1 /*
2 * Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "jvm.h"
27 #include "ci/ciMethod.hpp"
28 #include "code/codeCache.hpp"
29 #include "compiler/compileLog.hpp"
30 #include "memory/allocation.inline.hpp"
31 #include "oops/method.hpp"
32 #include "runtime/mutexLocker.hpp"
33 #include "runtime/os.hpp"
34
35 CompileLog* CompileLog::_first = NULL;
36
37 // ------------------------------------------------------------------
38 // CompileLog::CompileLog
39 CompileLog::CompileLog(const char* file_name, FILE* fp, intx thread_id)
40 : _context(_context_buffer, sizeof(_context_buffer))
41 {
42 initialize(new(ResourceObj::C_HEAP, mtCompiler) fileStream(fp, true));
43 _file_end = 0;
44 _thread_id = thread_id;
45
46 _identities_limit = 0;
47 _identities_capacity = 400;
48 _identities = NEW_C_HEAP_ARRAY(char, _identities_capacity, mtCompiler);
49 _file = NEW_C_HEAP_ARRAY(char, strlen(file_name)+1, mtCompiler);
50 strcpy((char*)_file, file_name);
51
52 // link into the global list
53 { MutexLocker locker(CompileTaskAlloc_lock);
54 _next = _first;
55 _first = this;
56 }
57 }
58
59 CompileLog::~CompileLog() {
60 delete _out; // Close fd in fileStream::~fileStream()
61 _out = NULL;
62 // Remove partial file after merging in CompileLog::finish_log_on_error
63 unlink(_file);
64 FREE_C_HEAP_ARRAY(char, _identities);
65 FREE_C_HEAP_ARRAY(char, _file);
66 }
67
68
69 // see_tag, pop_tag: Override the default do-nothing methods on xmlStream.
70 // These methods provide a hook for managing the extra context markup.
71 void CompileLog::see_tag(const char* tag, bool push) {
72 if (_context.size() > 0 && _out != NULL) {
73 _out->write(_context.base(), _context.size());
74 _context.reset();
75 }
76 xmlStream::see_tag(tag, push);
77 }
78 void CompileLog::pop_tag(const char* tag) {
79 _context.reset(); // toss any context info.
80 xmlStream::pop_tag(tag);
81 }
82
83
84 // ------------------------------------------------------------------
85 // CompileLog::identify
86 int CompileLog::identify(ciBaseObject* obj) {
87 if (obj == NULL) return 0;
88 int id = obj->ident();
89 if (id < 0) return id;
90 // If it has already been identified, just return the id.
91 if (id < _identities_limit && _identities[id] != 0) return id;
92 // Lengthen the array, if necessary.
93 if (id >= _identities_capacity) {
94 int new_cap = _identities_capacity * 2;
95 if (new_cap <= id) new_cap = id + 100;
96 _identities = REALLOC_C_HEAP_ARRAY(char, _identities, new_cap, mtCompiler);
97 _identities_capacity = new_cap;
98 }
99 while (id >= _identities_limit) {
100 _identities[_identities_limit++] = 0;
101 }
102 assert(id < _identities_limit, "oob");
103 // Mark this id as processed.
104 // (Be sure to do this before any recursive calls to identify.)
105 _identities[id] = 1; // mark
106
107 // Now, print the object's identity once, in detail.
108 if (obj->is_metadata()) {
109 ciMetadata* mobj = obj->as_metadata();
110 if (mobj->is_klass()) {
111 ciKlass* klass = mobj->as_klass();
112 begin_elem("klass id='%d'", id);
113 name(klass);
114 if (!klass->is_loaded()) {
115 print(" unloaded='1'");
116 } else {
117 print(" flags='%d'", klass->modifier_flags());
118 }
119 end_elem();
120 } else if (mobj->is_method()) {
121 ciMethod* method = mobj->as_method();
122 ciSignature* sig = method->signature();
123 // Pre-identify items that we will need!
