Mercurial > hg > truffle
annotate src/share/vm/utilities/debug.cpp @ 5459:ecb598b9d535
add simple test for ControlFlowGraph block computation
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Thu, 31 May 2012 18:24:53 +0200 |
parents | 09d00c18e323 |
children | 6c5b7a6becc8 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2012, 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 "classfile/systemDictionary.hpp" | |
27 #include "code/codeCache.hpp" | |
28 #include "code/icBuffer.hpp" | |
29 #include "code/nmethod.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "compiler/compileBroker.hpp" | |
32 #include "compiler/disassembler.hpp" | |
33 #include "gc_implementation/shared/markSweep.hpp" | |
34 #include "gc_interface/collectedHeap.hpp" | |
35 #include "interpreter/bytecodeHistogram.hpp" | |
36 #include "interpreter/interpreter.hpp" | |
37 #include "memory/resourceArea.hpp" | |
38 #include "memory/universe.hpp" | |
39 #include "oops/oop.inline.hpp" | |
40 #include "prims/privilegedStack.hpp" | |
41 #include "runtime/arguments.hpp" | |
42 #include "runtime/frame.hpp" | |
43 #include "runtime/java.hpp" | |
44 #include "runtime/sharedRuntime.hpp" | |
45 #include "runtime/stubCodeGenerator.hpp" | |
46 #include "runtime/stubRoutines.hpp" | |
47 #include "runtime/vframe.hpp" | |
48 #include "services/heapDumper.hpp" | |
49 #include "utilities/defaultStream.hpp" | |
50 #include "utilities/events.hpp" | |
51 #include "utilities/top.hpp" | |
52 #include "utilities/vmError.hpp" | |
53 #ifdef TARGET_OS_FAMILY_linux | |
54 # include "os_linux.inline.hpp" | |
55 # include "thread_linux.inline.hpp" | |
56 #endif | |
57 #ifdef TARGET_OS_FAMILY_solaris | |
58 # include "os_solaris.inline.hpp" | |
59 # include "thread_solaris.inline.hpp" | |
60 #endif | |
61 #ifdef TARGET_OS_FAMILY_windows | |
62 # include "os_windows.inline.hpp" | |
63 # include "thread_windows.inline.hpp" | |
64 #endif | |
3960 | 65 #ifdef TARGET_OS_FAMILY_bsd |
66 # include "os_bsd.inline.hpp" | |
67 # include "thread_bsd.inline.hpp" | |
68 #endif | |
0 | 69 |
70 #ifndef ASSERT | |
71 # ifdef _DEBUG | |
72 // NOTE: don't turn the lines below into a comment -- if you're getting | |
73 // a compile error here, change the settings to define ASSERT | |
74 ASSERT should be defined when _DEBUG is defined. It is not intended to be used for debugging | |
75 functions that do not slow down the system too much and thus can be left in optimized code. | |
76 On the other hand, the code should not be included in a production version. | |
77 # endif // _DEBUG | |
78 #endif // ASSERT | |
79 | |
80 | |
81 #ifdef _DEBUG | |
82 # ifndef ASSERT | |
83 configuration error: ASSERT must be defined in debug version | |
84 # endif // ASSERT | |
85 #endif // _DEBUG | |
86 | |
87 | |
88 #ifdef PRODUCT | |
89 # if -defined _DEBUG || -defined ASSERT | |
90 configuration error: ASSERT et al. must not be defined in PRODUCT version | |
91 # endif | |
92 #endif // PRODUCT | |
93 | |
94 | |
95 void warning(const char* format, ...) { | |
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96 if (PrintWarnings) { |
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97 // In case error happens before init or during shutdown |
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98 if (tty == NULL) ostream_init(); |
0 | 99 |
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100 tty->print("%s warning: ", VM_Version::vm_name()); |
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101 va_list ap; |
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102 va_start(ap, format); |
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103 tty->vprint_cr(format, ap); |
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104 va_end(ap); |
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105 } |
0 | 106 if (BreakAtWarning) BREAKPOINT; |
107 } | |
108 | |
109 #ifndef PRODUCT | |
110 | |
111 #define is_token_break(ch) (isspace(ch) || (ch) == ',') | |
112 | |
113 static const char* last_file_name = NULL; | |
114 static int last_line_no = -1; | |
115 | |
116 // assert/guarantee/... may happen very early during VM initialization. | |
117 // Don't rely on anything that is initialized by Threads::create_vm(). For | |
118 // example, don't use tty. | |
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119 bool error_is_suppressed(const char* file_name, int line_no) { |
0 | 120 // The following 1-element cache requires that passed-in |
121 // file names are always only constant literals. | |
