Mercurial > hg > truffle
annotate src/os/solaris/dtrace/libjvm_db.c @ 1435:20a3896518ac
Initial adjustments to make C1X4HotSpot compile and run with latest Maxine version.
author | Thomas Wuerthinger <wuerthinger@ssw.jku.at> |
---|---|
date | Fri, 22 Oct 2010 17:31:38 +0200 |
parents | 167c2986d91b |
children | c18cbe5936b8 1a5913bf5e19 |
rev | line source |
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0 | 1 /* |
844 | 2 * Copyright 2003-2009 Sun Microsystems, Inc. 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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
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 */ | |
127 int32_t instrs_beg; /* _instructions_offset */ | |
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 */ | |
133 int32_t oops_len; /* _oops_length */ | |
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; | |
642
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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); | |
527 err = ps_pread(J->P, nameSymbol + OFFSET_symbolOopDesc_length, &nameSymbolLength, 2); | |
528 CHECK_FAIL(err); | |
529 nameString = (char*)calloc(nameSymbolLength + 1, 1); | |
530 err = ps_pread(J->P, nameSymbol + OFFSET_symbolOopDesc_body, nameString, nameSymbolLength); | |
531 CHECK_FAIL(err); | |
532 | |
533 /* To get signature string */ | |
534 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_signature_index, &signatureIndex, 2); | |
535 CHECK_FAIL(err); | |
536 err = read_pointer(J, constantPool + signatureIndex * POINTER_SIZE + SIZE_constantPoolOopDesc, &signatureSymbol); | |
537 CHECK_FAIL(err); | |
538 err = ps_pread(J->P, signatureSymbol + OFFSET_symbolOopDesc_length, &signatureSymbolLength, 2); | |
539 CHECK_FAIL(err); | |
540 signatureString = (char*)calloc(signatureSymbolLength + 1, 1); | |
541 err = ps_pread(J->P, signatureSymbol + OFFSET_symbolOopDesc_body, signatureString, signatureSymbolLength); | |
542 CHECK_FAIL(err); | |
543 | |
544 /* To get klass string */ | |
545 err = read_pointer(J, constantPool + OFFSET_constantPoolOopDesc_pool_holder, &klassPtr); | |
546 CHECK_FAIL(err); | |
547 err = read_pointer(J, klassPtr + OFFSET_Klass_name + SIZE_oopDesc, &klassSymbol); | |
548 CHECK_FAIL(err); | |
549 err = ps_pread(J->P, klassSymbol + OFFSET_symbolOopDesc_length, &klassSymbolLength, 2); | |
550 CHECK_FAIL(err); | |
551 klassString = (char*)calloc(klassSymbolLength + 1, 1); | |
552 err = ps_pread(J->P, klassSymbol + OFFSET_symbolOopDesc_body, klassString, klassSymbolLength); | |
553 CHECK_FAIL(err); | |
554 | |
555 result[0] = '\0'; | |
556 strncat(result, klassString, size); | |
557 size -= strlen(klassString); | |
558 strncat(result, ".", size); | |
559 size -= 1; | |
560 strncat(result, nameString, size); | |
561 size -= strlen(nameString); | |
562 strncat(result, signatureString, size); | |
563 | |
564 if (nameString != NULL) free(nameString); | |
565 if (klassString != NULL) free(klassString); | |
566 if (signatureString != NULL) free(signatureString); | |
567 | |
568 return PS_OK; | |
569 | |
570 fail: | |
571 if (debug) { | |
572 fprintf(stderr, "name_for_methodOop: FAIL \n\n"); | |
573 } | |
574 if (nameString != NULL) free(nameString); | |
575 if (klassString != NULL) free(klassString); | |
576 if (signatureString != NULL) free(signatureString); | |
577 return -1; | |
578 } | |
579 | |
580 static int nmethod_info(Nmethod_t *N) | |
581 { | |
582 jvm_agent_t *J = N->J; | |
583 uint64_t nm = N->nm; | |
584 int32_t err; | |
585 | |
586 if (debug > 2 ) | |
587 fprintf(stderr, "\t nmethod_info: BEGIN \n"); | |
588 | |
589 /* Instructions */ | |
590 err = ps_pread(J->P, nm + OFFSET_CodeBlob_instructions_offset, &N->instrs_beg, SZ32); | |
591 CHECK_FAIL(err); | |
592 err = ps_pread(J->P, nm + OFFSET_CodeBlob_data_offset, &N->instrs_end, SZ32); | |
593 CHECK_FAIL(err); | |
594 err = ps_pread(J->P, nm + OFFSET_nmethod_deoptimize_offset, &N->deopt_beg, SZ32); | |
595 CHECK_FAIL(err); | |
596 err = ps_pread(J->P, nm + OFFSET_nmethod_orig_pc_offset, &N->orig_pc_offset, SZ32); | |
597 CHECK_FAIL(err); | |
598 | |
599 /* Oops */ | |
600 err = ps_pread(J->P, nm + OFFSET_CodeBlob_oops_offset, &N->oops_beg, SZ32); | |
601 CHECK_FAIL(err); | |
602 err = ps_pread(J->P, nm + OFFSET_CodeBlob_oops_length, &N->oops_len, SZ32); | |
603 CHECK_FAIL(err); | |
604 | |
605 /* scopes_pcs */ | |
606 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_pcs_offset, &N->scopes_pcs_beg, SZ32); | |
607 CHECK_FAIL(err); | |
608 err = ps_pread(J->P, nm + OFFSET_nmethod_handler_table_offset, &N->scopes_pcs_end, SZ32); | |
609 CHECK_FAIL(err); | |
