1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567
|
/*--------------------------------------------------------------------*/
/*--- Assertions and panics. m_libcassert.c ---*/
/*--------------------------------------------------------------------*/
/*
This file is part of Valgrind, a dynamic binary instrumentation
framework.
Copyright (C) 2000-2017 Julian Seward
jseward@acm.org
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307, USA.
The GNU General Public License is contained in the file COPYING.
*/
#include "pub_core_basics.h"
#include "pub_core_vki.h"
#include "pub_core_vkiscnums.h"
#include "pub_core_threadstate.h"
#include "pub_core_gdbserver.h"
#include "pub_core_aspacemgr.h"
#include "pub_core_libcbase.h"
#include "pub_core_libcassert.h"
#include "pub_core_libcprint.h"
#include "pub_core_libcproc.h" // For VG_(gettid)()
#include "pub_core_machine.h"
#include "pub_core_stacks.h"
#include "pub_core_stacktrace.h"
#include "pub_core_syscall.h"
#include "pub_core_syswrap.h"
#include "pub_core_tooliface.h" // For VG_(details).{name,bug_reports_to}
#include "pub_core_options.h" // For VG_(clo_xml)
/* ---------------------------------------------------------------------
Assertery.
------------------------------------------------------------------ */
#if defined(VGP_x86_linux) || defined(VGP_x86_darwin) \
|| defined(VGP_x86_solaris)
# define GET_STARTREGS(srP) \
{ UInt eip, esp, ebp; \
__asm__ __volatile__( \
"call 0f;" \
"0: popl %0;" \
"movl %%esp, %1;" \
"movl %%ebp, %2;" \
: "=r" (eip), "=r" (esp), "=r" (ebp) \
: /* reads none */ \
: "memory" \
); \
(srP)->r_pc = (ULong)eip; \
(srP)->r_sp = (ULong)esp; \
(srP)->misc.X86.r_ebp = ebp; \
}
#elif defined(VGP_amd64_linux) || defined(VGP_amd64_darwin) \
|| defined(VGP_amd64_solaris)
# define GET_STARTREGS(srP) \
{ ULong rip, rsp, rbp; \
__asm__ __volatile__( \
"leaq 0(%%rip), %0;" \
"movq %%rsp, %1;" \
"movq %%rbp, %2;" \
: "=r" (rip), "=r" (rsp), "=r" (rbp) \
: /* reads none */ \
: "memory" \
); \
(srP)->r_pc = rip; \
(srP)->r_sp = rsp; \
(srP)->misc.AMD64.r_rbp = rbp; \
}
#elif defined(VGP_ppc32_linux)
# define GET_STARTREGS(srP) \
{ UInt cia, r1, lr; \
__asm__ __volatile__( \
"mflr 0;" /* r0 = lr */ \
"bl 0f;" /* lr = pc */ \
"0:\n" \
"mflr %0;" /* %0 = pc */ \
"mtlr 0;" /* restore lr */ \
"mr %1,1;" /* %1 = r1 */ \
"mr %2,0;" /* %2 = lr */ \
: "=r" (cia), "=r" (r1), "=r" (lr) \
: /* reads none */ \
: "r0" /* trashed */ \
); \
(srP)->r_pc = (ULong)cia; \
(srP)->r_sp = (ULong)r1; \
(srP)->misc.PPC32.r_lr = lr; \
}
#elif defined(VGP_ppc64be_linux) || defined(VGP_ppc64le_linux)
# define GET_STARTREGS(srP) \
{ ULong cia, r1, lr; \
__asm__ __volatile__( \
"mflr 0;" /* r0 = lr */ \
"bl 0f;" /* lr = pc */ \
"0:\n" \
"mflr %0;" /* %0 = pc */ \
"mtlr 0;" /* restore lr */ \
