Mercurial > hg > truffle
annotate src/os/solaris/dtrace/libjvm_db.c @ 2704:efbdb3ea95c9
Remove critical edge split identification.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
---|---|
date | Wed, 18 May 2011 17:27:06 +0200 |
parents | 1d1603768966 |
children | 2fe087c3e814 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2011, 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 | |
25 #include <stdio.h> | |
26 #include <stdlib.h> | |
27 #include <string.h> | |
28 #include <errno.h> | |
29 #include <gelf.h> | |
30 | |
31 #include "libjvm_db.h" | |
32 #include "JvmOffsets.h" | |
33 | |
34 #define LIBJVM_SO "libjvm.so" | |
35 | |
36 #if defined(i386) || defined(__i386) || defined(__amd64) | |
37 #ifdef COMPILER2 | |
38 #define X86_COMPILER2 | |
39 #endif /* COMPILER2 */ | |
40 #endif /* i386 */ | |
41 | |
42 typedef struct { | |
43 short vf_cnt; /* number of recognized java vframes */ | |
44 short bci; /* current frame method byte code index */ | |
45 int line; /* current frame method source line */ | |
46 uint64_t new_fp; /* fp for the next frame */ | |
47 uint64_t new_pc; /* pc for the next frame */ | |
48 uint64_t new_sp; /* "raw" sp for the next frame (includes extension by interpreter/adapter */ | |
49 char locinf; /* indicates there is valid location info */ | |
50 } Jframe_t; | |
51 | |
52 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name, | |
53 size_t size, Jframe_t *jframe); | |
54 | |
55 int main(int arg) { return arg; } | |
56 | |
57 static int debug = 0; | |
58 | |
59 static void failed(int err, const char * file, int line) { | |
60 if (debug) { | |
61 fprintf(stderr, "failed %d at %s:%d\n", err, file, line); | |
62 } | |
63 } | |
64 | |
65 static void warn(const char * file, int line, const char * msg) { | |
66 if (debug) { | |
67 fprintf(stderr, "warning: %s at %s:%d\n", msg, file, line); | |
68 } | |
69 } | |
70 | |
71 static void warn1(const char * file, int line, const char * msg, intptr_t arg1) { | |
72 if (debug) { | |
73 fprintf(stderr, "warning: "); | |
74 fprintf(stderr, msg, arg1); | |
75 fprintf(stderr, " at %s:%d\n", file, line); | |
76 } | |
77 } | |
78 | |
79 #define CHECK_FAIL(err) \ | |
80 if (err != PS_OK) { failed(err, __FILE__, __LINE__); goto fail; } | |
81 #define WARN(msg) warn(__FILE__, __LINE__, msg) | |
82 #define WARN1(msg, arg1) warn1(__FILE__, __LINE__, msg, arg1) | |
83 | |
84 typedef struct VMStructEntry { | |
85 const char * typeName; /* The type name containing the given field (example: "Klass") */ | |
86 const char * fieldName; /* The field name within the type (example: "_name") */ | |
87 uint64_t address; /* Address of field; only used for static fields */ | |
88 /* ("offset" can not be reused because of apparent SparcWorks compiler bug */ | |
89 /* in generation of initializer data) */ | |
90 } VMStructEntry; | |
91 | |
92 /* Prototyping inlined methods */ | |
93 | |
94 int sprintf(char *s, const char *format, ...); | |
95 | |
96 #define SZ16 sizeof(int16_t) | |
97 #define SZ32 sizeof(int32_t) | |
98 | |
99 #define COMP_METHOD_SIGN '*' | |
100 | |
101 #define MAX_VFRAMES_CNT 256 | |
102 | |
103 typedef struct vframe { | |
104 uint64_t methodOop; | |
105 int32_t sender_decode_offset; | |
106 int32_t methodIdx; | |
107 int32_t bci; | |
108 int32_t line; | |
109 } Vframe_t; | |
110 | |
111 typedef struct frame { | |
112 uintptr_t fp; | |
113 uintptr_t pc; | |
114 uintptr_t sp; | |
115 uintptr_t sender_sp; // The unextended sp of the caller | |
116 } Frame_t; | |
117 | |
118 typedef struct Nmethod_t { | |
119 struct jvm_agent* J; | |
120 Jframe_t *jframe; | |
121 | |
122 uint64_t nm; /* _nmethod */ | |
123 uint64_t pc; | |
124 uint64_t pc_desc; | |
125 | |
126 int32_t orig_pc_offset; /* _orig_pc_offset */ | |
1748 | 127 int32_t instrs_beg; /* _code_offset */ |
0 | 128 int32_t instrs_end; |
129 int32_t deopt_beg; /* _deoptimize_offset */ | |
130 int32_t scopes_data_beg; /* _scopes_data_offset */ | |
131 int32_t scopes_data_end; | |
132 int32_t oops_beg; /* _oops_offset */ | |
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133 int32_t oops_end; |
0 | 134 int32_t scopes_pcs_beg; /* _scopes_pcs_offset */ |
135 int32_t scopes_pcs_end; | |
136 | |
137 int vf_cnt; | |
138 Vframe_t vframes[MAX_VFRAMES_CNT]; | |
139 } Nmethod_t; | |
140 | |
141 struct jvm_agent { | |
142 struct ps_prochandle* P; | |
143 | |
144 uint64_t nmethod_vtbl; | |
145 uint64_t CodeBlob_vtbl; | |
146 uint64_t BufferBlob_vtbl; | |
147 uint64_t RuntimeStub_vtbl; | |
148 | |
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149 uint64_t Use_Compressed_Oops_address; |
0 | 150 uint64_t Universe_methodKlassObj_address; |
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151 uint64_t Universe_narrow_oop_base_address; |
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152 uint64_t Universe_narrow_oop_shift_address; |
0 | 153 uint64_t CodeCache_heap_address; |
154 | |
155 /* Volatiles */ | |
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156 uint8_t Use_Compressed_Oops; |
0 | 157 uint64_t Universe_methodKlassObj; |
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158 uint64_t Universe_narrow_oop_base; |
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159 uint32_t Universe_narrow_oop_shift; |
0 | 160 uint64_t CodeCache_low; |
161 uint64_t CodeCache_high; | |
162 uint64_t CodeCache_segmap_low; | |
163 uint64_t CodeCache_segmap_high; | |
164 | |
165 int32_t SIZE_CodeCache_log2_segment; | |
166 | |
167 uint64_t methodOopPtr; | |
168 uint64_t bcx; | |
169 | |
170 Nmethod_t *N; /*Inlined methods support */ | |
171 Frame_t prev_fr; | |
172 Frame_t curr_fr; | |
173 }; | |
174 | |
175 static int | |
176 read_string(struct ps_prochandle *P, | |
177 char *buf, /* caller's buffer */ | |
178 size_t size, /* upper limit on bytes to read */ | |
179 uintptr_t addr) /* address in process */ | |
180 { | |
181 int err = PS_OK; | |
182 while (size-- > 1 && err == PS_OK) { | |
183 err = ps_pread(P, addr, buf, 1); | |
184 if (*buf == '\0') { | |
185 return PS_OK; | |
186 } | |
187 addr += 1; | |
188 buf += 1; | |
189 } | |
190 return -1; | |
191 } | |
192 | |
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193 static int read_compressed_pointer(jvm_agent_t* J, uint64_t base, uint32_t *ptr) { |
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194 int err = -1; |
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195 uint32_t ptr32; |
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196 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t)); |
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197 *ptr = ptr32; |
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198 return err; |
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199 } |
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200 |
0 | 201 static int read_pointer(jvm_agent_t* J, uint64_t base, uint64_t* ptr) { |
202 int err = -1; | |
203 uint32_t ptr32; | |
204 | |
205 switch (DATA_MODEL) { | |
206 case PR_MODEL_LP64: | |
207 err = ps_pread(J->P, base, ptr, sizeof(uint64_t)); | |
208 break; | |
209 case PR_MODEL_ILP32: | |