610 | |
611 /* scopes_data */ | |
612 err = ps_pread(J->P, nm + OFFSET_nmethod_scopes_data_offset, &N->scopes_data_beg, SZ32); | |
613 CHECK_FAIL(err); | |
614 | |
615 if (debug > 2 ) { | |
616 N->scopes_data_end = N->scopes_pcs_beg; | |
617 | |
618 fprintf(stderr, "\t nmethod_info: instrs_beg: %#x, instrs_end: %#x\n", | |
619 N->instrs_beg, N->instrs_end); | |
620 | |
621 fprintf(stderr, "\t nmethod_info: deopt_beg: %#x \n", | |
622 N->deopt_beg); | |
623 | |
624 fprintf(stderr, "\t nmethod_info: orig_pc_offset: %#x \n", | |
625 N->orig_pc_offset); | |
626 | |
627 fprintf(stderr, "\t nmethod_info: oops_beg: %#x, oops_len: %#x\n", | |
628 N->oops_beg, N->oops_len); | |
629 | |
630 fprintf(stderr, "\t nmethod_info: scopes_data_beg: %#x, scopes_data_end: %#x\n", | |
631 N->scopes_data_beg, N->scopes_data_end); | |
632 | |
633 fprintf(stderr, "\t nmethod_info: scopes_pcs_beg: %#x, scopes_pcs_end: %#x\n", | |
634 N->scopes_pcs_beg, N->scopes_pcs_end); | |
635 | |
636 fprintf(stderr, "\t nmethod_info: END \n\n"); | |
637 } | |
638 return PS_OK; | |
639 | |
640 fail: | |
641 return err; | |
642 } | |
643 | |
644 static int | |
645 raw_read_int(jvm_agent_t* J, uint64_t *buffer, int32_t *val) | |
646 { | |
647 int shift = 0; | |
648 int value = 0; | |
649 uint8_t ch = 0; | |
650 int32_t err; | |
651 int32_t sum; | |
652 // Constants for UNSIGNED5 coding of Pack200 | |
653 // see compressedStream.hpp | |
654 enum { | |
655 lg_H = 6, | |
656 H = 1<<lg_H, | |
657 BitsPerByte = 8, | |
658 L = (1<<BitsPerByte)-H, | |
659 }; | |
660 int i; | |
661 | |
662 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
663 CHECK_FAIL(err); | |
664 if (debug > 2) | |
665 fprintf(stderr, "\t\t\t raw_read_int: *buffer: %#llx, ch: %#x\n", *buffer, ch); | |
666 | |
667 sum = ch; | |
668 if ( sum >= L ) { | |
669 int32_t lg_H_i = lg_H; | |
670 // Read maximum of 5 total bytes (we've already read 1). | |
671 // See CompressedReadStream::read_int_mb | |
672 for ( i = 0; i < 4; i++) { | |
673 err = ps_pread(J->P, (*buffer)++, &ch, sizeof(uint8_t)); | |
674 CHECK_FAIL(err); | |
675 sum += ch << lg_H_i; | |
676 if (ch < L ) { | |
677 *val = sum; | |
678 return PS_OK; | |
679 } | |
680 lg_H_i += lg_H; | |
681 } | |
682 } | |
683 *val = sum; | |
684 return PS_OK; | |
685 | |
686 fail: | |
687 return err; | |
688 } | |
689 | |
690 static int | |
691 read_pair(jvm_agent_t* J, uint64_t *buffer, int32_t *bci, int32_t *line) | |
692 { | |
693 uint8_t next = 0; | |
694 int32_t bci_delta; | |
695 int32_t line_delta; | |
696 int32_t err; | |
697 | |
698 if (debug > 2) | |
699 fprintf(stderr, "\t\t read_pair: BEGIN\n"); | |
700 | |
701 err = ps_pread(J->P, (*buffer)++, &next, sizeof(uint8_t)); | |
702 CHECK_FAIL(err); | |
703 | |
704 if (next == 0) { | |
705 if (debug > 2) | |
706 fprintf(stderr, "\t\t read_pair: END: next == 0\n"); | |
707 return 1; /* stream terminated */ | |
708 } | |
709 if (next == 0xFF) { | |
710 if (debug > 2) | |
711 fprintf(stderr, "\t\t read_pair: END: next == 0xFF\n"); | |
712 | |
713 /* Escape character, regular compression used */ | |
714 | |
715 err = raw_read_int(J, buffer, &bci_delta); | |
716 CHECK_FAIL(err); | |
717 | |
718 err = raw_read_int(J, buffer, &line_delta); | |
719 CHECK_FAIL(err); | |
720 | |
721 *bci += bci_delta; | |
722 *line += line_delta; | |
723 | |
724 if (debug > 2) { | |
725 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
726 line_delta, bci_delta); | |
727 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
728 *line, *bci); | |
729 } | |
730 } else { | |
731 /* Single byte compression used */ | |
732 *bci += next >> 3; | |
733 *line += next & 0x7; | |
734 if (debug > 2) { | |
735 fprintf(stderr, "\t\t read_pair: delta = (line %d: %d)\n", | |
736 next & 0x7, next >> 3); | |
737 fprintf(stderr, "\t\t read_pair: unpack= (line %d: %d)\n", | |
738 *line, *bci); | |
739 } | |
740 } | |
741 if (debug > 2) | |
742 fprintf(stderr, "\t\t read_pair: END\n"); | |
743 return PS_OK; | |
744 | |
745 fail: | |
746 if (debug) | |
747 fprintf(stderr, "\t\t read_pair: FAIL\n"); | |
748 return err; | |
749 } | |
750 | |
751 static int | |
752 line_number_from_bci(jvm_agent_t* J, Vframe_t *vf) | |
753 { | |
754 uint64_t buffer; | |
755 uint16_t code_size; | |
756 uint64_t code_end_delta; | |
757 uint64_t constMethod; | |
758 int8_t access_flags; | |
759 int32_t best_bci = 0; | |
760 int32_t stream_bci = 0; | |
761 int32_t stream_line = 0; | |
762 int32_t err; | |
763 | |
764 if (debug > 2) { | |
765 char name[256]; | |
766 err = name_for_methodOop(J, vf->methodOop, name, 256); | |
767 CHECK_FAIL(err); | |