122 if (file_name == last_file_name && line_no == last_line_no) return true; | |
123 | |
124 int file_name_len = (int)strlen(file_name); | |
125 char separator = os::file_separator()[0]; | |
126 const char* base_name = strrchr(file_name, separator); | |
127 if (base_name == NULL) | |
128 base_name = file_name; | |
129 | |
130 // scan the SuppressErrorAt option | |
131 const char* cp = SuppressErrorAt; | |
132 for (;;) { | |
133 const char* sfile; | |
134 int sfile_len; | |
135 int sline; | |
136 bool noisy; | |
137 while ((*cp) != '\0' && is_token_break(*cp)) cp++; | |
138 if ((*cp) == '\0') break; | |
139 sfile = cp; | |
140 while ((*cp) != '\0' && !is_token_break(*cp) && (*cp) != ':') cp++; | |
141 sfile_len = cp - sfile; | |
142 if ((*cp) == ':') cp++; | |
143 sline = 0; | |
144 while ((*cp) != '\0' && isdigit(*cp)) { | |
145 sline *= 10; | |
146 sline += (*cp) - '0'; | |
147 cp++; | |
148 } | |
149 // "file:line!" means the assert suppression is not silent | |
150 noisy = ((*cp) == '!'); | |
151 while ((*cp) != '\0' && !is_token_break(*cp)) cp++; | |
152 // match the line | |
153 if (sline != 0) { | |
154 if (sline != line_no) continue; | |
155 } | |
156 // match the file | |
157 if (sfile_len > 0) { | |
158 const char* look = file_name; | |
159 const char* look_max = file_name + file_name_len - sfile_len; | |
160 const char* foundp; | |
161 bool match = false; | |
162 while (!match | |
163 && (foundp = strchr(look, sfile[0])) != NULL | |
164 && foundp <= look_max) { | |
165 match = true; | |
166 for (int i = 1; i < sfile_len; i++) { | |
167 if (sfile[i] != foundp[i]) { | |
168 match = false; | |
169 break; | |
170 } | |
171 } | |
172 look = foundp + 1; | |
173 } | |
174 if (!match) continue; | |
175 } | |
176 // got a match! | |
177 if (noisy) { | |
178 fdStream out(defaultStream::output_fd()); | |
179 out.print_raw("[error suppressed at "); | |
180 out.print_raw(base_name); | |
181 char buf[16]; | |
182 jio_snprintf(buf, sizeof(buf), ":%d]", line_no); | |
183 out.print_raw_cr(buf); | |
184 } else { | |
185 // update 1-element cache for fast silent matches | |
186 last_file_name = file_name; | |
187 last_line_no = line_no; | |
188 } | |
189 return true; | |
190 } | |
191 | |
192 if (!is_error_reported()) { | |
193 // print a friendly hint: | |
194 fdStream out(defaultStream::output_fd()); | |
195 out.print_raw_cr("# To suppress the following error report, specify this argument"); | |
196 out.print_raw ("# after -XX: or in .hotspotrc: SuppressErrorAt="); | |
197 out.print_raw (base_name); | |
198 char buf[16]; | |
199 jio_snprintf(buf, sizeof(buf), ":%d", line_no); | |
200 out.print_raw_cr(buf); | |
201 } | |
202 return false; | |
203 } | |
204 | |
205 #undef is_token_break | |
206 | |
207 #else | |
208 | |
209 // Place-holder for non-existent suppression check: | |
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210 #define error_is_suppressed(file_name, line_no) (false) |
0 | 211 |
4006 | 212 #endif // !PRODUCT |
0 | 213 |
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214 void report_vm_error(const char* file, int line, const char* error_msg, |
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215 const char* detail_msg) |
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216 { |
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217 if (Debugging || error_is_suppressed(file, line)) return; |
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218 Thread* const thread = ThreadLocalStorage::get_thread_slow(); |
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219 VMError err(thread, file, line, error_msg, detail_msg); |
0 | 220 err.report_and_die(); |
221 } | |
222 | |
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223 void report_fatal(const char* file, int line, const char* message) |
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224 { |
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225 report_vm_error(file, line, "fatal error", message); |
0 | 226 } |
227 | |
228 // Used by report_vm_out_of_memory to detect recursion. | |
229 static jint _exiting_out_of_mem = 0; | |
230 | |
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231 void report_vm_out_of_memory(const char* file, int line, size_t size, |
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232 const char* message) { |
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233 if (Debugging) return; |
0 | 234 |
235 // We try to gather additional information for the first out of memory | |