124 identify(sig->return_type());
125 for (int i = 0; i < sig->count(); i++) {
126 identify(sig->type_at(i));
127 }
128 begin_elem("method id='%d' holder='%d'",
129 id, identify(method->holder()));
130 name(method->name());
131 print(" return='%d'", identify(sig->return_type()));
132 if (sig->count() > 0) {
133 print(" arguments='");
134 for (int i = 0; i < sig->count(); i++) {
135 print((i == 0) ? "%d" : " %d", identify(sig->type_at(i)));
136 }
137 print("'");
138 }
139 if (!method->is_loaded()) {
140 print(" unloaded='1'");
141 } else {
142 print(" flags='%d'", (jchar) method->flags().as_int());
143 // output a few metrics
144 print(" bytes='%d'", method->code_size());
145 method->log_nmethod_identity(this);
146 //print(" count='%d'", method->invocation_count());
147 //int bec = method->backedge_count();
148 //if (bec != 0) print(" backedge_count='%d'", bec);
149 print(" iicount='%d'", method->interpreter_invocation_count());
150 }
151 end_elem();
152 } else if (mobj->is_type()) {
153 BasicType type = mobj->as_type()->basic_type();
154 elem("type id='%d' name='%s'", id, type2name(type));
155 } else {
156 // Should not happen.
157 elem("unknown id='%d'", id);
158 ShouldNotReachHere();
159 }
160 } else if (obj->is_symbol()) {
161 begin_elem("symbol id='%d'", id);
162 name(obj->as_symbol());
163 end_elem();
164 } else {
165 // Should not happen.
166 elem("unknown id='%d'", id);
167 }
168 return id;
169 }
170
171 void CompileLog::name(ciSymbol* name) {
172 if (name == NULL) return;
173 print(" name='");
174 name->print_symbol_on(text()); // handles quoting conventions
175 print("'");
176 }
177
178 void CompileLog::name(ciKlass* k) {
179 print(" name='");
180 if (!k->is_loaded()) {
181 text()->print("%s", k->name()->as_klass_external_name());
182 } else {
183 text()->print("%s", k->external_name());
184 }
185 print("'");
186 }
187
188 // ------------------------------------------------------------------
189 // CompileLog::clear_identities
190 // Forget which identities have been printed.
191 void CompileLog::clear_identities() {
192 _identities_limit = 0;
193 }
194
195 // ------------------------------------------------------------------
196 // CompileLog::finish_log_on_error
197 //
198 // Note: This function is called after fatal error, avoid unnecessary memory
199 // or stack allocation, use only async-safe functions. It's possible JVM is
200 // only partially initialized.
201 void CompileLog::finish_log_on_error(outputStream* file, char* buf, int buflen) {
202 static bool called_exit = false;
203 if (called_exit) return;
204 called_exit = true;
205
206 CompileLog* log = _first;
207 while (log != NULL) {
208 log->flush();
209 const char* partial_file = log->file();
210 int partial_fd = open(partial_file, O_RDONLY);
211 if (partial_fd != -1) {
212 // print/print_cr may need to allocate large stack buffer to format
213 // strings, here we use snprintf() and print_raw() instead.
214 file->print_raw("<compilation_log thread='");
215 jio_snprintf(buf, buflen, UINTX_FORMAT, log->thread_id());
216 file->print_raw(buf);
217 file->print_raw_cr("'>");
218
219 size_t nr; // number read into buf from partial log
220 // In case of unsuccessful completion, read returns -1.
221 ssize_t bytes_read;
222 // Copy data up to the end of the last <event> element:
223 julong to_read = log->_file_end;
224 while (to_read > 0) {
225 if (to_read < (julong)buflen)
226 nr = (size_t)to_read;
227 else nr = buflen;
228 bytes_read = read(partial_fd, buf, (int)nr);
229 if (bytes_read <= 0) break;
230 nr = bytes_read;
231 to_read -= (julong)nr;
232 file->write(buf, nr);
233 }
234
235 // Copy any remaining data inside a quote:
236 bool saw_slop = false;
237 int end_cdata = 0; // state machine [0..2] watching for too many "]]"
238 while ((bytes_read = read(partial_fd, buf, buflen-1)) > 0) {
239 nr = bytes_read;
240 buf[buflen-1] = '\0';
241 if (!saw_slop) {
242 file->print_raw_cr("<fragment>");
243 file->print_raw_cr("<![CDATA[");
244 saw_slop = true;
245 }
246 // The rest of this loop amounts to a simple copy operation:
247 // { file->write(buf, nr); }
248 // However, it must sometimes output the buffer in parts,
249 // in case there is a CDATA quote embedded in the fragment.
