[gcmole] Add heap-snapshot-generator.cc to ignored_files

Bug: v8:9993
Change-Id: I06428edd7f01805d08927718e4711298c731d2e3
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2253844
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Reviewed-by: Clemens Backes <clemensb@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#68450}

tools/gcmole/BUILD.gn

@@ -16,6 +16,7 @@ group("v8_run_gcmole") {
     "parallel.py",
     "run-gcmole.py",
     "suspects.whitelist",
+    "ignored_files",
     "test-expectations.txt",
 
     # The following contains all relevant source and build files.
@@ -37,9 +38,7 @@ group("v8_run_gcmole") {
     "$target_gen_dir/../../torque-generated/",
   ]
 
-  deps = [
-    "../../:run_torque",
-  ]
+  deps = [ "../../:run_torque" ]
 
   if (v8_gcmole) {
     # This assumes gcmole tools have been fetched by a hook

tools/gcmole/gcmole.cc

@@ -1519,7 +1519,29 @@ class ProblemsFinder : public clang::ASTConsumer,
     }
   }
 
+  bool TranslationUnitIgnored() {
+    if (!ignored_files_loaded_) {
+      std::ifstream fin("tools/gcmole/ignored_files");
+      std::string s;
+      while (fin >> s) ignored_files_.insert(s);
+      ignored_files_loaded_ = true;
+    }
+
+    clang::FileID main_file_id = sm_.getMainFileID();
+    std::string filename = sm_.getFileEntryForID(main_file_id)->getName().str();
+
+    bool result = ignored_files_.find(filename) != ignored_files_.end();
+    if (result) {
+      llvm::outs() << "Ignoring file " << filename << "\n";
+    }
+    return result;
+  }
+
   virtual void HandleTranslationUnit(clang::ASTContext &ctx) {
+    if (TranslationUnitIgnored()) {
+      return;
+    }
+
     Resolver r(ctx);
 
     // It is a valid situation that no_gc_decl == NULL when the
@@ -1596,6 +1618,9 @@ class ProblemsFinder : public clang::ASTConsumer,
   clang::DiagnosticsEngine& d_;
   clang::SourceManager& sm_;
 
+  bool ignored_files_loaded_ = false;
+  std::set<std::string> ignored_files_;
+
   FunctionAnalyzer* function_analyzer_;
 };
 

tools/gcmole/ignored_files

@@ -0,0 +1 @@
+src/profiler/heap-snapshot-generator.cc