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Add DRD suppression patterns for races triggered by std::ostream
[valgrind.git] / coregrind / m_coredump / coredump-elf.c
blob98cf921b15691ceeb8316d2abe876f822749fb3c
1
2 /*--------------------------------------------------------------------*/
3 /*--- Dumping core. coredump-elf.c ---*/
4 /*--------------------------------------------------------------------*/
5
6 /*
7 This file is part of Valgrind, a dynamic binary instrumentation
8 framework.
9
10 Copyright (C) 2000-2017 Julian Seward
11 jseward@acm.org
12
13 This program is free software; you can redistribute it and/or
14 modify it under the terms of the GNU General Public License as
15 published by the Free Software Foundation; either version 2 of the
16 License, or (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; if not, write to the Free Software
25 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
26 02111-1307, USA.
27
28 The GNU General Public License is contained in the file COPYING.
29 */
30
31 #if defined(VGO_linux)
32
33 #include "pub_core_basics.h"
34 #include "pub_core_vki.h"
35 #include "pub_core_aspacehl.h"
36 #include "pub_core_aspacemgr.h"
37 #include "pub_core_libcbase.h"
38 #include "pub_core_machine.h"
39 #include "pub_core_coredump.h"
40 #include "pub_core_libcprint.h"
41 #include "pub_core_libcfile.h" // VG_(close) et al
42 #include "pub_core_libcproc.h" // VG_(geteuid), VG_(getegid)
43 #include "pub_core_libcassert.h" // VG_(exit), vg_assert
44 #include "pub_core_mallocfree.h" // VG_(malloc), VG_(free)
45 #include "pub_core_threadstate.h"
46 #include "pub_core_xarray.h"
47 #include "pub_core_clientstate.h"
48 #include "pub_core_options.h"
49
50 /*
51 Dump core
52
53 Generate a standard ELF core file corresponding to the client state
54 at the time of a crash.
55 */
56 #include <elf.h>
57 #ifndef NT_PRXFPREG
58 #define NT_PRXFPREG 0x46e62b7f /* copied from gdb5.1/include/elf/common.h */
59 #endif /* NT_PRXFPREG */
60
61 #if VG_WORDSIZE == 8
62 #define ESZ(x) Elf64_##x
63 #elif VG_WORDSIZE == 4
64 #define ESZ(x) Elf32_##x
65 #else
66 #error VG_WORDSIZE needs to ==4 or ==8
67 #endif
68
69 /* If true, then this Segment may be mentioned in the core */
70 static Bool may_dump(const NSegment *seg)
71 {
72 if (seg->kind == SkAnonC ||
73 seg->kind == SkShmC ||
74 (seg->kind == SkFileC &&
75 !VKI_S_ISCHR(seg->mode) && !VKI_S_ISBLK(seg->mode)))
76 return True;
77
78 return False;
79 }
80
81 /* If true, then this Segment's contents will be in the core */
82 static Bool should_dump(const NSegment *seg)
83 {
84 return may_dump(seg); // && seg->hasW;
85 }
86
87 static void fill_ehdr(ESZ(Ehdr) *ehdr, Int num_phdrs)
88 {
89 VG_(memset)(ehdr, 0, sizeof(*ehdr));
90
91 VG_(memcpy)(ehdr->e_ident, ELFMAG, SELFMAG);
92 ehdr->e_ident[EI_CLASS] = VG_ELF_CLASS;
93 ehdr->e_ident[EI_DATA] = VG_ELF_DATA2XXX;
94 ehdr->e_ident[EI_VERSION] = EV_CURRENT;
95
96 ehdr->e_type = ET_CORE;
97 ehdr->e_machine = VG_ELF_MACHINE;
98 ehdr->e_version = EV_CURRENT;
99 ehdr->e_entry = 0;
100 ehdr->e_phoff = sizeof(ESZ(Ehdr));
101 ehdr->e_shoff = 0;
102 ehdr->e_flags = 0;
103 ehdr->e_ehsize = sizeof(ESZ(Ehdr));
104 ehdr->e_phentsize = sizeof(ESZ(Phdr));
105 ehdr->e_phnum = num_phdrs;
106 ehdr->e_shentsize = 0;
107 ehdr->e_shnum = 0;
108 ehdr->e_shstrndx = 0;
109
110 }
111