210 err = ps_pread(J->P, base, &ptr32, sizeof(uint32_t)); | |
211 *ptr = ptr32; | |
212 break; | |
213 } | |
214 | |
215 return err; | |
216 } | |
217 | |
218 static int read_string_pointer(jvm_agent_t* J, uint64_t base, const char ** stringp) { | |
219 uint64_t ptr; | |
220 int err; | |
221 char buffer[1024]; | |
222 | |
223 *stringp = NULL; | |
224 err = read_pointer(J, base, &ptr); | |
225 CHECK_FAIL(err); | |
226 if (ptr != 0) { | |
227 err = read_string(J->P, buffer, sizeof(buffer), ptr); | |
228 CHECK_FAIL(err); | |
229 *stringp = strdup(buffer); | |
230 } | |
231 return PS_OK; | |
232 | |
233 fail: | |
234 return err; | |
235 } | |
236 | |
237 static int parse_vmstruct_entry(jvm_agent_t* J, uint64_t base, VMStructEntry* vmp) { | |
238 uint64_t ptr; | |
239 int err; | |
240 | |
241 err = read_string_pointer(J, base + OFFSET_VMStructEntrytypeName, &vmp->typeName); | |
242 CHECK_FAIL(err); | |
243 err = read_string_pointer(J, base + OFFSET_VMStructEntryfieldName, &vmp->fieldName); | |
244 CHECK_FAIL(err); | |
245 err = read_pointer(J, base + OFFSET_VMStructEntryaddress, &vmp->address); | |
246 CHECK_FAIL(err); | |
247 | |
248 return PS_OK; | |
249 | |
250 fail: | |
251 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
252 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
253 return err; | |
254 } | |
255 | |
256 static int parse_vmstructs(jvm_agent_t* J) { | |
257 VMStructEntry vmVar; | |
258 VMStructEntry* vmp = &vmVar; | |
259 uint64_t gHotSpotVMStructs; | |
260 psaddr_t sym_addr; | |
261 uint64_t base; | |
262 int err; | |
263 | |
264 err = ps_pglobal_lookup(J->P, LIBJVM_SO, "gHotSpotVMStructs", &sym_addr); | |
265 CHECK_FAIL(err); | |
266 err = read_pointer(J, sym_addr, &gHotSpotVMStructs); | |
267 CHECK_FAIL(err); | |
268 base = gHotSpotVMStructs; | |
269 | |
270 err = PS_OK; | |
271 while (err == PS_OK) { | |
272 memset(vmp, 0, sizeof(VMStructEntry)); | |
273 err = parse_vmstruct_entry(J, base, vmp); | |
274 if (err != PS_OK || vmp->typeName == NULL) { | |
275 break; | |
276 } | |
277 | |
278 if (vmp->typeName[0] == 'C' && strcmp("CodeCache", vmp->typeName) == 0) { | |
279 if (strcmp("_heap", vmp->fieldName) == 0) { | |
280 err = read_pointer(J, vmp->address, &J->CodeCache_heap_address); | |
281 } | |
282 } else if (vmp->typeName[0] == 'U' && strcmp("Universe", vmp->typeName) == 0) { | |
283 if (strcmp("_methodKlassObj", vmp->fieldName) == 0) { | |
284 J->Universe_methodKlassObj_address = vmp->address; | |
285 } | |
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286 if (strcmp("_narrow_oop._base", vmp->fieldName) == 0) { |
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287 J->Universe_narrow_oop_base_address = vmp->address; |
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288 } |
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289 if (strcmp("_narrow_oop._shift", vmp->fieldName) == 0) { |
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290 J->Universe_narrow_oop_shift_address = vmp->address; |
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291 } |
0 | 292 } |
293 CHECK_FAIL(err); | |
294 | |
295 base += SIZE_VMStructEntry; | |
296 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
297 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
298 } | |
299 | |
300 return PS_OK; | |
301 | |
302 fail: | |
303 if (vmp->typeName != NULL) free((void*)vmp->typeName); | |
304 if (vmp->fieldName != NULL) free((void*)vmp->fieldName); | |
305 return -1; | |
306 } | |
307 | |
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308 static int find_symbol(jvm_agent_t* J, const char *name, uint64_t* valuep) { |
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309 psaddr_t sym_addr; |
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310 int err; |
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311 |
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312 err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr); |
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313 if (err != PS_OK) goto fail; |
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314 *valuep = sym_addr; |
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315 return PS_OK; |
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316 |
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317 fail: |
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318 return err; |
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319 } |
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320 |
0 | 321 static int read_volatiles(jvm_agent_t* J) { |
322 uint64_t ptr; | |
323 int err; | |
324 | |
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325 err = find_symbol(J, "UseCompressedOops", &J->Use_Compressed_Oops_address); |
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326 if (err == PS_OK) { |
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327 err = ps_pread(J->P, J->Use_Compressed_Oops_address, &J->Use_Compressed_Oops, sizeof(uint8_t)); |
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328 CHECK_FAIL(err); |
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329 } else { |
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330 J->Use_Compressed_Oops = 0; |
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331 } |
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332 |
0 | 333 err = read_pointer(J, J->Universe_methodKlassObj_address, &J->Universe_methodKlassObj); |
334 CHECK_FAIL(err); | |
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335 |
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336 err = read_pointer(J, J->Universe_narrow_oop_base_address, &J->Universe_narrow_oop_base); |
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337 CHECK_FAIL(err); |
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338 err = ps_pread(J->P, J->Universe_narrow_oop_shift_address, &J->Universe_narrow_oop_shift, sizeof(uint32_t)); |
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339 CHECK_FAIL(err); |
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340 |
0 | 341 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + |
342 OFFSET_VirtualSpace_low, &J->CodeCache_low); | |
343 CHECK_FAIL(err); | |
344 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_memory + | |
345 OFFSET_VirtualSpace_high, &J->CodeCache_high); | |
346 CHECK_FAIL(err); | |
347 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap + | |
348 OFFSET_VirtualSpace_low, &J->CodeCache_segmap_low); | |
349 CHECK_FAIL(err); | |
350 err = read_pointer(J, J->CodeCache_heap_address + OFFSET_CodeHeap_segmap + | |
351 OFFSET_VirtualSpace_high, &J->CodeCache_segmap_high); | |
352 CHECK_FAIL(err); | |
353 | |
354 err = ps_pread(J->P, J->CodeCache_heap_address + OFFSET_CodeHeap_log2_segment_size, | |
355 &J->SIZE_CodeCache_log2_segment, sizeof(J->SIZE_CodeCache_log2_segment)); | |
356 CHECK_FAIL(err); | |
357 | |
358 return PS_OK; | |
359 | |
360 fail: | |
361 return err; | |
362 } | |
363 | |
364 | |
365 static int codecache_contains(jvm_agent_t* J, uint64_t ptr) { | |
366 /* make sure the code cache is up to date */ | |
