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ARROW-15423: [C++][Dev] Make GDB plugin auto-load friendly #12236

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ARROW-15423: [C++][Dev] Make GDB plugin auto-load friendly #12236

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16 changes: 15 additions & 1 deletion cpp/gdb_arrow.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1843,6 +1843,7 @@ def to_string(self):
"nonstd::sv_lite::basic_string_view": StringViewPrinter,
}


def arrow_pretty_print(val):
name = val.type.strip_typedefs().name
if name is None:
Expand Down Expand Up @@ -1891,4 +1892,17 @@ def arrow_pretty_print(val):
return ScalarPrinter(val)


gdb.pretty_printers.append(arrow_pretty_print)
def main():
# This pattern allows for two modes of use:
# - manual loading using `source gdb-arrow.py`: current_objfile()
# will be None;
# - automatic loading from the GDB `scripts-directory`: current_objfile()
# will be tied to the inferior being debugged.
objfile = gdb.current_objfile()
if objfile is None:
objfile = gdb

objfile.pretty_printers.append(arrow_pretty_print)


main()