CI: Check for differences in the eBPF binary blobs (#305)

Signed-off-by: Florian Lehner <[email protected]>

.github/workflows/unit-test-on-pull-request.yml

@@ -67,6 +67,29 @@ jobs:
       - name: Tests
         run: make test TARGET_ARCH=${{ matrix.target_arch }}
 
+  check-ebpf-blobs:
+    name: Check for differences in the eBPF binary blobs
+    runs-on: ubuntu-24.04
+    container: otel/opentelemetry-ebpf-profiler-dev:latest
+    steps:
+      - name: Clone code
+        uses: actions/checkout@v4
+      - name: Hash eBPF blobs
+        run: |
+          sha256sum support/ebpf/tracer.ebpf.release.* > ebpf-blobs.hash
+      - name: Rebuild eBPF blobs
+        run: |
+          rm support/ebpf/tracer.ebpf.release.*
+          make amd64 -C support/ebpf
+          make arm64 -C support/ebpf
+      - name: Check for differences
+        run: |
+          if ! sha256sum --check ebpf-blobs.hash; then
+            echo "Please rebuild and commit the updated eBPF binary blobs."
+            exit 1
+          fi
+
+
   build-integration-test-binaries:
     name: Build integration test binaries (${{ matrix.target_arch }})
     runs-on: ubuntu-24.04