tests/lib/libc/gen/t_siginfo.c

   1 /* $NetBSD: t_siginfo.c,v 1.29 2015/02/17 09:47:08 isaki Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <atf-c.h>
  30
  31 #include <sys/inttypes.h>
  32 #include <sys/resource.h>
  33 #include <sys/sysctl.h>
  34 #include <sys/time.h>
  35 #include <sys/ucontext.h>
  36 #include <sys/wait.h>
  37
  38 #include <assert.h>
  39 #include <signal.h>
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <unistd.h>
  44 #include <setjmp.h>
  45 #include <float.h>
  46
  47 #ifdef HAVE_FENV
  48 #include <fenv.h>
  49 #include <ieeefp.h>     /* only need for ARM Cortex/Neon hack */
  50 #elif defined(_FLOAT_IEEE754)
  51 #include <ieeefp.h>
  52 #endif
  53
  54 #include "isqemu.h"
  55
  56 /* for sigbus */
  57 volatile char *addr;
  58
  59 /* for sigchild */
  60 pid_t child;
  61 int code;
  62 int status;
  63
  64 /* for sigfpe */
  65 sig_atomic_t fltdiv_signalled = 0;
  66 sig_atomic_t intdiv_signalled = 0;
  67
  68 static void
  69 sig_debug(int signo, siginfo_t *info, ucontext_t *ctx)
  70 {
  71         unsigned int i;
  72
  73         printf("%d %p %p\n", signo, info, ctx);
  74         if (info != NULL) {
  75                 printf("si_signo=%d\n", info->si_signo);
  76                 printf("si_errno=%d\n", info->si_errno);
  77                 printf("si_code=%d\n", info->si_code);
  78                 printf("si_value.sival_int=%d\n", info->si_value.sival_int);
  79         }
  80         if (ctx != NULL) {
  81                 printf("uc_flags 0x%x\n", ctx->uc_flags);
  82                 printf("uc_link %p\n", ctx->uc_link);
  83                 for (i = 0; i < __arraycount(ctx->uc_sigmask.__bits); i++)
  84                         printf("uc_sigmask[%d] 0x%x\n", i,
  85                             ctx->uc_sigmask.__bits[i]);
  86                 printf("uc_stack %p %lu 0x%x\n", ctx->uc_stack.ss_sp,
  87                     (unsigned long)ctx->uc_stack.ss_size,
  88                     ctx->uc_stack.ss_flags);
  89                 for (i = 0; i < __arraycount(ctx->uc_mcontext.__gregs); i++)
  90                         printf("uc_mcontext.greg[%d] 0x%lx\n", i,
  91                             (long)ctx->uc_mcontext.__gregs[i]);
  92         }
  93 }
  94
  95 static void
  96 sigalrm_action(int signo, siginfo_t *info, void *ptr)
  97 {
  98
  99         sig_debug(signo, info, (ucontext_t *)ptr);
 100
 101         ATF_REQUIRE_EQ(info->si_signo, SIGALRM);
 102         ATF_REQUIRE_EQ(info->si_code, SI_TIMER);
 103         ATF_REQUIRE_EQ(info->si_value.sival_int, ITIMER_REAL);
 104
 105         atf_tc_pass();
 106         /* NOTREACHED */
 107 }
 108
 109 ATF_TC(sigalarm);
 110
 111 ATF_TC_HEAD(sigalarm, tc)
 112 {
 113
 114         atf_tc_set_md_var(tc, "descr",
 115             "Checks that signal trampoline correctly calls SIGALRM handler");
 116 }
 117
 118 ATF_TC_BODY(sigalarm, tc)
 119 {
 120         struct sigaction sa;
 121         sa.sa_flags = SA_SIGINFO;
 122         sa.sa_sigaction = sigalrm_action;
 123         sigemptyset(&sa.sa_mask);
