truffle: src/share/vm/code/codeCache.hpp annotate

annotate src/share/vm/code/codeCache.hpp @ 2353:1c0cf339481b

7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache Summary: Use largest_free_block() instead of unallocated_capacity(). Reviewed-by: iveresov, never, ysr

author	kvn
date	Wed, 09 Mar 2011 09:15:16 -0800
parents	51bd2d261853
children	d673ef06fe96

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1552 diff changeset	2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	25 #ifndef SHARE_VM_CODE_CODECACHE_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	26 #define SHARE_VM_CODE_CODECACHE_HPP
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	27
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	28 #include "code/codeBlob.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	29 #include "memory/allocation.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	30 #include "memory/heap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	31 #include "oops/instanceKlass.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	32 #include "oops/oopsHierarchy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	33
0 a61af66fc99e Initial load duke parents: diff changeset	34 // The CodeCache implements the code cache for various pieces of generated
a61af66fc99e Initial load duke parents: diff changeset	35 // code, e.g., compiled java methods, runtime stubs, transition frames, etc.
a61af66fc99e Initial load duke parents: diff changeset	36 // The entries in the CodeCache are all CodeBlob's.
a61af66fc99e Initial load duke parents: diff changeset	37
a61af66fc99e Initial load duke parents: diff changeset	38 // Implementation:
a61af66fc99e Initial load duke parents: diff changeset	39 // - Each CodeBlob occupies one chunk of memory.
a61af66fc99e Initial load duke parents: diff changeset	40 // - Like the offset table in oldspace the zone has at table for
a61af66fc99e Initial load duke parents: diff changeset	41 // locating a method given a addess of an instruction.
a61af66fc99e Initial load duke parents: diff changeset	42
a61af66fc99e Initial load duke parents: diff changeset	43 class OopClosure;
a61af66fc99e Initial load duke parents: diff changeset	44 class DepChange;
a61af66fc99e Initial load duke parents: diff changeset	45
a61af66fc99e Initial load duke parents: diff changeset	46 class CodeCache : AllStatic {
a61af66fc99e Initial load duke parents: diff changeset	47 friend class VMStructs;
a61af66fc99e Initial load duke parents: diff changeset	48 private:
a61af66fc99e Initial load duke parents: diff changeset	49 // CodeHeap is malloc()'ed at startup and never deleted during shutdown,
a61af66fc99e Initial load duke parents: diff changeset	50 // so that the generated assembly code is always there when it's needed.
a61af66fc99e Initial load duke parents: diff changeset	51 // This may cause memory leak, but is necessary, for now. See 4423824,
a61af66fc99e Initial load duke parents: diff changeset	52 // 4422213 or 4436291 for details.
a61af66fc99e Initial load duke parents: diff changeset	53 static CodeHeap * _heap;
a61af66fc99e Initial load duke parents: diff changeset	54 static int _number_of_blobs;
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1552 diff changeset	55 static int _number_of_adapters;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1552 diff changeset	56 static int _number_of_nmethods;
0 a61af66fc99e Initial load duke parents: diff changeset	57 static int _number_of_nmethods_with_dependencies;
a61af66fc99e Initial load duke parents: diff changeset	58 static bool _needs_cache_clean;
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	59 static nmethod* _scavenge_root_nmethods; // linked via nm->scavenge_root_link()
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 989 diff changeset	60 static nmethod* _saved_nmethods; // linked via nm->saved_nmethod_look()
0 a61af66fc99e Initial load duke parents: diff changeset	61
a61af66fc99e Initial load duke parents: diff changeset	62 static void verify_if_often() PRODUCT_RETURN;
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	63
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	64 static void mark_scavenge_root_nmethods() PRODUCT_RETURN;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	65 static void verify_perm_nmethods(CodeBlobClosure* f_or_null) PRODUCT_RETURN;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	66
0 a61af66fc99e Initial load duke parents: diff changeset	67 public:
a61af66fc99e Initial load duke parents: diff changeset	68
a61af66fc99e Initial load duke parents: diff changeset	69 // Initialization
a61af66fc99e Initial load duke parents: diff changeset	70 static void initialize();
a61af66fc99e Initial load duke parents: diff changeset	71
a61af66fc99e Initial load duke parents: diff changeset	72 // Allocation/administration
a61af66fc99e Initial load duke parents: diff changeset	73 static CodeBlob* allocate(int size); // allocates a new CodeBlob
a61af66fc99e Initial load duke parents: diff changeset	74 static void commit(CodeBlob* cb); // called when the allocated CodeBlob has been filled
a61af66fc99e Initial load duke parents: diff changeset	75 static int alignment_unit(); // guaranteed alignment of all CodeBlobs
a61af66fc99e Initial load duke parents: diff changeset	76 static int alignment_offset(); // guaranteed offset of first CodeBlob byte within alignment unit (i.e., allocation header)
a61af66fc99e Initial load duke parents: diff changeset	77 static void free(CodeBlob* cb); // frees a CodeBlob
a61af66fc99e Initial load duke parents: diff changeset	78 static void flush(); // flushes all CodeBlobs
a61af66fc99e Initial load duke parents: diff changeset	79 static bool contains(void *p); // returns whether p is included
