Date: Sat, 1 Oct 2016 22:12:34 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r306565 - head/usr.bin/kdump Message-ID: <201610012212.u91MCYDc037283@repo.freebsd.org>
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Author: jhb Date: Sat Oct 1 22:12:33 2016 New Revision: 306565 URL: https://svnweb.freebsd.org/changeset/base/306565 Log: Use timercmp() and timersub() in kdump. Previously, kdump used the kernel-only timervalsub() macro which required defining _KERNEL when including <sys/time.h>. Now, kdump uses the existing userland API. The timercmp() usage to check for a backwards timestamp is also clearer and simpler than the previous code which checked the result of the subtraction for a negative value. While here, take advantage of the 3-arg timersub() to store the subtraction results in a tempory timeval instead of overwriting the timestamp in the ktrace record and then having to restore it. Modified: head/usr.bin/kdump/kdump.c Modified: head/usr.bin/kdump/kdump.c ============================================================================== --- head/usr.bin/kdump/kdump.c Sat Oct 1 22:08:07 2016 (r306564) +++ head/usr.bin/kdump/kdump.c Sat Oct 1 22:12:33 2016 (r306565) @@ -45,9 +45,7 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/capsicum.h> #include <sys/errno.h> -#define _KERNEL #include <sys/time.h> -#undef _KERNEL #include <sys/uio.h> #include <sys/ktrace.h> #include <sys/ioctl.h> @@ -637,27 +635,23 @@ dumpheader(struct ktr_header *kth) if (timestamp & TIMESTAMP_ELAPSED) { if (prevtime_e.tv_sec == 0) prevtime_e = kth->ktr_time; - timevalsub(&kth->ktr_time, &prevtime_e); - printf("%jd.%06ld ", (intmax_t)kth->ktr_time.tv_sec, - kth->ktr_time.tv_usec); - timevaladd(&kth->ktr_time, &prevtime_e); + timersub(&kth->ktr_time, &prevtime_e, &temp); + printf("%jd.%06ld ", (intmax_t)temp.tv_sec, + temp.tv_usec); } if (timestamp & TIMESTAMP_RELATIVE) { if (prevtime.tv_sec == 0) prevtime = kth->ktr_time; - temp = kth->ktr_time; - timevalsub(&kth->ktr_time, &prevtime); - if ((intmax_t)kth->ktr_time.tv_sec < 0) { - kth->ktr_time = prevtime; - prevtime = temp; - timevalsub(&kth->ktr_time, &prevtime); + if (timercmp(&kth->ktr_time, &prevtime, <)) { + timersub(&prevtime, &kth->ktr_time, &temp); sign = "-"; } else { - prevtime = temp; + timersub(&kth->ktr_time, &prevtime, &temp); sign = ""; } - printf("%s%jd.%06ld ", sign, (intmax_t)kth->ktr_time.tv_sec, - kth->ktr_time.tv_usec); + prevtime = kth->ktr_time; + printf("%s%jd.%06ld ", sign, (intmax_t)temp.tv_sec, + temp.tv_usec); } } printf("%s ", type);
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