 124         sigaction(SIGALRM, &sa, NULL);
 125         for (;;) {
 126                 alarm(1);
 127                 sleep(1);
 128         }
 129         atf_tc_fail("SIGALRM handler wasn't called");
 130 }
 131
 132 static void
 133 sigchild_action(int signo, siginfo_t *info, void *ptr)
 134 {
 135         if (info != NULL) {
 136                 printf("info=%p\n", info);
 137                 printf("ptr=%p\n", ptr);
 138                 printf("si_signo=%d\n", info->si_signo);
 139                 printf("si_errno=%d\n", info->si_errno);
 140                 printf("si_code=%d\n", info->si_code);
 141                 printf("si_uid=%d\n", info->si_uid);
 142                 printf("si_pid=%d\n", info->si_pid);
 143                 printf("si_status=%d\n", info->si_status);
 144                 printf("si_utime=%lu\n", (unsigned long int)info->si_utime);
 145                 printf("si_stime=%lu\n", (unsigned long int)info->si_stime);
 146         }
 147         ATF_REQUIRE_EQ(info->si_code, code);
 148         ATF_REQUIRE_EQ(info->si_signo, SIGCHLD);
 149         ATF_REQUIRE_EQ(info->si_uid, getuid());
 150         ATF_REQUIRE_EQ(info->si_pid, child);
 151         if (WIFEXITED(info->si_status))
 152                 ATF_REQUIRE_EQ(WEXITSTATUS(info->si_status), status);
 153         else if (WIFSTOPPED(info->si_status))
 154                 ATF_REQUIRE_EQ(WSTOPSIG(info->si_status), status);
 155         else if (WIFSIGNALED(info->si_status))
 156                 ATF_REQUIRE_EQ(WTERMSIG(info->si_status), status);
 157 }
 158
 159 static void
 160 setchildhandler(void (*action)(int, siginfo_t *, void *))
 161 {
 162         struct sigaction sa;
 163         sa.sa_flags = SA_SIGINFO;
 164         sa.sa_sigaction = action;
 165         sigemptyset(&sa.sa_mask);
 166         sigaction(SIGCHLD, &sa, NULL);
 167 }
 168
 169 static void
 170 sigchild_setup(void)
 171 {
 172         sigset_t set;
 173         struct rlimit rlim;
 174
 175         (void)getrlimit(RLIMIT_CORE, &rlim);
 176         rlim.rlim_cur = rlim.rlim_max;
 177         (void)setrlimit(RLIMIT_CORE, &rlim);
 178
 179         setchildhandler(sigchild_action);
 180         sigemptyset(&set);
 181         sigaddset(&set, SIGCHLD);
 182         sigprocmask(SIG_BLOCK, &set, NULL);
 183 }
 184
 185 ATF_TC(sigchild_normal);
 186 ATF_TC_HEAD(sigchild_normal, tc)
 187 {
 188
 189         atf_tc_set_md_var(tc, "descr",
 190             "Checks that signal trampoline correctly calls SIGCHLD handler "
 191             "when child exits normally");
 192 }
 193
 194 ATF_TC_BODY(sigchild_normal, tc)
 195 {
 196         sigset_t set;
 197
 198         sigchild_setup();
 199
 200         status = 25;
 201         code = CLD_EXITED;
 202
 203         switch ((child = fork())) {
 204         case 0:
 205                 sleep(1);
 206                 exit(status);
 207         case -1:
 208                 atf_tc_fail("fork failed");
 209         default:
 210                 sigemptyset(&set);
 211                 sigsuspend(&set);
 212         }
