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acbb491ab2
And add a check in the python script that the binary given to `--qemu` actually exists. Otherwise you get a generic Python error: ``` # .---command stderr------------ # | Traceback (most recent call last): # | File "/home/david.spickett/modules-llvm-project/libcxx/utils/qemu_baremetal.py", line 70, in <module> # | exit(main()) # | File "/home/david.spickett/modules-llvm-project/libcxx/utils/qemu_baremetal.py", line 66, in main # | os.execvp(qemu_commandline[0], qemu_commandline) # | File "/usr/lib/python3.8/os.py", line 568, in execvp # | _execvpe(file, args) # | File "/usr/lib/python3.8/os.py", line 610, in _execvpe # | raise last_exc # | File "/usr/lib/python3.8/os.py", line 601, in _execvpe # | exec_func(fullname, *argrest) # | FileNotFoundError: [Errno 2] No such file or directory # `----------------------------- # error: command failed with exit status: 1 ``` When it tries to run the entire command later. For the builder, it's only ever going to use qemu-system-arm so error at config time if it's not there.
77 lines
2.6 KiB
Python
Executable File
77 lines
2.6 KiB
Python
Executable File
#!/usr/bin/env python3
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# ===----------------------------------------------------------------------===##
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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# ===----------------------------------------------------------------------===##
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"""qemu_baremetal.py is a utility for running a program with QEMU's system mode.
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It is able to pass command line arguments to the program and forward input and
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output (if the underlying baremetal enviroment supports QEMU semihosting).
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"""
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import argparse
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import os
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import sys
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import shutil
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def main():
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parser = argparse.ArgumentParser()
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parser.add_argument("--qemu", type=str, required=True)
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parser.add_argument("--cpu", type=str, required=False)
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parser.add_argument("--machine", type=str, default="virt")
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parser.add_argument(
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"--qemu-arg", dest="qemu_args", type=str, action="append", default=[]
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)
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parser.add_argument("--semihosting", action="store_true", default=True)
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parser.add_argument("--no-semihosting", dest="semihosting", action="store_false")
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parser.add_argument("--execdir", type=str, required=True)
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parser.add_argument("test_binary")
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parser.add_argument("test_args", nargs=argparse.ZERO_OR_MORE, default=[])
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args = parser.parse_args()
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if not shutil.which(args.qemu):
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sys.exit(f"Failed to find QEMU binary from --qemu value: '{args.qemu}'")
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if not os.path.exists(args.test_binary):
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sys.exit(f"Expected argument to be a test executable: '{args.test_binary}'")
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qemu_commandline = [
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args.qemu,
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"-chardev",
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"stdio,mux=on,id=stdio0",
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"-monitor",
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"none",
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"-serial",
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"none",
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"-machine",
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f"{args.machine},accel=tcg",
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"-device",
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f"loader,file={args.test_binary},cpu-num=0",
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"-nographic",
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*args.qemu_args,
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]
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if args.cpu:
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qemu_commandline += ["-cpu", args.cpu]
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if args.semihosting:
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# Use QEMU's semihosting support to pass argv (supported by picolibc)
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semihosting_config = f"enable=on,chardev=stdio0,arg={args.test_binary}"
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for arg in args.test_args:
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semihosting_config += f",arg={arg}"
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qemu_commandline += ["-semihosting-config", semihosting_config]
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elif args.test_args:
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sys.exit(
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"Got non-empty test arguments but do no know how to pass them to "
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"QEMU without semihosting support"
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)
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os.execvp(qemu_commandline[0], qemu_commandline)
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if __name__ == "__main__":
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exit(main())
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