Date: Mon, 10 Dec 2012 19:33:40 +0000 (UTC) From: "George V. Neville-Neil" <gnn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r244093 - in stable/9/sys: cddl/dev/dtrace/amd64 cddl/dev/dtrace/i386 kern Message-ID: <201212101933.qBAJXehD095898@svn.freebsd.org>
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Author: gnn Date: Mon Dec 10 19:33:39 2012 New Revision: 244093 URL: http://svnweb.freebsd.org/changeset/base/244093 Log: MFC: 238537,238552 Add support for walltimestamp in DTrace. Submitted by: Fabian Keil Includes correction by: avg Modified: stable/9/sys/cddl/dev/dtrace/amd64/dtrace_subr.c stable/9/sys/cddl/dev/dtrace/i386/dtrace_subr.c stable/9/sys/kern/kern_tc.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/cddl/dev/dtrace/amd64/dtrace_subr.c ============================================================================== --- stable/9/sys/cddl/dev/dtrace/amd64/dtrace_subr.c Mon Dec 10 17:56:51 2012 (r244092) +++ stable/9/sys/cddl/dev/dtrace/amd64/dtrace_subr.c Mon Dec 10 19:33:39 2012 (r244093) @@ -43,6 +43,8 @@ extern uintptr_t dtrace_in_probe_addr; extern int dtrace_in_probe; +extern void dtrace_getnanotime(struct timespec *tsp); + int dtrace_invop(uintptr_t, uintptr_t *, uintptr_t); typedef struct dtrace_invop_hdlr { @@ -456,8 +458,11 @@ dtrace_gethrtime() uint64_t dtrace_gethrestime(void) { - printf("%s(%d): XXX\n",__func__,__LINE__); - return (0); + struct timespec current_time; + + dtrace_getnanotime(¤t_time); + + return (current_time.tv_sec * 1000000000ULL + current_time.tv_nsec); } /* Function to handle DTrace traps during probes. See amd64/amd64/trap.c */ Modified: stable/9/sys/cddl/dev/dtrace/i386/dtrace_subr.c ============================================================================== --- stable/9/sys/cddl/dev/dtrace/i386/dtrace_subr.c Mon Dec 10 17:56:51 2012 (r244092) +++ stable/9/sys/cddl/dev/dtrace/i386/dtrace_subr.c Mon Dec 10 19:33:39 2012 (r244093) @@ -45,6 +45,8 @@ extern uintptr_t kernelbase; extern uintptr_t dtrace_in_probe_addr; extern int dtrace_in_probe; +extern void dtrace_getnanotime(struct timespec *tsp); + int dtrace_invop(uintptr_t, uintptr_t *, uintptr_t); typedef struct dtrace_invop_hdlr { @@ -457,8 +459,11 @@ dtrace_gethrtime() uint64_t dtrace_gethrestime(void) { - printf("%s(%d): XXX\n",__func__,__LINE__); - return (0); + struct timespec current_time; + + dtrace_getnanotime(¤t_time); + + return (current_time.tv_sec * 1000000000ULL + current_time.tv_nsec); } /* Function to handle DTrace traps during probes. See i386/i386/trap.c */ Modified: stable/9/sys/kern/kern_tc.c ============================================================================== --- stable/9/sys/kern/kern_tc.c Mon Dec 10 17:56:51 2012 (r244092) +++ stable/9/sys/kern/kern_tc.c Mon Dec 10 19:33:39 2012 (r244093) @@ -110,6 +110,8 @@ SYSCTL_INT(_kern_timecounter, OID_AUTO, static void tc_windup(void); static void cpu_tick_calibrate(int); +void dtrace_getnanotime(struct timespec *tsp); + static int sysctl_kern_boottime(SYSCTL_HANDLER_ARGS) { @@ -303,6 +305,24 @@ getmicrotime(struct timeval *tvp) } /* + * This is a clone of getnanotime and used for walltimestamps. + * The dtrace_ prefix prevents fbt from creating probes for + * it so walltimestamp can be safely used in all fbt probes. + */ +void +dtrace_getnanotime(struct timespec *tsp) +{ + struct timehands *th; + u_int gen; + + do { + th = timehands; + gen = th->th_generation; + *tsp = th->th_nanotime; + } while (gen == 0 || gen != th->th_generation); +} + +/* * Initialize a new timecounter and possibly use it. */ void
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