a61af66fc99e Initial load duke parents: diff changeset	80 static void blobs_do(void f(CodeBlob* cb)); // iterates over all CodeBlobs
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	81 static void blobs_do(CodeBlobClosure* f); // iterates over all CodeBlobs
0 a61af66fc99e Initial load duke parents: diff changeset	82 static void nmethods_do(void f(nmethod* nm)); // iterates over all nmethods
a61af66fc99e Initial load duke parents: diff changeset	83
a61af66fc99e Initial load duke parents: diff changeset	84 // Lookup
a61af66fc99e Initial load duke parents: diff changeset	85 static CodeBlob* find_blob(void* start);
a61af66fc99e Initial load duke parents: diff changeset	86 static nmethod* find_nmethod(void* start);
a61af66fc99e Initial load duke parents: diff changeset	87
a61af66fc99e Initial load duke parents: diff changeset	88 // Lookup that does not fail if you lookup a zombie method (if you call this, be sure to know
a61af66fc99e Initial load duke parents: diff changeset	89 // what you are doing)
a61af66fc99e Initial load duke parents: diff changeset	90 static CodeBlob* find_blob_unsafe(void* start) {
a61af66fc99e Initial load duke parents: diff changeset	91 CodeBlob* result = (CodeBlob*)_heap->find_start(start);
107 93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	92 // this assert is too strong because the heap code will return the
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	93 // heapblock containing start. That block can often be larger than
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	94 // the codeBlob itself. If you look up an address that is within
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	95 // the heapblock but not in the codeBlob you will assert.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	96 //
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	97 // Most things will not lookup such bad addresses. However
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	98 // AsyncGetCallTrace can see intermediate frames and get that kind
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	99 // of invalid address and so can a developer using hsfind.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	100 //
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	101 // The more correct answer is to return NULL if blob_contains() returns
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	102 // false.
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	103 // assert(result == NULL \|\| result->blob_contains((address)start), "found wrong CodeBlob");
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	104
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	105 if (result != NULL && !result->blob_contains((address)start)) {
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	106 result = NULL;
93b6525e3b82 6603919: Stackwalking crash on x86 -server with Sun Studio's collect -j on sgoldman parents: 0 diff changeset	107 }
0 a61af66fc99e Initial load duke parents: diff changeset	108 return result;
a61af66fc99e Initial load duke parents: diff changeset	109 }
a61af66fc99e Initial load duke parents: diff changeset	110
a61af66fc99e Initial load duke parents: diff changeset	111 // Iteration
a61af66fc99e Initial load duke parents: diff changeset	112 static CodeBlob* first();
a61af66fc99e Initial load duke parents: diff changeset	113 static CodeBlob* next (CodeBlob* cb);
a61af66fc99e Initial load duke parents: diff changeset	114 static CodeBlob* alive(CodeBlob *cb);
a61af66fc99e Initial load duke parents: diff changeset	115 static nmethod* alive_nmethod(CodeBlob *cb);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	116 static nmethod* first_nmethod();
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	117 static nmethod* next_nmethod (CodeBlob* cb);
0 a61af66fc99e Initial load duke parents: diff changeset	118 static int nof_blobs() { return _number_of_blobs; }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1552 diff changeset	119 static int nof_adapters() { return _number_of_adapters; }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1552 diff changeset	120 static int nof_nmethods() { return _number_of_nmethods; }
0 a61af66fc99e Initial load duke parents: diff changeset	121
a61af66fc99e Initial load duke parents: diff changeset	122 // GC support
a61af66fc99e Initial load duke parents: diff changeset	123 static void gc_epilogue();
a61af66fc99e Initial load duke parents: diff changeset	124 static void gc_prologue();
a61af66fc99e Initial load duke parents: diff changeset	125 // If "unloading_occurred" is true, then unloads (i.e., breaks root links
a61af66fc99e Initial load duke parents: diff changeset	126 // to) any unmarked codeBlobs in the cache. Sets "marked_for_unloading"
a61af66fc99e Initial load duke parents: diff changeset	127 // to "true" iff some code got unloaded.
a61af66fc99e Initial load duke parents: diff changeset	128 static void do_unloading(BoolObjectClosure* is_alive,
a61af66fc99e Initial load duke parents: diff changeset	129 OopClosure* keep_alive,
a61af66fc99e Initial load duke parents: diff changeset	130 bool unloading_occurred);
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	131 static void oops_do(OopClosure* f) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	132 CodeBlobToOopClosure oopc(f, /do_marking=/ false);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	133 blobs_do(&oopc);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	134 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	135 static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	136 static void scavenge_root_nmethods_do(CodeBlobClosure* f);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	137