768 fprintf(stderr, "\t line_number_from_bci: BEGIN, method name: %s, targ bci: %d\n", | |
769 name, vf->bci); | |
770 } | |
771 | |
772 err = read_pointer(J, vf->methodOop + OFFSET_methodOopDesc_constMethod, &constMethod); | |
773 CHECK_FAIL(err); | |
774 | |
775 vf->line = 0; | |
776 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_flags, &access_flags, sizeof(int8_t)); | |
777 CHECK_FAIL(err); | |
778 | |
779 if (!(access_flags & constMethodOopDesc_has_linenumber_table)) { | |
780 if (debug > 2) | |
781 fprintf(stderr, "\t line_number_from_bci: END: !HAS_LINE_NUMBER_TABLE \n\n"); | |
782 return PS_OK; | |
783 } | |
784 | |
785 /* The line numbers are a short array of 2-tuples [start_pc, line_number]. | |
786 * Not necessarily sorted and not necessarily one-to-one. | |
787 */ | |
788 | |
789 err = ps_pread(J->P, constMethod + OFFSET_constMethodOopDesc_code_size, &code_size, SZ16); | |
790 CHECK_FAIL(err); | |
791 | |
792 /* inlined_table_start() */ | |
793 code_end_delta = (uint64_t) (access_flags & AccessFlags_NATIVE) ? 2*POINTER_SIZE : 0; | |
794 buffer = constMethod + (uint64_t) SIZE_constMethodOopDesc + (uint64_t) code_size + code_end_delta; | |
795 | |
796 if (debug > 2) { | |
797 fprintf(stderr, "\t\t line_number_from_bci: methodOop: %#llx, native: %d\n", | |
798 vf->methodOop, (access_flags & AccessFlags_NATIVE)); | |
799 fprintf(stderr, "\t\t line_number_from_bci: buffer: %#llx, code_size: %d\n", | |
800 buffer, (int) code_size); | |
801 } | |
802 | |
803 while (read_pair(J, &buffer, &stream_bci, &stream_line) == 0) { | |
804 if (stream_bci == vf->bci) { | |
805 /* perfect match */ | |
806 if (debug > 2) | |
807 fprintf(stderr, "\t line_number_from_bci: END: exact line: %ld \n\n", vf->line); | |
808 vf->line = stream_line; | |
809 return PS_OK; | |
810 } else { | |
811 /* update best_bci/line */ | |
812 if (stream_bci < vf->bci && stream_bci >= best_bci) { | |
813 best_bci = stream_bci; | |
814 vf->line = stream_line; | |
815 if (debug > 2) { | |
816 fprintf(stderr, "\t line_number_from_bci: best_bci: %ld, best_line: %ld\n", | |
817 best_bci, vf->line); | |
818 } | |
819 } | |
820 } | |
821 } | |
822 if (debug > 2) | |
823 fprintf(stderr, "\t line_number_from_bci: END: line: %ld \n\n", vf->line); | |
824 return PS_OK; | |
825 | |
826 fail: | |
827 if (debug) | |
828 fprintf(stderr, "\t line_number_from_bci: FAIL\n"); | |
829 return err; | |
830 } | |
831 | |
832 static int | |
833 get_real_pc(Nmethod_t *N, uint64_t pc_desc, uint64_t *real_pc) | |
834 { | |
835 int32_t pc_offset; | |
836 int32_t err; | |
837 | |
838 err = ps_pread(N->J->P, pc_desc + OFFSET_PcDesc_pc_offset, &pc_offset, SZ32); | |
839 CHECK_FAIL(err); | |
840 | |
841 *real_pc = N->nm + N->instrs_beg + pc_offset; | |
842 if (debug > 2) { | |
843 fprintf(stderr, "\t\t get_real_pc: pc_offset: %lx, real_pc: %llx\n", | |
844 pc_offset, *real_pc); | |
845 } | |
846 return PS_OK; | |
847 | |
848 fail: | |
849 return err; | |
850 } | |
851 | |
852 /* Finds a PcDesc with real-pc equal to N->pc */ | |
853 static int pc_desc_at(Nmethod_t *N) | |
854 { | |
855 uint64_t pc_diff; | |
856 int32_t offs; | |
857 int32_t err; | |
858 | |
859 if (debug > 2) | |
860 fprintf(stderr, "\t pc_desc_at: BEGIN\n"); | |
861 | |
862 N->vf_cnt = 0; | |
863 N->pc_desc = 0; | |
864 | |
865 for (offs = N->scopes_pcs_beg; offs < N->scopes_pcs_end; offs += SIZE_PcDesc) { | |
866 uint64_t pd; | |
867 uint64_t best_pc_diff = 16; /* some approximation */ | |
868 uint64_t real_pc = 0; | |
869 | |
870 pd = N->nm + offs; | |
871 err = get_real_pc(N, pd, &real_pc); | |
872 CHECK_FAIL(err); | |
873 | |
874 pc_diff = real_pc - N->pc; | |
875 | |
876 /* In general, this fragment should work */ | |
877 if (pc_diff == 0) { | |
878 N->pc_desc = pd; | |
879 if (debug) { | |
880 fprintf(stderr, "\t pc_desc_at: END: pc_desc: FOUND: %#lx \n\n", pd); | |
881 } | |
882 return PS_OK; | |
883 } | |
884 /* This fragment is to be able to find out an appropriate | |
885 * pc_desc entry even if pc_desc info is inaccurate. | |
886 */ | |
887 if (best_pc_diff > pc_diff && pc_diff > 0) { | |
888 best_pc_diff = pc_diff; | |
889 N->pc_desc = pd; | |
890 } | |
891 } | |
892 if (debug) { | |
893 fprintf(stderr, "\t pc_desc_at: END: pc_desc NOT FOUND"); | |
894 if (pc_diff < 20) | |
895 fprintf(stderr, ", best pc_diff: %d\n\n", pc_diff); | |
896 else | |
897 fprintf(stderr, "\n\n"); | |
898 } | |
899 return PS_OK; | |
900 | |
901 fail: | |
902 return err; | |
903 } | |
904 | |
905 static int | |
906 scope_desc_at(Nmethod_t *N, int32_t decode_offset, Vframe_t *vf) | |
907 { | |
908 uint64_t buffer; | |