236 // error only; gathering additional data might cause an allocation and a | |
237 // recursive out_of_memory condition. | |
238 | |
239 const jint exiting = 1; | |
240 // If we succeed in changing the value, we're the first one in. | |
241 bool first_time_here = Atomic::xchg(exiting, &_exiting_out_of_mem) != exiting; | |
242 | |
243 if (first_time_here) { | |
244 Thread* thread = ThreadLocalStorage::get_thread_slow(); | |
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245 VMError(thread, file, line, size, message).report_and_die(); |
0 | 246 } |
227
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247 |
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248 // Dump core and abort |
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249 vm_abort(true); |
0 | 250 } |
251 | |
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252 void report_should_not_call(const char* file, int line) { |
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253 report_vm_error(file, line, "ShouldNotCall()"); |
0 | 254 } |
255 | |
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256 void report_should_not_reach_here(const char* file, int line) { |
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257 report_vm_error(file, line, "ShouldNotReachHere()"); |
0 | 258 } |
259 | |
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260 void report_unimplemented(const char* file, int line) { |
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261 report_vm_error(file, line, "Unimplemented()"); |
0 | 262 } |
263 | |
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264 void report_untested(const char* file, int line, const char* message) { |
0 | 265 #ifndef PRODUCT |
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266 warning("Untested: %s in %s: %d\n", message, file, line); |
4006 | 267 #endif // !PRODUCT |
0 | 268 } |
269 | |
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270 void report_out_of_shared_space(SharedSpaceType shared_space) { |
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271 static const char* name[] = { |
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272 "permanent generation", |
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273 "shared read only space", |
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274 "shared read write space", |
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275 "shared miscellaneous data space" |
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276 }; |
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277 static const char* flag[] = { |
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278 "PermGen", |
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279 "SharedReadOnlySize", |
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280 "SharedReadWriteSize", |
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281 "SharedMiscDataSize" |
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282 }; |
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283 |
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284 warning("\nThe %s is not large enough\n" |
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285 "to preload requested classes. Use -XX:%s=\n" |
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286 "to increase the initial size of %s.\n", |
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287 name[shared_space], flag[shared_space], name[shared_space]); |
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288 exit(2); |
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289 } |
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290 |
0 | 291 void report_java_out_of_memory(const char* message) { |
292 static jint out_of_memory_reported = 0; | |
293 | |
294 // A number of threads may attempt to report OutOfMemoryError at around the | |
295 // same time. To avoid dumping the heap or executing the data collection | |
296 // commands multiple times we just do it once when the first threads reports | |
297 // the error. | |
298 if (Atomic::cmpxchg(1, &out_of_memory_reported, 0) == 0) { | |
299 // create heap dump before OnOutOfMemoryError commands are executed | |
300 if (HeapDumpOnOutOfMemoryError) { | |
301 tty->print_cr("java.lang.OutOfMemoryError: %s", message); | |
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302 HeapDumper::dump_heap_from_oome(); |
0 | 303 } |
304 | |
305 if (OnOutOfMemoryError && OnOutOfMemoryError[0]) { | |
306 VMError err(message); | |
307 err.report_java_out_of_memory(); | |
308 } | |
309 } | |
310 } | |
311 | |
