address PR comments

Author: shatzi

dd-java-agent/agent-debugger/src/test/java/com/datadog/debugger/origin/CodeOriginTest.java

@@ -196,6 +196,7 @@ private static void checkEntrySpanTags(MutableSpan span, boolean includeSnapshot
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "file"));
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "line"));
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "method"));
+    assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "signature"));
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "type"));
 
     if (includeSnapshot) {
@@ -224,7 +225,7 @@ private static void checkExitSpanTags(MutableSpan span, boolean includeSnapshot)
         format("Existing keys for %s: %s", span.getOperationName(), new TreeSet<>(ldKeys(span)));
 
     assertKeyPresent(span, DD_STACK_CODE_ORIGIN_TYPE);
-    assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 3, "file"));
+    assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "file"));
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "line"));
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "method"));
     assertKeyPresent(span, format(DD_STACK_CODE_ORIGIN_FRAME, 0, "type"));

dd-trace-api/src/main/java/datadog/trace/api/DDTags.java

@@ -6,7 +6,7 @@ public class DDTags {
   public static final String DD_STACK_CODE_ORIGIN_PREFIX = DD_LD_PREFIX + "code_origin.";
 
   public static final String DD_STACK_CODE_ORIGIN_TYPE = DD_STACK_CODE_ORIGIN_PREFIX + "type";
-  // _dd.stack.code_origin.frame.%d.file|line|method|type|snapshot_id
+  // _dd.ld.code_origin.frames.%d.file|line|method|type|snapshot_id
   public static final String DD_STACK_CODE_ORIGIN_FRAME =
       DD_STACK_CODE_ORIGIN_PREFIX + "frames.%d.%s";