"mr %1,1;" /* %1 = r1 */ \
"mr %2,0;" /* %2 = lr */ \
: "=r" (cia), "=r" (r1), "=r" (lr) \
: /* reads none */ \
: "r0" /* trashed */ \
); \
(srP)->r_pc = cia; \
(srP)->r_sp = r1; \
(srP)->misc.PPC64.r_lr = lr; \
}
#elif defined(VGP_arm_linux)
# define GET_STARTREGS(srP) \
{ UInt block[6]; \
__asm__ __volatile__( \
"str r15, [%0, #+0];" \
"str r14, [%0, #+4];" \
"str r13, [%0, #+8];" \
"str r12, [%0, #+12];" \
"str r11, [%0, #+16];" \
"str r7, [%0, #+20];" \
: /* out */ \
: /* in */ "r"(&block[0]) \
: /* trash */ "memory" \
); \
(srP)->r_pc = block[0] - 8; \
(srP)->misc.ARM.r14 = block[1]; \
(srP)->r_sp = block[2]; \
(srP)->misc.ARM.r12 = block[3]; \
(srP)->misc.ARM.r11 = block[4]; \
(srP)->misc.ARM.r7 = block[5]; \
}
#elif defined(VGP_arm64_linux)
# define GET_STARTREGS(srP) \
{ ULong block[4]; \
__asm__ __volatile__( \
"adr x19, 0;" \
"str x19, [%0, #+0];" /* pc */ \
"mov x19, sp;" \
"str x19, [%0, #+8];" /* sp */ \
"str x29, [%0, #+16];" /* fp */ \
"str x30, [%0, #+24];" /* lr */ \
: /* out */ \
: /* in */ "r"(&block[0]) \
: /* trash */ "memory","x19" \
); \
(srP)->r_pc = block[0]; \
(srP)->r_sp = block[1]; \
(srP)->misc.ARM64.x29 = block[2]; \
(srP)->misc.ARM64.x30 = block[3]; \
}
#elif defined(VGP_s390x_linux)
# define GET_STARTREGS(srP) \
{ ULong ia, sp, fp, lr; \
__asm__ __volatile__( \
"bras %0,0f;" \
"0: lgr %1,15;" \
"lgr %2,11;" \
"lgr %3,14;" \
: "=r" (ia), "=r" (sp),"=r" (fp),"=r" (lr) \
/* no read & clobber */ \
); \
(srP)->r_pc = ia; \
(srP)->r_sp = sp; \
(srP)->misc.S390X.r_fp = fp; \
(srP)->misc.S390X.r_lr = lr; \
}
#elif defined(VGP_mips32_linux)
# define GET_STARTREGS(srP) \
{ UInt pc, sp, fp, ra, gp; \
asm("move $8, $31;" /* t0 = ra */ \
"bal 0f;" /* ra = pc */ \
"0:\n" \
"move %0, $31;" \
"move $31, $8;" /* restore lr */ \
"move %1, $29;" \
"move %2, $30;" \
"move %3, $31;" \
"move %4, $28;" \
: "=r" (pc), \
"=r" (sp), \
"=r" (fp), \
"=r" (ra), \
"=r" (gp) \
: /* reads none */ \
: "$8" /* trashed */ ); \
(srP)->r_pc = (ULong)pc - 8; \
(srP)->r_sp = (ULong)sp; \
(srP)->misc.MIPS32.r30 = (ULong)fp; \
(srP)->misc.MIPS32.r31 = (ULong)ra; \
(srP)->misc.MIPS32.r28 = (ULong)gp; \
}
#elif defined(VGP_mips64_linux)
# define GET_STARTREGS(srP) \
{ ULong pc, sp, fp, ra, gp; \
asm("move $8, $31;" /* t0 = ra */ \
"bal 0f;" /* ra = pc */ \
"0:\n" \
"move %0, $31;" \
"move $31, $8;" /* restore lr */ \
"move %1, $29;" \
"move %2, $30;" \
"move %3, $31;" \
"move %4, $28;" \
: "=r" (pc), \
"=r" (sp), \
"=r" (fp), \
"=r" (ra), \
"=r" (gp) \
: /* reads none */ \
: "$8" /* trashed */ ); \
(srP)->r_pc = (ULong)pc - 8; \
(srP)->r_sp = (ULong)sp; \
(srP)->misc.MIPS64.r30 = (ULong)fp; \
(srP)->misc.MIPS64.r31 = (ULong)ra; \
(srP)->misc.MIPS64.r28 = (ULong)gp; \
}
#else
# error Unknown platform
#endif
#define BACKTRACE_DEPTH 100 // nice and deep!