367 return (J->CodeCache_low <= ptr && ptr < J->CodeCache_high); | |
368 } | |
369 | |
370 static uint64_t segment_for(jvm_agent_t* J, uint64_t p) { | |
371 return (p - J->CodeCache_low) >> J->SIZE_CodeCache_log2_segment; | |
372 } | |
373 | |
374 static uint64_t block_at(jvm_agent_t* J, int i) { | |
375 return J->CodeCache_low + (i << J->SIZE_CodeCache_log2_segment); | |
376 } | |
377 | |
378 static int find_start(jvm_agent_t* J, uint64_t ptr, uint64_t *startp) { | |
379 int err; | |
380 | |
381 *startp = 0; | |
382 if (J->CodeCache_low <= ptr && ptr < J->CodeCache_high) { | |
383 int32_t used; | |
384 uint64_t segment = segment_for(J, ptr); | |
385 uint64_t block = J->CodeCache_segmap_low; | |
386 uint8_t tag; | |
387 err = ps_pread(J->P, block + segment, &tag, sizeof(tag)); | |
388 CHECK_FAIL(err); | |
389 if (tag == 0xff) | |
390 return PS_OK; | |
391 while (tag > 0) { | |
392 err = ps_pread(J->P, block + segment, &tag, sizeof(tag)); | |
393 CHECK_FAIL(err); | |
394 segment -= tag; | |
395 } | |
396 block = block_at(J, segment); | |
397 err = ps_pread(J->P, block + OFFSET_HeapBlockHeader_used, &used, sizeof(used)); | |
398 CHECK_FAIL(err); | |
399 if (used) { | |
400 *startp = block + SIZE_HeapBlockHeader; | |
401 } | |
402 } | |
403 return PS_OK; | |
404 | |
405 fail: | |
406 return -1; | |
407 } | |
408 | |
409 static int find_jlong_constant(jvm_agent_t* J, const char *name, uint64_t* valuep) { | |
410 psaddr_t sym_addr; | |
411 int err = ps_pglobal_lookup(J->P, LIBJVM_SO, name, &sym_addr); | |
412 if (err == PS_OK) { | |
413 err = ps_pread(J->P, sym_addr, valuep, sizeof(uint64_t)); | |
414 return err; | |
415 } | |
416 *valuep = -1; | |
417 return -1; | |
418 } | |
419 | |
420 jvm_agent_t *Jagent_create(struct ps_prochandle *P, int vers) { | |
421 jvm_agent_t* J; | |
422 int err; | |
423 | |
424 if (vers != JVM_DB_VERSION) { | |
425 errno = ENOTSUP; | |
426 return NULL; | |
427 } | |
428 | |
429 J = (jvm_agent_t*)calloc(sizeof(struct jvm_agent), 1); | |
430 | |
431 debug = getenv("LIBJVMDB_DEBUG") != NULL; | |
432 if (debug) debug = 3; | |
433 | |
434 if (debug) { | |
435 fprintf(stderr, "Jagent_create: debug=%d\n", debug); | |
436 #ifdef X86_COMPILER2 | |
437 fprintf(stderr, "Jagent_create: R_SP=%d, R_FP=%d, POINTER_SIZE=%d\n", R_SP, R_FP, POINTER_SIZE); | |
438 #endif /* X86_COMPILER2 */ | |
439 } | |
440 | |
441 J->P = P; | |
442 | |
443 // Initialize the initial previous frame | |
444 | |
445 J->prev_fr.fp = 0; | |
446 J->prev_fr.pc = 0; | |
447 J->prev_fr.sp = 0; | |
448 J->prev_fr.sender_sp = 0; | |
449 | |
450 err = find_symbol(J, "__1cHnmethodG__vtbl_", &J->nmethod_vtbl); | |
451 CHECK_FAIL(err); | |
452 err = find_symbol(J, "__1cKBufferBlobG__vtbl_", &J->BufferBlob_vtbl); | |
453 if (err != PS_OK) J->BufferBlob_vtbl = 0; | |
454 err = find_symbol(J, "__1cICodeBlobG__vtbl_", &J->CodeBlob_vtbl); | |
455 CHECK_FAIL(err); | |
456 err = find_symbol(J, "__1cLRuntimeStubG__vtbl_", &J->RuntimeStub_vtbl); | |
457 CHECK_FAIL(err); | |
458 | |
459 err = parse_vmstructs(J); | |
460 CHECK_FAIL(err); | |
461 err = read_volatiles(J); | |
462 CHECK_FAIL(err); | |
463 | |
464 return J; | |
465 | |
466 fail: | |
467 Jagent_destroy(J); | |
468 return NULL; | |
469 } | |
470 | |
471 void Jagent_destroy(jvm_agent_t *J) { | |
472 if (J != NULL) { | |
473 free(J); | |
474 } | |
475 } | |
476 | |
477 static int is_methodOop(jvm_agent_t* J, uint64_t methodOopPtr) { | |
478 uint64_t klass; | |
479 int err; | |
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480 // If UseCompressedOops, this was a compressed oop. |
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481 if (J->Use_Compressed_Oops != 0) { |
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482 uint32_t cklass; |
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483 err = read_compressed_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, |
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484 &cklass); |
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485 // decode heap oop, same as oop.inline.hpp |
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486 klass = (uint64_t)((uintptr_t)J->Universe_narrow_oop_base + |
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487 ((uintptr_t)cklass << J->Universe_narrow_oop_shift)); |
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488 } else { |
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489 err = read_pointer(J, methodOopPtr + OFFSET_oopDesc_metadata, &klass); |
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490 } |
0 | 491 if (err != PS_OK) goto fail; |
492 return klass == J->Universe_methodKlassObj; | |
493 | |
494 fail: | |
495 return 0; | |
496 } | |
497 | |
498 static int | |
499 name_for_methodOop(jvm_agent_t* J, uint64_t methodOopPtr, char * result, size_t size) | |
500 { | |
501 short nameIndex; | |
502 short signatureIndex; | |
503 uint64_t constantPool; | |
504 uint64_t constMethod; | |
505 uint64_t nameSymbol; | |
506 uint64_t signatureSymbol; | |
507 uint64_t klassPtr; | |
508 uint64_t klassSymbol; | |
509 short klassSymbolLength; | |
510 short nameSymbolLength; | |
511 short signatureSymbolLength; | |
512 char * nameString = NULL; | |
513 char * klassString = NULL; | |
514 char * signatureString = NULL; | |
515 int err; | |
516 | |
517 err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constants, &constantPool); | |
518 CHECK_FAIL(err); | |
519 err = read_pointer(J, methodOopPtr + OFFSET_methodOopDesc_constMethod, &constMethod); | |
520 CHECK_FAIL(err); | |
521 | |
522 /* To get name string */ | |
523 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_name_index, &nameIndex, 2); | |
524 CHECK_FAIL(err); | |
525 err = read_pointer(J, constantPool + nameIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &nameSymbol); | |
526 CHECK_FAIL(err); | |
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527 // The symbol is a CPSlot and has lower bit set to indicate metadata |
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528 nameSymbol &= (~1); // remove metadata lsb |
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529 err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_length, &nameSymbolLength, 2); |
0 | 530 CHECK_FAIL(err); |
531 nameString = (char*)calloc(nameSymbolLength + 1, 1); | |
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532 err = ps_pread(J->P, nameSymbol + OFFSET_Symbol_body, nameString, nameSymbolLength); |
0 | 533 CHECK_FAIL(err); |
534 | |
535 /* To get signature string */ | |
536 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_signature_index, &signatureIndex, 2); | |
537 CHECK_FAIL(err); | |
538 err = read_pointer(J, constantPool + signatureIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &signatureSymbol); | |
539 CHECK_FAIL(err); | |
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540 signatureSymbol &= (~1); // remove metadata lsb |
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541 err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_length, &signatureSymbolLength, 2); |
0 | 542 CHECK_FAIL(err); |
