[ktap] [PATCH 1/2] userspace: add options to print sdt notes and symbols from DSO.
- From: Azat Khuzhin <a3at.mail@xxxxxxxxx>
- To: ktap@xxxxxxxxxxxxx
- Date: Sun, 17 Nov 2013 17:38:52 +0400
Examples:
./ktap -F ./ktap # print symbols
./ktap -M ./ktap # print sdt markers
Don't available without libelf.
Signed-off-by: Azat Khuzhin <a3at.mail@xxxxxxxxx>
---
userspace/main.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/userspace/main.c b/userspace/main.c
index 658c608..d50b89a 100644
--- a/userspace/main.c
+++ b/userspace/main.c
@@ -39,6 +39,7 @@
#include "../interpreter/kp_obj.h"
#include "../interpreter/kp_str.h"
#include "../interpreter/kp_tab.h"
+#include "symbol.h"
/*******************************************************************/
@@ -348,6 +349,10 @@ static void usage(const char *msg_fmt, ...)
" -v : enable verbose mode\n"
" -s : simple event tracing\n"
" -b : list byte codes\n"
+#ifndef NO_LIBELF
+" -F : list available functions from DSO\n"
+" -M : list available sdt notes from DSO\n"
+#endif
" file : program read from script file\n"
" -- cmd [args] : workload to tracing\n");
@@ -465,6 +470,23 @@ static const char *script_file;
static int script_args_start;
static int script_args_end;
+#ifndef NO_LIBELF
+struct binary_base
+{
+ int type;
+ const char *binary;
+};
+static int print_symbol(const char *name, vaddr_t addr, void *arg)
+{
+ struct binary_base *base = (struct binary_base *)arg;
+ const char *type = base->type == FIND_SYMBOL ?
+ "probe" : "sdt";
+
+ printf("%s:%s:%s\n", type, base->binary, name);
+ return 0;
+}
+#endif
+
static void parse_option(int argc, char **argv)
{
char pid[32] = {0};
@@ -532,6 +554,27 @@ static void parse_option(int argc, char **argv)
case 'b':
dump_bytecode = 1;
break;
+#ifndef NO_LIBELF
+ case 'F':
+ case 'M': {
+ const char *binary = next_arg;
+ int type = argv[i][1] == 'F' ? FIND_SYMBOL :
FIND_STAPSDT_NOTE;
+ struct binary_base base = {
+ .type = type,
+ .binary = binary,
+ };
+ int ret;
+
+ ret = parse_dso_symbols(binary, type,
+ print_symbol, (void *)&base);
+ if (ret <= 0) {
+ fprintf(stderr, "error: no symbols in binary
%s\n",
+ binary);
+ exit(EXIT_FAILURE);
+ }
+ exit(EXIT_SUCCESS);
+ }
+#endif
case 'V':
case '?':
case 'h':
--
1.8.4.rc3
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