 213 }
 214
 215 ATF_TC(sigchild_dump);
 216 ATF_TC_HEAD(sigchild_dump, tc)
 217 {
 218
 219         atf_tc_set_md_var(tc, "descr",
 220             "Checks that signal trampoline correctly calls SIGCHLD handler "
 221             "when child segfaults");
 222 }
 223
 224 ATF_TC_BODY(sigchild_dump, tc)
 225 {
 226         sigset_t set;
 227
 228         sigchild_setup();
 229
 230         status = SIGSEGV;
 231         code = CLD_DUMPED;
 232
 233         switch ((child = fork())) {
 234         case 0:
 235                 sleep(1);
 236                 *(volatile long *)0 = 0;
 237                 atf_tc_fail("Child did not segfault");
 238                 /* NOTREACHED */
 239         case -1:
 240                 atf_tc_fail("fork failed");
 241         default:
 242                 sigemptyset(&set);
 243                 sigsuspend(&set);
 244         }
 245 }
 246
 247 ATF_TC(sigchild_kill);
 248 ATF_TC_HEAD(sigchild_kill, tc)
 249 {
 250
 251         atf_tc_set_md_var(tc, "descr",
 252             "Checks that signal trampoline correctly calls SIGCHLD handler "
 253             "when child is killed");
 254 }
 255
 256 ATF_TC_BODY(sigchild_kill, tc)
 257 {
 258         sigset_t set;
 259
 260         sigchild_setup();
 261
 262         status = SIGPIPE;
 263         code = CLD_KILLED;
 264
 265         switch ((child = fork())) {
 266         case 0:
 267                 sigemptyset(&set);
 268                 sigsuspend(&set);
 269                 break;
 270         case -1:
 271                 atf_tc_fail("fork failed");
 272         default:
 273                 kill(child, SIGPIPE);
 274                 sigemptyset(&set);
 275                 sigsuspend(&set);
 276         }
 277 }
 278
 279 static sigjmp_buf sigfpe_flt_env;
 280 static void
 281 sigfpe_flt_action(int signo, siginfo_t *info, void *ptr)
 282 {
 283
 284         sig_debug(signo, info, (ucontext_t *)ptr);
 285
 286         if (fltdiv_signalled++ != 0)
 287                 atf_tc_fail("FPE handler called more than once");
 288
 289         ATF_REQUIRE_EQ(info->si_signo, SIGFPE);
 290         ATF_REQUIRE_EQ(info->si_code, FPE_FLTDIV);
 291         ATF_REQUIRE_EQ(info->si_errno, 0);
 292
 293         siglongjmp(sigfpe_flt_env, 1);
 294 }
 295
 296 ATF_TC(sigfpe_flt);
 297 ATF_TC_HEAD(sigfpe_flt, tc)
 298 {
 299
 300         atf_tc_set_md_var(tc, "descr",
 301             "Checks that signal trampoline correctly calls SIGFPE handler "
 302             "for floating div-by-zero");
 303 }
 304
 305 ATF_TC_BODY(sigfpe_flt, tc)
 306 {
 307         struct sigaction sa;
 308         double d = strtod("0", NULL);
 309
 310         if (isQEMU())
 311                 atf_tc_skip("Test does not run correctly under QEMU");
 312 #if defined(__powerpc__)
 313         atf_tc_skip("Test not valid on powerpc");
 314 #elif defined(__arm__) && !__SOFTFP__
 315         /*
 316          * Some NEON fpus do not implement IEEE exception handling,
 317          * skip these tests if running on them and compiled for
 318          * hard float.