__attribute__ ((__noreturn__))
static void exit_wrk( Int status, Bool gdbserver_call_allowed)
{
static Bool exit_called = False;
// avoid recursive exit during gdbserver call.
if (gdbserver_call_allowed && !exit_called) {
const ThreadId atid = 1; // Arbitrary tid used to call/terminate gdbsrv.
exit_called = True;
if (status != 0
&& VgdbStopAtiS(VgdbStopAt_ValgrindAbExit, VG_(clo_vgdb_stop_at))) {
if (VG_(gdbserver_init_done)()) {
VG_(umsg)("(action at valgrind abnormal exit) vgdb me ... \n");
VG_(gdbserver) (atid);
} else {
VG_(umsg)("(action at valgrind abnormal exit)\n"
"valgrind exit is too early => vgdb not yet usable\n");
}
}
if (VG_(gdbserver_init_done)()) {
// Always terminate the gdbserver when Valgrind exits, so as
// to e.g. cleanup the FIFOs.
VG_(gdbserver_exit) (atid,
status == 0 ? VgSrc_ExitProcess : VgSrc_FatalSig);
}
}
exit_called = True;
VG_(exit_now) (status);
}
/* Call the appropriate system call and nothing else. This function should
be called in places where the dependencies of VG_(exit) need to be
avoided. */
__attribute__ ((__noreturn__))
void VG_(exit_now)( Int status )
{
#if defined(VGO_linux)
(void)VG_(do_syscall1)(__NR_exit_group, status );
#elif defined(VGO_darwin) || defined(VGO_solaris)
(void)VG_(do_syscall1)(__NR_exit, status );
#else
# error Unknown OS
#endif
/*NOTREACHED*/
// We really shouldn't reach here. Just in case we do, use some very crude
// methods to force abort
__builtin_trap();
*(volatile Int*)0 = 'x';
}
/* Pull down the entire world */
void VG_(exit)( Int status )
{
exit_wrk (status, True);
}
/* Pull down the entire world */
void VG_(client_exit)( Int status )
{
exit_wrk (status, False);
}
static void print_thread_state (Bool stack_usage,
const HChar* prefix, ThreadId i)
{
VgStack *stack
= (VgStack*)VG_(threads)[i].os_state.valgrind_stack_base;
HChar syscallno[50];
// must be large enough for VG_SYSNUM_STRING result + 10.
if (VG_(is_in_syscall) (i))
VG_(sprintf)(syscallno, " syscall %s",
VG_SYSNUM_STRING(VG_(is_in_syscall_no)(i)));
else
syscallno[0] = 0;
VG_(printf)("\n%sThread %d: status = %s%s (lwpid %d)\n", prefix, i,
VG_(name_of_ThreadStatus)(VG_(threads)[i].status),
syscallno,
VG_(threads)[i].os_state.lwpid);
if (VG_(threads)[i].status != VgTs_Empty)
VG_(get_and_pp_StackTrace)( i, BACKTRACE_DEPTH );
if (stack_usage && VG_(threads)[i].client_stack_highest_byte != 0 ) {
Addr start, end;
start = end = 0;
VG_(stack_limits)(VG_(get_SP)(i), &start, &end);
if (start != end)
VG_(printf)("%sclient stack range: [%p %p] client SP: %p\n",
prefix,
(void*)start, (void*)end, (void*)VG_(get_SP)(i));
else
VG_(printf)("%sclient stack range: ??????? client SP: %p\n",
prefix,
(void*)VG_(get_SP)(i));
}
if (stack_usage && stack != 0) {
Addr stack_low_addr = VG_(am_valgrind_stack_low_addr) (stack);
VG_(printf)
("%svalgrind stack range: [%p %p] top usage: %lu of %lu\n",
prefix,
(void*)stack_low_addr,
(void*)(stack_low_addr + VG_(clo_valgrind_stacksize) - 1),
VG_(clo_valgrind_stacksize)
- VG_(am_get_VgStack_unused_szB) (stack,
VG_(clo_valgrind_stacksize)),
(SizeT) VG_(clo_valgrind_stacksize));
}
}
// Print the scheduler status.