543 signatureString = (char*)calloc(signatureSymbolLength + 1, 1); | |
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544 err = ps_pread(J->P, signatureSymbol + OFFSET_Symbol_body, signatureString, signatureSymbolLength); |
0 | 545 CHECK_FAIL(err); |
546 | |
547 /* To get klass string */ | |
548 err = read_pointer(J, constantPool + OFFSET_constantPoolOopDesc_pool_holder, &klassPtr); | |
549 CHECK_FAIL(err); | |
550 err = read_pointer(J, klassPtr + OFFSET_Klass_name + SIZE_oopDesc, &klassSymbol); | |
551 CHECK_FAIL(err); | |
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552 err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_length, &klassSymbolLength, 2); |
0 | 553 CHECK_FAIL(err); |
554 klassString = (char*)calloc(klassSymbolLength + 1, 1); | |
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555 err = ps_pread(J->P, klassSymbol + OFFSET_Symbol_body, klassString, klassSymbolLength); |
0 | 556 CHECK_FAIL(err); |
557 | |
558 result[0] = '\0'; | |
559 strncat(result, klassString, size); | |
560 size -= strlen(klassString); | |
561 strncat(result, ".", size); | |
562 size -= 1; | |
563 strncat(result, nameString, size); | |
564 size -= strlen(nameString); | |
565 strncat(result, signatureString, size); | |
566 | |
567 if (nameString != NULL) free(nameString); | |
568 if (klassString != NULL) free(klassString); | |
569 if (signatureString != NULL) free(signatureString); | |
570 | |
571 return PS_OK; | |
572 | |
573 fail: | |
574 if (debug) { | |
575 fprintf(stderr, "name_for_methodOop: FAIL \n\n"); | |
576 } | |
577 if (nameString != NULL) free(nameString); | |
578 if (klassString != NULL) free(klassString); | |
579 if (signatureString != NULL) free(signatureString); | |
580 return -1; | |
581 } | |
582 | |
583 static int nmethod_info(Nmethod_t *N) | |
584 { | |
585 jvm_agent_t *J = N->J; | |
586 uint64_t nm = N->nm; | |
587 int32_t err; | |
588 | |
589 if (debug > 2 ) | |
590 fprintf(stderr, "\t nmethod_info: BEGIN \n"); | |
591 | |
592 /* Instructions */ | |
1748 | 593 err = ps_pread(J->P, nm + OFFSET_CodeBlob_code_offset, &N->instrs_beg, SZ32); |
0 | 594 CHECK_FAIL(err); |
595 err = ps_pread(J->P, nm + OFFSET_CodeBlob_data_offset, &N->instrs_end, SZ32); | |
596 CHECK_FAIL(err); | |
597 err = ps_pread(J->P, nm + OFFSET_nmethod_deoptimize_offset, &N->deopt_beg, SZ32); | |
598 CHECK_FAIL(err); | |
599 err = ps_pread(J->P, nm + OFFSET_nmethod_orig_pc_offset, &N->orig_pc_offset, SZ32); | |
600 CHECK_FAIL(err); | |
601 | |
602 /* Oops */ | |
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603 err = ps_pread(J->P, nm + OFFSET_nmethod_oops_offset, &N->oops_beg, SZ32); |
0 | 604 CHECK_FAIL(err); |
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605 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->oops_end, SZ32); |
0 | 606 CHECK_FAIL(err); |
607 | |
608 /* scopes_pcs */ | |
609 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_pcs_offset, &N->scopes_pcs_beg, SZ32); | |
610 CHECK_FAIL(err); | |
611 err = ps_pread(J->P, nm + OFFSET_nmethod_handler_table_offset, &N->scopes_pcs_end, SZ32); | |
612 CHECK_FAIL(err); | |
613 | |
614 /* scopes_data */ | |
615 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->scopes_data_beg, SZ32); | |
616 CHECK_FAIL(err); | |
617 | |
618 if (debug > 2 ) { | |
619 N->scopes_data_end = N->scopes_pcs_beg; | |
620 | |
621 fprintf(stderr, "\t nmethod_info: instrs_beg: %#x, instrs_end: %#x\n", | |
622 N->instrs_beg, N->instrs_end); | |
623 | |
624 fprintf(stderr, "\t nmethod_info: deopt_beg: %#x \n", | |
625 N->deopt_beg); | |
626 | |
627 fprintf(stderr, "\t nmethod_info: orig_pc_offset: %#x \n", | |
628 N->orig_pc_offset); | |
629 | |
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630 fprintf(stderr, "\t nmethod_info: oops_beg: %#x, oops_end: %#x\n", |
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631 N->oops_beg, N->oops_end); |
0 | 632 |
633 fprintf(stderr, "\t nmethod_info: scopes_data_beg: %#x, scopes_data_end: %#x\n", | |
634 N->scopes_data_beg, N->scopes_data_end); | |
635 | |
636 fprintf(stderr, "\t nmethod_info: scopes_pcs_beg: %#x, scopes_pcs_end: %#x\n", | |
637 N->scopes_pcs_beg, N->scopes_pcs_end); | |
638 | |
639 fprintf(stderr, "\t nmethod_info: END \n\n"); | |
640 } | |
641 return PS_OK; | |
642 | |
643 fail: | |
644 return err; | |
645 } | |
646 | |
647 static int | |
648 raw_read_int(jvm_agent_t* J, uint64_t *buffer, int32_t *val) | |
649 { | |
650 int shift = 0; | |
651 int value = 0; | |
652 uint8_t ch = 0; | |
653 int32_t err; | |
654 int32_t sum; | |
655 // Constants for UNSIGNED5 coding of Pack200 | |
656 // see compressedStream.hpp | |
657 enum { | |
658 lg_H = 6, | |
659 H = 1<<lg_H, | |
660 BitsPerByte = 8, | |
661 L = (1<<BitsPerByte)-H, | |
662 }; | |
663 int i; | |
664 | |
665 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
666 CHECK_FAIL(err); | |
667 if (debug > 2) | |
668 fprintf(stderr, "\t\t\t raw_read_int: *buffer: %#llx, ch: %#x\n", *buffer, ch); | |
669 | |
670 sum = ch; | |
671 if ( sum >= L ) { | |
672 int32_t lg_H_i = lg_H; | |
673 // Read maximum of 5 total bytes (we've already read 1). | |
674 // See CompressedReadStream::read_int_mb | |
675 for ( i = 0; i < 4; i++) { | |
676 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
677 CHECK_FAIL(err); | |
678 sum += ch << lg_H_i; | |
679 if (ch < L ) { | |
680 *val = sum; | |
681 return PS_OK; | |
682 } | |
683 lg_H_i += lg_H; | |
684 } | |
685 } | |
686 *val = sum; | |
687 return PS_OK; | |
688 | |
689 fail: | |
690 return err; | |
691 } | |
692 | |
693 static int | |
694 read_pair(jvm_agent_t* J, uint64_t *buffer, int32_t *bci, int32_t *line) | |
695 { | |
696 uint8_t next = 0; | |
697 int32_t bci_delta; | |
698 int32_t line_delta; | |
699 int32_t err; | |
700 | |
701 if (debug > 2) | |
702 fprintf(stderr, "\t\t read_pair: BEGIN\n"); | |
703 | |
704 err = ps_pread(J->P, (*buffer)++, &next, sizeof(uint8_t)); | |
705 CHECK_FAIL(err); | |
706 | |
707 if (next == 0) { | |
708 if (debug > 2) | |
709 fprintf(stderr, "\t\t read_pair: END: next == 0\n"); | |
710 return 1; /* stream terminated */ | |
711 } | |
712 if (next == 0xFF) { | |
713 if (debug > 2) | |
714 fprintf(stderr, "\t\t read_pair: END: next == 0xFF\n"); | |
715 | |
716 /* Escape character, regular compression used */ | |
717 | |
718 err = raw_read_int(J, buffer, &bci_delta); | |
719 CHECK_FAIL(err); | |
720 | |
721 err = raw_read_int(J, buffer, &line_delta); | |
722 CHECK_FAIL(err); | |
723 | |
724 *bci += bci_delta; | |
725 *line += line_delta; | |
726 | |
727 if (debug > 2) { | |
728 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
729 line_delta, bci_delta); | |
730 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
731 *line, *bci); | |
732 } | |
733 } else { | |
734 /* Single byte compression used */ | |
735 *bci += next >> 3; | |
736 *line += next & 0x7; | |
737 if (debug > 2) { | |
738 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
739 next & 0x7, next >> 3); | |
740 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
741 *line, *bci); | |
742 } | |
743 } | |
744 if (debug > 2) | |
