[libfuzzer] Add custom max_len parameter for boringssl fuzzers.

R=aizatsky@chromium.org, davidben@chromium.org, ochang@chromium.org
BUG=569578

Review-Url: https://codereview.chromium.org/1885493002
Cr-Commit-Position: refs/heads/master@{#390340}

testing/libfuzzer/archive_corpus.py

@@ -18,23 +18,17 @@
 
 def main():
   parser = argparse.ArgumentParser(description="Generate fuzzer config.")
-  parser.add_argument('--depfile', required=True)
   parser.add_argument('--corpus', required=True)
   parser.add_argument('--output', required=True)
   parser.add_argument('--fuzzer', required=True)
   args = parser.parse_args()
 
   corpus_files = []
-  # Generate .d file with dependency from corpus archive to individual files.
-  with open(args.depfile, 'w') as depfile:
-      print(os.path.basename(args.output), ":", end="", file=depfile)
-      for (dirpath, _, filenames) in os.walk(args.corpus):
-          for filename in filenames:
-              full_filename = os.path.join(dirpath, filename)
-              print(" ", full_filename, end="", file=depfile)
-              corpus_files.append(full_filename)
-      # chrome bots complain about this one:
-      # print(" ", args.fuzzer, end="", file=depfile)
+
+  for (dirpath, _, filenames) in os.walk(args.corpus):
+    for filename in filenames:
+      full_filename = os.path.join(dirpath, filename)
+      corpus_files.append(full_filename)
 
   with zipfile.ZipFile(args.output, 'w') as z:
     for corpus_file in corpus_files:
@@ -43,4 +37,3 @@ def main():
 
 if __name__ == '__main__':
   main()
-

testing/libfuzzer/fuzzer_test.gni

@@ -37,14 +37,11 @@ template("fuzzer_test") {
     }
 
     if (defined(invoker.seed_corpus)) {
-      depfile = "$root_build_dir/$target_name" + ".seed_corpus.d"
       out = "$root_build_dir/$target_name" + "_seed_corpus.zip"
 
       action(target_name + "_seed_corpus") {
         script = "//testing/libfuzzer/archive_corpus.py"
         args = [
-          "--depfile",
-          rebase_path(depfile),
           "--corpus",
           rebase_path(invoker.seed_corpus),
           "--output",
@@ -53,7 +50,6 @@ template("fuzzer_test") {
           rebase_path("$root_build_dir/$target_name"),
         ]
 
-        depfile = depfile
         outputs = [
           out,
         ]

third_party/boringssl/BUILD.gn

@@ -178,6 +178,16 @@ if (build_with_chromium) {
         ":boringssl_fuzzer",
       ]
       seed_corpus = "src/fuzz/${fuzzer}_corpus"
+
+      if ("cert" == fuzzer) {
+        libfuzzer_options = [ "max_len=3072" ]
+      } else if ("client" == fuzzer) {
+        libfuzzer_options = [ "max_len=20000" ]
+      } else if ("privkey" == fuzzer) {
+        libfuzzer_options = [ "max_len=2048" ]
+      } else if ("server" == fuzzer) {
+        libfuzzer_options = [ "max_len=4096" ]
+      }
     }
   }
 }