static void show_sched_status_wrk ( Bool host_stacktrace,
Bool stack_usage,
Bool exited_threads,
const UnwindStartRegs* startRegsIN)
{
Int i;
if (host_stacktrace) {
const Bool save_clo_xml = VG_(clo_xml);
Addr stacktop;
Addr ips[BACKTRACE_DEPTH];
Int n_ips;
ThreadState *tst
= VG_(get_ThreadState)( VG_(lwpid_to_vgtid_dead_ok)(VG_(gettid)()));
// If necessary, fake up an ExeContext which is of our actual real CPU
// state. Could cause problems if we got the panic/exception within the
// execontext/stack dump/symtab code. But it's better than nothing.
UnwindStartRegs startRegs;
VG_(memset)(&startRegs, 0, sizeof(startRegs));
if (startRegsIN == NULL) {
GET_STARTREGS(&startRegs);
} else {
startRegs = *startRegsIN;
}
stacktop = tst->os_state.valgrind_stack_init_SP;
n_ips =
VG_(get_StackTrace_wrk)(
0/*tid is unknown*/,
ips, BACKTRACE_DEPTH,
NULL/*array to dump SP values in*/,
NULL/*array to dump FP values in*/,
&startRegs, stacktop
);
VG_(printf)("\nhost stacktrace:\n");
VG_(clo_xml) = False;
VG_(pp_StackTrace) (VG_(current_DiEpoch)(), ips, n_ips);
VG_(clo_xml) = save_clo_xml;
}
VG_(printf)("\nsched status:\n");
if (VG_(threads) == NULL) {
VG_(printf)(" scheduler not yet initialised\n");
} else {
VG_(printf)(" running_tid=%u\n", VG_(get_running_tid)());
for (i = 1; i < VG_N_THREADS; i++) {
VgStack *stack
= (VgStack*)VG_(threads)[i].os_state.valgrind_stack_base;
/* If a thread slot was never used (yet), valgrind_stack_base is 0.
If a thread slot is used by a thread or was used by a thread which
has exited, then valgrind_stack_base points to the stack base. */
if (VG_(threads)[i].status == VgTs_Empty
&& (!exited_threads || stack == 0)) continue;
print_thread_state(stack_usage, "", i);
if (VG_(inner_threads) != NULL) {
/* An inner V has informed us (the outer) of its thread array.
