Fix bpf code to work with LLVM 20

.circleci/config.yml

@@ -10,7 +10,7 @@ executors:
     resource_class: medium
   arm:
     machine:
-      image: ubuntu-2204:current
+      image: ubuntu-2404:current
     resource_class: arm.medium
 
 jobs:
@@ -32,7 +32,7 @@ jobs:
       - run: CGO_APPS=1 make
   build:
     machine:
-      image: ubuntu-2204:current
+      image: ubuntu-2404:current
     resource_class: medium
     parallelism: 3
     steps:

pkg/collector/bpf/lib/bpf_path.h

@@ -91,7 +91,7 @@ FUNC_INLINE int prepend_name(char *buf, char **bufptr, int *buflen, const unsign
 	if (namelen < 0 || namelen > 256)
 		return -ENAMETOOLONG;
 
-	s64 buffer_offset = (s64)(*bufptr) - (s64)buf;
+	u64 buffer_offset = (u64)(*bufptr) - (u64)buf;
 
 	// Change name and namelen to fit in the buffer.
 	// We prefer to store the part of it that fits rather than discard it.
@@ -111,8 +111,7 @@ FUNC_INLINE int prepend_name(char *buf, char **bufptr, int *buflen, const unsign
 	// This will never happen. buffer_offset is the diff of the initial buffer pointer
 	// with the current buffer pointer. This will be at max 4096 bytes (similar to the initial
 	// size).
-	// Needed to bound that for bpf_probe_read call.
-	if (buffer_offset < 0 || buffer_offset >= MAX_BUF_LEN)
+	if (buffer_offset >= MAX_BUF_LEN)
 		return -ENAMETOOLONG;
 
 	if (write_slash)

pkg/collector/ebpf.go

@@ -1104,6 +1104,11 @@ func loadObject(path string) (*ebpf.Collection, error) {
 	// Instantiate a Collection from a CollectionSpec.
 	coll, err := ebpf.NewCollection(spec)
 	if err != nil {
+		var ve *ebpf.VerifierError
+		if errors.As(err, &ve) {
+			err = fmt.Errorf("%+v", ve) //nolint:errorlint
+		}
+
 		return nil, fmt.Errorf("failed to instantiate collection: %w", err)
 	}
 

scripts/install_clang.sh

@@ -13,8 +13,10 @@ find_llvm() {
         if [[ "$dir" == *"llvm"* ]]; then
             llvm_ver=$(echo "${dir}" | grep -o "llvm-[0-9]\+" | cut -d "-" -f2)
             if (( ${llvm_ver} >= 18 )); then
-                LLVM_DIR="${dir}"
-                break
+                if [ -f "${dir}/bin/clang" ] && [ -f "${dir}/bin/llc" ]; then
+                    LLVM_DIR="${dir}"
+                    break
+                fi
             fi
         fi
     done

website/package.json

@@ -56,6 +56,9 @@
   },
   "resolutions": {
     "path-to-regexp": "1.9.0",
-    "dompurify": "3.2.4"
+    "dompurify": "3.2.4",
+    "webpack-dev-server": "5.2.1",
+    "brace-expansion": "1.1.12",
+    "on-headers": "1.1.0"
   }
 }