112 static void fill_phdr(ESZ(Phdr) *phdr, const NSegment *seg, UInt off, Bool write)
113 {
114 SizeT len = seg->end - seg->start + 1;
115
116 write = write && should_dump(seg);
117
118 VG_(memset)(phdr, 0, sizeof(*phdr));
119
120 phdr->p_type = PT_LOAD;
121 phdr->p_offset = off;
122 phdr->p_vaddr = seg->start;
123 phdr->p_paddr = 0;
124 phdr->p_filesz = write ? len : 0;
125 phdr->p_memsz = len;
126 phdr->p_flags = 0;
127
128 if (seg->hasR)
129 phdr->p_flags |= PF_R;
130 if (seg->hasW)
131 phdr->p_flags |= PF_W;
132 if (seg->hasX)
133 phdr->p_flags |= PF_X;
134
135 phdr->p_align = VKI_PAGE_SIZE;
136 }
137
138 #if defined(VGPV_arm_linux_android) || defined(VGPV_x86_linux_android) \
139 || defined(VGPV_mips32_linux_android)
140 /* Android's libc doesn't provide a definition for this. Hence: */
141 typedef
142 struct {
143 Elf32_Word n_namesz;
144 Elf32_Word n_descsz;
145 Elf32_Word n_type;
146 }
147 Elf32_Nhdr;
148 #endif
149
150 struct note {
151 struct note *next;
152 ESZ(Nhdr) note;
153 HChar name[0];
154 };
155
156 static UInt note_size(const struct note *n)
157 {
158 return sizeof(ESZ(Nhdr)) + VG_ROUNDUP(VG_(strlen)(n->name)+1, 4)
159 + VG_ROUNDUP(n->note.n_descsz, 4);
160 }
161
162 #if !defined(VGPV_arm_linux_android) \
163 && !defined(VGPV_x86_linux_android) \
164 && !defined(VGPV_mips32_linux_android) \
165 && !defined(VGPV_arm64_linux_android)
166 static void add_note(struct note **list, const HChar *name, UInt type,
167 const void *data, UInt datasz)
168 {
169 Int namelen = VG_(strlen)(name)+1;
170 Int notelen = sizeof(struct note) +
171 VG_ROUNDUP(namelen, 4) +
172 VG_ROUNDUP(datasz, 4);
173 struct note *n = VG_(malloc)("coredump-elf.an.1", notelen);
174
175 VG_(memset)(n, 0, notelen);
176
177 n->next = *list;
178 *list = n;
179
180 n->note.n_type = type;
181 n->note.n_namesz = namelen;
182 n->note.n_descsz = datasz;
183
184 VG_(memcpy)(n->name, name, namelen);
185 VG_(memcpy)(n->name+VG_ROUNDUP(namelen,4), data, datasz);
186 }
187 #endif /* !defined(VGPV_*_linux_android) */
188
189 static void write_note(Int fd, const struct note *n)
190 {
191 VG_(write)(fd, &n->note, note_size(n));
192 }
193
194 static void fill_prpsinfo(const ThreadState *tst,
195 struct vki_elf_prpsinfo *prpsinfo)
196 {
197 VG_(memset)(prpsinfo, 0, sizeof(*prpsinfo));
198
199 switch(tst->status) {
200 case VgTs_Runnable:
201 case VgTs_Yielding:
202 prpsinfo->pr_sname = 'R';
203 break;
204
205 case VgTs_WaitSys:
206 prpsinfo->pr_sname = 'S';
207 break;
208
209 case VgTs_Zombie:
210 prpsinfo->pr_sname = 'Z';
211 break;
212
213 case VgTs_Empty:
214 case VgTs_Init:
215 prpsinfo->pr_sname = '?';
216 break;
217 }
218
219 prpsinfo->pr_uid = 0;
220 prpsinfo->pr_gid = 0;
221
222 VG_(client_fname)(prpsinfo->pr_fname, sizeof(prpsinfo->pr_fname), False);
223 }
224
225 static void fill_prstatus(const ThreadState *tst,
226 /*OUT*/struct vki_elf_prstatus *prs,
227 const vki_siginfo_t *si)
228 {
229 #if defined(VGP_mips32_linux) || defined(VGP_mips64_linux)
230 vki_elf_greg_t *regs;
231 #else
232 struct vki_user_regs_struct *regs;
233 #endif
234 const ThreadArchState* arch = &tst->arch;
235
236 VG_(memset)(prs, 0, sizeof(*prs));
237
238 prs->pr_info.si_signo = si->si_signo;
239 prs->pr_info.si_code = si->si_code;
240 prs->pr_info.si_errno = 0;
241
242 prs->pr_cursig = si->si_signo;
243
244 prs->pr_pid = tst->os_state.lwpid;
245 prs->pr_ppid = 0;
