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| author | jkoshy <jkoshy@FreeBSD.org> | 2008-12-13 13:07:12 +0000 |
|---|---|---|
| committer | jkoshy <jkoshy@FreeBSD.org> | 2008-12-13 13:07:12 +0000 |
| commit | 57939c399f73afce189b6e3f815acf369c90e8f2 (patch) | |
| tree | 83dc6754204d60ec20d93f42fd864d37290d194f /sys/kern/subr_trap.c | |
| parent | eea87ca93f64298bf448aef14d2833d79246936e (diff) | |
| download | FreeBSD-src-57939c399f73afce189b6e3f815acf369c90e8f2.zip FreeBSD-src-57939c399f73afce189b6e3f815acf369c90e8f2.tar.gz | |
- Bug fix: prevent a thread from migrating between CPUs between the
time it is marked for user space callchain capture in the NMI
handler and the time the callchain capture callback runs.
- Improve code and control flow clarity by invoking hwpmc(4)'s user
space callchain capture callback directly from low-level code.
Reviewed by: jhb (kern/subr_trap.c)
Testing (various patch revisions): gnn,
Fabien Thomas <fabien dot thomas at netasq dot com>,
Artem Belevich <artemb at gmail dot com>
Diffstat (limited to 'sys/kern/subr_trap.c')
| -rw-r--r-- | sys/kern/subr_trap.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c index e7e8120..ba54524 100644 --- a/sys/kern/subr_trap.c +++ b/sys/kern/subr_trap.c @@ -44,7 +44,6 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); -#include "opt_hwpmc_hooks.h" #include "opt_ktrace.h" #include "opt_mac.h" #ifdef __i386__ @@ -179,13 +178,6 @@ ast(struct trapframe *framep) td->td_profil_ticks = 0; td->td_pflags &= ~TDP_OWEUPC; } -#if defined(HWPMC_HOOKS) - if (td->td_pflags & TDP_CALLCHAIN) { - PMC_CALL_HOOK_UNLOCKED(td, PMC_FN_USER_CALLCHAIN, - (void *) framep); - td->td_pflags &= ~TDP_CALLCHAIN; - } -#endif if (flags & TDF_ALRMPEND) { PROC_LOCK(p); psignal(p, SIGVTALRM); |