312 static bool error_reported = false; | |
313 | |
314 // call this when the VM is dying--it might loosen some asserts | |
315 void set_error_reported() { | |
316 error_reported = true; | |
317 } | |
318 | |
319 bool is_error_reported() { | |
320 return error_reported; | |
321 } | |
322 | |
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323 #ifndef PRODUCT |
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324 #include <signal.h> |
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325 |
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326 void test_error_handler(size_t test_num) |
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327 { |
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328 if (test_num == 0) return; |
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329 |
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330 // If asserts are disabled, use the corresponding guarantee instead. |
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331 size_t n = test_num; |
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332 NOT_DEBUG(if (n <= 2) n += 2); |
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333 |
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334 const char* const str = "hello"; |
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335 const size_t num = (size_t)os::vm_page_size(); |
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336 |
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337 const char* const eol = os::line_separator(); |
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338 const char* const msg = "this message should be truncated during formatting"; |
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339 |
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340 // Keep this in sync with test/runtime/6888954/vmerrors.sh. |
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341 switch (n) { |
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342 case 1: assert(str == NULL, "expected null"); |
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343 case 2: assert(num == 1023 && *str == 'X', |
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344 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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345 case 3: guarantee(str == NULL, "expected null"); |
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346 case 4: guarantee(num == 1023 && *str == 'X', |
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347 err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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348 case 5: fatal("expected null"); |
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349 case 6: fatal(err_msg("num=" SIZE_FORMAT " str=\"%s\"", num, str)); |
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350 case 7: fatal(err_msg("%s%s# %s%s# %s%s# %s%s# %s%s# " |
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351 "%s%s# %s%s# %s%s# %s%s# %s%s# " |
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352 "%s%s# %s%s# %s%s# %s%s# %s", |
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353 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol, |
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354 msg, eol, msg, eol, msg, eol, msg, eol, msg, eol, |
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355 msg, eol, msg, eol, msg, eol, msg, eol, msg)); |
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356 case 8: vm_exit_out_of_memory(num, "ChunkPool::allocate"); |
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357 case 9: ShouldNotCallThis(); |
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358 case 10: ShouldNotReachHere(); |
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359 case 11: Unimplemented(); |
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360 // This is last because it does not generate an hs_err* file on Windows. |
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361 case 12: os::signal_raise(SIGSEGV); |
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362 |
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363 default: ShouldNotReachHere(); |
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364 } |
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365 } |
4006 | 366 #endif // !PRODUCT |
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367 |
0 | 368 // ------ helper functions for debugging go here ------------ |
369 | |
370 // All debug entries should be wrapped with a stack allocated | |