246 prs->pr_pgrp = VG_(getpgrp)();
247 prs->pr_sid = VG_(getpgrp)();
248
249 #if defined(VGP_s390x_linux)
250 /* prs->pr_reg has struct type. Need to take address. */
251 regs = (struct vki_user_regs_struct *)&(prs->pr_reg);
252 #elif defined(VGP_mips32_linux) || defined(VGP_mips64_linux)
253 regs = (vki_elf_greg_t *)prs->pr_reg;
254 #else
255 regs = (struct vki_user_regs_struct *)prs->pr_reg;
256 vg_assert(sizeof(*regs) == sizeof(prs->pr_reg));
257 #endif
258
259 #if defined(VGP_x86_linux)
260 regs->eflags = LibVEX_GuestX86_get_eflags( &arch->vex );
261 regs->esp = arch->vex.guest_ESP;
262 regs->eip = arch->vex.guest_EIP;
263
264 regs->ebx = arch->vex.guest_EBX;
265 regs->ecx = arch->vex.guest_ECX;
266 regs->edx = arch->vex.guest_EDX;
267 regs->esi = arch->vex.guest_ESI;
268 regs->edi = arch->vex.guest_EDI;
269 regs->ebp = arch->vex.guest_EBP;
270 regs->eax = arch->vex.guest_EAX;
271
272 regs->cs = arch->vex.guest_CS;
273 regs->ds = arch->vex.guest_DS;
274 regs->ss = arch->vex.guest_SS;
275 regs->es = arch->vex.guest_ES;
276 regs->fs = arch->vex.guest_FS;
277 regs->gs = arch->vex.guest_GS;
278
279 #elif defined(VGP_amd64_linux)
280 regs->eflags = LibVEX_GuestAMD64_get_rflags( &arch->vex );
281 regs->rsp = arch->vex.guest_RSP;
282 regs->rip = arch->vex.guest_RIP;
283
284 regs->rbx = arch->vex.guest_RBX;
285 regs->rcx = arch->vex.guest_RCX;
286 regs->rdx = arch->vex.guest_RDX;
287 regs->rsi = arch->vex.guest_RSI;
288 regs->rdi = arch->vex.guest_RDI;
289 regs->rbp = arch->vex.guest_RBP;
290 regs->rax = arch->vex.guest_RAX;
291 regs->r8 = arch->vex.guest_R8;
292 regs->r9 = arch->vex.guest_R9;
293 regs->r10 = arch->vex.guest_R10;
294 regs->r11 = arch->vex.guest_R11;
295 regs->r12 = arch->vex.guest_R12;
296 regs->r13 = arch->vex.guest_R13;
297 regs->r14 = arch->vex.guest_R14;
298 regs->r15 = arch->vex.guest_R15;
299
300 #elif defined(VGP_ppc32_linux)
301 # define DO(n) regs->gpr[n] = arch->vex.guest_GPR##n
302 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
303 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
304 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
305 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
306 # undef DO
307
308 regs->nip = arch->vex.guest_CIA;
309 regs->msr = 0xf032; /* pretty arbitrary */
310 regs->orig_gpr3 = arch->vex.guest_GPR3;
311 regs->ctr = arch->vex.guest_CTR;
312 regs->link = arch->vex.guest_LR;
313 regs->xer = LibVEX_GuestPPC32_get_XER( &arch->vex );
314 regs->ccr = LibVEX_GuestPPC32_get_CR( &arch->vex );
315 regs->mq = 0;
316 regs->trap = 0;
317 regs->dar = 0; /* should be fault address? */
318 regs->dsisr = 0;
319 regs->result = 0;
320
321 #elif defined(VGP_ppc64be_linux)
322 # define DO(n) regs->gpr[n] = arch->vex.guest_GPR##n
323 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
324 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
325 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
326 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
327 # undef DO
328
329 regs->nip = arch->vex.guest_CIA;
330 regs->msr = 0xf032; /* pretty arbitrary */
331 regs->orig_gpr3 = arch->vex.guest_GPR3;
332 regs->ctr = arch->vex.guest_CTR;
333 regs->link = arch->vex.guest_LR;
334 regs->xer = LibVEX_GuestPPC64_get_XER( &arch->vex );
335 regs->ccr = LibVEX_GuestPPC64_get_CR( &arch->vex );
336 /* regs->mq = 0; */
337 regs->trap = 0;