 319          */
 320         if (0 == fpsetmask(fpsetmask(FP_X_INV)))
 321                 atf_tc_skip("FPU does not implement exception handling");
 322 #endif
 323         if (sigsetjmp(sigfpe_flt_env, 0) == 0) {
 324                 sa.sa_flags = SA_SIGINFO;
 325                 sa.sa_sigaction = sigfpe_flt_action;
 326                 sigemptyset(&sa.sa_mask);
 327                 sigaction(SIGFPE, &sa, NULL);
 328 #ifdef HAVE_FENV
 329                 feenableexcept(FE_ALL_EXCEPT);
 330 #elif defined(_FLOAT_IEEE754)
 331                 fpsetmask(FP_X_INV|FP_X_DZ|FP_X_OFL|FP_X_UFL|FP_X_IMP);
 332 #endif
 333                 printf("%g\n", 1 / d);
 334         }
 335         if (fltdiv_signalled == 0)
 336                 atf_tc_fail("FPE signal handler was not invoked");
 337 }
 338
 339 static sigjmp_buf sigfpe_int_env;
 340 static void
 341 sigfpe_int_action(int signo, siginfo_t *info, void *ptr)
 342 {
 343
 344         sig_debug(signo, info, (ucontext_t *)ptr);
 345
 346         if (intdiv_signalled++ != 0)
 347                 atf_tc_fail("INTDIV handler called more than once");
 348
 349         ATF_REQUIRE_EQ(info->si_signo, SIGFPE);
 350         ATF_REQUIRE_EQ(info->si_code, FPE_INTDIV);
 351         atf_tc_expect_pass();
 352         ATF_REQUIRE_EQ(info->si_errno, 0);
 353
 354         siglongjmp(sigfpe_int_env, 1);
 355 }
 356
 357 ATF_TC(sigfpe_int);
 358 ATF_TC_HEAD(sigfpe_int, tc)
 359 {
 360
 361         atf_tc_set_md_var(tc, "descr",
 362             "Checks that signal trampoline correctly calls SIGFPE handler "
 363             "for integer div-by-zero (PR port-i386/43655)");
 364 }
 365
 366 ATF_TC_BODY(sigfpe_int, tc)
 367 {
 368         struct sigaction sa;
 369         long l = strtol("0", NULL, 10);
 370
 371 #if defined(__powerpc__)
 372         atf_tc_skip("Test not valid on powerpc");
 373 #endif
 374         if (sigsetjmp(sigfpe_int_env, 0) == 0) {
 375                 sa.sa_flags = SA_SIGINFO;
 376                 sa.sa_sigaction = sigfpe_int_action;
 377                 sigemptyset(&sa.sa_mask);
 378                 sigaction(SIGFPE, &sa, NULL);
 379 #ifdef HAVE_FENV
 380                 feenableexcept(FE_ALL_EXCEPT);
 381 #elif defined(_FLOAT_IEEE754)
 382                 fpsetmask(FP_X_INV|FP_X_DZ|FP_X_OFL|FP_X_UFL|FP_X_IMP);
 383 #endif
 384                 printf("%ld\n", 1 / l);
 385         }
 386         if (intdiv_signalled == 0)
 387                 atf_tc_fail("FPE signal handler was not invoked");
 388 }
 389
 390 static void
 391 sigsegv_action(int signo, siginfo_t *info, void *ptr)
 392 {
 393
 394         sig_debug(signo, info, (ucontext_t *)ptr);
 395
 396         ATF_REQUIRE_EQ(info->si_signo, SIGSEGV);
 397         ATF_REQUIRE_EQ(info->si_errno, 0);
 398         ATF_REQUIRE_EQ(info->si_code, SEGV_MAPERR);
 399         ATF_REQUIRE_EQ(info->si_addr, (void *)0);
 400
 401         atf_tc_pass();
 402         /* NOTREACHED */
 403 }
 404
 405 ATF_TC(sigsegv);
 406 ATF_TC_HEAD(sigsegv, tc)
 407 {
 408
 409         atf_tc_set_md_var(tc, "descr",
 410             "Checks that signal trampoline correctly calls SIGSEGV handler");
 411 }
 412
 413 ATF_TC_BODY(sigsegv, tc)
 414 {
 415         struct sigaction sa;
 416
