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annotate src/share/vm/compiler/compileLog.cpp @ 3763:e66f38dd58a9
Merge
author | ysr |
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date | Wed, 08 Jun 2011 08:39:53 -0700 |
parents | f95d63e2154a |
children | d2a62e0f25eb |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2002, 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 "ci/ciMethod.hpp" | |
27 #include "compiler/compileLog.hpp" | |
28 #include "memory/allocation.inline.hpp" | |
29 #include "oops/methodOop.hpp" | |
30 #include "runtime/mutexLocker.hpp" | |
31 #include "runtime/os.hpp" | |
0 | 32 |
33 CompileLog* CompileLog::_first = NULL; | |
34 | |
35 // ------------------------------------------------------------------ | |
36 // CompileLog::CompileLog | |
37 CompileLog::CompileLog(const char* file, FILE* fp, intx thread_id) | |
38 : _context(_context_buffer, sizeof(_context_buffer)) | |
39 { | |
40 initialize(new(ResourceObj::C_HEAP) fileStream(fp)); | |
41 _file = file; | |
42 _file_end = 0; | |
43 _thread_id = thread_id; | |
44 | |
45 _identities_limit = 0; | |
46 _identities_capacity = 400; | |
47 _identities = NEW_C_HEAP_ARRAY(char, _identities_capacity); | |
48 | |
49 // link into the global list | |
50 { MutexLocker locker(CompileTaskAlloc_lock); | |
51 _next = _first; | |
52 _first = this; | |
53 } | |
54 } | |
55 | |
56 CompileLog::~CompileLog() { | |
57 delete _out; | |
58 _out = NULL; | |
59 FREE_C_HEAP_ARRAY(char, _identities); | |
60 } | |
61 | |
62 | |
63 // Advance kind up to a null or space, return this tail. | |
64 // Make sure kind is null-terminated, not space-terminated. | |
65 // Use the buffer if necessary. | |
66 static const char* split_attrs(const char* &kind, char* buffer) { | |
67 const char* attrs = strchr(kind, ' '); | |
68 // Tease apart the first word from the rest: | |
69 if (attrs == NULL) { | |
70 return ""; // no attrs, no split | |
71 } else if (kind == buffer) { | |
72 ((char*) attrs)[-1] = 0; | |
73 return attrs; | |
74 } else { | |
75 // park it in the buffer, so we can put a null on the end | |
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76 assert(!(kind >= buffer && kind < buffer+100), "not obviously in buffer"); |
0 | 77 int klen = attrs - kind; |
78 strncpy(buffer, kind, klen); | |
79 buffer[klen] = 0; | |
80 kind = buffer; // return by reference | |
81 return attrs; | |
82 } | |
83 } | |
84 | |
85 // see_tag, pop_tag: Override the default do-nothing methods on xmlStream. | |
86 // These methods provide a hook for managing the the extra context markup. | |
87 void CompileLog::see_tag(const char* tag, bool push) { | |
88 if (_context.size() > 0 && _out != NULL) { | |
89 _out->write(_context.base(), _context.size()); | |
90 _context.reset(); | |
91 } | |
92 xmlStream::see_tag(tag, push); | |
93 } | |
94 void CompileLog::pop_tag(const char* tag) { | |
95 _context.reset(); // toss any context info. | |
96 xmlStream::pop_tag(tag); | |
97 } | |
98 | |
99 | |
100 // ------------------------------------------------------------------ | |
101 // CompileLog::identify | |
102 int CompileLog::identify(ciObject* obj) { | |
103 if (obj == NULL) return 0; | |
104 int id = obj->ident(); | |
105 if (id < 0) return id; | |
106 // If it has already been identified, just return the id. | |
107 if (id < _identities_limit && _identities[id] != 0) return id; | |
108 // Lengthen the array, if necessary. | |
109 if (id >= _identities_capacity) { | |
110 int new_cap = _identities_capacity * 2; | |
111 if (new_cap <= id) new_cap = id + 100; | |
112 _identities = REALLOC_C_HEAP_ARRAY(char, _identities, new_cap); | |