338 regs->dar = 0; /* should be fault address? */
339 regs->dsisr = 0;
340 regs->result = 0;
341
342 #elif defined(VGP_ppc64le_linux)
343 # define DO(n) regs->gpr[n] = arch->vex.guest_GPR##n
344 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
345 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
346 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
347 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
348 # undef DO
349
350 regs->nip = arch->vex.guest_CIA;
351 regs->msr = 0xf033; /* pretty arbitrary */
352 regs->orig_gpr3 = arch->vex.guest_GPR3;
353 regs->ctr = arch->vex.guest_CTR;
354 regs->link = arch->vex.guest_LR;
355 regs->xer = LibVEX_GuestPPC64_get_XER( &(arch->vex) );
356 regs->ccr = LibVEX_GuestPPC64_get_CR( &(arch->vex) );
357 /* regs->mq = 0; */
358 regs->trap = 0;
359 regs->dar = 0; /* should be fault address? */
360 regs->dsisr = 0;
361 regs->result = 0;
362
363 #elif defined(VGP_arm_linux)
364 regs->ARM_r0 = arch->vex.guest_R0;
365 regs->ARM_r1 = arch->vex.guest_R1;
366 regs->ARM_r2 = arch->vex.guest_R2;
367 regs->ARM_r3 = arch->vex.guest_R3;
368 regs->ARM_r4 = arch->vex.guest_R4;
369 regs->ARM_r5 = arch->vex.guest_R5;
370 regs->ARM_r6 = arch->vex.guest_R6;
371 regs->ARM_r7 = arch->vex.guest_R7;
372 regs->ARM_r8 = arch->vex.guest_R8;
373 regs->ARM_r9 = arch->vex.guest_R9;
374 regs->ARM_r10 = arch->vex.guest_R10;
375 regs->ARM_fp = arch->vex.guest_R11;
376 regs->ARM_ip = arch->vex.guest_R12;
377 regs->ARM_sp = arch->vex.guest_R13;
378 regs->ARM_lr = arch->vex.guest_R14;
379 regs->ARM_pc = arch->vex.guest_R15T;
380 regs->ARM_cpsr = LibVEX_GuestARM_get_cpsr( &arch->vex );
381
382 #elif defined(VGP_arm64_linux)
383 (void)arch;
384 I_die_here;
385
386 #elif defined(VGP_s390x_linux)
387 # define DO(n) regs->gprs[n] = arch->vex.guest_r##n
388 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
389 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
390 # undef DO
391 # define DO(n) regs->acrs[n] = arch->vex.guest_a##n
392 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
393 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
394 # undef DO
395 regs->orig_gpr2 = arch->vex.guest_r2;
396
397 #elif defined(VGP_mips32_linux)
398 # define DO(n) regs[VKI_MIPS32_EF_R##n] = arch->vex.guest_r##n
399 DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7); DO(8);
400 DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15); DO(16);
401 DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23); DO(24);
402 DO(25); DO(28); DO(29); DO(30); DO(31);
403 # undef DO
404 regs[VKI_MIPS32_EF_LO] = arch->vex.guest_LO;
405 regs[VKI_MIPS32_EF_HI] = arch->vex.guest_HI;
406 regs[VKI_MIPS32_EF_CP0_STATUS] = arch->vex.guest_CP0_status;
407 regs[VKI_MIPS32_EF_CP0_EPC] = arch->vex.guest_PC;
408 #elif defined(VGP_mips64_linux)
409 # define DO(n) regs[VKI_MIPS64_EF_R##n] = arch->vex.guest_r##n
410 DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7); DO(8);
411 DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15); DO(16);
412 DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23); DO(24);
413 DO(25); DO(28); DO(29); DO(30); DO(31);
414 # undef DO
415 regs[VKI_MIPS64_EF_LO] = arch->vex.guest_LO;
416 regs[VKI_MIPS64_EF_HI] = arch->vex.guest_HI;
417 regs[VKI_MIPS64_EF_CP0_STATUS] = arch->vex.guest_CP0_status;
418 regs[VKI_MIPS64_EF_CP0_EPC] = arch->vex.guest_PC;
419 #else
