fix: filter out empty named symbols when building perf-map

Author: GuillaumeLagrange

src/executor/wall_time/perf/perf_map.rs

@@ -100,8 +100,16 @@ impl ModuleSymbols {
             }
         }
 
-        // Filter out any symbols that still have zero size
-        symbols.retain(|symbol| symbol.size > 0);
+        // Filter out any symbols that still have zero size or an empty name
+        symbols.retain(|symbol| {
+            let should_keep = symbol.size > 0 && !symbol.name.is_empty();
+
+            if !should_keep {
+                trace!("Filtering out symbol: {symbol:?}");
+            }
+
+            should_keep
+        });
 
         if symbols.is_empty() {
             return Err(anyhow::anyhow!("No symbols found"));

src/executor/wall_time/perf/snapshots/codspeed__executor__wall_time__perf__debug_info__tests__rust_divan_debug_info.snap

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:cecbdde3c24b806a75f9e8a438f82419f33f9fcc86b9966352685a35784abec6
-size 520675
+oid sha256:3a775c5e200672234bbf71312cd4db90bfb81cf99907ca0b7c45cc38cb34679f
+size 520147

src/executor/wall_time/perf/snapshots/codspeed__executor__wall_time__perf__debug_info__tests__the_algorithms_debug_info.snap

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:da29e6ceb514be0437b501e406016656d2ddbc9f1cd0619ea29df64e7bc69e54
-size 568064
+oid sha256:e72d1de3d0e4984f132ed2573cf996015da2db162df712bd58abe64fda510005
+size 567622

src/executor/wall_time/perf/snapshots/codspeed__executor__wall_time__perf__perf_map__tests__rust_divan_symbols.snap

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:8355b90acf9569acb7288849bda81ec1d10b8457245088ed78835df7d6785fdc
-size 499264
+oid sha256:96076d39277b33ed3bbe060af13400acf3007a61c4b28fe5d93609122774a8dc
+size 498482

src/executor/wall_time/perf/snapshots/codspeed__executor__wall_time__perf__perf_map__tests__the_algorithms_symbols.snap

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f74ef3ee84c89fc51e4546c0d8a41fe4565f91004eb80bed83812df31d01e4fb
-size 557917
+oid sha256:4fba1f2413398a08fb12a54ecbefbf69c3a18cf5bf9d544386f2e1d794bf81f1
+size 557134