909 int32_t err; | |
910 | |
911 if (debug > 2) { | |
912 fprintf(stderr, "\t\t scope_desc_at: BEGIN \n"); | |
913 } | |
914 | |
915 buffer = N->nm + N->scopes_data_beg + decode_offset; | |
916 | |
917 err = raw_read_int(N->J, &buffer, &vf->sender_decode_offset); | |
918 CHECK_FAIL(err); | |
919 | |
920 err = raw_read_int(N->J, &buffer, &vf->methodIdx); | |
921 CHECK_FAIL(err); | |
922 | |
923 err = raw_read_int(N->J, &buffer, &vf->bci); | |
924 CHECK_FAIL(err); | |
925 | |
926 if (debug > 2) { | |
927 fprintf(stderr, "\t\t scope_desc_at: sender_decode_offset: %#x\n", | |
928 vf->sender_decode_offset); | |
929 fprintf(stderr, "\t\t scope_desc_at: methodIdx: %d\n", vf->methodIdx); | |
930 fprintf(stderr, "\t\t scope_desc_at: bci: %d\n", vf->bci); | |
931 | |
932 fprintf(stderr, "\t\t scope_desc_at: END \n\n"); | |
933 } | |
934 return PS_OK; | |
935 | |
936 fail: | |
937 return err; | |
938 } | |
939 | |
1123
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940 static int scopeDesc_chain(Nmethod_t *N) { |
0 | 941 int32_t decode_offset = 0; |
942 int32_t err; | |
943 | |
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944 if (debug > 2) { |
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945 fprintf(stderr, "\t scopeDesc_chain: BEGIN\n"); |
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946 } |
0 | 947 |
948 err = ps_pread(N->J->P, N->pc_desc + OFFSET_PcDesc_scope_decode_offset, | |
949 &decode_offset, SZ32); | |
950 CHECK_FAIL(err); | |
951 | |
952 while (decode_offset > 0) { | |
1123
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953 Vframe_t *vf = &N->vframes[N->vf_cnt]; |
0 | 954 |
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955 if (debug > 2) { |
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956 fprintf(stderr, "\t scopeDesc_chain: decode_offset: %#x\n", decode_offset); |
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957 } |
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958 |
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959 err = scope_desc_at(N, decode_offset, vf); |
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960 CHECK_FAIL(err); |
0 | 961 |
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962 if (vf->methodIdx > N->oops_len) { |
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963 fprintf(stderr, "\t scopeDesc_chain: (methodIdx > oops_len) !\n"); |
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964 return -1; |
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965 } |
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966 err = read_pointer(N->J, N->nm + N->oops_beg + (vf->methodIdx-1)*POINTER_SIZE, |
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967 &vf->methodOop); |
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968 CHECK_FAIL(err); |
0 | 969 |
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970 if (vf->methodOop) { |
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971 N->vf_cnt++; |
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972 err = line_number_from_bci(N->J, vf); |
0 | 973 CHECK_FAIL(err); |
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974 if (debug > 2) { |
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975 fprintf(stderr, "\t scopeDesc_chain: methodOop: %#8llx, line: %ld\n", |
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976 vf->methodOop, vf->line); |
0 | 977 } |
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978 } |
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979 decode_offset = vf->sender_decode_offset; |
0 | 980 } |
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981 if (debug > 2) { |
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982 fprintf(stderr, "\t scopeDesc_chain: END \n\n"); |
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983 } |
0 | 984 return PS_OK; |
985 | |
986 fail: | |
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987 if (debug) { |
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988 fprintf(stderr, "\t scopeDesc_chain: FAIL \n\n"); |
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989 } |
0 | 990 return err; |
991 } | |
992 | |
993 | |
994 static int | |
995 name_for_nmethod(jvm_agent_t* J, | |
996 uint64_t nm, | |
997 uint64_t pc, | |
998 uint64_t methodOop, | |
999 char *result, | |
1000 size_t size, | |
1001 Jframe_t *jframe | |
1002 ) { | |
1003 Nmethod_t *N; | |
1004 Vframe_t *vf; | |
1005 int32_t err; | |
1006 int deoptimized = 0; | |
1007 | |
1008 if (debug) { | |
1009 fprintf(stderr, "name_for_nmethod: BEGIN: nmethod: %#llx, pc: %#llx\n", nm, pc); | |
1010 } | |