371 // Command object. It makes sure a resource mark is set and | |
372 // flushes the logfile to prevent file sharing problems. | |
373 | |
374 class Command : public StackObj { | |
375 private: | |
376 ResourceMark rm; | |
377 ResetNoHandleMark rnhm; | |
378 HandleMark hm; | |
379 bool debug_save; | |
380 public: | |
381 static int level; | |
382 Command(const char* str) { | |
383 debug_save = Debugging; | |
384 Debugging = true; | |
385 if (level++ > 0) return; | |
386 tty->cr(); | |
387 tty->print_cr("\"Executing %s\"", str); | |
388 } | |
389 | |
4006 | 390 ~Command() { |
391 tty->flush(); | |
392 Debugging = debug_save; | |
393 level--; | |
394 } | |
0 | 395 }; |
396 | |
397 int Command::level = 0; | |
398 | |
4006 | 399 #ifndef PRODUCT |
400 | |
0 | 401 extern "C" void blob(CodeBlob* cb) { |
402 Command c("blob"); | |
403 cb->print(); | |
404 } | |
405 | |
406 | |
407 extern "C" void dump_vtable(address p) { | |
408 Command c("dump_vtable"); | |
409 klassOop k = (klassOop)p; | |
410 instanceKlass::cast(k)->vtable()->print(); | |
411 } | |
412 | |
413 | |
414 extern "C" void nm(intptr_t p) { | |
415 // Actually we look through all CodeBlobs (the nm name has been kept for backwards compatability) | |
416 Command c("nm"); | |
417 CodeBlob* cb = CodeCache::find_blob((address)p); | |
418 if (cb == NULL) { | |
419 tty->print_cr("NULL"); | |
420 } else { | |
421 cb->print(); | |
422 } | |
423 } | |
424 | |
425 | |
426 extern "C" void disnm(intptr_t p) { | |
427 Command c("disnm"); | |
428 CodeBlob* cb = CodeCache::find_blob((address) p); | |
2008 | 429 nmethod* nm = cb->as_nmethod_or_null(); |
430 if (nm) { | |
431 nm->print(); | |
432 Disassembler::decode(nm); | |
433 } else { | |
434 cb->print(); | |
435 Disassembler::decode(cb); | |
436 } | |
0 | 437 } |
438 | |
439 | |
440 extern "C" void printnm(intptr_t p) { | |
441 char buffer[256]; | |
442 sprintf(buffer, "printnm: " INTPTR_FORMAT, p); | |
443 Command c(buffer); | |
444 CodeBlob* cb = CodeCache::find_blob((address) p); | |
445 if (cb->is_nmethod()) { | |
446 nmethod* nm = (nmethod*)cb; | |
447 nm->print_nmethod(true); | |
448 } | |
449 } | |
450 | |
451 | |
452 extern "C" void universe() { | |
453 Command c("universe"); | |
454 Universe::print(); | |
455 } | |
456 | |
457 | |
458 extern "C" void verify() { | |
459 // try to run a verify on the entire system | |
460 // note: this may not be safe if we're not at a safepoint; for debugging, | |
461 // this manipulates the safepoint settings to avoid assertion failures | |
462 Command c("universe verify"); | |
463 bool safe = SafepointSynchronize::is_at_safepoint(); | |
464 if (!safe) { | |
465 tty->print_cr("warning: not at safepoint -- verify may fail"); | |
466 SafepointSynchronize::set_is_at_safepoint(); | |
467 } | |
468 // Ensure Eden top is correct before verification | |
469 Universe::heap()->prepare_for_verify(); | |
470 Universe::verify(true); | |
471 if (!safe) SafepointSynchronize::set_is_not_at_safepoint(); | |
472 } | |
473 | |
474 | |
475 extern "C" void pp(void* p) { | |
476 Command c("pp"); | |
477 FlagSetting fl(PrintVMMessages, true); | |
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478 FlagSetting f2(DisplayVMOutput, true); |
0 | 479 if (Universe::heap()->is_in(p)) { |
480 oop obj = oop(p); | |
481 obj->print(); | |
482 } else { | |
4006 | 483 tty->print(PTR_FORMAT, p); |
0 | 484 } |
485 } | |
486 | |
487 | |
488 // pv: print vm-printable object | |
489 extern "C" void pa(intptr_t p) { ((AllocatedObj*) p)->print(); } | |
490 extern "C" void findpc(intptr_t x); | |
491 | |
4006 | 492 #endif // !PRODUCT |
493 | |
0 | 494 extern "C" void ps() { // print stack |
4006 | 495 if (Thread::current() == NULL) return; |
0 | 496 Command c("ps"); |
497 | |
498 | |
499 // Prints the stack of the current Java thread | |
500 JavaThread* p = JavaThread::active(); | |
501 tty->print(" for thread: "); | |
502 p->print(); | |
503 tty->cr(); | |
504 | |
505 if (p->has_last_Java_frame()) { | |
506 // If the last_Java_fp is set we are in C land and | |
507 // can call the standard stack_trace function. | |
4006 | 508 #ifdef PRODUCT |
509 p->print_stack(); | |
510 } else { | |
511 tty->print_cr("Cannot find the last Java frame, printing stack disabled."); | |
512 #else // !PRODUCT | |
0 | 513 p->trace_stack(); |
514 } else { | |
515 frame f = os::current_frame(); | |
516 RegisterMap reg_map(p); | |
517 f = f.sender(®_map); | |
518 tty->print("(guessing starting frame id=%#p based on current fp)\n", f.id()); | |
