Make target_experiment with with OSS-Fuzz-Gen. (#12691)

OSS-Fuzz-Gen creates fake project names, but for cached images to work
we need the real name.

infra/build/functions/build_project.py

@@ -167,8 +167,15 @@ def __init__(self, name, project_yaml, dockerfile):
     else:
       self.main_repo = ''
 
+    # This is set to enable build infra to use cached images (which are
+    # specific to a sanitizer).
+    # TODO: find a better way to handle this.
     self.cached_sanitizer = None
 
+    # This is used by OSS-Fuzz-Gen, which generates fake project names for each
+    # benchmark. We still need access to the real project name in some cases.
+    self.real_name = self.name
+
   @property
   def sanitizers(self):
     """Returns processed sanitizers."""
@@ -184,7 +191,7 @@ def image(self):
     return f'gcr.io/{build_lib.IMAGE_PROJECT}/{self.name}'
 
   def cached_image(self, sanitizer):
-    return _CACHED_IMAGE.format(name=self.name, sanitizer=sanitizer)
+    return _CACHED_IMAGE.format(name=self.real_name, sanitizer=sanitizer)
 
 
 def get_last_step_id(steps):

infra/build/functions/target_experiment.py

@@ -26,10 +26,19 @@
 import build_project
 
 
-def run_experiment(project_name, target_name, args, output_path, errlog_path,
-                   build_output_path, upload_corpus_path, upload_coverage_path,
-                   experiment_name, upload_reproducer_path, tags,
-                   use_cached_image):
+def run_experiment(project_name,
+                   target_name,
+                   args,
+                   output_path,
+                   errlog_path,
+                   build_output_path,
+                   upload_corpus_path,
+                   upload_coverage_path,
+                   experiment_name,
+                   upload_reproducer_path,
+                   tags,
+                   use_cached_image,
+                   real_project_name=None):
   config = build_project.Config(testing=True,
                                 test_image_suffix='',
                                 repo=build_project.DEFAULT_OSS_FUZZ_REPO,
@@ -49,6 +58,11 @@ def run_experiment(project_name, target_name, args, output_path, errlog_path,
   project = build_project.Project(project_name, project_yaml,
                                   dockerfile_contents)
 
+  if real_project_name:
+    # If the passed project name is not the actual OSS-Fuzz project name (e.g.
+    # OSS-Fuzz-Gen generated benchmark), record the real one here.
+    project.real_name = real_project_name
+
   # Override sanitizers and engine because we only care about libFuzzer+ASan
   # for benchmarking purposes.
   build_project.set_yaml_defaults(project_yaml)
@@ -336,12 +350,19 @@ def main():
   parser.add_argument('--use_cached_image',
                       action='store_true',
                       help='Use cached images post build.')
+  parser.add_argument(
+      '--real_project',
+      required=False,
+      default='',
+      help=('The real OSS-Fuzz project name (e.g. if `--project` '
+            'is an autogenerated project name).'))
   args = parser.parse_args()
 
   run_experiment(args.project, args.target, args.args, args.upload_output_log,
                  args.upload_err_log, args.upload_build_log, args.upload_corpus,
                  args.upload_coverage, args.experiment_name,
-                 args.upload_reproducer, args.tags, args.use_cached_image)
+                 args.upload_reproducer, args.tags, args.use_cached_image,
+                 args.real_project)
 
 
 if __name__ == '__main__':