Module Name: src Committed By: kamil Date: Mon Nov 28 21:37:00 UTC 2016
Modified Files: src/tests/kernel: t_ptrace_wait.c Log Message: Add new test step1 in t_prace_wait{,3,4,6,id,pid} under PT_STEP guards step1: Verify single PT_STEP call. This function is calculating happy numbers just to consume CPU cycles for the test purpose. PT_STEP raises SIGTRAP to by caught by a debugger. Sponsored by <The NetBSD Foundation> To generate a diff of this commit: cvs rdiff -u -r1.32 -r1.33 src/tests/kernel/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/kernel/t_ptrace_wait.c diff -u src/tests/kernel/t_ptrace_wait.c:1.32 src/tests/kernel/t_ptrace_wait.c:1.33 --- src/tests/kernel/t_ptrace_wait.c:1.32 Sat Nov 26 02:34:49 2016 +++ src/tests/kernel/t_ptrace_wait.c Mon Nov 28 21:37:00 2016 @@ -1,4 +1,4 @@ -/* $NetBSD: t_ptrace_wait.c,v 1.32 2016/11/26 02:34:49 kamil Exp $ */ +/* $NetBSD: t_ptrace_wait.c,v 1.33 2016/11/28 21:37:00 kamil Exp $ */ /*- * Copyright (c) 2016 The NetBSD Foundation, Inc. @@ -27,7 +27,7 @@ */ #include <sys/cdefs.h> -__RCSID("$NetBSD: t_ptrace_wait.c,v 1.32 2016/11/26 02:34:49 kamil Exp $"); +__RCSID("$NetBSD: t_ptrace_wait.c,v 1.33 2016/11/28 21:37:00 kamil Exp $"); #include <sys/param.h> #include <sys/types.h> @@ -363,6 +363,40 @@ await_zombie(pid_t process) } #endif +/* Happy number sequence -- this function is used to just consume cpu cycles */ +#define HAPPY_NUMBER 1 + +/* If n is not happy then its sequence ends in the cycle: + * 4, 16, 37, 58, 89, 145, 42, 20, 4, ... */ +#define SAD_NUMBER 4 + +/* Calculate the sum of the squares of the digits of n */ +static unsigned __used +dsum(unsigned n) +{ + unsigned sum, x; + for (sum = 0; n; n /= 10) { + x = n % 10; + sum += x * x; + } + return sum; +} + +static int __used +check_happy(unsigned n) +{ + for (;;) { + unsigned total = dsum(n); + + if (total == HAPPY_NUMBER) + return 1; + if (total == SAD_NUMBER) + return 0; + + n = total; + } +} + ATF_TC(traceme1); ATF_TC_HEAD(traceme1, tc) { @@ -4455,6 +4489,70 @@ ATF_TC_BODY(fpregs2, tc) } #endif +#if defined(PT_STEP) +ATF_TC(step1); +ATF_TC_HEAD(step1, tc) +{ + atf_tc_set_md_var(tc, "descr", + "Verify single PT_STEP call"); +} + +ATF_TC_BODY(step1, tc) +{ + const int exitval = 5; + const int sigval = SIGSTOP; + pid_t child, wpid; +#if defined(TWAIT_HAVE_STATUS) + int status; +#endif + int happy; + + printf("Before forking process PID=%d\n", getpid()); + child = atf_utils_fork(); + if (child == 0) { + printf("Before calling PT_TRACE_ME from child %d\n", getpid()); + FORKEE_ASSERT(ptrace(PT_TRACE_ME, 0, NULL, 0) != -1); + + happy = check_happy(100); + + printf("Before raising %s from child\n", strsignal(sigval)); + FORKEE_ASSERT(raise(sigval) == 0); + + FORKEE_ASSERT_EQ(happy, check_happy(100)); + + printf("Before exiting of the child process\n"); + _exit(exitval); + } + printf("Parent process PID=%d, child's PID=%d\n", getpid(), child); + + printf("Before calling %s() for the child\n", TWAIT_FNAME); + TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); + + validate_status_stopped(status, sigval); + + printf("Before resuming the child process where it left off and " + "without signal to be sent (use PT_STEP)\n"); + ATF_REQUIRE(ptrace(PT_STEP, child, (void *)1, 0) != -1); + + printf("Before calling %s() for the child\n", TWAIT_FNAME); + TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); + + validate_status_stopped(status, SIGTRAP); + + printf("Before resuming the child process where it left off and " + "without signal to be sent\n"); + ATF_REQUIRE(ptrace(PT_CONTINUE, child, (void *)1, 0) != -1); + + printf("Before calling %s() for the child\n", TWAIT_FNAME); + TWAIT_REQUIRE_SUCCESS(wpid = TWAIT_GENERIC(child, &status, 0), child); + + validate_status_exited(status, exitval); + + printf("Before calling %s() for the child\n", TWAIT_FNAME); + TWAIT_REQUIRE_FAILURE(ECHILD, wpid = TWAIT_GENERIC(child, &status, 0)); +} +#endif + #if defined(TWAIT_HAVE_PID) #define ATF_TP_ADD_TC_HAVE_PID(a,b) ATF_TP_ADD_TC(a,b) #else @@ -4473,6 +4571,12 @@ ATF_TC_BODY(fpregs2, tc) #define ATF_TP_ADD_TC_HAVE_FPREGS(a,b) #endif +#if defined(PT_STEP) +#define ATF_TP_ADD_TC_PT_STEP(a,b) ATF_TP_ADD_TC(a,b) +#else +#define ATF_TP_ADD_TC_PT_STEP(a,b) +#endif + ATF_TP_ADD_TCS(tp) { setvbuf(stdout, NULL, _IONBF, 0); @@ -4544,5 +4648,7 @@ ATF_TP_ADD_TCS(tp) ATF_TP_ADD_TC_HAVE_FPREGS(tp, fpregs1); ATF_TP_ADD_TC_HAVE_FPREGS(tp, fpregs2); + ATF_TP_ADD_TC_PT_STEP(tp, step1); + return atf_no_error(); }