745 fprintf(stderr, "\t\t read_pair: END\n"); | |
746 return PS_OK; | |
747 | |
748 fail: | |
749 if (debug) | |
750 fprintf(stderr, "\t\t read_pair: FAIL\n"); | |
751 return err; | |
752 } | |
753 | |
754 static int | |
755 line_number_from_bci(jvm_agent_t* J, Vframe_t *vf) | |
756 { | |
757 uint64_t buffer; | |
758 uint16_t code_size; | |
759 uint64_t code_end_delta; | |
760 uint64_t constMethod; | |
761 int8_t access_flags; | |
762 int32_t best_bci = 0; | |
763 int32_t stream_bci = 0; | |
764 int32_t stream_line = 0; | |
765 int32_t err; | |
766 | |
767 if (debug > 2) { | |
768 char name[256]; | |
769 err = name_for_methodOop(J, vf->methodOop, name, 256); | |
770 CHECK_FAIL(err); | |
771 fprintf(stderr, "\t line_number_from_bci: BEGIN, method name: %s, targ bci: %d\n", | |
772 name, vf->bci); | |
773 } | |
774 | |
775 err = read_pointer(J, vf->methodOop + OFFSET_methodOopDesc_constMethod, &constMethod); | |
776 CHECK_FAIL(err); | |
777 | |
778 vf->line = 0; | |
779 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_flags, &access_flags, sizeof(int8_t)); | |
780 CHECK_FAIL(err); | |
781 | |
782 if (!(access_flags & constMethodOopDesc_has_linenumber_table)) { | |
783 if (debug > 2) | |
784 fprintf(stderr, "\t line_number_from_bci: END: !HAS_LINE_NUMBER_TABLE \n\n"); | |
785 return PS_OK; | |
786 } | |
787 | |
788 /* The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
789 * Not necessarily sorted and not necessarily one-to-one. | |
790 */ | |
791 | |
792 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_code_size, &code_size, SZ16); | |
793 CHECK_FAIL(err); | |
794 | |
795 /* inlined_table_start() */ | |
796 code_end_delta = (uint64_t) (access_flags & AccessFlags_NATIVE) ? 2*POINTER_SIZE : 0; | |
797 buffer = constMethod + (uint64_t) SIZE_constMethodOopDesc + (uint64_t) code_size + code_end_delta; | |
798 | |
799 if (debug > 2) { | |
800 fprintf(stderr, "\t\t line_number_from_bci: methodOop: %#llx, native: %d\n", | |
801 vf->methodOop, (access_flags & AccessFlags_NATIVE)); | |
802 fprintf(stderr, "\t\t line_number_from_bci: buffer: %#llx, code_size: %d\n", | |
803 buffer, (int) code_size); | |
804 } | |
805 | |
806 while (read_pair(J, &buffer, &stream_bci, &stream_line) == 0) { | |
807 if (stream_bci == vf->bci) { | |
808 /* perfect match */ | |
809 if (debug > 2) | |
810 fprintf(stderr, "\t line_number_from_bci: END: exact line: %ld \n\n", vf->line); | |
811 vf->line = stream_line; | |
812 return PS_OK; | |
813 } else { | |
814 /* update best_bci/line */ | |
815 if (stream_bci < vf->bci && stream_bci >= best_bci) { | |
816 best_bci = stream_bci; | |
817 vf->line = stream_line; | |
818 if (debug > 2) { | |
819 fprintf(stderr, "\t line_number_from_bci: best_bci: %ld, best_line: %ld\n", | |
820 best_bci, vf->line); | |
821 } | |
822 } | |
823 } | |
824 } | |
825 if (debug > 2) | |
826 fprintf(stderr, "\t line_number_from_bci: END: line: %ld \n\n", vf->line); | |
827 return PS_OK; | |
828 | |
829 fail: | |
830 if (debug) | |
831 fprintf(stderr, "\t line_number_from_bci: FAIL\n"); | |
832 return err; | |
833 } | |
834 | |
835 static int | |
836 get_real_pc(Nmethod_t *N, uint64_t pc_desc, uint64_t *real_pc) | |
837 { | |
838 int32_t pc_offset; | |
839 int32_t err; | |
840 | |
841 err = ps_pread(N->J->P, pc_desc + OFFSET_PcDesc_pc_offset, &pc_offset, SZ32); | |
842 CHECK_FAIL(err); | |
843 | |
844 *real_pc = N->nm + N->instrs_beg + pc_offset; | |
845 if (debug > 2) { | |
846 fprintf(stderr, "\t\t get_real_pc: pc_offset: %lx, real_pc: %llx\n", | |
847 pc_offset, *real_pc); | |
848 } | |
849 return PS_OK; | |
850 | |
851 fail: | |
852 return err; | |
853 } | |
854 | |
855 /* Finds a PcDesc with real-pc equal to N->pc */ | |
856 static int pc_desc_at(Nmethod_t *N) | |
857 { | |
858 uint64_t pc_diff; | |
859 int32_t offs; | |
860 int32_t err; | |
861 | |
862 if (debug > 2) | |
863 fprintf(stderr, "\t pc_desc_at: BEGIN\n"); | |
864 | |
865 N->vf_cnt = 0; | |
866 N->pc_desc = 0; | |
867 | |
868 for (offs = N->scopes_pcs_beg; offs < N->scopes_pcs_end; offs += SIZE_PcDesc) { | |
869 uint64_t pd; | |
870 uint64_t best_pc_diff = 16; /* some approximation */ | |
871 uint64_t real_pc = 0; | |
872 | |
873 pd = N->nm + offs; | |
874 err = get_real_pc(N, pd, &real_pc); | |
875 CHECK_FAIL(err); | |
876 | |
877 pc_diff = real_pc - N->pc; | |
878 | |
879 /* In general, this fragment should work */ | |
880 if (pc_diff == 0) { | |
881 N->pc_desc = pd; | |
882 if (debug) { | |
883 fprintf(stderr, "\t pc_desc_at: END: pc_desc: FOUND: %#lx \n\n", pd); | |
884 } | |
885 return PS_OK; | |
886 } | |
887 /* This fragment is to be able to find out an appropriate | |
888 * pc_desc entry even if pc_desc info is inaccurate. | |
889 */ | |
890 if (best_pc_diff > pc_diff && pc_diff > 0) { | |
891 best_pc_diff = pc_diff; | |
892 N->pc_desc = pd; | |
893 } | |
894 } | |
895 if (debug) { | |
896 fprintf(stderr, "\t pc_desc_at: END: pc_desc NOT FOUND"); | |
897 if (pc_diff < 20) | |
898 fprintf(stderr, ", best pc_diff: %d\n\n", pc_diff); | |
899 else | |
900 fprintf(stderr, "\n\n"); | |
901 } | |
902 return PS_OK; | |
903 | |
904 fail: | |
905 return err; | |
906 } | |
907 | |
908 static int | |
909 scope_desc_at(Nmethod_t *N, int32_t decode_offset, Vframe_t *vf) | |
910 { | |
911 uint64_t buffer; | |
912 int32_t err; | |
913 | |
914 if (debug > 2) { | |
915 fprintf(stderr, "\t\t scope_desc_at: BEGIN \n"); | |
916 } | |
917 | |
918 buffer = N->nm + N->scopes_data_beg + decode_offset; | |
919 | |
920 err = raw_read_int(N->J, &buffer, &vf->sender_decode_offset); | |
921 CHECK_FAIL(err); | |
922 | |
923 err = raw_read_int(N->J, &buffer, &vf->methodIdx); | |
924 CHECK_FAIL(err); | |
925 | |
926 err = raw_read_int(N->J, &buffer, &vf->bci); | |
927 CHECK_FAIL(err); | |
928 | |
929 if (debug > 2) { | |
930 fprintf(stderr, "\t\t scope_desc_at: sender_decode_offset: %#x\n", | |
931 vf->sender_decode_offset); | |
932 fprintf(stderr, "\t\t scope_desc_at: methodIdx: %d\n", vf->methodIdx); | |
933 fprintf(stderr, "\t\t scope_desc_at: bci: %d\n", vf->bci); | |
934 | |
935 fprintf(stderr, "\t\t scope_desc_at: END \n\n"); | |
936 } | |
937 return PS_OK; | |
938 | |
939 fail: | |
940 return err; | |
941 } | |
942 | |
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943 static int scopeDesc_chain(Nmethod_t *N) { |
0 | 944 int32_t decode_offset = 0; |
945 int32_t err; | |
946 | |
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947 if (debug > 2) { |
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948 fprintf(stderr, "\t scopeDesc_chain: BEGIN\n"); |
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949 } |
0 | 950 |
951 err = ps_pread(N->J->P, N->pc_desc + OFFSET_PcDesc_scope_decode_offset, | |
952 &decode_offset, SZ32); | |
953 CHECK_FAIL(err); | |
954 | |
955 while (decode_offset > 0) { | |
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956 Vframe_t *vf = &N->vframes[N->vf_cnt]; |
0 | 957 |
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958 if (debug > 2) { |
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959 fprintf(stderr, "\t scopeDesc_chain: decode_offset: %#x\n", decode_offset); |
