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#!/bin/sh
# Exit if anything fails
set -e
# Prefer rustc in the same directory as this script
DIR="$(dirname "$0")"
if [ -x "$DIR/rustc" ]; then
RUSTC="$DIR/rustc"
else
RUSTC="rustc"
fi
# Find out where the pretty printer Python module is
RUSTC_SYSROOT="$("$RUSTC" --print=sysroot)"
GDB_PYTHON_MODULE_DIRECTORY="$RUSTC_SYSROOT/lib/rustlib/etc"
# Get the commit hash for path remapping
RUSTC_COMMIT_HASH="$("$RUSTC" -vV | sed -n 's/commit-hash: \([a-zA-Z0-9_]*\)/\1/p')"
# Run GDB with the additional arguments that load the pretty printers
# Set the environment variable `RUST_GDB` to overwrite the call to a
# different/specific command (defaults to `gdb`).
RUST_GDB="${RUST_GDB:-gdb}"
PYTHONPATH="$PYTHONPATH:$GDB_PYTHON_MODULE_DIRECTORY" exec ${RUST_GDB} \
--directory="$GDB_PYTHON_MODULE_DIRECTORY" \
-iex "add-auto-load-safe-path $GDB_PYTHON_MODULE_DIRECTORY" \
-iex "set substitute-path /rustc/$RUSTC_COMMIT_HASH $RUSTC_SYSROOT/lib/rustlib/src/rust" \
"$@"
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