250 const char* bufp; // pointer into buf
251 size_t nw; // number written in each pass of the following loop:
252 for (bufp = buf; nr > 0; nr -= nw, bufp += nw) {
253 // Write up to any problematic CDATA delimiter (usually all of nr).
254 for (nw = 0; nw < nr; nw++) {
255 // First, scan ahead into the buf, checking the state machine.
256 switch (bufp[nw]) {
257 case ']':
258 if (end_cdata < 2) end_cdata += 1; // saturating counter
259 continue; // keep scanning
260 case '>':
261 if (end_cdata == 2) break; // found CDATA delimiter!
262 // else fall through:
263 default:
264 end_cdata = 0;
265 continue; // keep scanning
266 }
267 // If we get here, nw is pointing at a bad '>'.
268 // It is very rare for this to happen.
269 // However, this code has been tested by introducing
270 // CDATA sequences into the compilation log.
271 break;
272 }
273 // Now nw is the number of characters to write, usually == nr.
274 file->write(bufp, nw);
275 if (nw < nr) {
276 // We are about to go around the loop again.
277 // But first, disrupt the ]]> by closing and reopening the quote.
278 file->print_raw("]]><![CDATA[");
279 end_cdata = 0; // reset state machine
280 }
281 }
282 }
283 if (saw_slop) {
284 file->print_raw_cr("]]>");
285 file->print_raw_cr("</fragment>");
286 }
287 file->print_raw_cr("</compilation_log>");
288 close(partial_fd);
289 }
290 CompileLog* next_log = log->_next;
291 delete log; // Removes partial file
292 log = next_log;
293 }
294 _first = NULL;
295 }
296
297 // ------------------------------------------------------------------
298 // CompileLog::finish_log
299 //
300 // Called during normal shutdown. For now, any clean-up needed in normal
301 // shutdown is also needed in VM abort, so is covered by finish_log_on_error().
302 // Just allocate a buffer and call finish_log_on_error().
303 void CompileLog::finish_log(outputStream* file) {
304 char buf[4 * K];
305 finish_log_on_error(file, buf, sizeof(buf));
306 }
307
308 // ------------------------------------------------------------------
309 // CompileLog::inline_success
310 //
311 // Print about successful method inlining.
312 void CompileLog::inline_success(const char* reason) {
313 begin_elem("inline_success reason='");
314 text("%s", reason);
315 end_elem("'");
316 }
317
318 // ------------------------------------------------------------------
319 // CompileLog::inline_fail
320 //
321 // Print about failed method inlining.
322 void CompileLog::inline_fail(const char* reason) {
323 begin_elem("inline_fail reason='");
324 text("%s", reason);
325 end_elem("'");
326 }
327
328 // ------------------------------------------------------------------
329 // CompileLog::set_context
330 //
331 // Set XML tag as an optional marker - it is printed only if
332 // there are other entries after until it is reset.
333 void CompileLog::set_context(const char* format, ...) {
334 va_list ap;
335 va_start(ap, format);
336 clear_context();
337 _context.print("<");
338 _context.vprint(format, ap);
339 _context.print_cr("/>");
340 va_end(ap);
341 }
342
343 // ------------------------------------------------------------------
344 // CompileLog::code_cache_state
345 //
346 // Print code cache state.
347 void CompileLog::code_cache_state() {
348 begin_elem("code_cache");
349 CodeCache::log_state(this);
350 end_elem("%s", "");
351 }