ci: change from alpine to debian bookworm the golang image for unit-tests (#6)

* ci: change from alpine to debian bookworm the golang image for unit-tests

* fix: specify "arm64" arch for unit-tests

* ci: add build badge in README.md

Author: pkoutsovasilis

.buildkite/pipeline.yml

@@ -9,4 +9,4 @@ steps:
     key: "test"
     command: ".buildkite/test.sh"
     agents:
-      image: "golang:1.21.6-alpine3.19"
+      image: "golang:1.21.6-bookworm"

README.md

@@ -1,4 +1,6 @@
 # Tracing KProbes from BTF (tk-btf)
+[![Build status](https://badge.buildkite.com/127fe118a0ca01517075701041070b66e1a6c27322132658db.svg)](https://buildkite.com/elastic/tk-btf)
+
 `tk-btf` is a Go package to fabricate the string representation of [Linux tracing kprobes](https://docs.kernel.org/trace/kprobetrace.html#usage-examples) based on [BTF](https://docs.kernel.org/bpf/btf.html) files.
 
 ## Quick Start

spec_test.go

@@ -20,7 +20,6 @@ package tkbtf
 import (
 	"os"
 	"path/filepath"
-	"runtime"
 	"testing"
 
 	"github.com/cilium/ebpf/btf"
@@ -35,7 +34,7 @@ func TestSpec(t *testing.T) {
 	}()
 
 	spec := generateBTFSpec()
-	spec.regs, err = getRegistersResolver(runtime.GOARCH)
+	spec.regs, err = getRegistersResolver("arm64")
 	require.NoError(t, err)
 
 	c := struct {
@@ -79,7 +78,9 @@ func TestSpec(t *testing.T) {
 	require.NoError(t, err)
 
 	// load stripped spec from path; NOTE this an actual implementation of *btf.Spec
-	pathSpec, err := NewSpecFromPath(fileName, nil)
+	pathSpec, err := NewSpecFromPath(fileName, &SpecOptions{
+		arch: "arm64",
+	})
 	require.NoError(t, err)
 	// check that qstr is actually stripped
 	_, err = pathSpec.spec.AnyTypesByName("qstr")
@@ -109,7 +110,9 @@ func TestSpec(t *testing.T) {
 		_ = file.Close()
 	}()
 
-	readerSpec, err := NewSpecFromReader(file, nil)
+	readerSpec, err := NewSpecFromReader(file, &SpecOptions{
+		arch: "arm64",
+	})
 	require.NoError(t, err)
 	// check that qstr is actually stripped
 	_, err = readerSpec.spec.AnyTypesByName("qstr")