 417         sa.sa_flags = SA_SIGINFO;
 418         sa.sa_sigaction = sigsegv_action;
 419         sigemptyset(&sa.sa_mask);
 420         sigaction(SIGSEGV, &sa, NULL);
 421
 422         *(volatile long *)0 = 0;
 423         atf_tc_fail("Test did not fault as expected");
 424 }
 425
 426 static void
 427 sigbus_action(int signo, siginfo_t *info, void *ptr)
 428 {
 429
 430         printf("si_addr = %p\n", info->si_addr);
 431         sig_debug(signo, info, (ucontext_t *)ptr);
 432
 433         ATF_REQUIRE_EQ(info->si_signo, SIGBUS);
 434         ATF_REQUIRE_EQ(info->si_errno, 0);
 435         ATF_REQUIRE_EQ(info->si_code, BUS_ADRALN);
 436
 437 #if defined(__i386__) || defined(__x86_64__)
 438         atf_tc_expect_fail("x86 architecture does not correctly "
 439             "report the address where the unaligned access occured");
 440 #endif
 441         ATF_REQUIRE_EQ(info->si_addr, (volatile void *)addr);
 442
 443         atf_tc_pass();
 444         /* NOTREACHED */
 445 }
 446
 447 ATF_TC(sigbus_adraln);
 448 ATF_TC_HEAD(sigbus_adraln, tc)
 449 {
 450
 451         atf_tc_set_md_var(tc, "descr",
 452             "Checks that signal trampoline correctly calls SIGBUS handler "
 453             "for invalid address alignment");
 454 }
 455
 456 ATF_TC_BODY(sigbus_adraln, tc)
 457 {
 458         struct sigaction sa;
 459
 460 #if defined(__alpha__) || defined(__arm__)
 461         int rv, val;
 462         size_t len = sizeof(val);
 463         rv = sysctlbyname("machdep.unaligned_sigbus", &val, &len, NULL, 0);
 464         ATF_REQUIRE(rv == 0);
 465         if (val == 0)
 466                 atf_tc_skip("No SIGBUS signal for unaligned accesses");
 467 #endif
 468
 469         /* m68k (except sun2) never issue SIGBUS (PR lib/49653) */
 470         if (strcmp(MACHINE_ARCH, "m68k") == 0)
 471                 atf_tc_skip("No SIGBUS signal for unaligned accesses");
 472
 473         sa.sa_flags = SA_SIGINFO;
 474         sa.sa_sigaction = sigbus_action;
 475         sigemptyset(&sa.sa_mask);
 476         sigaction(SIGBUS, &sa, NULL);
 477
 478         /* Enable alignment checks for x86. 0x40000 is PSL_AC. */
 479 #if defined(__i386__)
 480         __asm__("pushf; orl $0x40000, (%esp); popf");
 481 #elif defined(__amd64__)
 482         __asm__("pushf; orl $0x40000, (%rsp); popf");
 483 #endif
 484
 485         addr = calloc(2, sizeof(int));
 486         ATF_REQUIRE(addr != NULL);
 487
 488         if (isQEMU())
 489                 atf_tc_expect_fail("QEMU fails to trap unaligned accesses");
 490
 491         /* Force an unaligned access */
 492         addr++;
 493         printf("now trying to access unaligned address %p\n", addr);
 494         ATF_REQUIRE_EQ(*(volatile int *)addr, 0);
 495
 496         atf_tc_fail("Test did not fault as expected");
 497 }
 498
 499 ATF_TP_ADD_TCS(tp)
 500 {
 501
 502         ATF_TP_ADD_TC(tp, sigalarm);
 503         ATF_TP_ADD_TC(tp, sigchild_normal);
 504         ATF_TP_ADD_TC(tp, sigchild_dump);
 505         ATF_TP_ADD_TC(tp, sigchild_kill);
 506         ATF_TP_ADD_TC(tp, sigfpe_flt);
 507         ATF_TP_ADD_TC(tp, sigfpe_int);
 508         ATF_TP_ADD_TC(tp, sigsegv);
 509         ATF_TP_ADD_TC(tp, sigbus_adraln);
 510
 511         return atf_no_error();
 512 }