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[esp8266] Decode crash handler PC and backtrace in logs (#16911)

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This commit is contained in:
J. Nick Koston
2026-06-11 08:47:50 -05:00
committed by GitHub
parent a56b6d8993
commit 750cf1995b
2 changed files with 47 additions and 1 deletions
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esphome/components/esp8266/__init__.py
+17 -1
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@@ -492,6 +492,15 @@ def _parse_register(config, regex, line):
STACKTRACE_ESP8266_EXCEPTION_TYPE_RE = re.compile(r"[eE]xception \((\d+)\):")
STACKTRACE_ESP8266_PC_RE = re.compile(r"epc1=0x(4[0-9a-fA-F]{7})")
STACKTRACE_ESP8266_EXCVADDR_RE = re.compile(r"excvaddr=0x(4[0-9a-fA-F]{7})")
# Structured crash handler output (crash_handler.cpp) from a previous boot:
# PC: 0x40220060
# EXCVADDR: 0x0000008A
# BT0: 0x40212345
STACKTRACE_ESP8266_CRASH_PC_RE = re.compile(r".*PC\s*:\s*(?:0x)?(4[0-9a-fA-F]{7})")
STACKTRACE_ESP8266_CRASH_EXCVADDR_RE = re.compile(
r".*EXCVADDR\s*:\s*(?:0x)?(4[0-9a-fA-F]{7})"
)
STACKTRACE_ESP8266_CRASH_BT_RE = re.compile(r"BT\d+:\s*0x([0-9a-fA-F]{8})")
STACKTRACE_BAD_ALLOC_RE = re.compile(
r"^last failed alloc call: (4[0-9a-fA-F]{7})\((\d+)\)$"
)
@@ -508,10 +517,17 @@ def process_stacktrace(config, line, backtrace_state):
"Exception type: %s", ESP8266_EXCEPTION_CODES.get(code, "unknown")
)
# ESP8266 PC/EXCVADDR
# ESP8266 PC/EXCVADDR (legacy Arduino postmortem)
_parse_register(config, STACKTRACE_ESP8266_PC_RE, line)
_parse_register(config, STACKTRACE_ESP8266_EXCVADDR_RE, line)
# ESP8266 structured crash handler (crash_handler.cpp) from previous boot
_parse_register(config, STACKTRACE_ESP8266_CRASH_PC_RE, line)
_parse_register(config, STACKTRACE_ESP8266_CRASH_EXCVADDR_RE, line)
match = re.search(STACKTRACE_ESP8266_CRASH_BT_RE, line)
if match is not None:
_decode_pc(config, match.group(1))
# bad alloc
match = re.match(STACKTRACE_BAD_ALLOC_RE, line)
if match is not None: