Module Name: src Committed By: kamil Date: Wed Feb 5 23:43:18 UTC 2020
Modified Files: src/tests/lib/libc/sys: t_ptrace_wait.c Log Message: Refactor signal9 and signal10 tests in t_ptrace_wait* Remove signal9 and signal10. Reimplement the idea of these test in new trace_thread_lwpexit_masked_sigtrap, trace_thread_lwpcreate_masked_sigtrap and trace_thread_lwpcreate_and_exit_masked_sigtrap. This removes 2 tests directly using low-level lwp APIs. To generate a diff of this commit: cvs rdiff -u -r1.152 -r1.153 src/tests/lib/libc/sys/t_ptrace_wait.c Please note that diffs are not public domain; they are subject to the copyright notices on the relevant files.
Modified files: Index: src/tests/lib/libc/sys/t_ptrace_wait.c diff -u src/tests/lib/libc/sys/t_ptrace_wait.c:1.152 src/tests/lib/libc/sys/t_ptrace_wait.c:1.153 --- src/tests/lib/libc/sys/t_ptrace_wait.c:1.152 Tue Feb 4 21:34:47 2020 +++ src/tests/lib/libc/sys/t_ptrace_wait.c Wed Feb 5 23:43:18 2020 @@ -1,4 +1,4 @@ -/* $NetBSD: t_ptrace_wait.c,v 1.152 2020/02/04 21:34:47 kamil Exp $ */ +/* $NetBSD: t_ptrace_wait.c,v 1.153 2020/02/05 23:43:18 kamil Exp $ */ /*- * Copyright (c) 2016, 2017, 2018, 2019 The NetBSD Foundation, Inc. @@ -27,7 +27,7 @@ */ #include <sys/cdefs.h> -__RCSID("$NetBSD: t_ptrace_wait.c,v 1.152 2020/02/04 21:34:47 kamil Exp $"); +__RCSID("$NetBSD: t_ptrace_wait.c,v 1.153 2020/02/05 23:43:18 kamil Exp $"); #define __LEGACY_PT_LWPINFO @@ -6395,7 +6395,7 @@ trace_threads_cb(void *arg __unused) } static void -trace_threads(bool trace_create, bool trace_exit) +trace_threads(bool trace_create, bool trace_exit, bool masked) { const int sigval = SIGSTOP; pid_t child, wpid; @@ -6408,6 +6408,8 @@ trace_threads(bool trace_create, bool tr const int elen = sizeof(event); struct ptrace_siginfo info; + sigset_t intmask; + pthread_t t[TRACE_THREADS_NUM]; int rv; size_t n; @@ -6422,6 +6424,12 @@ trace_threads(bool trace_create, bool tr DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid()); FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); + if (masked) { + sigemptyset(&intmask); + sigaddset(&intmask, SIGTRAP); + sigprocmask(SIG_BLOCK, &intmask, NULL); + } + DPRINTF("Before raising %s from child\n", strsignal(sigval)); FORKEE_ASSERT(raise(sigval) == 0); @@ -6570,7 +6578,7 @@ trace_threads(bool trace_create, bool tr TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0)); } -#define TRACE_THREADS(test, trace_create, trace_exit) \ +#define TRACE_THREADS(test, trace_create, trace_exit, mask) \ ATF_TC(test); \ ATF_TC_HEAD(test, tc) \ { \ @@ -6583,13 +6591,17 @@ ATF_TC_HEAD(test, tc) \ ATF_TC_BODY(test, tc) \ { \ \ - trace_threads(trace_create, trace_exit); \ + trace_threads(trace_create, trace_exit, mask); \ } -TRACE_THREADS(trace_thread_nolwpevents, false, false) -TRACE_THREADS(trace_thread_lwpexit, false, true) -TRACE_THREADS(trace_thread_lwpcreate, true, false) -TRACE_THREADS(trace_thread_lwpcreate_and_exit, true, true) +TRACE_THREADS(trace_thread_nolwpevents, false, false, false) +TRACE_THREADS(trace_thread_lwpexit, false, true, false) +TRACE_THREADS(trace_thread_lwpcreate, true, false, false) +TRACE_THREADS(trace_thread_lwpcreate_and_exit, true, true, false) + +TRACE_THREADS(trace_thread_lwpexit_masked_sigtrap, false, true, true) +TRACE_THREADS(trace_thread_lwpcreate_masked_sigtrap, true, false, true) +TRACE_THREADS(trace_thread_lwpcreate_and_exit_masked_sigtrap, true, true, true) /// ---------------------------------------------------------------------------- @@ -7240,217 +7252,6 @@ ATF_TC_BODY(threads_and_exec, tc) volatile lwpid_t the_lwp_id = 0; static void -lwp_main_func(void *arg) -{ - the_lwp_id = _lwp_self(); - _lwp_exit(); -} - -ATF_TC(signal9); -ATF_TC_HEAD(signal9, tc) -{ - atf_tc_set_md_var(tc, "descr", - "Verify that masking SIGTRAP in tracee does not stop tracer from " - "catching PTRACE_LWP_CREATE breakpoint"); -} - -ATF_TC_BODY(signal9, tc) -{ - const int exitval = 5; - const int sigval = SIGSTOP; - const int sigmasked = SIGTRAP; - pid_t child, wpid; -#if defined(TWAIT_HAVE_STATUS) - int status; -#endif - sigset_t intmask; - ptrace_state_t state; - const int slen = sizeof(state); - ptrace_event_t event; - const int elen = sizeof(event); - ucontext_t uc; - lwpid_t lid; - static const size_t ssize = 16*1024; - void *stack; - - DPRINTF("Before forking process PID=%d\n", getpid()); - SYSCALL_REQUIRE((child = fork()) != -1); - if (child == 0) { - DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid()); - FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); - - sigemptyset(&intmask); - sigaddset(&intmask, sigmasked); - sigprocmask(SIG_BLOCK, &intmask, NULL); - - DPRINTF("Before raising %s from child\n", strsignal(sigval)); - FORKEE_ASSERT(raise(sigval) == 0); - - DPRINTF("Before allocating memory for stack in child\n"); - FORKEE_ASSERT((stack = malloc(ssize)) != NULL); - - DPRINTF("Before making context for new lwp in child\n"); - _lwp_makecontext(&uc, lwp_main_func, NULL, NULL, stack, ssize); - - DPRINTF("Before creating new in child\n"); - FORKEE_ASSERT(_lwp_create(&uc, 0, &lid) == 0); - - DPRINTF("Before waiting for lwp %d to exit\n", lid); - FORKEE_ASSERT(_lwp_wait(lid, NULL) == 0); - - DPRINTF("Before verifying that reported %d and running lid %d " - "are the same\n", lid, the_lwp_id); - FORKEE_ASSERT_EQ(lid, the_lwp_id); - - DPRINTF("Before exiting of the child process\n"); - _exit(exitval); - } - DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child); - - DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); - TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); - - validate_status_stopped(status, sigval); - - DPRINTF("Set empty EVENT_MASK for the child %d\n", child); - event.pe_set_event = PTRACE_LWP_CREATE; - SYSCALL_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &event, elen) != -1); - - DPRINTF("Before resuming the child process where it left off and " - "without signal to be sent\n"); - SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); - - DPRINTF("Before calling %s() for the child - expected stopped " - "SIGTRAP\n", TWAIT_FNAME); - TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); - - validate_status_stopped(status, sigmasked); - - SYSCALL_REQUIRE(ptrace(PT_GET_PROCESS_STATE, child, &state, slen) != -1); - - ATF_REQUIRE_EQ(state.pe_report_event, PTRACE_LWP_CREATE); - - lid = state.pe_lwp; - DPRINTF("Reported PTRACE_LWP_CREATE event with lid %d\n", lid); - - DPRINTF("Before resuming the child process where it left off and " - "without signal to be sent\n"); - SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); - - DPRINTF("Before calling %s() for the child - expected exited\n", - TWAIT_FNAME); - TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); - - validate_status_exited(status, exitval); - - DPRINTF("Before calling %s() for the child - expected no process\n", - TWAIT_FNAME); - TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0)); -} - -ATF_TC(signal10); -ATF_TC_HEAD(signal10, tc) -{ - atf_tc_set_md_var(tc, "descr", - "Verify that masking SIGTRAP in tracee does not stop tracer from " - "catching PTRACE_LWP_EXIT breakpoint"); -} - -ATF_TC_BODY(signal10, tc) -{ - const int exitval = 5; - const int sigval = SIGSTOP; - const int sigmasked = SIGTRAP; - pid_t