diff options
| -rw-r--r-- | lib/libpmc/libpmc.c | 9 | ||||
| -rw-r--r-- | lib/libpmc/pmclog.c | 27 |
2 files changed, 29 insertions, 7 deletions
diff --git a/lib/libpmc/libpmc.c b/lib/libpmc/libpmc.c index 57b9c90de256..003d9615a44a 100644 --- a/lib/libpmc/libpmc.c +++ b/lib/libpmc/libpmc.c @@ -35,6 +35,7 @@ __FBSDID("$FreeBSD$"); #include <sys/pmc.h> #include <sys/syscall.h> +#include <assert.h> #include <ctype.h> #include <errno.h> #include <err.h> @@ -1084,8 +1085,14 @@ pmc_allocate(const char *ctrspec, enum pmc_mode mode, r = spec_copy = strdup(ctrspec); ctrname = strsep(&r, ","); if (pmc_pmu_enabled()) { - if (pmc_pmu_pmcallocate(ctrname, &pmc_config) == 0) + if (pmc_pmu_pmcallocate(ctrname, &pmc_config) == 0) { + /* + * XXX: pmclog_get_event exploits this to disambiguate + * PMU from PMC event codes in PMCALLOCATE events. + */ + assert(pmc_config.pm_ev < PMC_EVENT_FIRST); goto found; + } /* Otherwise, reset any changes */ pmc_config.pm_ev = 0; diff --git a/lib/libpmc/pmclog.c b/lib/libpmc/pmclog.c index 0db91cf51bc2..92bcb1c2b161 100644 --- a/lib/libpmc/pmclog.c +++ b/lib/libpmc/pmclog.c @@ -356,12 +356,27 @@ pmclog_get_event(void *cookie, char **data, ssize_t *len, PMCLOG_READ32(le,ev->pl_u.pl_a.pl_flags); PMCLOG_READ32(le,noop); PMCLOG_READ64(le,ev->pl_u.pl_a.pl_rate); - ev->pl_u.pl_a.pl_evname = pmc_pmu_event_get_by_idx(ps->ps_cpuid, ev->pl_u.pl_a.pl_event); - if (ev->pl_u.pl_a.pl_evname != NULL) - break; - else if ((ev->pl_u.pl_a.pl_evname = - _pmc_name_of_event(ev->pl_u.pl_a.pl_event, ps->ps_arch)) - == NULL) { + + /* + * Could be either a PMC event code or a PMU event index; + * assume that their encodings don't overlap (i.e. no PMU event + * table is more than 0x1000 entries) to distinguish them here. + * Otherwise pmc_pmu_event_get_by_idx will go out of bounds if + * given a PMC event code when it knows about that CPU. + * + * XXX: Ideally we'd have user flags to give us that context. + */ + if (ev->pl_u.pl_a.pl_event < PMC_EVENT_FIRST) + ev->pl_u.pl_a.pl_evname = + pmc_pmu_event_get_by_idx(ps->ps_cpuid, + ev->pl_u.pl_a.pl_event); + else if (ev->pl_u.pl_a.pl_event <= PMC_EVENT_LAST) + ev->pl_u.pl_a.pl_evname = + _pmc_name_of_event(ev->pl_u.pl_a.pl_event, + ps->ps_arch); + else + ev->pl_u.pl_a.pl_evname = NULL; + if (ev->pl_u.pl_a.pl_evname == NULL) { printf("unknown event\n"); goto error; } |