519 p->trace_stack_from(vframe::new_vframe(&f, ®_map, p)); | |
520 pd_ps(f); | |
4006 | 521 #endif // PRODUCT |
0 | 522 } |
523 | |
524 } | |
525 | |
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526 extern "C" void pfl() { |
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527 // print frame layout |
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528 Command c("pfl"); |
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529 JavaThread* p = JavaThread::active(); |
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530 tty->print(" for thread: "); |
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531 p->print(); |
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532 tty->cr(); |
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533 if (p->has_last_Java_frame()) { |
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534 p->print_frame_layout(); |
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535 } |
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536 } |
0 | 537 |
4006 | 538 #ifndef PRODUCT |
539 | |
0 | 540 extern "C" void psf() { // print stack frames |
541 { | |
542 Command c("psf"); | |
543 JavaThread* p = JavaThread::active(); | |
544 tty->print(" for thread: "); | |
545 p->print(); | |
546 tty->cr(); | |
547 if (p->has_last_Java_frame()) { | |
548 p->trace_frames(); | |
549 } | |
550 } | |
551 } | |
552 | |
553 | |
554 extern "C" void threads() { | |
555 Command c("threads"); | |
556 Threads::print(false, true); | |
557 } | |
558 | |
559 | |
560 extern "C" void psd() { | |
561 Command c("psd"); | |
562 SystemDictionary::print(); | |
563 } | |
564 | |
565 | |
566 extern "C" void safepoints() { | |
567 Command c("safepoints"); | |
568 SafepointSynchronize::print_state(); | |
569 } | |
570 | |
4006 | 571 #endif // !PRODUCT |
0 | 572 |
573 extern "C" void pss() { // print all stacks | |
4006 | 574 if (Thread::current() == NULL) return; |
0 | 575 Command c("pss"); |
4006 | 576 Threads::print(true, PRODUCT_ONLY(false) NOT_PRODUCT(true)); |
0 | 577 } |
578 | |
4006 | 579 #ifndef PRODUCT |
0 | 580 |
581 extern "C" void debug() { // to set things up for compiler debugging | |
582 Command c("debug"); | |
583 WizardMode = true; | |
584 PrintVMMessages = PrintCompilation = true; | |
585 PrintInlining = PrintAssembly = true; | |
586 tty->flush(); | |
587 } | |
588 | |
589 | |
590 extern "C" void ndebug() { // undo debug() | |
591 Command c("ndebug"); | |
592 PrintCompilation = false; | |
593 PrintInlining = PrintAssembly = false; | |
594 tty->flush(); | |
595 } | |
596 | |
597 | |
598 extern "C" void flush() { | |
599 Command c("flush"); | |
600 tty->flush(); | |
601 } | |
602 | |
4944 | 603 extern "C" void events() { |
604 Command c("events"); | |
605 Events::print(); | |
606 } | |
0 | 607 |
608 // Given a heap address that was valid before the most recent GC, if | |
609 // the oop that used to contain it is still live, prints the new | |
610 // location of the oop and the address. Useful for tracking down | |
611 // certain kinds of naked oop and oop map bugs. | |
612 extern "C" void pnl(intptr_t old_heap_addr) { | |
613 // Print New Location of old heap address | |
614 Command c("pnl"); | |
615 #ifndef VALIDATE_MARK_SWEEP | |
616 tty->print_cr("Requires build with VALIDATE_MARK_SWEEP defined (debug build) and RecordMarkSweepCompaction enabled"); | |
617 #else | |
618 MarkSweep::print_new_location_of_heap_address((HeapWord*) old_heap_addr); | |
619 #endif | |
620 } | |
621 | |
622 | |
623 extern "C" methodOop findm(intptr_t pc) { | |
624 Command c("findm"); | |
625 nmethod* nm = CodeCache::find_nmethod((address)pc); | |
626 return (nm == NULL) ? (methodOop)NULL : nm->method(); | |
627 } | |
628 | |
629 | |
630 extern "C" nmethod* findnm(intptr_t addr) { | |
631 Command c("findnm"); | |
632 return CodeCache::find_nmethod((address)addr); | |
633 } | |
634 | |
635 static address same_page(address x, address y) { | |
636 intptr_t page_bits = -os::vm_page_size(); | |
637 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) { | |
638 return x; | |
639 } else if (x > y) { | |
640 return (address)(intptr_t(y) | ~page_bits) + 1; | |
641 } else { | |
642 return (address)(intptr_t(y) & page_bits); | |
643 } | |
644 } | |
645 | |
646 class LookForRefInGenClosure : public OopsInGenClosure { | |
647 public: | |
648 oop target; | |
649 void do_oop(oop* o) { | |
650 if (o != NULL && *o == target) { | |
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651 tty->print_cr(INTPTR_FORMAT, o); |
