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BUG=b:244644217
TEST=None

Change-Id: I15ee49233d98fb6295c0c53c129bbf8e78e0d9ff
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/3877337
Tested-by: George Burgess <gbiv@chromium.org>
Reviewed-by: Jordan Abrahams-Whitehead <ajordanr@google.com>
Commit-Queue: George Burgess <gbiv@chromium.org>

1 files changed, 40 insertions, 38 deletions

diff --git a/debug_info_test/check_icf.py b/debug_info_test/check_icf.py
index a79d5e80..5e92ec13 100644
--- a/debug_info_test/check_icf.py
+++ b/debug_info_test/check_icf.py
@@ -13,41 +13,43 @@ import subprocess
 
 
 def check_identical_code_folding(dso_path):
-  """check whether chrome was built with identical code folding.
-
-  Args:
-    dso_path: path to the dso.
-
-  Returns:
-    False if the dso is chrome and it was not built with icf,
-    True otherwise.
-  """
-
-  if not dso_path.endswith('/chrome.debug'):
-    return True
-
-  # Run 'nm' on the chrome binary and read the output.
-  nm = subprocess.Popen(['nm', dso_path],
-                        stdout=subprocess.PIPE,
-                        stderr=open(os.devnull, 'w'),
-                        encoding='utf-8')
-  nm_output, _ = nm.communicate()
-
-  # Search for addresses of text symbols.
-  text_addresses = re.findall('^[0-9a-f]+[ ]+[tT] ', nm_output, re.MULTILINE)
-
-  # Calculate number of text symbols in chrome binary.
-  num_text_addresses = len(text_addresses)
-
-  # Calculate number of unique text symbols in chrome binary.
-  num_unique_text_addresses = len(set(text_addresses))
-
-  # Check that the number of duplicate symbols is at least 10,000.
-  #   - https://crbug.com/813272#c18
-  if num_text_addresses - num_unique_text_addresses >= 10000:
-    return True
-
-  print('%s was not built with ICF' % dso_path)
-  print('    num_text_addresses = %d' % num_text_addresses)
-  print('    num_unique_text_addresses = %d' % num_unique_text_addresses)
-  return False
+    """check whether chrome was built with identical code folding.
+
+    Args:
+      dso_path: path to the dso.
+
+    Returns:
+      False if the dso is chrome and it was not built with icf,
+      True otherwise.
+    """
+
+    if not dso_path.endswith("/chrome.debug"):
+        return True
+
+    # Run 'nm' on the chrome binary and read the output.
+    nm = subprocess.Popen(
+        ["nm", dso_path],
+        stdout=subprocess.PIPE,
+        stderr=open(os.devnull, "w"),
+        encoding="utf-8",
+    )
+    nm_output, _ = nm.communicate()
+
+    # Search for addresses of text symbols.
+    text_addresses = re.findall("^[0-9a-f]+[ ]+[tT] ", nm_output, re.MULTILINE)
+
+    # Calculate number of text symbols in chrome binary.
+    num_text_addresses = len(text_addresses)
+
+    # Calculate number of unique text symbols in chrome binary.
+    num_unique_text_addresses = len(set(text_addresses))
+
+    # Check that the number of duplicate symbols is at least 10,000.
+    #   - https://crbug.com/813272#c18
+    if num_text_addresses - num_unique_text_addresses >= 10000:
+        return True
+
+    print("%s was not built with ICF" % dso_path)
+    print("    num_text_addresses = %d" % num_text_addresses)
+    print("    num_unique_text_addresses = %d" % num_unique_text_addresses)
+    return False