child, wpid; -#if defined(TWAIT_HAVE_STATUS) - int status; -#endif - sigset_t intmask; - ptrace_state_t state; - const int slen = sizeof(state); - ptrace_event_t event; - const int elen = sizeof(event); - ucontext_t uc; - lwpid_t lid; - static const size_t ssize = 16*1024; - void *stack; - - DPRINTF("Before forking process PID=%d\n", getpid()); - SYSCALL_REQUIRE((child = fork()) != -1); - if (child == 0) { - DPRINTF("Before calling PT_TRACE_ME from child %d\n", getpid()); - FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); - - sigemptyset(&intmask); - sigaddset(&intmask, sigmasked); - sigprocmask(SIG_BLOCK, &intmask, NULL); - - DPRINTF("Before raising %s from child\n", strsignal(sigval)); - FORKEE_ASSERT(raise(sigval) == 0); - - DPRINTF("Before allocating memory for stack in child\n"); - FORKEE_ASSERT((stack = malloc(ssize)) != NULL); - - DPRINTF("Before making context for new lwp in child\n"); - _lwp_makecontext(&uc, lwp_main_func, NULL, NULL, stack, ssize); - - DPRINTF("Before creating new in child\n"); - FORKEE_ASSERT(_lwp_create(&uc, 0, &lid) == 0); - - DPRINTF("Before waiting for lwp %d to exit\n", lid); - FORKEE_ASSERT(_lwp_wait(lid, NULL) == 0); - - DPRINTF("Before verifying that reported %d and running lid %d " - "are the same\n", lid, the_lwp_id); - FORKEE_ASSERT_EQ(lid, the_lwp_id); - - DPRINTF("Before exiting of the child process\n"); - _exit(exitval); - } - DPRINTF("Parent process PID=%d, child's PID=%d\n", getpid(), child); - - DPRINTF("Before calling %s() for the child\n", TWAIT_FNAME); - TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); - - validate_status_stopped(status, sigval); - - DPRINTF("Set empty EVENT_MASK for the child %d\n", child); - event.pe_set_event = PTRACE_LWP_EXIT; - SYSCALL_REQUIRE(ptrace(PT_SET_EVENT_MASK, child, &event, elen) != -1); - - DPRINTF("Before resuming the child process where it left off and " - "without signal to be sent\n"); - SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); - - DPRINTF("Before calling %s() for the child - expected stopped " - "SIGTRAP\n", TWAIT_FNAME); - TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); - - validate_status_stopped(status, sigmasked); - - SYSCALL_REQUIRE(ptrace(PT_GET_PROCESS_STATE, child, &state, slen) != -1); - - ATF_REQUIRE_EQ(state.pe_report_event, PTRACE_LWP_EXIT); - - lid = state.pe_lwp; - DPRINTF("Reported PTRACE_LWP_EXIT event with lid %d\n", lid); - - DPRINTF("Before resuming the child process where it left off and " - "without signal to be sent\n"); - SYSCALL_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); - - DPRINTF("Before calling %s() for the child - expected exited\n", - TWAIT_FNAME); - TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); - - validate_status_exited(status, exitval); - - DPRINTF("Before calling %s() for the child - expected no process\n", - TWAIT_FNAME); - TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0)); -} - -static void lwp_main_stop(void *arg) { the_lwp_id = _lwp_self(); @@ -9439,6 +9240,10 @@ ATF_TP_ADD_TCS(tp) ATF_TP_ADD_TC(tp, trace_thread_lwpcreate); ATF_TP_ADD_TC(tp, trace_thread_lwpcreate_and_exit); + ATF_TP_ADD_TC(tp, trace_thread_lwpexit_masked_sigtrap); + ATF_TP_ADD_TC(tp, trace_thread_lwpcreate_masked_sigtrap); + ATF_TP_ADD_TC(tp, trace_thread_lwpcreate_and_exit_masked_sigtrap); + ATF_TP_ADD_TC(tp, signal_mask_unrelated); ATF_TP_ADD_TC_HAVE_PID(tp, posix_spawn_singalmasked); @@ -9452,9 +9257,6 @@ ATF_TP_ADD_TCS(tp) ATF_TP_ADD_TC(tp, threads_and_exec); - ATF_TP_ADD_TC(tp, signal9); - ATF_TP_ADD_TC(tp, signal10); - ATF_TP_ADD_TC(tp, suspend2); ATF_TP_ADD_TC(tp, resume1);