0 | 652 } |
653 } | |
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654 void do_oop(narrowOop* o) { ShouldNotReachHere(); } |
0 | 655 }; |
656 | |
657 | |
658 class LookForRefInObjectClosure : public ObjectClosure { | |
659 private: | |
660 LookForRefInGenClosure look_in_object; | |
661 public: | |
662 LookForRefInObjectClosure(oop target) { look_in_object.target = target; } | |
663 void do_object(oop obj) { | |
664 obj->oop_iterate(&look_in_object); | |
665 } | |
666 }; | |
667 | |
668 | |
669 static void findref(intptr_t x) { | |
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670 CollectedHeap *ch = Universe::heap(); |
0 | 671 LookForRefInGenClosure lookFor; |
672 lookFor.target = (oop) x; | |
673 LookForRefInObjectClosure look_in_object((oop) x); | |
674 | |
675 tty->print_cr("Searching heap:"); | |
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676 ch->object_iterate(&look_in_object); |
0 | 677 |
678 tty->print_cr("Searching strong roots:"); | |
679 Universe::oops_do(&lookFor, false); | |
680 JNIHandles::oops_do(&lookFor); // Global (strong) JNI handles | |
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681 Threads::oops_do(&lookFor, NULL); |
0 | 682 ObjectSynchronizer::oops_do(&lookFor); |
683 //FlatProfiler::oops_do(&lookFor); | |
684 SystemDictionary::oops_do(&lookFor); | |
685 | |
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686 tty->print_cr("Searching code cache:"); |
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687 CodeCache::oops_do(&lookFor); |
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688 |
0 | 689 tty->print_cr("Done."); |
690 } | |
691 | |
692 class FindClassObjectClosure: public ObjectClosure { | |
693 private: | |
694 const char* _target; | |
695 public: | |
696 FindClassObjectClosure(const char name[]) { _target = name; } | |
697 | |
698 virtual void do_object(oop obj) { | |
699 if (obj->is_klass()) { | |
700 Klass* k = klassOop(obj)->klass_part(); | |
701 if (k->name() != NULL) { | |
702 ResourceMark rm; | |
703 const char* ext = k->external_name(); | |
704 if ( strcmp(_target, ext) == 0 ) { | |
705 tty->print_cr("Found " INTPTR_FORMAT, obj); | |
706 obj->print(); | |
707 } | |
708 } | |
709 } | |
710 } | |
711 }; | |
712 | |
713 // | |
714 extern "C" void findclass(const char name[]) { | |
715 Command c("findclass"); | |
716 if (name != NULL) { | |
717 tty->print_cr("Finding class %s -> ", name); | |
718 FindClassObjectClosure srch(name); | |
719 Universe::heap()->permanent_object_iterate(&srch); | |
720 } | |
721 } | |
722 | |
723 // Another interface that isn't ambiguous in dbx. | |
724 // Can we someday rename the other find to hsfind? | |
725 extern "C" void hsfind(intptr_t x) { | |
726 Command c("hsfind"); | |
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727 os::print_location(tty, x, false); |
0 | 728 } |
729 | |
730 | |
731 extern "C" void hsfindref(intptr_t x) { | |
732 Command c("hsfindref"); | |
733 findref(x); | |
734 } | |
735 | |
736 extern "C" void find(intptr_t x) { | |
737 Command c("find"); | |
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738 os::print_location(tty, x, false); |
0 | 739 } |
740 | |
741 | |
742 extern "C" void findpc(intptr_t x) { | |
743 Command c("findpc"); | |
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744 os::print_location(tty, x, true); |
0 | 745 } |
746 | |
747 | |
748 // int versions of all methods to avoid having to type type casts in the debugger | |
749 | |
750 void pp(intptr_t p) { pp((void*)p); } | |
751 void pp(oop p) { pp((void*)p); } | |
752 | |
753 void help() { | |
754 Command c("help"); | |
755 tty->print_cr("basic"); | |
756 tty->print_cr(" pp(void* p) - try to make sense of p"); | |
757 tty->print_cr(" pv(intptr_t p)- ((PrintableResourceObj*) p)->print()"); | |
758 tty->print_cr(" ps() - print current thread stack"); | |
759 tty->print_cr(" pss() - print all thread stacks"); | |
760 tty->print_cr(" pm(int pc) - print methodOop given compiled PC"); | |
761 tty->print_cr(" findm(intptr_t pc) - finds methodOop"); | |
762 tty->print_cr(" find(intptr_t x) - finds & prints nmethod/stub/bytecode/oop based on pointer into it"); | |
763 | |
764 tty->print_cr("misc."); | |
765 tty->print_cr(" flush() - flushes the log file"); | |
4944 | 766 tty->print_cr(" events() - dump events from ring buffers"); |
0 | 767 |
768 | |
769 tty->print_cr("compiler debugging"); | |
770 tty->print_cr(" debug() - to set things up for compiler debugging"); | |
771 tty->print_cr(" ndebug() - undo debug"); | |