113 _identities_capacity = new_cap; | |
114 } | |
115 while (id >= _identities_limit) { | |
116 _identities[_identities_limit++] = 0; | |
117 } | |
118 assert(id < _identities_limit, "oob"); | |
119 // Mark this id as processed. | |
120 // (Be sure to do this before any recursive calls to identify.) | |
121 _identities[id] = 1; // mark | |
122 | |
123 // Now, print the object's identity once, in detail. | |
124 if (obj->is_klass()) { | |
125 ciKlass* klass = obj->as_klass(); | |
126 begin_elem("klass id='%d'", id); | |
127 name(klass->name()); | |
128 if (!klass->is_loaded()) { | |
129 print(" unloaded='1'"); | |
130 } else { | |
131 print(" flags='%d'", klass->modifier_flags()); | |
132 } | |
133 end_elem(); | |
134 } else if (obj->is_method()) { | |
135 ciMethod* method = obj->as_method(); | |
136 ciSignature* sig = method->signature(); | |
137 // Pre-identify items that we will need! | |
138 identify(sig->return_type()); | |
139 for (int i = 0; i < sig->count(); i++) { | |
140 identify(sig->type_at(i)); | |
141 } | |
142 begin_elem("method id='%d' holder='%d'", | |
143 id, identify(method->holder())); | |
144 name(method->name()); | |
145 print(" return='%d'", identify(sig->return_type())); | |
146 if (sig->count() > 0) { | |
147 print(" arguments='"); | |
148 for (int i = 0; i < sig->count(); i++) { | |
149 print((i == 0) ? "%d" : " %d", identify(sig->type_at(i))); | |
150 } | |
151 print("'"); | |
152 } | |
153 if (!method->is_loaded()) { | |
154 print(" unloaded='1'"); | |
155 } else { | |
156 print(" flags='%d'", (jchar) method->flags().as_int()); | |
157 // output a few metrics | |
158 print(" bytes='%d'", method->code_size()); | |
159 method->log_nmethod_identity(this); | |
160 //print(" count='%d'", method->invocation_count()); | |
161 //int bec = method->backedge_count(); | |
162 //if (bec != 0) print(" backedge_count='%d'", bec); | |
163 print(" iicount='%d'", method->interpreter_invocation_count()); | |
164 } | |
165 end_elem(); | |
166 } else if (obj->is_symbol()) { | |
167 begin_elem("symbol id='%d'", id); | |
168 name(obj->as_symbol()); | |
169 end_elem(); | |
170 } else if (obj->is_null_object()) { | |
171 elem("null_object id='%d'", id); | |
172 } else if (obj->is_type()) { | |
173 BasicType type = obj->as_type()->basic_type(); | |
174 elem("type id='%d' name='%s'", id, type2name(type)); | |
175 } else { | |
176 // Should not happen. | |
177 elem("unknown id='%d'", id); | |
178 } | |
179 return id; | |
180 } | |
181 | |
182 void CompileLog::name(ciSymbol* name) { | |
183 if (name == NULL) return; | |
184 print(" name='"); | |
185 name->print_symbol_on(text()); // handles quoting conventions | |
186 print("'"); | |
187 } | |
188 | |
189 | |
190 // ------------------------------------------------------------------ | |
191 // CompileLog::clear_identities | |
192 // Forget which identities have been printed. | |
193 void CompileLog::clear_identities() { | |
194 _identities_limit = 0; | |
195 } | |
196 | |
197 // ------------------------------------------------------------------ | |
198 // CompileLog::finish_log_on_error | |
199 // | |
200 // Note: This function is called after fatal error, avoid unnecessary memory | |
201 // or stack allocation, use only async-safe functions. It's possible JVM is | |
202 // only partially initialized. | |
203 void CompileLog::finish_log_on_error(outputStream* file, char* buf, int buflen) { | |
204 static bool called_exit = false; | |
205 if (called_exit) return; | |
206 called_exit = true; | |
207 | |
208 for (CompileLog* log = _first; log != NULL; log = log->_next) { | |
