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Each provider that supports such discovery needs to provide: > > *) a function discover() that performs discovery on behalf of the provider > > *) a function add_probe() that adds a particular (discovered) probe > > To support looping over providers, move dt_providers[] from > dt_open.c to dt_provider.c and extern it in dt_provider.h. > > Signed-off-by: Eugene Loh Reviewed-by: Kris Van Hees > --- > libdtrace/dt_bpf.c | 4 ++++ > libdtrace/dt_open.c | 22 +----------------- > libdtrace/dt_provider.c | 51 +++++++++++++++++++++++++++++++++++++++++ > libdtrace/dt_provider.h | 6 +++++ > libdtrace/dt_work.c | 3 +++ > 5 files changed, 65 insertions(+), 21 deletions(-) > > diff --git a/libdtrace/dt_bpf.c b/libdtrace/dt_bpf.c > index ad11d178e..856110306 100644 > --- a/libdtrace/dt_bpf.c > +++ b/libdtrace/dt_bpf.c > @@ -1275,6 +1275,10 @@ dt_bpf_load_progs(dtrace_hdl_t *dtp, uint_t cflags) > int fd; > int rc = -1; > > + /* Handle probes discovered after compilation. */ > + if (prp->prov->impl->add_probe) > + prp->prov->impl->add_probe(dtp, prp); > + > dp = prp->difo; > if (dp == NULL) > continue; > diff --git a/libdtrace/dt_open.c b/libdtrace/dt_open.c > index 848141ddc..1f586fc4f 100644 > --- a/libdtrace/dt_open.c > +++ b/libdtrace/dt_open.c > @@ -61,26 +61,6 @@ const dt_version_t _dtrace_versions[] = { > 0 > }; > > -/* > - * List of provider modules that register providers and probes. A single > - * provider module may create multiple providers. > - */ > -static const dt_provimpl_t *dt_providers[] = { > - &dt_dtrace, /* list dt_dtrace first */ > - &dt_cpc, > - &dt_fbt_fprobe, > - &dt_io, > - &dt_ip, > - &dt_lockstat, > - &dt_proc, > - &dt_profile, > - &dt_rawtp, > - &dt_sched, > - &dt_sdt, > - &dt_syscall, > - &dt_uprobe, > -}; > - > /* > * Table of global identifiers. This is used to populate the global identifier > * hash when a new dtrace client open occurs. For more info see dt_ident.h. > @@ -1210,7 +1190,7 @@ dtrace_init(dtrace_hdl_t *dtp) > * known providers. > */ > dt_probe_init(dtp); > - for (i = 0; i < ARRAY_SIZE(dt_providers); i++) { > + for (i = 0; dt_providers[i]; i++) { > int n; > > n = dt_providers[i]->populate(dtp); > diff --git a/libdtrace/dt_provider.c b/libdtrace/dt_provider.c > index 8cfef0ba2..354dfa1ee 100644 > --- a/libdtrace/dt_provider.c > +++ b/libdtrace/dt_provider.c > @@ -18,10 +18,32 @@ > #include > > #include > +#include > #include > #include > #include > > +/* > + * List of provider modules that register providers and probes. A single > + * provider module may create multiple providers. > + */ > +const dt_provimpl_t *dt_providers[] = { > + &dt_dtrace, /* list dt_dtrace first */ > + &dt_cpc, > + &dt_fbt_fprobe, > + &dt_io, > + &dt_ip, > + &dt_lockstat, > + &dt_proc, > + &dt_profile, > + &dt_rawtp, > + &dt_sched, > + &dt_sdt, > + &dt_syscall, > + &dt_uprobe, > + NULL > +}; > + > static uint32_t > dt_provider_hval(const dt_provider_t *pvp) > { > @@ -149,3 +171,32 @@ dt_provider_xref(dtrace_hdl_t *dtp, dt_provider_t *pvp, id_t id) > BT_SET(pvp->pv_xrefs, id); > return 0; > } > + > +int > +dt_provider_discover(dtrace_hdl_t *dtp) > +{ > + int i, prid = dtp->dt_probe_id; > + > + /* Discover new probes. */ > + for (i = 0; dt_providers[i]; i++) { > + if (dt_providers[i]->discover && dt_providers[i]->discover(dtp) < 0) > + return -1; /* errno is already set */ > + } > + > + /* Add them. */ > + for ( ; prid < dtp->dt_probe_id; prid++) { > + dt_probe_t *prp = dtp->dt_probes[prid]; > + int rc; > + > + dt_probe_enable(dtp, prp); > + > + if (prp->prov->impl->add_probe == NULL) > + continue; > + > + rc = prp->prov->impl->add_probe(dtp, prp); > + if (rc < 0) > + return rc; > + } > + > + return 0; > +} > diff --git a/libdtrace/dt_provider.h b/libdtrace/dt_provider.h > index 17b1844cb..384d4fd33 100644 > --- a/libdtrace/dt_provider.h > +++ b/libdtrace/dt_provider.h > @@ -62,6 +62,9 @@ typedef struct dt_provimpl { > int (*probe_info)(dtrace_hdl_t *dtp, /* get probe info */ > const struct dt_probe *prp, > int *argcp, dt_argdesc_t **argvp); > + int (*discover)(dtrace_hdl_t *dtp); /* discover new probes */ > + int (*add_probe)(dtrace_hdl_t *dtp, /* add a new probe */ > + struct dt_probe *prp); > void (*detach)(dtrace_hdl_t *dtp, /* probe cleanup */ > const struct dt_probe *prb); > void (*probe_destroy)(dtrace_hdl_t *dtp, /* free probe data */ > @@ -86,6 +89,8 @@ extern dt_provimpl_t dt_sdt; > extern dt_provimpl_t dt_syscall; > extern dt_provimpl_t dt_uprobe; > > +extern const dt_provimpl_t *dt_providers[]; > + > typedef struct dt_provider { > dt_list_t pv_list; /* list forward/back pointers */ > struct dt_hentry he; /* htab links */ > @@ -110,6 +115,7 @@ extern dt_provider_t *dt_provider_create(dtrace_hdl_t *, const char *, > const dt_provimpl_t *, > const dtrace_pattr_t *, void *); > extern int dt_provider_xref(dtrace_hdl_t *, dt_provider_t *, id_t); > +extern int dt_provider_discover(dtrace_hdl_t *dtp); > > #ifdef __cplusplus > } > diff --git a/libdtrace/dt_work.c b/libdtrace/dt_work.c > index 11335345a..5318cdb7e 100644 > --- a/libdtrace/dt_work.c > +++ b/libdtrace/dt_work.c > @@ -362,6 +362,9 @@ dtrace_work(dtrace_hdl_t *dtp, FILE *fp, dtrace_consume_probe_f *pfunc, > dtrace_workstatus_t rval; > int gen; > > + if (dt_provider_discover(dtp) < 0) > + return DTRACE_WORKSTATUS_ERROR; > + > switch (dtrace_status(dtp)) { > case DTRACE_STATUS_EXITED: > case DTRACE_STATUS_STOPPED: > -- > 2.43.5 >