Mercurial > hg > graal-compiler
view src/cpu/sparc/vm/compiledIC_sparc.cpp @ 21072:0ff1d79095ed
Guard for null pointer exception
author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Tue, 21 Apr 2015 09:09:29 -0700 |
parents | 7848fc12602b |
children | be896a1983c0 |
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/* * 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()); } // ---------------------------------------------------------------------------- #define __ _masm. void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf, address mark) { // Stub is fixed up when the corresponding call is converted from calling // compiled code to calling interpreted code. // set (empty), G5 // jmp -1 if (mark == NULL) { mark = cbuf.insts_mark(); // Get mark within main instrs section. } MacroAssembler _masm(&cbuf); address base = __ start_a_stub(to_interp_stub_size()); guarantee(base != NULL, "out of space"); // Static stub relocation stores the instruction address of the call. __ relocate(static_stub_Relocation::spec(mark)); __ set_metadata(NULL, G5); __ set_inst_mark(); AddressLiteral addrlit(-1); __ JUMP(addrlit, G3, 0); __ delayed()->nop(); assert(__ pc() - base <= to_interp_stub_size(), "wrong stub size"); // Update current stubs pointer and restore code_end. __ end_a_stub(); } #undef __ int CompiledStaticCall::to_interp_stub_size() { // This doesn't need to be accurate but it must be larger or equal to // the real size of the stub. return (NativeMovConstReg::instruction_size + // sethi/setlo; NativeJump::instruction_size + // sethi; jmp; nop (TraceJumps ? 20 * BytesPerInstWord : 0) ); } // Relocation entries for call stub, compiled java to interpreter. int CompiledStaticCall::reloc_to_interp_stub() { return 10; // 4 in emit_java_to_interp + 1 in Java_Static_Call } void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) { address stub = find_stub(); #ifdef GRAAL if (stub == NULL) { set_destination_mt_safe(entry); return; } #endif 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); 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); 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(); #ifndef GRAAL assert(stub != NULL, "no stub found for static call"); // Creation also verifies the object. NativeMovConstReg* method_holder = nativeMovConstReg_at(stub); NativeJump* jump = nativeJump_at(method_holder->next_instruction_address()); #endif // Verify state. assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check"); } #endif // !PRODUCT