diff options
Diffstat (limited to 'src/third_party/unwind/dist/tests/Gtest-resume-sig.c')
| -rw-r--r-- | src/third_party/unwind/dist/tests/Gtest-resume-sig.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/tests/Gtest-resume-sig.c b/src/third_party/unwind/dist/tests/Gtest-resume-sig.c new file mode 100644 index 00000000000..18ec65da713 --- /dev/null +++ b/src/third_party/unwind/dist/tests/Gtest-resume-sig.c @@ -0,0 +1,200 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2003-2004 Hewlett-Packard Co + Contributed by David Mosberger-Tang <davidm@hpl.hp.com> + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +/* Verify that unw_resume() restores the signal mask at proper time. */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include "compiler.h" + +#include <libunwind.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> + +#ifdef HAVE_IA64INTRIN_H +# include <ia64intrin.h> +#endif + +#define panic(args...) \ + do { fprintf (stderr, args); ++nerrors; } while (0) + +int verbose; +int nerrors; +int got_usr1, got_usr2; +char *sigusr1_sp; + +uintptr_t +get_bsp (void) +{ +#if UNW_TARGET_IA64 +# ifdef __INTEL_COMPILER + return __getReg (_IA64_REG_AR_BSP); +# else + return (uintptr_t) __builtin_ia64_bsp (); +# endif +#else + return 0; +#endif +} + +#ifdef TEST_WITH_SIGINFO +void +handler (int sig, + siginfo_t *si UNUSED, + void *ucontext UNUSED) +#else +void +handler (int sig) +#endif +{ + unw_word_t ip; + sigset_t mask; + unw_context_t uc; + unw_cursor_t c; + char foo; + int ret; + // The test rely on SIGUSR2 mask to be cleared when the handler returns. + // For local context from the signal handler, there doesn't seem to be a way + // currently to set it so just clear the whole struct to make sure the signal mask is cleared. + // This should probably be fixed to avoid signal mask being set to random values + // by `unw_resume` if the context was not pre-zeroed., + // Using the signal ucontext direction should also work automatically but currently doesn't + // on ARM/AArch64 (or any other archs that doesn't have a proper sigreturn implementation) + memset(&uc, 0x0, sizeof(uc)); + +#if UNW_TARGET_IA64 + if (verbose) + printf ("bsp = %llx\n", (unsigned long long) get_bsp ()); +#endif + + if (verbose) + printf ("got signal %d\n", sig); + + if (sig == SIGUSR1) + { + ++got_usr1; + sigusr1_sp = &foo; + + sigemptyset (&mask); + sigaddset (&mask, SIGUSR2); + sigprocmask (SIG_BLOCK, &mask, NULL); + kill (getpid (), SIGUSR2); /* pend SIGUSR2 */ + + signal (SIGUSR1, SIG_IGN); + + if ((ret = unw_getcontext (&uc)) < 0) + panic ("unw_getcontext() failed: ret=%d\n", ret); + if ((ret = unw_init_local (&c, &uc)) < 0) + panic ("unw_init_local() failed: ret=%d\n", ret); + + if ((ret = unw_step (&c)) < 0) /* step to signal trampoline */ + panic ("unw_step(1) failed: ret=%d\n", ret); + + if ((ret = unw_step (&c)) < 0) /* step to kill() */ + panic ("unw_step(2) failed: ret=%d\n", ret); + +#if defined(UNW_TARGET_TILEGX) + if ((ret = unw_step (&c)) < 0) /* step to signal trampoline */ + panic ("unw_step(2) failed: ret=%d\n", ret); +#endif + + if ((ret = unw_get_reg (&c, UNW_REG_IP, &ip)) < 0) + panic ("unw_get_reg(IP) failed: ret=%d\n", ret); + if (verbose) + printf ("resuming at 0x%lx, with SIGUSR2 pending\n", + (unsigned long) ip); + unw_resume (&c); + } + else if (sig == SIGUSR2) + { + ++got_usr2; + if (got_usr1) + { + if (verbose) + printf ("OK: stack still at %p\n", &foo); + } + signal (SIGUSR2, SIG_IGN); + } + else + panic ("Got unexpected signal %d\n", sig); +} + +int +main (int argc, char **argv UNUSED) +{ + struct sigaction sa; + float d = 1.0; + int n = 0; + + if (argc > 1) + verbose = 1; + + memset (&sa, 0, sizeof(sa)); +#ifdef TEST_WITH_SIGINFO + sa.sa_sigaction = handler; + sa.sa_flags = SA_SIGINFO; +#else + sa.sa_handler = handler; +#endif + + if (sigaction (SIGUSR1, &sa, NULL) != 0 || + sigaction (SIGUSR2, &sa, NULL) != 0) + { + fprintf (stderr, "sigaction() failed: %s\n", strerror (errno)); + return -1; + } + + /* Use the FPU a bit; otherwise we get spurious errors should the + signal handler need to use the FPU for any reason. This seems to + happen on x86-64. */ + while (d > 0.0) + { + d /= 2.0; + ++n; + } + if (n > 9999) + return -1; /* can't happen, but don't tell the compiler... */ + + if (verbose) + printf ("sending SIGUSR1\n"); + kill (getpid (), SIGUSR1); + + if (!got_usr2) + panic ("failed to get SIGUSR2\n"); + + if (nerrors) + { + fprintf (stderr, "FAILURE: detected %d errors\n", nerrors); + exit (-1); + } + + if (verbose) + printf ("SUCCESS\n"); + return 0; +} |