Mercurial > hg > graal-compiler
view src/share/vm/runtime/icache.cpp @ 1634:60a14ad85270
6966411: escape.cpp:450 assert(base->Opcode() == Op_ConP
Summary: Execute IGVN optimization before and after Escape Analysis
Reviewed-by: never
author | kvn |
---|---|
date | Fri, 02 Jul 2010 17:30:30 -0700 |
parents | c18cbe5936b8 |
children | 3e8fbc61cee8 |
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/* * Copyright (c) 1997, 2006, 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 "incls/_precompiled.incl" #include "incls/_icache.cpp.incl" // The flush stub function address AbstractICache::flush_icache_stub_t AbstractICache::_flush_icache_stub = NULL; void AbstractICache::initialize() { // Making this stub must be FIRST use of assembler ResourceMark rm; BufferBlob* b = BufferBlob::create("flush_icache_stub", ICache::stub_size); CodeBuffer c(b->instructions_begin(), b->instructions_size()); ICacheStubGenerator g(&c); g.generate_icache_flush(&_flush_icache_stub); // The first use of flush_icache_stub must apply it to itself. // The StubCodeMark destructor in generate_icache_flush will // call Assembler::flush, which in turn will call invalidate_range, // which will in turn call the flush stub. Thus we don't need an // explicit call to invalidate_range here. This assumption is // checked in invalidate_range. } void AbstractICache::call_flush_stub(address start, int lines) { // The business with the magic number is just a little security. // We cannot call the flush stub when generating the flush stub // because it isn't there yet. So, the stub also returns its third // parameter. This is a cheap check that the stub was really executed. static int magic = 0xbaadbabe; int auto_magic = magic; // Make a local copy to avoid race condition int r = (*_flush_icache_stub)(start, lines, auto_magic); guarantee(r == auto_magic, "flush stub routine did not execute"); ++magic; } void AbstractICache::invalidate_word(address addr) { // Because this is called for instruction patching on the fly, long after // bootstrapping, we execute the stub directly. Account for a 4-byte word // spanning two cache lines by computing a start line address by rounding // addr down to a line_size boundary, and an end line address by adding // the word size - 1 and rounding the result down to a line_size boundary. // If we just added word size, we'd mistakenly flush the next cache line // if the word to be flushed started in the last 4 bytes of the line. // Doing that would segv if the next line weren't mapped. const int word_size_in_bytes = 4; // Always, regardless of platform intptr_t start_line = ((intptr_t)addr + 0) & ~(ICache::line_size - 1); intptr_t end_line = ((intptr_t)addr + word_size_in_bytes - 1) & ~(ICache::line_size - 1); (*_flush_icache_stub)((address)start_line, start_line == end_line ? 1 : 2, 0); } void AbstractICache::invalidate_range(address start, int nbytes) { static bool firstTime = true; if (firstTime) { guarantee(start == CAST_FROM_FN_PTR(address, _flush_icache_stub), "first flush should be for flush stub"); firstTime = false; return; } if (nbytes == 0) { return; } // Align start address to an icache line boundary and transform // nbytes to an icache line count. const uint line_offset = mask_address_bits(start, ICache::line_size-1); if (line_offset != 0) { start -= line_offset; nbytes += line_offset; } call_flush_stub(start, round_to(nbytes, ICache::line_size) >> ICache::log2_line_size); } // For init.cpp void icache_init() { ICache::initialize(); }