209 log->flush(); | |
210 const char* partial_file = log->file(); | |
211 int partial_fd = open(partial_file, O_RDONLY); | |
212 if (partial_fd != -1) { | |
213 // print/print_cr may need to allocate large stack buffer to format | |
214 // strings, here we use snprintf() and print_raw() instead. | |
215 file->print_raw("<compilation_log thread='"); | |
216 jio_snprintf(buf, buflen, UINTX_FORMAT, log->thread_id()); | |
217 file->print_raw(buf); | |
218 file->print_raw_cr("'>"); | |
219 | |
220 size_t nr; // number read into buf from partial log | |
221 // Copy data up to the end of the last <event> element: | |
222 julong to_read = log->_file_end; | |
223 while (to_read > 0) { | |
224 if (to_read < (julong)buflen) | |
225 nr = (size_t)to_read; | |
226 else nr = buflen; | |
227 nr = read(partial_fd, buf, (int)nr); | |
228 if (nr <= 0) break; | |
229 to_read -= (julong)nr; | |
230 file->write(buf, nr); | |
231 } | |
232 | |
233 // Copy any remaining data inside a quote: | |
234 bool saw_slop = false; | |
235 int end_cdata = 0; // state machine [0..2] watching for too many "]]" | |
236 while ((nr = read(partial_fd, buf, buflen)) > 0) { | |
237 if (!saw_slop) { | |
238 file->print_raw_cr("<fragment>"); | |
239 file->print_raw_cr("<![CDATA["); | |
240 saw_slop = true; | |
241 } | |
242 // The rest of this loop amounts to a simple copy operation: | |
243 // { file->write(buf, nr); } | |
244 // However, it must sometimes output the buffer in parts, | |
245 // in case there is a CDATA quote embedded in the fragment. | |
246 const char* bufp; // pointer into buf | |
247 size_t nw; // number written in each pass of the following loop: | |
248 for (bufp = buf; nr > 0; nr -= nw, bufp += nw) { | |
249 // Write up to any problematic CDATA delimiter (usually all of nr). | |
250 for (nw = 0; nw < nr; nw++) { | |
251 // First, scan ahead into the buf, checking the state machine. | |
252 switch (bufp[nw]) { | |
253 case ']': | |
254 if (end_cdata < 2) end_cdata += 1; // saturating counter | |
255 continue; // keep scanning | |
256 case '>': | |
257 if (end_cdata == 2) break; // found CDATA delimiter! | |
258 // else fall through: | |
259 default: | |
260 end_cdata = 0; | |
261 continue; // keep scanning | |
262 } | |
263 // If we get here, nw is pointing at a bad '>'. | |
264 // It is very rare for this to happen. | |
265 // However, this code has been tested by introducing | |
266 // CDATA sequences into the compilation log. | |
267 break; | |
268 } | |
269 // Now nw is the number of characters to write, usually == nr. | |
270 file->write(bufp, nw); | |
271 if (nw < nr) { | |
272 // We are about to go around the loop again. | |
273 // But first, disrupt the ]]> by closing and reopening the quote. | |
274 file->print_raw("]]><![CDATA["); | |
275 end_cdata = 0; // reset state machine | |
276 } | |
277 } | |
278 } | |
279 if (saw_slop) { | |
280 file->print_raw_cr("]]>"); | |
281 file->print_raw_cr("</fragment>"); | |
282 } | |
283 file->print_raw_cr("</compilation_log>"); | |
284 close(partial_fd); | |
285 unlink(partial_file); | |
286 } | |
287 } | |
288 } | |
289 | |
290 // ------------------------------------------------------------------ | |
291 // CompileLog::finish_log | |
292 // | |
293 // Called during normal shutdown. For now, any clean-up needed in normal | |
294 // shutdown is also needed in VM abort, so is covered by finish_log_on_error(). | |
295 // Just allocate a buffer and call finish_log_on_error(). | |
296 void CompileLog::finish_log(outputStream* file) { | |
297 char buf[4 * K]; | |
298 finish_log_on_error(file, buf, sizeof(buf)); | |
299 } |