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960 } |
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961 |
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962 err = scope_desc_at(N, decode_offset, vf); |
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963 CHECK_FAIL(err); |
0 | 964 |
1563
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965 if (vf->methodIdx > ((N->oops_end - N->oops_beg) / POINTER_SIZE)) { |
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966 fprintf(stderr, "\t scopeDesc_chain: (methodIdx > oops length) !\n"); |
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967 return -1; |
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968 } |
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969 err = read_pointer(N->J, N->nm + N->oops_beg + (vf->methodIdx-1)*POINTER_SIZE, |
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970 &vf->methodOop); |
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971 CHECK_FAIL(err); |
0 | 972 |
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973 if (vf->methodOop) { |
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974 N->vf_cnt++; |
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975 err = line_number_from_bci(N->J, vf); |
0 | 976 CHECK_FAIL(err); |
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977 if (debug > 2) { |
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978 fprintf(stderr, "\t scopeDesc_chain: methodOop: %#8llx, line: %ld\n", |
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979 vf->methodOop, vf->line); |
0 | 980 } |
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981 } |
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982 decode_offset = vf->sender_decode_offset; |
0 | 983 } |
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984 if (debug > 2) { |
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985 fprintf(stderr, "\t scopeDesc_chain: END \n\n"); |
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986 } |
0 | 987 return PS_OK; |
988 | |
989 fail: | |
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990 if (debug) { |
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991 fprintf(stderr, "\t scopeDesc_chain: FAIL \n\n"); |
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992 } |
0 | 993 return err; |
994 } | |
995 | |
996 | |
997 static int | |
998 name_for_nmethod(jvm_agent_t* J, | |
999 uint64_t nm, | |
1000 uint64_t pc, | |
1001 uint64_t methodOop, | |
1002 char *result, | |
1003 size_t size, | |
1004 Jframe_t *jframe | |
1005 ) { | |
1006 Nmethod_t *N; | |
1007 Vframe_t *vf; | |
1008 int32_t err; | |
1009 int deoptimized = 0; | |
1010 | |
1011 if (debug) { | |
1012 fprintf(stderr, "name_for_nmethod: BEGIN: nmethod: %#llx, pc: %#llx\n", nm, pc); | |
1013 } | |
1014 if (J->N == NULL) { | |
1015 J->N = (Nmethod_t *) malloc(sizeof(Nmethod_t)); | |
1016 } | |
1017 memset(J->N, 0, sizeof(Nmethod_t)); /* Initial stat: all values are zeros */ | |
1018 N = J->N; | |
1019 N->J = J; | |
1020 N->nm = nm; | |
1021 N->pc = pc; | |
1022 N->jframe = jframe; | |
1023 | |
1024 err = nmethod_info(N); | |
1025 CHECK_FAIL(err); | |
1026 if (debug) { | |
1027 fprintf(stderr, "name_for_nmethod: pc: %#llx, deopt_pc: %#llx\n", | |
1028 pc, N->nm + N->deopt_beg); | |
1029 } | |
1030 | |
1031 /* check for a deoptimized frame */ | |
1032 if ( pc == N->nm + N->deopt_beg) { | |
1033 uint64_t base; | |
1034 if (debug) { | |
1035 fprintf(stderr, "name_for_nmethod: found deoptimized frame\n"); | |
1036 } | |
1037 if (J->prev_fr.sender_sp != 0) { | |
1038 base = J->prev_fr.sender_sp + N->orig_pc_offset; | |
1039 } else { | |
1040 base = J->curr_fr.sp + N->orig_pc_offset; | |
1041 } | |
1042 err = read_pointer(J, base, &N->pc); | |
1043 CHECK_FAIL(err); | |
1044 if (debug) { | |
1045 fprintf(stderr, "name_for_nmethod: found deoptimized frame converting pc from %#8llx to %#8llx\n", | |
1046 pc, N->pc); | |
1047 } | |
1048 deoptimized = 1; | |
1049 } | |
1050 | |
1051 err = pc_desc_at(N); | |
1052 CHECK_FAIL(err); | |
1053 | |
1054 if (N->pc_desc > 0) { | |
1055 jframe->locinf = 1; | |
1056 err = scopeDesc_chain(N); | |
1057 CHECK_FAIL(err); | |
1058 } | |
1059 result[0] = COMP_METHOD_SIGN; | |
1060 vf = &N->vframes[0]; | |
1061 if (N->vf_cnt > 0) { | |
1062 jframe->vf_cnt = N->vf_cnt; | |
1063 jframe->bci = vf->bci; | |
1064 jframe->line = vf->line; | |
1065 err = name_for_methodOop(J, N->vframes[0].methodOop, result+1, size-1); | |
1066 CHECK_FAIL(err); | |
1067 } else { | |
1068 err = name_for_methodOop(J, methodOop, result+1, size-1); | |
1069 CHECK_FAIL(err); | |
1070 } | |
1071 if (deoptimized) { | |
1072 strncat(result + 1, " [deoptimized frame]; ", size-1); | |
1073 } else { | |
1074 strncat(result + 1, " [compiled] ", size-1); | |
1075 } | |
1076 if (debug) | |
1077 fprintf(stderr, "name_for_nmethod: END: method name: %s, vf_cnt: %d\n\n", | |
1078 result, N->vf_cnt); | |
1079 return PS_OK; | |
1080 | |
1081 fail: | |
1082 if (debug) | |
1083 fprintf(stderr, "name_for_nmethod: FAIL \n\n"); | |
1084 return err; | |
1085 } | |
1086 | |
1087 int is_bci(intptr_t bcx) { | |
1088 switch (DATA_MODEL) { | |
1089 case PR_MODEL_LP64: | |
1090 return ((uintptr_t) bcx) <= ((uintptr_t) MAX_METHOD_CODE_SIZE) ; | |
1091 case PR_MODEL_ILP32: | |
1092 default: | |
1093 return 0 <= bcx && bcx <= MAX_METHOD_CODE_SIZE; | |
1094 } | |
1095 } | |
1096 | |
1097 static int | |
1098 name_for_imethod(jvm_agent_t* J, | |
1099 uint64_t bcx, | |
1100 uint64_t methodOop, | |
1101 char *result, | |
1102 size_t size, | |
1103 Jframe_t *jframe | |
1104 ) { | |
1105 uint64_t bci; | |
1106 uint64_t constMethod; | |
1107 Vframe_t vframe = {0}; | |
1108 Vframe_t *vf = &vframe; | |
1109 int32_t err; | |
1110 | |
1111 err = read_pointer(J, methodOop + OFFSET_methodOopDesc_constMethod, &constMethod); | |
1112 CHECK_FAIL(err); | |
1113 | |
1114 bci = is_bci(bcx) ? bcx : bcx - (constMethod + (uint64_t) SIZE_constMethodOopDesc); | |
1115 | |
1116 if (debug) | |
1117 fprintf(stderr, "\t name_for_imethod: BEGIN: methodOop: %#llx\n", methodOop); | |
1118 | |
1119 err = name_for_methodOop(J, methodOop, result, size); | |
1120 CHECK_FAIL(err); | |
1121 if (debug) | |
1122 fprintf(stderr, "\t name_for_imethod: method name: %s\n", result); | |
1123 | |
1124 if (bci > 0) { | |
1125 vf->methodOop = methodOop; | |
1126 vf->bci = bci; | |
1127 err = line_number_from_bci(J, vf); | |
1128 CHECK_FAIL(err); | |
1129 } | |
1130 jframe->bci = vf->bci; | |
1131 jframe->line = vf->line; | |
1132 jframe->locinf = 1; | |
1133 | |
1134 if (debug) { | |
1135 fprintf(stderr, "\t name_for_imethod: END: bci: %d, line: %d\n\n", | |
1136 vf->bci, vf->line); | |
1137 } | |
1138 return PS_OK; | |
1139 | |
1140 fail: | |
1141 if (debug) | |
1142 fprintf(stderr, "\t name_for_imethod: FAIL\n"); | |
1143 return err; | |
1144 } | |
1145 | |
1146 static int | |
1147 name_for_codecache(jvm_agent_t* J, uint64_t fp, uint64_t pc, char * result, | |
1148 size_t size, Jframe_t *jframe, int* is_interpreted) | |
1149 { | |
1150 uint64_t start; | |