1011 if (J->N == NULL) { | |
1012 J->N = (Nmethod_t *) malloc(sizeof(Nmethod_t)); | |
1013 } | |
1014 memset(J->N, 0, sizeof(Nmethod_t)); /* Initial stat: all values are zeros */ | |
1015 N = J->N; | |
1016 N->J = J; | |
1017 N->nm = nm; | |
1018 N->pc = pc; | |
1019 N->jframe = jframe; | |
1020 | |
1021 err = nmethod_info(N); | |
1022 CHECK_FAIL(err); | |
1023 if (debug) { | |
1024 fprintf(stderr, "name_for_nmethod: pc: %#llx, deopt_pc: %#llx\n", | |
1025 pc, N->nm + N->deopt_beg); | |
1026 } | |
1027 | |
1028 /* check for a deoptimized frame */ | |
1029 if ( pc == N->nm + N->deopt_beg) { | |
1030 uint64_t base; | |
1031 if (debug) { | |
1032 fprintf(stderr, "name_for_nmethod: found deoptimized frame\n"); | |
1033 } | |
1034 if (J->prev_fr.sender_sp != 0) { | |
1035 base = J->prev_fr.sender_sp + N->orig_pc_offset; | |
1036 } else { | |
1037 base = J->curr_fr.sp + N->orig_pc_offset; | |
1038 } | |
1039 err = read_pointer(J, base, &N->pc); | |
1040 CHECK_FAIL(err); | |
1041 if (debug) { | |
1042 fprintf(stderr, "name_for_nmethod: found deoptimized frame converting pc from %#8llx to %#8llx\n", | |
1043 pc, N->pc); | |
1044 } | |
1045 deoptimized = 1; | |
1046 } | |
1047 | |
1048 err = pc_desc_at(N); | |
1049 CHECK_FAIL(err); | |
1050 | |
1051 if (N->pc_desc > 0) { | |
1052 jframe->locinf = 1; | |
1053 err = scopeDesc_chain(N); | |
1054 CHECK_FAIL(err); | |
1055 } | |
1056 result[0] = COMP_METHOD_SIGN; | |
1057 vf = &N->vframes[0]; | |
1058 if (N->vf_cnt > 0) { | |
1059 jframe->vf_cnt = N->vf_cnt; | |
1060 jframe->bci = vf->bci; | |
1061 jframe->line = vf->line; | |
1062 err = name_for_methodOop(J, N->vframes[0].methodOop, result+1, size-1); | |
1063 CHECK_FAIL(err); | |
1064 } else { | |
1065 err = name_for_methodOop(J, methodOop, result+1, size-1); | |
1066 CHECK_FAIL(err); | |
1067 } | |
1068 if (deoptimized) { | |
1069 strncat(result + 1, " [deoptimized frame]; ", size-1); | |
1070 } else { | |
1071 strncat(result + 1, " [compiled] ", size-1); | |
1072 } | |
1073 if (debug) | |
1074 fprintf(stderr, "name_for_nmethod: END: method name: %s, vf_cnt: %d\n\n", | |
1075 result, N->vf_cnt); | |
1076 return PS_OK; | |
1077 | |
1078 fail: | |
1079 if (debug) | |
1080 fprintf(stderr, "name_for_nmethod: FAIL \n\n"); | |
1081 return err; | |
1082 } | |
1083 | |
1084 int is_bci(intptr_t bcx) { | |
1085 switch (DATA_MODEL) { | |
1086 case PR_MODEL_LP64: | |
1087 return ((uintptr_t) bcx) <= ((uintptr_t) MAX_METHOD_CODE_SIZE) ; | |
1088 case PR_MODEL_ILP32: | |
1089 default: | |
1090 return 0 <= bcx && bcx <= MAX_METHOD_CODE_SIZE; | |
1091 } | |
1092 } | |
1093 | |
1094 static int | |
1095 name_for_imethod(jvm_agent_t* J, | |
1096 uint64_t bcx, | |
1097 uint64_t methodOop, | |
1098 char *result, | |
1099 size_t size, | |
1100 Jframe_t *jframe | |
1101 ) { | |
1102 uint64_t bci; | |
1103 uint64_t constMethod; | |
1104 Vframe_t vframe = {0}; | |
1105 Vframe_t *vf = &vframe; | |
1106 int32_t err; | |
1107 | |
1108 err = read_pointer(J, methodOop + OFFSET_methodOopDesc_constMethod, &constMethod); | |
1109 CHECK_FAIL(err); | |
1110 | |
1111 bci = is_bci(bcx) ? bcx : bcx - (constMethod + (uint64_t) SIZE_constMethodOopDesc); | |
1112 | |
1113 if (debug) | |
1114 fprintf(stderr, "\t name_for_imethod: BEGIN: methodOop: %#llx\n", methodOop); | |
1115 | |
1116 err = name_for_methodOop(J, methodOop, result, size); | |
1117 CHECK_FAIL(err); | |
1118 if (debug) | |
1119 fprintf(stderr, "\t name_for_imethod: method name: %s\n", result); | |
1120 | |
1121 if (bci > 0) { | |
1122 vf->methodOop = methodOop; | |
1123 vf->bci = bci; | |
1124 err = line_number_from_bci(J, vf); | |
1125 CHECK_FAIL(err); | |
1126 } | |
1127 jframe->bci = vf->bci; | |
1128 jframe->line = vf->line; | |
1129 jframe->locinf = 1; | |
1130 | |
1131 if (debug) { | |
1132 fprintf(stderr, "\t name_for_imethod: END: bci: %d, line: %d\n\n", | |
1133 vf->bci, vf->line); | |
1134 } | |
1135 return PS_OK; | |
1136 | |
1137 fail: | |
1138 if (debug) | |
1139 fprintf(stderr, "\t name_for_imethod: FAIL\n"); | |
1140 return err; | |
1141 } | |
1142 | |
1143 static int | |
1144 name_for_codecache(jvm_agent_t* J, uint64_t fp, uint64_t pc, char * result, | |
1145 size_t size, Jframe_t *jframe, int* is_interpreted) | |
1146 { | |
1147 uint64_t start; | |
1148 uint64_t vtbl; | |
1149 int32_t err; | |
1150 *is_interpreted = 0; | |
1151 | |
1152 result[0] = '\0'; | |
1153 | |
1154 err = find_start(J, pc, &start); | |
1155 CHECK_FAIL(err); | |
1156 | |
1157 err = read_pointer(J, start, &vtbl); | |
1158 CHECK_FAIL(err); | |
1159 | |
1160 if (vtbl == J->nmethod_vtbl) { | |
1161 uint64_t methodOop; | |
