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This commit is contained in:
J. Nick Koston
2025-10-17 16:02:08 -10:00
parent 71f2fb8353
commit a45e94cd06
1 changed files with 30 additions and 4 deletions
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34
esphome/analyze_memory/__init__.py
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@@ -310,13 +310,27 @@ class MemoryAnalyzer:
"✗ Using system c++filt (objdump_path=%s)", self.objdump_path
)
# Strip GCC optimization suffixes before demangling
# Strip GCC optimization suffixes and prefixes before demangling
# Suffixes like $isra$0, $part$0, $constprop$0 confuse c++filt
# Prefixes like _GLOBAL__sub_I_ need to be removed and tracked
symbols_stripped = []
symbols_prefixes = [] # Track removed prefixes
for symbol in symbols:
# Remove GCC optimization markers
stripped = re.sub(r"\$(?:isra|part|constprop)\$\d+", "", symbol)
# Handle GCC global constructor/initializer prefixes
# _GLOBAL__sub_I_<mangled> -> extract <mangled> for demangling
prefix = ""
if stripped.startswith("_GLOBAL__sub_I_"):
prefix = "_GLOBAL__sub_I_"
stripped = stripped[len(prefix) :]
elif stripped.startswith("_GLOBAL__sub_D_"):
prefix = "_GLOBAL__sub_D_"
stripped = stripped[len(prefix) :]
symbols_stripped.append(stripped)
symbols_prefixes.append(prefix)
try:
# Send all symbols to c++filt at once
@@ -331,11 +345,23 @@ class MemoryAnalyzer:
demangled_lines = result.stdout.strip().split("\n")
# Map original to demangled names
failed_count = 0
for original, stripped, demangled in zip(
symbols, symbols_stripped, demangled_lines
for original, stripped, prefix, demangled in zip(
symbols, symbols_stripped, symbols_prefixes, demangled_lines
):
# Add back any prefix that was removed
if prefix:
if demangled != stripped:
# Successfully demangled - add descriptive prefix
if prefix == "_GLOBAL__sub_I_":
demangled = f"[global constructor for: {demangled}]"
elif prefix == "_GLOBAL__sub_D_":
demangled = f"[global destructor for: {demangled}]"
else:
# Failed to demangle - restore original prefix
demangled = prefix + demangled
# If we stripped a suffix, add it back to the demangled name for clarity
if original != stripped:
if original != stripped and not prefix:
# Find what was stripped
suffix_match = re.search(
r"(\$(?:isra|part|constprop)\$\d+)", original