ebpf-lab

commit 227a769d8b187183bc7f598c06697ffe76cf988d
parent e22526890f50a487ba922ae795fa57c6513fd970
Author: Andreas Gruhler <andreas.gruhler@adfinis.com>
Date:   Mon, 15 May 2023 16:59:35 +0200

feat: bpftrace uprobe example

Diffstat:
M
.gitignore
 | 
1
+
A
samples/demo-app/Makefile
 | 
4
++++
A
samples/demo-app/demo.c
 | 
20
++++++++++++++++++++

3 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -2,3 +2,4 @@
 **manifest.json
 **.swp
 packer/output
+samples/demo-app/demo
diff --git a/samples/demo-app/Makefile b/samples/demo-app/Makefile
@@ -0,0 +1,4 @@
+default: demo
+	gcc demo.c -o demo
+clean:
+	rm demo
diff --git a/samples/demo-app/demo.c b/samples/demo-app/demo.c
@@ -0,0 +1,20 @@
+#include <stdio.h>
+#include <time.h>
+
+int output(int hour, int min, int sec) {
+  printf("Current time: %d:%d:%d \n", hour, min, sec);
+}
+
+int main(int argc, char** argv) {
+  struct timespec timer = { 0, 700000000 };
+  time_t datetime;
+  // see /usr/include/bits/types/struct_tm.h
+  struct tm i;
+
+  for (;;) {
+    datetime = time(NULL);
+    localtime_r(&datetime, &i);
+    output(i.tm_hour, i.tm_min, i.tm_sec);
+    nanosleep(&timer, &timer);
+  }
+}