420 # error Unknown ELF platform
421 #endif
422 }
423
424 static void fill_fpu(const ThreadState *tst, vki_elf_fpregset_t *fpu)
425 {
426 __attribute__((unused))
427 const ThreadArchState* arch = &tst->arch;
428
429 #if defined(VGP_x86_linux)
430 //:: static void fill_fpu(vki_elf_fpregset_t *fpu, const HChar *from)
431 //:: {
432 //:: if (VG_(have_ssestate)) {
433 //:: UShort *to;
434 //:: Int i;
435 //::
436 //:: /* This is what the kernel does */
437 //:: VG_(memcpy)(fpu, from, 7*sizeof(long));
438 //::
439 //:: to = (UShort *)&fpu->st_space[0];
440 //:: from += 18 * sizeof(UShort);
441 //::
442 //:: for (i = 0; i < 8; i++, to += 5, from += 8)
443 //:: VG_(memcpy)(to, from, 5*sizeof(UShort));
444 //:: } else
445 //:: VG_(memcpy)(fpu, from, sizeof(*fpu));
446 //:: }
447
448 //:: fill_fpu(fpu, (const HChar *)&arch->m_sse);
449
450 #elif defined(VGP_amd64_linux)
451 //:: fpu->cwd = ?;
452 //:: fpu->swd = ?;
453 //:: fpu->twd = ?;
454 //:: fpu->fop = ?;
455 //:: fpu->rip = ?;
456 //:: fpu->rdp = ?;
457 //:: fpu->mxcsr = ?;
458 //:: fpu->mxcsr_mask = ?;
459 //:: fpu->st_space = ?;
460
461 # define DO(n) VG_(memcpy)(fpu->xmm_space + n * 4, \
462 &arch->vex.guest_YMM##n[0], 16)
463 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
464 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
465 # undef DO
466
467 VG_(memset)(fpu->padding, 0, sizeof(fpu->padding));
468
469 #elif defined(VGP_ppc32_linux)
470 /* The guest state has the FPR fields declared as ULongs, so need
471 to fish out the values without converting them.
472 NOTE: The 32 FP registers map to the first 32 VSX registers.*/
473 # define DO(n) (*fpu)[n] = *(double*)(&arch->vex.guest_VSR##n)
474 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
475 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
476 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
477 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
478 # undef DO
479
480 #elif defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux)
481 /* The guest state has the FPR fields declared as ULongs, so need
482 to fish out the values without converting them.
483 NOTE: The 32 FP registers map to the first 32 VSX registers.*/
484 # define DO(n) (*fpu)[n] = *(double*)(&arch->vex.guest_VSR##n)
485 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
486 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
487 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
488 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
489 # undef DO
490
491 #elif defined(VGP_arm_linux)
492 // umm ...
493
494 #elif defined(VGP_arm64_linux)
495 I_die_here;
496
497 #elif defined(VGP_s390x_linux)
498 /* NOTE: The 16 FP registers map to the first 16 VSX registers. */
499 # define DO(n) fpu->fprs[n].ui = *(const Double*)(&arch->vex.guest_v##n.w64[0])
500 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
501 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
502 # undef DO
503 #elif defined(VGP_mips32_linux) || defined(VGP_mips64_linux)
504 # define DO(n) (*fpu)[n] = *(const double*)(&arch->vex.guest_f##n)
505 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
506 DO(8); DO(9); DO(10); DO(11); DO(12); DO(13); DO(14); DO(15);
507 DO(16); DO(17); DO(18); DO(19); DO(20); DO(21); DO(22); DO(23);
508 DO(24); DO(25); DO(26); DO(27); DO(28); DO(29); DO(30); DO(31);
509 # undef DO
510 #else
