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llvm-project/lldb/test/API/functionalities/scripted_frame_provider/python_helper.py
Med Ismail Bennani 96c733e0db [lldb] Add support for PC-less scripted frames (#170805)
Scripted frames that materialize Python functions or other non-native
code are PC-less by design, meaning they don't have valid program
counter values. Previously, these frames would display invalid addresses
(`0xffffffffffffffff`) in backtrace output.

This patch updates `FormatEntity` to detect and suppress invalid address
display for PC-less frames, adds fallback to frame methods when symbol
context is unavailable, and modifies `StackFrame::GetSymbolContext` to
skip PC-based symbol resolution for invalid addresses.

The changes enable PC-less frames to display cleanly with proper
function names, file paths, and line numbers, and allow for source
display of foreign sources (like Python). Includes comprehensive test
coverage demonstrating frames pointing to Python source files.

Signed-off-by: Med Ismail Bennani <ismail@bennani.ma>
2025-12-05 23:57:54 +00:00

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777 B
Python

"""
Sample Python module to demonstrate Python source display in scripted frames.
"""
def compute_fibonacci(n):
"""Compute the nth Fibonacci number."""
if n <= 1:
return n
a, b = 0, 1
for _ in range(n - 1):
a, b = b, a + b
return b
def process_data(data):
"""Process some data and return result."""
result = []
for item in data:
if isinstance(item, int):
result.append(item * 2)
elif isinstance(item, str):
result.append(item.upper())
return result
def main():
"""Main entry point for testing."""
fib_10 = compute_fibonacci(10)
data = [1, 2, "hello", 3, "world"]
processed = process_data(data)
return fib_10, processed
if __name__ == "__main__":
main()