There are many places in libdtrace where errno can be set. When an

error is returned all the way back to the dtrace app, it's hard to
figure out where that error came from.

Add a couple of functions to get and set the error location which can
be optionally compiled into the library.

1 files changed, 18 insertions, 0 deletions

diff --git a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c
index 5005f59..263f70c 100644
--- a/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c
+++ b/cddl/contrib/opensolaris/lib/libdtrace/common/dt_error.c
@@ -25,6 +25,7 @@
 
 #pragma ident	"%Z%%M%	%I%	%E% SMI"
 
+#include <string.h>
 #include <strings.h>
 #include <dt_impl.h>
 
@@ -138,12 +139,29 @@ dtrace_errno(dtrace_hdl_t *dtp)
 	return (dtp->dt_errno);
 }
 
+#if defined(sun)
 int
 dt_set_errno(dtrace_hdl_t *dtp, int err)
 {
 	dtp->dt_errno = err;
 	return (-1);
 }
+#else
+int
+_dt_set_errno(dtrace_hdl_t *dtp, int err, const char *errfile, int errline)
+{
+	dtp->dt_errno = err;
+	dtp->dt_errfile = errfile;
+	dtp->dt_errline = errline;
+	return (-1);
+}
+
+void dt_get_errloc(dtrace_hdl_t *dtp, const char **p_errfile, int *p_errline)
+{
+	*p_errfile = dtp->dt_errfile;
+	*p_errline = dtp->dt_errline;
+}
+#endif
 
 void
 dt_set_errmsg(dtrace_hdl_t *dtp, const char *errtag, const char *region,