1162 | |
1163 err = read_pointer(J, start + OFFSET_nmethod_method, &methodOop); | |
1164 CHECK_FAIL(err); | |
1165 | |
1166 if (debug) { | |
1167 fprintf(stderr, "name_for_codecache: start: %#8llx, pc: %#8llx, methodOop: %#8llx \n", | |
1168 start, pc, methodOop); | |
1169 } | |
1170 err = name_for_nmethod(J, start, pc, methodOop, result, size, jframe); | |
1171 CHECK_FAIL(err); | |
1172 } else if (vtbl == J->BufferBlob_vtbl) { | |
1173 const char * name; | |
1174 | |
1175 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
1176 | |
1177 /* | |
1178 * Temporary usage of string "Interpreter". | |
1179 * We need some other way to distinguish "StubRoutines" | |
1180 * and regular interpreted frames. | |
1181 */ | |
1182 if (err == PS_OK && strncmp(name, "Interpreter", 11) == 0) { | |
1183 *is_interpreted = 1; | |
1184 if (is_methodOop(J, J->methodOopPtr)) { | |
1185 return name_for_imethod(J, J->bcx, J->methodOopPtr, result, size, jframe); | |
1186 } | |
1187 } | |
1188 | |
1189 if (err == PS_OK) { | |
1190 strncpy(result, name, size); | |
1191 free((void*)name); | |
1192 } else { | |
1193 strncpy(result, "<unknown BufferBlob>", size); | |
1194 } | |
1195 /* return PS_OK; */ | |
1196 } else { | |
1197 const char * name; | |
1198 | |
1199 err = read_string_pointer(J, start + OFFSET_CodeBlob_name, &name); | |
1200 if (err == PS_OK) { | |
1201 strncpy(result, name, size); | |
1202 free((void*)name); | |
1203 } else { | |
1204 strncpy(result, "<unknown CodeBlob>", size); | |
1205 WARN1("unknown CodeBlob: vtbl = 0x%x", vtbl); | |
1206 } | |
1207 } | |
1208 result[size-1] = '\0'; | |
1209 | |
1210 #ifdef X86_COMPILER2 | |
1211 if (vtbl != J->RuntimeStub_vtbl) { | |
1212 uint64_t trial_pc; | |
1213 int frame_size; | |
1214 err = ps_pread(J->P, start + OFFSET_CodeBlob_frame_size, | |
1215 &frame_size, SZ32); | |
1216 CHECK_FAIL(err); | |
1217 | |
1218 // frame_size is in words, we want bytes. | |
1219 frame_size *= POINTER_SIZE; /* word => byte conversion */ | |
1220 | |
1221 /* | |
1222 Because c2 doesn't use FP as a framepointer the value of sp/fp we receive | |
1223 in the initial entry to a set of stack frames containing server frames | |
1224 will pretty much be nonsense. We can detect that nonsense by looking to | |
1225 see if the PC we received is correct if we look at the expected storage | |
1226 location in relation to the FP (ie. POINTER_SIZE(FP) ) | |
1227 */ | |
1228 | |
1229 err = read_pointer(J, fp + POINTER_SIZE , &trial_pc); | |
1230 if ( (err != PS_OK || trial_pc != pc) && frame_size > 0 ) { | |
1231 // Either we couldn't even read at the "fp" or the pc didn't match | |
1232 // both are sure clues that the fp is bogus. We no search the stack | |
1233 // for a reasonable number of words trying to find the bogus fp | |
1234 // and the current pc in adjacent words. The we will be able to | |
1235 // deduce an approximation of the frame pointer and actually get | |
1236 // the correct stack pointer. Which we can then unwind for the | |
1237 // next frame. | |
1238 int i; | |
1239 uint64_t check; | |
1240 uint64_t base = J->curr_fr.sp; | |
1241 uint64_t prev_fp = 0; | |
1242 for ( i = 0; i < frame_size * 5 ; i++, base += POINTER_SIZE ) { | |
1243 err = read_pointer(J, base , &check); | |
1244 CHECK_FAIL(err); | |
1245 if (check == fp) { | |
1246 base += POINTER_SIZE; | |
1247 err = read_pointer(J, base , &check); | |
1248 CHECK_FAIL(err); | |
1249 if (check == pc) { | |
1250 if (debug) { | |
1251 fprintf(stderr, "name_for_codecache: found matching fp/pc combo at 0x%llx\n", base - POINTER_SIZE); | |
1252 } | |
1253 prev_fp = base - 2 * POINTER_SIZE; | |
1254 break; | |
1255 } | |
1256 } | |
1257 } | |
1258 if ( prev_fp != 0 ) { | |
1259 // real_sp is the sp we should have received for this frame | |
1260 uint64_t real_sp = prev_fp + 2 * POINTER_SIZE; | |
1261 // +POINTER_SIZE because callee owns the return address so caller's sp is +1 word | |
1262 jframe->new_sp = real_sp + frame_size + POINTER_SIZE; | |
1263 err = read_pointer(J, jframe->new_sp - POINTER_SIZE , &jframe->new_pc); | |
1264 CHECK_FAIL(err); | |
1265 err = read_pointer(J, jframe->new_sp - 2*POINTER_SIZE, &jframe->new_fp); | |
1266 CHECK_FAIL(err); | |
1267 return PS_OK; | |
1268 } | |
1269 } | |
1270 | |
1271 /* A prototype to workaround FP absence */ | |
1272 /* | |
1273 * frame_size can be 0 for StubRoutines (1) frame. | |
1274 * In this case it should work with fp as usual. | |
1275 */ | |
1276 if (frame_size > 0) { | |
1277 jframe->new_fp = J->prev_fr.fp + frame_size; | |
1278 jframe->new_sp = jframe->new_fp + 2 * POINTER_SIZE; | |
