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X-Proofpoint-GUID: QpGPOVTgWK_gAyBEVXjAn-W2wAMKXt0Z From: Eugene Loh Add a safety net to dt_provider_create(), to check if a specified provider has already been inserted. This also requires a corresponding change in dt_provider_lookup(), so that it will work even if no providers have yet been inserted. Signed-off-by: Eugene Loh --- libdtrace/dt_provider.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libdtrace/dt_provider.c b/libdtrace/dt_provider.c index 848fdc132..9d75225fa 100644 --- a/libdtrace/dt_provider.c +++ b/libdtrace/dt_provider.c @@ -114,6 +114,8 @@ dt_provider_lookup(dtrace_hdl_t *dtp, const char *name) return NULL; strcpy(tmpl.desc.dtvd_name, name); + if (dtp->dt_provs == NULL) + return NULL; return dt_htab_lookup(dtp->dt_provs, &tmpl); } @@ -124,6 +126,10 @@ dt_provider_create(dtrace_hdl_t *dtp, const char *name, { dt_provider_t *pvp; + pvp = dt_provider_lookup(dtp, name); + if (pvp) + return pvp; + if ((pvp = dt_zalloc(dtp, sizeof(dt_provider_t))) == NULL) goto nomem; -- 2.47.3