1151 uint64_t vtbl; | |
1152 int32_t err; | |
1153 *is_interpreted = 0; | |
1154 | |
1155 result[0] = '\0'; | |
1156 | |
1157 err = find_start(J, pc, &start); | |
1158 CHECK_FAIL(err); | |
1159 | |
1160 err = read_pointer(J, start, &vtbl); | |
1161 CHECK_FAIL(err); | |
1162 | |
1163 if (vtbl == J->nmethod_vtbl) { | |
1164 uint64_t methodOop; | |
1165 | |
1166 err = read_pointer(J, start + OFFSET_nmethod_method, &methodOop); | |
1167 CHECK_FAIL(err); | |
1168 | |
1169 if (debug) { | |
1170 fprintf(stderr, "name_for_codecache: start: %#8llx, pc: %#8llx, methodOop: %#8llx \n", | |
1171 start, pc, methodOop); | |
1172 } | |
1173 err = name_for_nmethod(J, start, pc, methodOop, result, size, jframe); | |
1174 CHECK_FAIL(err); | |
1175 } else if (vtbl == J->BufferBlob_vtbl) { | |
1176 const char * name; | |
1177 | |
1178 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
1179 | |
1180 /* | |
1181 * Temporary usage of string "Interpreter". | |
1182 * We need some other way to distinguish "StubRoutines" | |
1183 * and regular interpreted frames. | |
1184 */ | |
1185 if (err == PS_OK && strncmp(name, "Interpreter", 11) == 0) { | |
1186 *is_interpreted = 1; | |
1187 if (is_methodOop(J, J->methodOopPtr)) { | |
1188 return name_for_imethod(J, J->bcx, J->methodOopPtr, result, size, jframe); | |
1189 } | |
1190 } | |
1191 | |
1192 if (err == PS_OK) { | |
1193 strncpy(result, name, size); | |
1194 free((void*)name); | |
1195 } else { | |
1196 strncpy(result, "<unknown BufferBlob>", size); | |
1197 } | |
1198 /* return PS_OK; */ | |
1199 } else { | |
1200 const char * name; | |
1201 | |
1202 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
1203 if (err == PS_OK) { | |
1204 strncpy(result, name, size); | |
1205 free((void*)name); | |
1206 } else { | |
1207 strncpy(result, "<unknown CodeBlob>", size); | |
1208 WARN1("unknown CodeBlob: vtbl = 0x%x", vtbl); | |
1209 } | |
1210 } | |
1211 result[size-1] = '\0'; | |
1212 | |
1213 #ifdef X86_COMPILER2 | |
1214 if (vtbl != J->RuntimeStub_vtbl) { | |
1215 uint64_t trial_pc; | |
1216 int frame_size; | |
1217 err = ps_pread(J->P, start + OFFSET_CodeBlob_frame_size, | |
1218 &frame_size, SZ32); | |
1219 CHECK_FAIL(err); | |
1220 | |
1221 // frame_size is in words, we want bytes. | |
1222 frame_size *= POINTER_SIZE; /* word => byte conversion */ | |
1223 | |
1224 /* | |
1225 Because c2 doesn't use FP as a framepointer the value of sp/fp we receive | |
1226 in the initial entry to a set of stack frames containing server frames | |
1227 will pretty much be nonsense. We can detect that nonsense by looking to | |
1228 see if the PC we received is correct if we look at the expected storage | |
1229 location in relation to the FP (ie. POINTER_SIZE(FP) ) | |
1230 */ | |
1231 | |
1232 err = read_pointer(J, fp + POINTER_SIZE , &trial_pc); | |
1233 if ( (err != PS_OK || trial_pc != pc) && frame_size > 0 ) { | |
1234 // Either we couldn't even read at the "fp" or the pc didn't match | |
1235 // both are sure clues that the fp is bogus. We no search the stack | |
1236 // for a reasonable number of words trying to find the bogus fp | |
1237 // and the current pc in adjacent words. The we will be able to | |
1238 // deduce an approximation of the frame pointer and actually get | |
1239 // the correct stack pointer. Which we can then unwind for the | |
1240 // next frame. | |
1241 int i; | |
1242 uint64_t check; | |
1243 uint64_t base = J->curr_fr.sp; | |
1244 uint64_t prev_fp = 0; | |
1245 for ( i = 0; i < frame_size * 5 ; i++, base += POINTER_SIZE ) { | |
1246 err = read_pointer(J, base , &check); | |
1247 CHECK_FAIL(err); | |
1248 if (check == fp) { | |
1249 base += POINTER_SIZE; | |
1250 err = read_pointer(J, base , &check); | |
1251 CHECK_FAIL(err); | |
1252 if (check == pc) { | |
1253 if (debug) { | |
1254 fprintf(stderr, "name_for_codecache: found matching fp/pc combo at 0x%llx\n", base - POINTER_SIZE); | |
1255 } | |
1256 prev_fp = base - 2 * POINTER_SIZE; | |
1257 break; | |
1258 } | |
1259 } | |
1260 } | |
1261 if ( prev_fp != 0 ) { | |
1262 // real_sp is the sp we should have received for this frame | |
1263 uint64_t real_sp = prev_fp + 2 * POINTER_SIZE; | |
1264 // +POINTER_SIZE because callee owns the return address so caller's sp is +1 word | |
1265 jframe->new_sp = real_sp + frame_size + POINTER_SIZE; | |
1266 err = read_pointer(J, jframe->new_sp - POINTER_SIZE , &jframe->new_pc); | |
1267 CHECK_FAIL(err); | |
1268 err = read_pointer(J, jframe->new_sp - 2*POINTER_SIZE, &jframe->new_fp); | |
1269 CHECK_FAIL(err); | |
1270 return PS_OK; | |
1271 } | |
1272 } | |
1273 | |
1274 /* A prototype to workaround FP absence */ | |
1275 /* | |
1276 * frame_size can be 0 for StubRoutines (1) frame. | |
1277 * In this case it should work with fp as usual. | |
1278 */ | |
1279 if (frame_size > 0) { | |
1280 jframe->new_fp = J->prev_fr.fp + frame_size; | |
1281 jframe->new_sp = jframe->new_fp + 2 * POINTER_SIZE; | |
1282 } else { | |
1283 memset(&J->curr_fr, 0, sizeof(Frame_t)); | |
1284 err = read_pointer(J, fp, &jframe->new_fp); | |
1285 CHECK_FAIL(err); | |
1286 | |
1287 err = read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
1288 CHECK_FAIL(err); | |
1289 } | |
1290 if (debug) { | |
1291 fprintf(stderr, "name_for_codecache: %s, frame_size=%#lx\n", | |
1292 result, frame_size); | |
1293 fprintf(stderr, "name_for_codecache: prev_fr.fp=%#lx, fp=%#lx\n", | |
1294 J->prev_fr.fp, jframe->new_fp); | |
1295 } | |
1296 } | |
1297 #endif /* X86_COMPILER2 */ | |
1298 | |
1299 return PS_OK; | |
1300 | |
1301 fail: | |
1302 return err; | |
1303 } | |
1304 | |
1305 int Jget_vframe(jvm_agent_t* J, int vframe_no, | |
1306 char *name, size_t size, Jframe_t *jframe) | |
1307 { | |
1308 Nmethod_t *N = J->N; | |
1309 Vframe_t *vf; | |
1310 int32_t err; | |
1311 | |
1312 if (vframe_no >= N->vf_cnt) { | |
1313 (void) sprintf(name, "Wrong inlinedMethod%1d()", vframe_no); | |
1314 return -1; | |
1315 } | |
1316 vf = N->vframes + vframe_no; | |
1317 name[0] = COMP_METHOD_SIGN; | |
1318 err = name_for_methodOop(J, vf->methodOop, name + 1, size); | |
1319 CHECK_FAIL(err); | |
1320 | |
1321 jframe->bci = vf->bci; | |
1322 jframe->line = vf->line; | |
1323 if (debug) { | |
1324 fprintf(stderr, "\t Jget_vframe: method name: %s, line: %ld\n", | |
1325 name, vf->line); | |
1326 } | |
1327 return PS_OK; | |
1328 | |
1329 fail: | |
1330 if (debug) { | |
1331 fprintf(stderr, "\t Jget_vframe: FAIL\n"); | |
1332 } | |
1333 return err; | |
1334 } | |
1335 | |
1336 #define MAX_SYM_SIZE 256 | |
1337 | |
1338 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name, | |
1339 size_t size, Jframe_t *jframe) { | |
1340 uintptr_t fp; | |
1341 uintptr_t pc; | |
1342 /* arguments given to read_pointer need to be worst case sized */ | |
1343 uint64_t methodOopPtr = 0; | |
1344 uint64_t sender_sp; | |
1345 uint64_t bcx = 0; | |
1346 int is_interpreted = 0; | |
1347 int result = PS_OK; | |
1348 int err = PS_OK; | |
1349 | |
1350 if (J == NULL) { | |
1351 return -1; | |
1352 } | |
1353 | |
1354 jframe->vf_cnt = 1; | |
1355 jframe->new_fp = 0; | |