511 # error Unknown ELF platform
512 #endif
513 }
514
515 #if defined(VGP_x86_linux) && !defined(VGPV_x86_linux_android)
516 static void fill_xfpu(const ThreadState *tst, vki_elf_fpxregset_t *xfpu)
517 {
518 const ThreadArchState* arch = &tst->arch;
519
520 //:: xfpu->cwd = ?;
521 //:: xfpu->swd = ?;
522 //:: xfpu->twd = ?;
523 //:: xfpu->fop = ?;
524 //:: xfpu->fip = ?;
525 //:: xfpu->fcs = ?;
526 //:: xfpu->foo = ?;
527 //:: xfpu->fos = ?;
528 //:: xfpu->mxcsr = ?;
529 xfpu->reserved = 0;
530 //:: xfpu->st_space = ?;
531
532 # define DO(n) VG_(memcpy)(xfpu->xmm_space + n * 4, &arch->vex.guest_XMM##n, sizeof(arch->vex.guest_XMM##n))
533 DO(0); DO(1); DO(2); DO(3); DO(4); DO(5); DO(6); DO(7);
534 # undef DO
535
536 VG_(memset)(xfpu->padding, 0, sizeof(xfpu->padding));
537 }
538 #endif
539
540 static
541 void dump_one_thread(struct note **notelist, const vki_siginfo_t *si, ThreadId tid)
542 {
543 vki_elf_fpregset_t fpu;
544 struct vki_elf_prstatus prstatus;
545 # if defined(VGP_x86_linux) && !defined(VGPV_x86_linux_android)
546 {
547 vki_elf_fpxregset_t xfpu;
548 fill_xfpu(&VG_(threads)[tid], &xfpu);
549 add_note(notelist, "LINUX", NT_PRXFPREG, &xfpu, sizeof(xfpu));
550 }
551 # endif
552
553 fill_fpu(&VG_(threads)[tid], &fpu);
554 # if !defined(VGPV_arm_linux_android) \
555 && !defined(VGPV_x86_linux_android) \
556 && !defined(VGPV_mips32_linux_android) \
557 && !defined(VGPV_arm64_linux_android)
558 add_note(notelist, "CORE", NT_FPREGSET, &fpu, sizeof(fpu));
559 # endif
560
561 fill_prstatus(&VG_(threads)[tid], &prstatus, si);
562 # if !defined(VGPV_arm_linux_android) \
563 && !defined(VGPV_x86_linux_android) \
564 && !defined(VGPV_mips32_linux_android) \
565 && !defined(VGPV_arm64_linux_android)
566 add_note(notelist, "CORE", NT_PRSTATUS, &prstatus, sizeof(prstatus));
567 # endif
568 }
569
570 static
571 void make_elf_coredump(ThreadId tid, const vki_siginfo_t *si, ULong max_size)
572 {
573 HChar* buf = NULL;
574 const HChar *basename = "vgcore";
575 const HChar *coreext = "";
576 Int seq = 0;
577 Int core_fd;
578 NSegment const * seg;
579 ESZ(Ehdr) ehdr;
580 ESZ(Phdr) *phdrs;
581 Int num_phdrs;
582 Int i, idx;
583 UInt off;
584 struct note *notelist, *note;
585 UInt notesz;
586 struct vki_elf_prpsinfo prpsinfo;
587 Addr *seg_starts;
588 Int n_seg_starts;
589
590 if (VG_(clo_log_fname_unexpanded) != NULL) {
591 coreext = ".core";
592 basename = VG_(expand_file_name)("--log-file",
593 VG_(clo_log_fname_unexpanded));
594 }
595
596 vg_assert(coreext);
597 vg_assert(basename);
598 buf = VG_(malloc)( "coredump-elf.mec.1",
599 VG_(strlen)(coreext) + VG_(strlen)(basename)
600 + 100/*for the two %ds. */ );
601
602 for(;;) {
603 Int oflags = VKI_O_CREAT|VKI_O_WRONLY|VKI_O_EXCL|VKI_O_TRUNC;
604 SysRes sres;
605
606 if (seq == 0)
607 VG_(sprintf)(buf, "%s%s.%d",
608 basename, coreext, VG_(getpid)());
609 else
610 VG_(sprintf)(buf, "%s%s.%d.%d",
611 basename, coreext, VG_(getpid)(), seq);
612 seq++;
613
614 # if defined(VKI_O_LARGEFILE)
615 oflags |= VKI_O_LARGEFILE;
616 # endif
617
618 sres = VG_(open)(buf, oflags, VKI_S_IRUSR|VKI_S_IWUSR);
619 if (!sr_isError(sres)) {
620 core_fd = sr_Res(sres);
621 break;
622 }
623
624 if (sr_isError(sres) && sr_Err(sres) != VKI_EEXIST)
625 return; /* can't create file */
626 }
627
628 /* Get the client segments */
629 seg_starts = VG_(get_segment_starts)(SkFileC | SkAnonC | SkShmC,