1279 } else { | |
1280 memset(&J->curr_fr, 0, sizeof(Frame_t)); | |
1281 err = read_pointer(J, fp, &jframe->new_fp); | |
1282 CHECK_FAIL(err); | |
1283 | |
1284 err = read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
1285 CHECK_FAIL(err); | |
1286 } | |
1287 if (debug) { | |
1288 fprintf(stderr, "name_for_codecache: %s, frame_size=%#lx\n", | |
1289 result, frame_size); | |
1290 fprintf(stderr, "name_for_codecache: prev_fr.fp=%#lx, fp=%#lx\n", | |
1291 J->prev_fr.fp, jframe->new_fp); | |
1292 } | |
1293 } | |
1294 #endif /* X86_COMPILER2 */ | |
1295 | |
1296 return PS_OK; | |
1297 | |
1298 fail: | |
1299 return err; | |
1300 } | |
1301 | |
1302 int Jget_vframe(jvm_agent_t* J, int vframe_no, | |
1303 char *name, size_t size, Jframe_t *jframe) | |
1304 { | |
1305 Nmethod_t *N = J->N; | |
1306 Vframe_t *vf; | |
1307 int32_t err; | |
1308 | |
1309 if (vframe_no >= N->vf_cnt) { | |
1310 (void) sprintf(name, "Wrong inlinedMethod%1d()", vframe_no); | |
1311 return -1; | |
1312 } | |
1313 vf = N->vframes + vframe_no; | |
1314 name[0] = COMP_METHOD_SIGN; | |
1315 err = name_for_methodOop(J, vf->methodOop, name + 1, size); | |
1316 CHECK_FAIL(err); | |
1317 | |
1318 jframe->bci = vf->bci; | |
1319 jframe->line = vf->line; | |
1320 if (debug) { | |
1321 fprintf(stderr, "\t Jget_vframe: method name: %s, line: %ld\n", | |
1322 name, vf->line); | |
1323 } | |
1324 return PS_OK; | |
1325 | |
1326 fail: | |
1327 if (debug) { | |
1328 fprintf(stderr, "\t Jget_vframe: FAIL\n"); | |
1329 } | |
1330 return err; | |
1331 } | |
1332 | |
1333 #define MAX_SYM_SIZE 256 | |
1334 | |
1335 int Jlookup_by_regs(jvm_agent_t* J, const prgregset_t regs, char *name, | |
1336 size_t size, Jframe_t *jframe) { | |
1337 uintptr_t fp; | |
1338 uintptr_t pc; | |
1339 /* arguments given to read_pointer need to be worst case sized */ | |
1340 uint64_t methodOopPtr = 0; | |
1341 uint64_t sender_sp; | |
1342 uint64_t bcx = 0; | |
1343 int is_interpreted = 0; | |
1344 int result = PS_OK; | |
1345 int err = PS_OK; | |
1346 | |
1347 if (J == NULL) { | |
1348 return -1; | |
1349 } | |
1350 | |
1351 jframe->vf_cnt = 1; | |
1352 jframe->new_fp = 0; | |
1353 jframe->new_pc = 0; | |
1354 jframe->line = 0; | |
1355 jframe->bci = 0; | |
1356 jframe->locinf = 0; | |
1357 | |
1358 read_volatiles(J); | |
1359 pc = (uintptr_t) regs[R_PC]; | |
1360 J->curr_fr.pc = pc; | |
1361 J->curr_fr.fp = regs[R_FP]; | |
1362 J->curr_fr.sp = regs[R_SP]; | |
1363 | |
1364 if (debug) | |
1365 fprintf(stderr, "Jlookup_by_regs: BEGINs: fp=%#lx, pc=%#lx\n", regs[R_FP], pc); | |
1366 | |
1367 #if defined(sparc) || defined(__sparc) | |
1368 /* The following workaround is for SPARC. CALL instruction occupates 8 bytes. | |
1369 * In the pcDesc structure return pc offset is recorded for CALL instructions. | |
1370 * regs[R_PC] contains a CALL instruction pc offset. | |
1371 */ | |
1372 pc += 8; | |
1373 bcx = (uintptr_t) regs[R_L1]; | |
1374 methodOopPtr = (uintptr_t) regs[R_L2]; | |
1375 sender_sp = regs[R_I5]; | |
1376 if (debug > 2) { | |
1377 fprintf(stderr, "\nregs[R_I1]=%lx, regs[R_I2]=%lx, regs[R_I5]=%lx, regs[R_L1]=%lx, regs[R_L2]=%lx\n", | |
1378 regs[R_I1], regs[R_I2], regs[R_I5], regs[R_L1], regs[R_L2]); | |
1379 } | |
1380 #elif defined(i386) || defined(__i386) || defined(__amd64) | |
1381 | |
1382 fp = (uintptr_t) regs[R_FP]; | |
1383 if (J->prev_fr.fp == 0) { | |
1384 #ifdef X86_COMPILER2 | |
1385 /* A workaround for top java frames */ | |
1386 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - 2 * POINTER_SIZE); | |
1387 #else | |
1388 J->prev_fr.fp = (uintptr_t)(regs[R_SP] - POINTER_SIZE); | |
1389 #endif /* COMPILER2 */ | |
1390 } | |
1391 if (debug > 2) { | |
1392 printf("Jlookup_by_regs: J->prev_fr.fp = %#lx\n", J->prev_fr.fp); | |
1393 } | |
1394 | |
1395 if (read_pointer(J, fp + OFFSET_interpreter_frame_method, &methodOopPtr) != PS_OK) { | |
1396 methodOopPtr = 0; | |
1397 } | |
1398 if (read_pointer(J, fp + OFFSET_interpreter_frame_sender_sp, &sender_sp) != PS_OK) { | |
1399 sender_sp = 0; | |
1400 } | |
1401 if (read_pointer(J, fp + OFFSET_interpreter_frame_bcx_offset, &bcx) != PS_OK) { | |
1402 bcx = 0; | |
1403 } | |
1404 #endif /* i386 */ | |
1405 | |
1406 J->methodOopPtr = methodOopPtr; | |
1407 J->bcx = bcx; | |
1408 | |
1409 /* On x86 with C2 JVM: native frame may have wrong regs[R_FP] | |
1410 * For example: JVM_SuspendThread frame poins to the top interpreted frame. | |
1411 * If we call is_methodOop(J, methodOopPtr) before codecache_contains(J, pc) | |
1412 * then we go over and omit both: nmethod and I2CAdapter frames. | |