Report the inner guest stack trace. */
UInt inner_tid;
for (inner_tid = 1; inner_tid < VG_N_THREADS; inner_tid++) {
if (VG_(threads)[i].os_state.lwpid
== VG_(inner_threads)[inner_tid].os_state.lwpid) {
ThreadState* save_outer_vg_threads = VG_(threads);
VG_(threads) = VG_(inner_threads);
print_thread_state(stack_usage, "INNER ", inner_tid);
VG_(threads) = save_outer_vg_threads;
break;
}
}
}
}
}
VG_(printf)("\n");
}
void VG_(show_sched_status) ( Bool host_stacktrace,
Bool stack_usage,
Bool exited_threads)
{
show_sched_status_wrk (host_stacktrace,
stack_usage,
exited_threads,
NULL);
}
__attribute__ ((noreturn))
static void report_and_quit ( const HChar* report,
const UnwindStartRegs* startRegsIN )
{
show_sched_status_wrk (True, // host_stacktrace
True, // stack_usage
False, // exited_threads
startRegsIN);
VG_(printf)(
"\n"
"Note: see also the FAQ in the source distribution.\n"
"It contains workarounds to several common problems.\n"
"In particular, if Valgrind aborted or crashed after\n"
"identifying problems in your program, there's a good chance\n"
"that fixing those problems will prevent Valgrind aborting or\n"
"crashing, especially if it happened in m_mallocfree.c.\n"
"\n"
"If that doesn't help, please report this bug to: %s\n\n"
"In the bug report, send all the above text, the valgrind\n"
"version, and what OS and version you are using. Thanks.\n\n",
report);
VG_(exit)(1);
}
void VG_(assert_fail) ( Bool isCore, const HChar* expr, const HChar* file,
Int line, const HChar* fn, const HChar* format, ... )
{
va_list vargs, vargs_copy;
const HChar* component;
const HChar* bugs_to;
UInt written;
static Bool entered = False;
if (entered)
VG_(exit)(2);
entered = True;
if (isCore) {
component = "valgrind";
bugs_to = VG_BUGS_TO;
} else {
component = VG_(details).name;
bugs_to = VG_(details).bug_reports_to;
}
if (VG_(clo_xml))
VG_(printf_xml)("</valgrindoutput>\n");
// Treat vg_assert2(0, "foo") specially, as a panicky abort
if (VG_STREQ(expr, "0")) {
VG_(printf)("\n%s: %s:%d (%s): the 'impossible' happened.\n",
component, file, line, fn );
} else {
VG_(printf)("\n%s: %s:%d (%s): Assertion '%s' failed.\n",
component, file, line, fn, expr );
}
/* Check whether anything will be written */
HChar buf[5];
va_start(vargs, format);
va_copy(vargs_copy, vargs);
written = VG_(vsnprintf) ( buf, sizeof(buf), format, vargs );
va_end(vargs);
if (written > 0) {
VG_(printf)("%s: ", component);
VG_(vprintf)(format, vargs_copy);
VG_(printf)("\n");
}
report_and_quit(bugs_to, NULL);
}
__attribute__ ((noreturn))
static void panic ( const HChar* name, const HChar* report, const HChar* str,
const UnwindStartRegs* startRegs )
{
if (VG_(clo_xml))
VG_(printf_xml)("</valgrindoutput>\n");
VG_(printf)("\n%s: the 'impossible' happened:\n %s\n", name, str);
report_and_quit(report, startRegs);
}
void VG_(core_panic_at) ( const HChar* str, const UnwindStartRegs* startRegs )
{
panic("valgrind", VG_BUGS_TO, str, startRegs);
}
void VG_(core_panic) ( const HChar* str )
{
VG_(core_panic_at)(str, NULL);
}
void VG_(tool_panic) ( const HChar* str )
{
panic(VG_(details).name, VG_(details).bug_reports_to, str, NULL);
}
/* Print some helpful-ish text about unimplemented things, and give up. */
void VG_(unimplemented) ( const HChar* format, ... )
{
va_list vargs;
HChar msg[256];
va_start(vargs, format);
VG_(vsnprintf)(msg, sizeof(msg), format, vargs);
va_end(vargs);
if (VG_(clo_xml))
VG_(printf_xml)("</valgrindoutput>\n");
VG_(umsg)("\n");
VG_(umsg)("Valgrind detected that your program requires\n");
VG_(umsg)("the following unimplemented functionality:\n");
VG_(umsg)(" %s\n", msg);
VG_(umsg)("This may be because the functionality is hard to implement,\n");
VG_(umsg)("or because no reasonable program would behave this way,\n");
VG_(umsg)("or because nobody has yet needed it. "
"In any case, let us know at\n");
VG_(umsg)("%s and/or try to work around the problem, if you can.\n",
VG_BUGS_TO);
VG_(umsg)("\n");
VG_(umsg)("Valgrind has to exit now. Sorry. Bye!\n");
VG_(umsg)("\n");
VG_(show_sched_status)(False, // host_stacktrace
False, // stack_usage
False); // exited_threads
VG_(exit)(1);
}
/*--------------------------------------------------------------------*/
/*--- end ---*/
/*--------------------------------------------------------------------*/
|