whatcanGOwrong

go/pkg/mod/github.com/cilium/ebpf@v0.11.0/testdata/strings.c

@@ -0,0 +1,29 @@
+#include "common.h"
+
+char __license[] __section("license") = "MIT";
+
+typedef char custkey[48];
+
+struct {
+	__uint(type, BPF_MAP_TYPE_HASH);
+	__uint(max_entries, 2);
+	__type(key, custkey);
+	__type(value, uint32_t);
+} my_map __section(".maps");
+
+static void *(*bpf_map_lookup_elem)(void *map, const void *key)                                   = (void *)1;
+static long (*bpf_map_update_elem)(void *map, const void *key, const void *value, uint64_t flags) = (void *)2;
+
+#define KEY "This string is allocated in the string section\n"
+
+__section("xdp") int filter() {
+	uint32_t *value = bpf_map_lookup_elem(&my_map, KEY);
+	if (value)
+		(*value)++;
+	else {
+		uint32_t newValue = 1;
+		bpf_map_update_elem(&my_map, KEY, &newValue, 0);
+	}
+
+	return 2;
+}