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	138 static nmethod* scavenge_root_nmethods() { return _scavenge_root_nmethods; }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	139 static void set_scavenge_root_nmethods(nmethod* nm) { _scavenge_root_nmethods = nm; }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	140 static void add_scavenge_root_nmethod(nmethod* nm);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	141 static void drop_scavenge_root_nmethod(nmethod* nm);
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	142 static void prune_scavenge_root_nmethods();
0 a61af66fc99e Initial load duke parents: diff changeset	143
a61af66fc99e Initial load duke parents: diff changeset	144 // Printing/debugging
a61af66fc99e Initial load duke parents: diff changeset	145 static void print() PRODUCT_RETURN; // prints summary
a61af66fc99e Initial load duke parents: diff changeset	146 static void print_internals();
a61af66fc99e Initial load duke parents: diff changeset	147 static void verify(); // verifies the code cache
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 196 diff changeset	148 static void print_trace(const char* event, CodeBlob* cb, int size = 0) PRODUCT_RETURN;
1907 1e9a9d2e6509 6970683: improvements to hs_err output never parents: 1644 diff changeset	149 static void print_bounds(outputStream* st); // Prints a summary of the bounds of the code cache
2353 1c0cf339481b 7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache kvn parents: 2091 diff changeset	150 static void log_state(outputStream* st);
0 a61af66fc99e Initial load duke parents: diff changeset	151
a61af66fc99e Initial load duke parents: diff changeset	152 // The full limits of the codeCache
a61af66fc99e Initial load duke parents: diff changeset	153 static address low_bound() { return (address) _heap->low_boundary(); }
a61af66fc99e Initial load duke parents: diff changeset	154 static address high_bound() { return (address) _heap->high_boundary(); }
a61af66fc99e Initial load duke parents: diff changeset	155
a61af66fc99e Initial load duke parents: diff changeset	156 // Profiling
a61af66fc99e Initial load duke parents: diff changeset	157 static address first_address(); // first address used for CodeBlobs
a61af66fc99e Initial load duke parents: diff changeset	158 static address last_address(); // last address used for CodeBlobs
a61af66fc99e Initial load duke parents: diff changeset	159 static size_t capacity() { return _heap->capacity(); }
a61af66fc99e Initial load duke parents: diff changeset	160 static size_t max_capacity() { return _heap->max_capacity(); }
a61af66fc99e Initial load duke parents: diff changeset	161 static size_t unallocated_capacity() { return _heap->unallocated_capacity(); }
2091 51bd2d261853 7008325: CodeCache exhausted on sparc starting from hs20b04 kvn parents: 1972 diff changeset	162 static size_t largest_free_block() { return _heap->largest_free_block(); }
2353 1c0cf339481b 7025742: Can not use CodeCache::unallocated_capacity() with fragmented CodeCache kvn parents: 2091 diff changeset	163 static bool needs_flushing() { return largest_free_block() < CodeCacheFlushingMinimumFreeSpace; }
0 a61af66fc99e Initial load duke parents: diff changeset	164
a61af66fc99e Initial load duke parents: diff changeset	165 static bool needs_cache_clean() { return _needs_cache_clean; }
a61af66fc99e Initial load duke parents: diff changeset	166 static void set_needs_cache_clean(bool v) { _needs_cache_clean = v; }
a61af66fc99e Initial load duke parents: diff changeset	167 static void clear_inline_caches(); // clear all inline caches
a61af66fc99e Initial load duke parents: diff changeset	168
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 989 diff changeset	169 static nmethod* find_and_remove_saved_code(methodOop m);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 989 diff changeset	170 static void remove_saved_code(nmethod* nm);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 989 diff changeset	171 static void speculatively_disconnect(nmethod* nm);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 989 diff changeset	172
0 a61af66fc99e Initial load duke parents: diff changeset	173 // Deoptimization
a61af66fc99e Initial load duke parents: diff changeset	174 static int mark_for_deoptimization(DepChange& changes);
a61af66fc99e Initial load duke parents: diff changeset	175 #ifdef HOTSWAP
a61af66fc99e Initial load duke parents: diff changeset	176 static int mark_for_evol_deoptimization(instanceKlassHandle dependee);
a61af66fc99e Initial load duke parents: diff changeset	177 #endif // HOTSWAP
a61af66fc99e Initial load duke parents: diff changeset	178
a61af66fc99e Initial load duke parents: diff changeset	179 static void mark_all_nmethods_for_deoptimization();
a61af66fc99e Initial load duke parents: diff changeset	180 static int mark_for_deoptimization(methodOop dependee);
a61af66fc99e Initial load duke parents: diff changeset	181 static void make_marked_nmethods_zombies();
a61af66fc99e Initial load duke parents: diff changeset	182 static void make_marked_nmethods_not_entrant();
a61af66fc99e Initial load duke parents: diff changeset	183
a61af66fc99e Initial load duke parents: diff changeset	184 // tells how many nmethods have dependencies
a61af66fc99e Initial load duke parents: diff changeset	185 static int number_of_nmethods_with_dependencies();
a61af66fc99e Initial load duke parents: diff changeset	186 };
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	187
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1907 diff changeset	188 #endif // SHARE_VM_CODE_CODECACHE_HPP

Mercurial > hg > truffle

annotate src/share/vm/code/codeCache.hpp @ 2353:1c0cf339481b