1356 jframe->new_pc = 0; | |
1357 jframe->line = 0; | |
1358 jframe->bci = 0; | |
1359 jframe->locinf = 0; | |
1360 | |
1361 read_volatiles(J); | |
1362 pc = (uintptr_t) regs[R_PC]; | |
1363 J->curr_fr.pc = pc; | |
1364 J->curr_fr.fp = regs[R_FP]; | |
1365 J->curr_fr.sp = regs[R_SP]; | |
1366 | |
1367 if (debug) | |
1368 fprintf(stderr, "Jlookup_by_regs: BEGINs: fp=%#lx, pc=%#lx\n", regs[R_FP], pc); | |
1369 | |
1370 #if defined(sparc) || defined(__sparc) | |
1371 /* The following workaround is for SPARC. CALL instruction occupates 8 bytes. | |
1372 * In the pcDesc structure return pc offset is recorded for CALL instructions. | |
1373 * regs[R_PC] contains a CALL instruction pc offset. | |
1374 */ | |
1375 pc += 8; | |
1376 bcx = (uintptr_t) regs[R_L1]; | |
1377 methodOopPtr = (uintptr_t) regs[R_L2]; | |
1378 sender_sp = regs[R_I5]; | |
1379 if (debug > 2) { | |
1380 fprintf(stderr, "\nregs[R_I1]=%lx, regs[R_I2]=%lx, regs[R_I5]=%lx, regs[R_L1]=%lx, regs[R_L2]=%lx\n", | |
1381 regs[R_I1], regs[R_I2], regs[R_I5], regs[R_L1], regs[R_L2]); | |
1382 } | |
1383 #elif defined(i386) || defined(__i386) || defined(__amd64) | |
1384 | |
1385 fp = (uintptr_t) regs[R_FP]; | |
1386 if (J->prev_fr.fp == 0) { | |
1387 #ifdef X86_COMPILER2 | |
1388 /* A workaround for top java frames */ | |
1389 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - 2 * POINTER_SIZE); | |
1390 #else | |
1391 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - POINTER_SIZE); | |
1392 #endif /* COMPILER2 */ | |
1393 } | |
1394 if (debug > 2) { | |
1395 printf("Jlookup_by_regs: J->prev_fr.fp = %#lx\n", J->prev_fr.fp); | |
1396 } | |
1397 | |
1398 if (read_pointer(J, fp + OFFSET_interpreter_frame_method, &methodOopPtr) != PS_OK) { | |
1399 methodOopPtr = 0; | |
1400 } | |
1401 if (read_pointer(J, fp + OFFSET_interpreter_frame_sender_sp, &sender_sp) != PS_OK) { | |
1402 sender_sp = 0; | |
1403 } | |
1404 if (read_pointer(J, fp + OFFSET_interpreter_frame_bcx_offset, &bcx) != PS_OK) { | |
1405 bcx = 0; | |
1406 } | |
1407 #endif /* i386 */ | |
1408 | |
1409 J->methodOopPtr = methodOopPtr; | |
1410 J->bcx = bcx; | |
1411 | |
1412 /* On x86 with C2 JVM: native frame may have wrong regs[R_FP] | |
1413 * For example: JVM_SuspendThread frame poins to the top interpreted frame. | |
1414 * If we call is_methodOop(J, methodOopPtr) before codecache_contains(J, pc) | |
1415 * then we go over and omit both: nmethod and I2CAdapter frames. | |
1416 * Note, that regs[R_PC] is always correct if frame defined correctly. | |
1417 * So it is better to call codecache_contains(J, pc) from the beginning. | |
1418 */ | |
1419 #ifndef X86_COMPILER2 | |
1420 if (is_methodOop(J, J->methodOopPtr)) { | |
1421 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe); | |
1422 /* If the methodOopPtr is a method then this is highly likely to be | |
1423 an interpreter frame */ | |
1424 if (result >= 0) { | |
1425 is_interpreted = 1; | |
1426 } | |
1427 } else | |
1428 #endif /* ! X86_COMPILER2 */ | |
1429 | |
1430 if (codecache_contains(J, pc)) { | |
1431 result = name_for_codecache(J, fp, pc, name, size, jframe, &is_interpreted); | |
1432 } | |
1433 #ifdef X86_COMPILER2 | |
1434 else if (is_methodOop(J, J->methodOopPtr)) { | |
1435 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe); | |
1436 /* If the methodOopPtr is a method then this is highly likely to be | |
1437 an interpreter frame */ | |
1438 if (result >= 0) { | |
1439 is_interpreted = 1; | |
1440 } | |
1441 } | |
1442 #endif /* X86_COMPILER2 */ | |
1443 else { | |
1444 if (debug) { | |
1445 fprintf(stderr, "Jlookup_by_regs: END with -1\n\n"); | |
1446 } | |
1447 result = -1; | |
1448 } | |
1449 if (!is_interpreted) { | |
1450 sender_sp = 0; | |
1451 } | |
1452 J->curr_fr.sender_sp = sender_sp; | |
1453 | |
1454 #ifdef X86_COMPILER2 | |
1455 if (!J->curr_fr.fp) { | |
1456 J->curr_fr.fp = (jframe->new_fp) ? jframe->new_fp : (uintptr_t)regs[R_FP]; | |
1457 } | |
1458 if (!jframe->new_pc && jframe->new_fp) { | |
1459 // This seems dubious | |
1460 read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
1461 CHECK_FAIL(err); | |
1462 if (debug > 2) { | |
1463 printf("Jlookup_by_regs: (update pc) jframe->new_fp: %#llx, jframe->new_pc: %#llx\n", | |
1464 jframe->new_fp, jframe->new_pc); | |
1465 } | |
1466 } | |
1467 | |
1468 #endif /* X86_COMPILER2 */ | |
1469 J->prev_fr = J->curr_fr; | |
1470 | |
1471 if (debug) | |
1472 fprintf(stderr, "Jlookup_by_regs: END\n\n"); | |
1473 | |
1474 return result; | |
1475 | |
1476 fail: | |
1477 return err; | |
1478 } | |
1479 | |
1480 void update_gregs(prgregset_t gregs, Jframe_t jframe) { | |
1481 #ifdef X86_COMPILER2 | |
1482 if (debug > 0) { | |
1483 fprintf(stderr, "update_gregs: before update sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
1484 } | |
1485 /* | |
1486 * A workaround for java C2 frames with unconventional FP. | |
1487 * may have to modify regset with new values for FP/PC/SP when needed. | |
1488 */ | |
1489 if (jframe.new_sp) { | |
1490 *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) jframe.new_sp; | |
1491 } else { | |
1492 // *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) gregs[R_FP] + 2 * POINTER_SIZE; | |
1493 } | |
1494 | |
1495 if (jframe.new_fp) { | |
1496 *((uintptr_t *) &gregs[R_FP]) = (uintptr_t) jframe.new_fp; | |
1497 } | |
1498 if (jframe.new_pc) { | |
1499 *((uintptr_t *) &gregs[R_PC]) = (uintptr_t) jframe.new_pc; | |
1500 } | |
1501 if (debug > 0) { | |
1502 fprintf(stderr, "update_gregs: after update sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
1503 } | |
1504 #endif /* X86_COMPILER2 */ | |
1505 } | |
1506 | |
1507 /* | |
1508 * Iterates over java frames at current location given by 'gregs'. | |
1509 * | |
1510 * Returns -1 if no java frames are present or if an error is encountered. | |
1511 * Returns the result of calling 'func' if the return value is non-zero. | |
1512 * Returns 0 otherwise. | |
1513 */ | |
1514 int Jframe_iter(jvm_agent_t *J, prgregset_t gregs, java_stack_f *func, void* cld) { | |
1515 char buf[MAX_SYM_SIZE + 1]; | |
1516 Jframe_t jframe; | |
1517 int i = 0, res; | |
1518 #ifdef X86_COMPILER2 | |
1519 if (debug > 0) { | |
1520 fprintf(stderr, "Jframe_iter: Entry sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
1521 } | |
1522 #endif /* X86_COMPILER2 */ | |
1523 | |
1524 memset(&jframe, 0, sizeof(Jframe_t)); | |
1525 memset(buf, 0, sizeof(buf)); | |
1526 res = Jlookup_by_regs(J, gregs, buf, sizeof(buf), &jframe); | |
1527 if (res != PS_OK) | |
1528 return (-1); | |
1529 | |
1530 | |
1531 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
1532 jframe.line, NULL); | |
1533 if (res != 0) { | |
1534 update_gregs(gregs, jframe); | |
1535 return (res); | |
1536 } | |
1537 for (i = 1; i < jframe.vf_cnt; i++) { | |
1538 Jget_vframe(J, i, buf, sizeof(buf), &jframe); | |
1539 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
1540 jframe.line, NULL); | |
1541 if (res != 0) { | |
1542 update_gregs(gregs, jframe); | |
1543 return (res); | |
1544 } | |
1545 } | |
1546 update_gregs(gregs, jframe); | |
1547 return (0); | |
1548 } |