630 &n_seg_starts);
631
632 /* First, count how many memory segments to dump */
633 num_phdrs = 1; /* start with notes */
634 for(i = 0; i < n_seg_starts; i++) {
635 if (!may_dump(VG_(am_find_nsegment)(seg_starts[i])))
636 continue;
637
638 num_phdrs++;
639 }
640
641 fill_ehdr(&ehdr, num_phdrs);
642
643 notelist = NULL;
644
645 /* Second, work out their layout */
646 phdrs = VG_(malloc)("coredump-elf.mec.1", sizeof(*phdrs) * num_phdrs);
647
648 /* Add details for all threads except the one that faulted */
649 for(i = 1; i < VG_N_THREADS; i++) {
650
651 if (VG_(threads)[i].status == VgTs_Empty)
652 continue;
653
654 if (i == tid)
655 continue;
656
657 dump_one_thread(&notelist, si, i);
658 }
659
660 /* Add details for the faulting thread. Note that because we are
661 adding to the head of a linked list this thread will actually
662 come out first in the core file, which seems to be how
663 debuggers determine that it is the faulting thread. */
664 dump_one_thread(&notelist, si, tid);
665
666 fill_prpsinfo(&VG_(threads)[tid], &prpsinfo);
667 # if !defined(VGPV_arm_linux_android) \
668 && !defined(VGPV_x86_linux_android) \
669 && !defined(VGPV_mips32_linux_android) \
670 && !defined(VGPV_arm64_linux_android)
671 add_note(&notelist, "CORE", NT_PRPSINFO, &prpsinfo, sizeof(prpsinfo));
672 # endif
673
674 for (note = notelist, notesz = 0; note != NULL; note = note->next)
675 notesz += note_size(note);
676
677 off = sizeof(ehdr) + sizeof(*phdrs) * num_phdrs;
678
679 phdrs[0].p_type = PT_NOTE;
680 phdrs[0].p_offset = off;
681 phdrs[0].p_vaddr = 0;
682 phdrs[0].p_paddr = 0;
683 phdrs[0].p_filesz = notesz;
684 phdrs[0].p_memsz = 0;
685 phdrs[0].p_flags = 0;
686 phdrs[0].p_align = 0;
687
688 off += notesz;
689
690 off = VG_PGROUNDUP(off);
691
692 for(i = 0, idx = 1; i < n_seg_starts; i++) {
693 seg = VG_(am_find_nsegment)(seg_starts[i]);
694
695 if (!may_dump(seg))
696 continue;
697
698 fill_phdr(&phdrs[idx], seg, off,
699 (seg->end - seg->start + 1 + off) < max_size);
700
701 off += phdrs[idx].p_filesz;
702
703 idx++;
704 }
705
706 /* write everything out */
707 VG_(write)(core_fd, &ehdr, sizeof(ehdr));
708 VG_(write)(core_fd, phdrs, sizeof(*phdrs) * num_phdrs);
709
710 for(note = notelist; note != NULL; note = note->next)
711 write_note(core_fd, note);
712
713 VG_(lseek)(core_fd, phdrs[1].p_offset, VKI_SEEK_SET);
714
715 for(i = 0, idx = 1; i < n_seg_starts; i++) {
716 seg = VG_(am_find_nsegment)(seg_starts[i]);
717
718 if (!should_dump(seg))
719 continue;
720
721 if (phdrs[idx].p_filesz > 0) {
722 vg_assert(VG_(lseek)(core_fd, phdrs[idx].p_offset, VKI_SEEK_SET)
723 == phdrs[idx].p_offset);
724 vg_assert(seg->end - seg->start + 1 >= phdrs[idx].p_filesz);
725
726 (void)VG_(write)(core_fd, (void *)seg->start, phdrs[idx].p_filesz);
727 }
728 idx++;
729 }
730
731 VG_(free)(seg_starts);
732
733 VG_(close)(core_fd);
734 }
735
736 void VG_(make_coredump)(ThreadId tid, const vki_siginfo_t *si, ULong max_size)
737 {
738 make_elf_coredump(tid, si, max_size);
739 }
740
741 #endif // defined(VGO_linux)
742
743 /*--------------------------------------------------------------------*/
744 /*--- end ---*/
745 /*--------------------------------------------------------------------*/
Instrumentation framework for detecting many memory management and threading bugs, and profile your programs in detail.