772 } | |
773 | |
774 #if 0 | |
775 | |
776 // BobV's command parser for debugging on windows when nothing else works. | |
777 | |
778 enum CommandID { | |
779 CMDID_HELP, | |
780 CMDID_QUIT, | |
781 CMDID_HSFIND, | |
782 CMDID_PSS, | |
783 CMDID_PS, | |
784 CMDID_PSF, | |
785 CMDID_FINDM, | |
786 CMDID_FINDNM, | |
787 CMDID_PP, | |
788 CMDID_BPT, | |
789 CMDID_EXIT, | |
790 CMDID_VERIFY, | |
791 CMDID_THREADS, | |
792 CMDID_ILLEGAL = 99 | |
793 }; | |
794 | |
795 struct CommandParser { | |
796 char *name; | |
797 CommandID code; | |
798 char *description; | |
799 }; | |
800 | |
801 struct CommandParser CommandList[] = { | |
802 (char *)"help", CMDID_HELP, " Dump this list", | |
803 (char *)"quit", CMDID_QUIT, " Return from this routine", | |
804 (char *)"hsfind", CMDID_HSFIND, "Perform an hsfind on an address", | |
805 (char *)"ps", CMDID_PS, " Print Current Thread Stack Trace", | |
806 (char *)"pss", CMDID_PSS, " Print All Thread Stack Trace", | |
807 (char *)"psf", CMDID_PSF, " Print All Stack Frames", | |
808 (char *)"findm", CMDID_FINDM, " Find a methodOop from a PC", | |
809 (char *)"findnm", CMDID_FINDNM, "Find an nmethod from a PC", | |
810 (char *)"pp", CMDID_PP, " Find out something about a pointer", | |
811 (char *)"break", CMDID_BPT, " Execute a breakpoint", | |
812 (char *)"exitvm", CMDID_EXIT, "Exit the VM", | |
813 (char *)"verify", CMDID_VERIFY, "Perform a Heap Verify", | |
814 (char *)"thread", CMDID_THREADS, "Dump Info on all Threads", | |
815 (char *)0, CMDID_ILLEGAL | |
816 }; | |
817 | |
818 | |
819 // get_debug_command() | |
820 // | |
821 // Read a command from standard input. | |
822 // This is useful when you have a debugger | |
823 // which doesn't support calling into functions. | |
824 // | |
825 void get_debug_command() | |
826 { | |
827 ssize_t count; | |
828 int i,j; | |
829 bool gotcommand; | |
830 intptr_t addr; | |
831 char buffer[256]; | |
832 nmethod *nm; | |
833 methodOop m; | |
834 | |
835 tty->print_cr("You have entered the diagnostic command interpreter"); | |
836 tty->print("The supported commands are:\n"); | |
837 for ( i=0; ; i++ ) { | |
838 if ( CommandList[i].code == CMDID_ILLEGAL ) | |
839 break; | |
840 tty->print_cr(" %s \n", CommandList[i].name ); | |
841 } | |
842 | |
843 while ( 1 ) { | |
844 gotcommand = false; | |
845 tty->print("Please enter a command: "); | |
846 count = scanf("%s", buffer) ; | |
847 if ( count >=0 ) { | |
848 for ( i=0; ; i++ ) { | |
849 if ( CommandList[i].code == CMDID_ILLEGAL ) { | |
850 if (!gotcommand) tty->print("Invalid command, please try again\n"); | |
851 break; | |
852 } | |
853 if ( strcmp(buffer, CommandList[i].name) == 0 ) { | |
854 gotcommand = true; | |
855 switch ( CommandList[i].code ) { | |
856 case CMDID_PS: | |
857 ps(); | |
858 break; | |
859 case CMDID_PSS: | |
860 pss(); | |
861 break; | |
862 case CMDID_PSF: | |
863 psf(); | |
864 break; | |
865 case CMDID_FINDM: | |
866 tty->print("Please enter the hex addr to pass to findm: "); | |
867 scanf("%I64X", &addr); | |
868 m = (methodOop)findm(addr); | |
869 tty->print("findm(0x%I64X) returned 0x%I64X\n", addr, m); | |
870 break; | |
871 case CMDID_FINDNM: | |
872 tty->print("Please enter the hex addr to pass to findnm: "); | |
873 scanf("%I64X", &addr); | |
874 nm = (nmethod*)findnm(addr); | |
875 tty->print("findnm(0x%I64X) returned 0x%I64X\n", addr, nm); | |
876 break; | |
877 case CMDID_PP: | |
878 tty->print("Please enter the hex addr to pass to pp: "); | |
879 scanf("%I64X", &addr); | |
880 pp((void*)addr); | |
881 break; | |
882 case CMDID_EXIT: | |
883 exit(0); | |
884 case CMDID_HELP: | |
885 tty->print("Here are the supported commands: "); | |
886 for ( j=0; ; j++ ) { | |
887 if ( CommandList[j].code == CMDID_ILLEGAL ) | |
888 break; | |
889 tty->print_cr(" %s -- %s\n", CommandList[j].name, | |
890 CommandList[j].description ); | |
891 } | |
892 break; | |
893 case CMDID_QUIT: | |
894 return; | |
895 break; | |
896 case CMDID_BPT: | |
897 BREAKPOINT; | |
898 break; | |
899 case CMDID_VERIFY: | |
900 verify();; | |
901 break; | |
902 case CMDID_THREADS: | |
903 threads();; | |
904 break; | |
905 case CMDID_HSFIND: | |
906 tty->print("Please enter the hex addr to pass to hsfind: "); | |
907 scanf("%I64X", &addr); | |
908 tty->print("Calling hsfind(0x%I64X)\n", addr); | |
909 hsfind(addr); | |
910 break; | |
911 default: | |
912 case CMDID_ILLEGAL: | |
913 break; | |
914 } | |
915 } | |
916 } | |
917 } | |
918 } | |
919 } | |
920 #endif | |
921 | |
4006 | 922 #endif // !PRODUCT |