1); } //----------------------------------------------------------------------------- // Non-product mode code #ifndef PRODUCT void CompiledStaticCall::verify() { // Verify call. NativeCall::verify(); if (os::is_MP()) { verify_alignment(); } // Verify stub. address stub = find_stub(); assert(stub != NULL, "no stub found for static call"); // Creation also verifies the object. NativeMovConstReg* method_holder = nativeMovConstReg_at(stub + IC_pos_in_java_to_interp_stub); NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); // Verify state. assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); } #endif // !PRODUCT