Add a symbols_map tool for extracting identifiers from elf and r8 files
Add a symbols_map tool that can extract an identifiying hash from
and elf file or an r8 dictionary. The tool writes the hash to a
textproto, and also supports a merge mode to combine textprotos into
a output file for inclusion in the build artifacts.
Bug: 218888599
Test: m dist
Test: symbols_map_test.go
Change-Id: Icd3ed6e5510e058c92d97c78759e7a4cfcdbb6ca
diff --git a/cmd/symbols_map/elf_test.go b/cmd/symbols_map/elf_test.go
new file mode 100644
index 0000000..e616228
--- /dev/null
+++ b/cmd/symbols_map/elf_test.go
@@ -0,0 +1,45 @@
+// Copyright 2022 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package main
+
+import (
+ "bytes"
+ "encoding/binary"
+ "reflect"
+ "testing"
+)
+
+func Test_readNote(t *testing.T) {
+ note := []byte{
+ 0x04, 0x00, 0x00, 0x00,
+ 0x10, 0x00, 0x00, 0x00,
+ 0x03, 0x00, 0x00, 0x00,
+ 0x47, 0x4e, 0x55, 0x00,
+ 0xca, 0xaf, 0x44, 0xd2, 0x82, 0x78, 0x68, 0xfe, 0xc0, 0x90, 0xa3, 0x43, 0x85, 0x36, 0x6c, 0xc7,
+ }
+
+ descs, err := readNote(bytes.NewBuffer(note), binary.LittleEndian)
+ if err != nil {
+ t.Fatalf("unexpected error in readNote: %s", err)
+ }
+
+ expectedDescs := map[string][]byte{
+ "GNU\x00": []byte{0xca, 0xaf, 0x44, 0xd2, 0x82, 0x78, 0x68, 0xfe, 0xc0, 0x90, 0xa3, 0x43, 0x85, 0x36, 0x6c, 0xc7},
+ }
+
+ if !reflect.DeepEqual(descs, expectedDescs) {
+ t.Errorf("incorrect return, want %#v got %#v", expectedDescs, descs)
+ }
+}