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32 changes: 32 additions & 0 deletions example/ios/Flutter/ephemeral/flutter_lldb_helper.py
Original file line number Diff line number Diff line change
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#
# Generated file, do not edit.
#

import lldb

def handle_new_rx_page(frame: lldb.SBFrame, bp_loc, extra_args, intern_dict):
"""Intercept NOTIFY_DEBUGGER_ABOUT_RX_PAGES and touch the pages."""
base = frame.register["x0"].GetValueAsAddress()
page_len = frame.register["x1"].GetValueAsUnsigned()

# Note: NOTIFY_DEBUGGER_ABOUT_RX_PAGES will check contents of the
# first page to see if handled it correctly. This makes diagnosing
# misconfiguration (e.g. missing breakpoint) easier.
data = bytearray(page_len)
data[0:8] = b'IHELPED!'

error = lldb.SBError()
frame.GetThread().GetProcess().WriteMemory(base, data, error)
if not error.Success():
print(f'Failed to write into {base}[+{page_len}]', error)
return

def __lldb_init_module(debugger: lldb.SBDebugger, _):
target = debugger.GetDummyTarget()
# Caveat: must use BreakpointCreateByRegEx here and not
# BreakpointCreateByName. For some reasons callback function does not
# get carried over from dummy target for the later.
bp = target.BreakpointCreateByRegex("^NOTIFY_DEBUGGER_ABOUT_RX_PAGES$")
bp.SetScriptCallbackFunction('{}.handle_new_rx_page'.format(__name__))
bp.SetAutoContinue(True)
print("-- LLDB integration loaded --")
5 changes: 5 additions & 0 deletions example/ios/Flutter/ephemeral/flutter_lldbinit
Original file line number Diff line number Diff line change
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#
# Generated file, do not edit.
#

command script import --relative-to-command-file flutter_lldb_helper.py
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