1413 * Note, that regs[R_PC] is always correct if frame defined correctly. | |
1414 * So it is better to call codecache_contains(J, pc) from the beginning. | |
1415 */ | |
1416 #ifndef X86_COMPILER2 | |
1417 if (is_methodOop(J, J->methodOopPtr)) { | |
1418 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe); | |
1419 /* If the methodOopPtr is a method then this is highly likely to be | |
1420 an interpreter frame */ | |
1421 if (result >= 0) { | |
1422 is_interpreted = 1; | |
1423 } | |
1424 } else | |
1425 #endif /* ! X86_COMPILER2 */ | |
1426 | |
1427 if (codecache_contains(J, pc)) { | |
1428 result = name_for_codecache(J, fp, pc, name, size, jframe, &is_interpreted); | |
1429 } | |
1430 #ifdef X86_COMPILER2 | |
1431 else if (is_methodOop(J, J->methodOopPtr)) { | |
1432 result = name_for_imethod(J, bcx, J->methodOopPtr, name, size, jframe); | |
1433 /* If the methodOopPtr is a method then this is highly likely to be | |
1434 an interpreter frame */ | |
1435 if (result >= 0) { | |
1436 is_interpreted = 1; | |
1437 } | |
1438 } | |
1439 #endif /* X86_COMPILER2 */ | |
1440 else { | |
1441 if (debug) { | |
1442 fprintf(stderr, "Jlookup_by_regs: END with -1\n\n"); | |
1443 } | |
1444 result = -1; | |
1445 } | |
1446 if (!is_interpreted) { | |
1447 sender_sp = 0; | |
1448 } | |
1449 J->curr_fr.sender_sp = sender_sp; | |
1450 | |
1451 #ifdef X86_COMPILER2 | |
1452 if (!J->curr_fr.fp) { | |
1453 J->curr_fr.fp = (jframe->new_fp) ? jframe->new_fp : (uintptr_t)regs[R_FP]; | |
1454 } | |
1455 if (!jframe->new_pc && jframe->new_fp) { | |
1456 // This seems dubious | |
1457 read_pointer(J, jframe->new_fp + POINTER_SIZE, &jframe->new_pc); | |
1458 CHECK_FAIL(err); | |
1459 if (debug > 2) { | |
1460 printf("Jlookup_by_regs: (update pc) jframe->new_fp: %#llx, jframe->new_pc: %#llx\n", | |
1461 jframe->new_fp, jframe->new_pc); | |
1462 } | |
1463 } | |
1464 | |
1465 #endif /* X86_COMPILER2 */ | |
1466 J->prev_fr = J->curr_fr; | |
1467 | |
1468 if (debug) | |
1469 fprintf(stderr, "Jlookup_by_regs: END\n\n"); | |
1470 | |
1471 return result; | |
1472 | |
1473 fail: | |
1474 return err; | |
1475 } | |
1476 | |
1477 void update_gregs(prgregset_t gregs, Jframe_t jframe) { | |
1478 #ifdef X86_COMPILER2 | |
1479 if (debug > 0) { | |
1480 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]); | |
1481 } | |
1482 /* | |
1483 * A workaround for java C2 frames with unconventional FP. | |
1484 * may have to modify regset with new values for FP/PC/SP when needed. | |
1485 */ | |
1486 if (jframe.new_sp) { | |
1487 *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) jframe.new_sp; | |
1488 } else { | |
1489 // *((uintptr_t *) &gregs[R_SP]) = (uintptr_t) gregs[R_FP] + 2 * POINTER_SIZE; | |
1490 } | |
1491 | |
1492 if (jframe.new_fp) { | |
1493 *((uintptr_t *) &gregs[R_FP]) = (uintptr_t) jframe.new_fp; | |
1494 } | |
1495 if (jframe.new_pc) { | |
1496 *((uintptr_t *) &gregs[R_PC]) = (uintptr_t) jframe.new_pc; | |
1497 } | |
1498 if (debug > 0) { | |
1499 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]); | |
1500 } | |
1501 #endif /* X86_COMPILER2 */ | |
1502 } | |
1503 | |
1504 /* | |
1505 * Iterates over java frames at current location given by 'gregs'. | |
1506 * | |
1507 * Returns -1 if no java frames are present or if an error is encountered. | |
1508 * Returns the result of calling 'func' if the return value is non-zero. | |
1509 * Returns 0 otherwise. | |
1510 */ | |
1511 int Jframe_iter(jvm_agent_t *J, prgregset_t gregs, java_stack_f *func, void* cld) { | |
1512 char buf[MAX_SYM_SIZE + 1]; | |
1513 Jframe_t jframe; | |
1514 int i = 0, res; | |
1515 #ifdef X86_COMPILER2 | |
1516 if (debug > 0) { | |
1517 fprintf(stderr, "Jframe_iter: Entry sp = 0x%llx, fp = 0x%llx, pc = 0x%llx\n", gregs[R_SP], gregs[R_FP], gregs[R_PC]); | |
1518 } | |
1519 #endif /* X86_COMPILER2 */ | |
1520 | |
1521 memset(&jframe, 0, sizeof(Jframe_t)); | |
1522 memset(buf, 0, sizeof(buf)); | |
1523 res = Jlookup_by_regs(J, gregs, buf, sizeof(buf), &jframe); | |
1524 if (res != PS_OK) | |
1525 return (-1); | |
1526 | |
1527 | |
1528 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
1529 jframe.line, NULL); | |
1530 if (res != 0) { | |
1531 update_gregs(gregs, jframe); | |
1532 return (res); | |
1533 } | |
1534 for (i = 1; i < jframe.vf_cnt; i++) { | |
1535 Jget_vframe(J, i, buf, sizeof(buf), &jframe); | |
1536 res = func(cld, gregs, buf, (jframe.locinf)? jframe.bci : -1, | |
1537 jframe.line, NULL); | |
1538 if (res != 0) { | |
1539 update_gregs(gregs, jframe); | |
1540 return (res); | |
1541 } | |
1542 } | |
1543 update_gregs(gregs, jframe); | |
1544 return (0); | |
1545 } |