Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/icache.cpp @ 10241:d17700c82d7d
8006088: Incompatible heap size flags accepted by VM
Summary: Make processing of minimum, initial and maximum heap size more intiutive by removing previous limitations on allowed values, and make error reporting consistent. Further, fix errors in ergonomic heap sizing.
Reviewed-by: johnc, jwilhelm, tamao
| author | tschatzl |
|---|---|
| date | Mon, 06 May 2013 17:19:42 +0200 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1748 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "memory/resourceArea.hpp" | |
| 27 #include "runtime/icache.hpp" | |
| 0 | 28 |
| 29 // The flush stub function address | |
| 30 AbstractICache::flush_icache_stub_t AbstractICache::_flush_icache_stub = NULL; | |
| 31 | |
| 32 void AbstractICache::initialize() { | |
| 33 // Making this stub must be FIRST use of assembler | |
| 34 ResourceMark rm; | |
| 35 | |
| 36 BufferBlob* b = BufferBlob::create("flush_icache_stub", ICache::stub_size); | |
| 1748 | 37 CodeBuffer c(b); |
| 0 | 38 |
| 39 ICacheStubGenerator g(&c); | |
| 40 g.generate_icache_flush(&_flush_icache_stub); | |
| 41 | |
| 42 // The first use of flush_icache_stub must apply it to itself. | |
| 43 // The StubCodeMark destructor in generate_icache_flush will | |
| 44 // call Assembler::flush, which in turn will call invalidate_range, | |
| 45 // which will in turn call the flush stub. Thus we don't need an | |
| 46 // explicit call to invalidate_range here. This assumption is | |
| 47 // checked in invalidate_range. | |
| 48 } | |
| 49 | |
| 50 void AbstractICache::call_flush_stub(address start, int lines) { | |
| 51 // The business with the magic number is just a little security. | |
| 52 // We cannot call the flush stub when generating the flush stub | |
| 53 // because it isn't there yet. So, the stub also returns its third | |
| 54 // parameter. This is a cheap check that the stub was really executed. | |
| 55 static int magic = 0xbaadbabe; | |
| 56 | |
| 57 int auto_magic = magic; // Make a local copy to avoid race condition | |
| 58 int r = (*_flush_icache_stub)(start, lines, auto_magic); | |
| 59 guarantee(r == auto_magic, "flush stub routine did not execute"); | |
| 60 ++magic; | |
| 61 } | |
| 62 | |
| 63 void AbstractICache::invalidate_word(address addr) { | |
| 64 // Because this is called for instruction patching on the fly, long after | |
| 65 // bootstrapping, we execute the stub directly. Account for a 4-byte word | |
| 66 // spanning two cache lines by computing a start line address by rounding | |
| 67 // addr down to a line_size boundary, and an end line address by adding | |
| 68 // the word size - 1 and rounding the result down to a line_size boundary. | |
| 69 // If we just added word size, we'd mistakenly flush the next cache line | |
| 70 // if the word to be flushed started in the last 4 bytes of the line. | |
| 71 // Doing that would segv if the next line weren't mapped. | |
| 72 | |
| 73 const int word_size_in_bytes = 4; // Always, regardless of platform | |
| 74 | |
| 75 intptr_t start_line = ((intptr_t)addr + 0) & ~(ICache::line_size - 1); | |
| 76 intptr_t end_line = ((intptr_t)addr + word_size_in_bytes - 1) | |
| 77 & ~(ICache::line_size - 1); | |
| 78 (*_flush_icache_stub)((address)start_line, start_line == end_line ? 1 : 2, 0); | |
| 79 } | |
| 80 | |
| 81 void AbstractICache::invalidate_range(address start, int nbytes) { | |
| 82 static bool firstTime = true; | |
| 83 if (firstTime) { | |
| 84 guarantee(start == CAST_FROM_FN_PTR(address, _flush_icache_stub), | |
| 85 "first flush should be for flush stub"); | |
| 86 firstTime = false; | |
| 87 return; | |
| 88 } | |
| 89 if (nbytes == 0) { | |
| 90 return; | |
| 91 } | |
| 92 // Align start address to an icache line boundary and transform | |
| 93 // nbytes to an icache line count. | |
| 94 const uint line_offset = mask_address_bits(start, ICache::line_size-1); | |
| 95 if (line_offset != 0) { | |
| 96 start -= line_offset; | |
| 97 nbytes += line_offset; | |
| 98 } | |
| 99 call_flush_stub(start, round_to(nbytes, ICache::line_size) >> | |
| 100 ICache::log2_line_size); | |
| 101 } | |
| 102 | |
| 103 // For init.cpp | |
| 104 void icache_init() { | |
| 105 ICache::initialize(); | |
| 106 } |