print debugging

Author: bdero

runtime/dart_snapshot.cc

@@ -63,13 +63,15 @@ static std::shared_ptr<const fml::Mapping> SearchMapping(
     // invalid mapping. If all the other methods for resolving the data also
     // fail, the engine will stop with accompanying error logs.
     if (auto mapping = embedder_mapping_callback()) {
+      FML_LOG(ERROR) << "SearchMapping: return mapping";
       return mapping;
     }
   }
 
   // Attempt to open file at path specified.
   if (!file_path.empty()) {
     if (auto file_mapping = GetFileMapping(file_path, is_executable)) {
+      FML_LOG(ERROR) << "SearchMapping: return file_mapping";
       return file_mapping;
     }
   }
@@ -80,6 +82,8 @@ static std::shared_ptr<const fml::Mapping> SearchMapping(
     auto symbol_mapping = std::make_unique<const fml::SymbolMapping>(
         native_library, native_library_symbol_name);
     if (symbol_mapping->GetMapping() != nullptr) {
+      FML_LOG(ERROR)
+          << "SearchMapping: return symbol_mapping (native library path)";
       return symbol_mapping;
     }
   }
@@ -90,24 +94,38 @@ static std::shared_ptr<const fml::Mapping> SearchMapping(
     auto symbol_mapping = std::make_unique<const fml::SymbolMapping>(
         loaded_process, native_library_symbol_name);
     if (symbol_mapping->GetMapping() != nullptr) {
+      FML_LOG(ERROR)
+          << "SearchMapping: return symbol_mapping (current process)";
       return symbol_mapping;
     }
   }
 
+  FML_LOG(ERROR) << "SearchMapping: return nullptr";
   return nullptr;
 }
 
 #endif  // !DART_SNAPSHOT_STATIC_LINK
 
 static std::shared_ptr<const fml::Mapping> ResolveVMData(
     const Settings& settings) {
+  FML_LOG(ERROR) << "static ResolveVMData(settings)";
 #if DART_SNAPSHOT_STATIC_LINK
+  FML_LOG(ERROR) << "Static link";
   return std::make_unique<fml::NonOwnedMapping>(kDartVmSnapshotData,
                                                 0,        // size
                                                 nullptr,  // release_func
                                                 true      // dontneed_safe
   );
 #else   // DART_SNAPSHOT_STATIC_LINK
+  FML_LOG(ERROR) << "Not static link; search mapping";
+  FML_LOG(ERROR) << "settings.vm_snapshot_data: "
+                 << static_cast<bool>(settings.vm_snapshot_data);
+  FML_LOG(ERROR) << "settings.vm_snapshot_data_path: "
+                 << settings.vm_snapshot_data_path;
+  FML_LOG(ERROR) << "settings.application_library_path: ";
+  for (const auto& path : settings.application_library_path) {
+    FML_LOG(ERROR) << " - " << path;
+  }
   return SearchMapping(
       settings.vm_snapshot_data,          // embedder_mapping_callback
       settings.vm_snapshot_data_path,     // file_path
@@ -186,6 +204,7 @@ fml::RefPtr<const DartSnapshot> DartSnapshot::VMSnapshotFromSettings(
   if (snapshot->IsValid()) {
     return snapshot;
   }
+  FML_LOG(ERROR) << "Snapshot not valid";
   return nullptr;
 }