2fb4fa3289
From the change:
// xtensa has more registers than an instruction can address. The 16 that
// can be addressed are called the "window". When a function is called or
// returns the window rotates. This allows for more efficient function calls
// because ram doesn't need to be used. It's only used if the window wraps
// around onto itself. At that point values are "spilled" to empty spots in
// the stack that were set aside. When the window rotates back around (on
// function return), the values are restored into the register from ram.
// So, in order to read the values in the stack scan we must make sure all
// of the register values we care about have been spilled to RAM. Luckily,
// there is a HAL call to do it. There is a bit of a race condition here
// because the register value could change after it's been restored but that
// is unlikely to happen with a heap pointer while we do a GC.
Fixes #2907
24 lines
704 B
Python
24 lines
704 B
Python
"""Simple script that translates "Backtrace:" lines from the ESP output to files
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and line numbers.
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Run with: python3 tools/decode_backtrace.py <board>
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Enter the backtrace line at the "? " prompt. CTRL-C to exit the script.
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"""
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import subprocess
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import sys
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board = sys.argv[1]
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print(board)
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while True:
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addresses = input("? ")
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if addresses.startswith("Backtrace:"):
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addresses = addresses[len("Backtrace:"):]
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addresses = addresses.strip().split()
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addresses = [address.split(":")[0] for address in addresses]
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print('got', addresses)
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subprocess.run(["xtensa-esp32s2-elf-addr2line",
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"-e", "build-{}/firmware.elf".format(board)] + addresses)
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