gdb/gdb-dlopen-stap-probe-1of7....

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http://sourceware.org/ml/gdb-patches/2013-05/msg00625.html
Subject: [RFA 1/7] Probes API convenience patch
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This patch exposes part of the probes API in a more convenient
way. I've included it for completeness, but it has previously
been approved:
http://www.cygwin.com/ml/gdb-patches/2012-07/msg00340.html
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2013-05-16 Gary Benson <gbenson@redhat.com>
* probe.h (get_probe_argument_count): New declaration.
(evaluate_probe_argument): Likewise.
* probe.c (get_probe_argument_count): New function.
(evaluate_probe_argument): Likewise.
(probe_safe_evaluate_at_pc): Use the above new functions.
diff --git a/gdb/probe.h b/gdb/probe.h
index 8d44ca2..1d29b87 100644
--- a/gdb/probe.h
+++ b/gdb/probe.h
@@ -214,6 +214,16 @@ extern void info_probes_for_ops (char *arg, int from_tty,
extern struct cmd_list_element **info_probes_cmdlist_get (void);
+/* Return the argument count of the specified probe. */
+
+extern unsigned get_probe_argument_count (struct probe *probe);
+
+/* Evaluate argument N of the specified probe. N must be between 0
+ inclusive and get_probe_argument_count exclusive. */
+
+extern struct value *evaluate_probe_argument (struct probe *probe,
+ unsigned n);
+
/* A convenience function that finds a probe at the PC in FRAME and
evaluates argument N, with 0 <= N < number_of_args. If there is no
probe at that location, or if the probe does not have enough arguments,
diff --git a/gdb/probe.c b/gdb/probe.c
index 77f3b13..a61f4ea 100644
--- a/gdb/probe.c
+++ b/gdb/probe.c
@@ -608,28 +608,55 @@ info_probes_command (char *arg, int from_tty)
/* See comments in probe.h. */
+unsigned
+get_probe_argument_count (struct probe *probe)
+{
+ const struct sym_probe_fns *probe_fns;
+
+ gdb_assert (probe->objfile != NULL);
+ gdb_assert (probe->objfile->sf != NULL);
+
+ probe_fns = probe->objfile->sf->sym_probe_fns;
+
+ gdb_assert (probe_fns != NULL);
+
+ return probe_fns->sym_get_probe_argument_count (probe);
+}
+
+/* See comments in probe.h. */
+
+struct value *
+evaluate_probe_argument (struct probe *probe, unsigned n)
+{
+ const struct sym_probe_fns *probe_fns;
+
+ gdb_assert (probe->objfile != NULL);
+ gdb_assert (probe->objfile->sf != NULL);
+
+ probe_fns = probe->objfile->sf->sym_probe_fns;
+
+ gdb_assert (probe_fns != NULL);
+
+ return probe_fns->sym_evaluate_probe_argument (probe, n);
+}
+
+/* See comments in probe.h. */
+
struct value *
probe_safe_evaluate_at_pc (struct frame_info *frame, unsigned n)
{
struct probe *probe;
- const struct sym_probe_fns *probe_fns;
unsigned n_args;
probe = find_probe_by_pc (get_frame_pc (frame));
if (!probe)
return NULL;
- gdb_assert (probe->objfile != NULL);
- gdb_assert (probe->objfile->sf != NULL);
- gdb_assert (probe->objfile->sf->sym_probe_fns != NULL);
-
- probe_fns = probe->objfile->sf->sym_probe_fns;
- n_args = probe_fns->sym_get_probe_argument_count (probe);
-
+ n_args = get_probe_argument_count (probe);
if (n >= n_args)
return NULL;
- return probe_fns->sym_evaluate_probe_argument (probe, n);
+ return evaluate_probe_argument (probe, n);
}
/* See comment in probe.h. */
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