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https://github.com/lutris/lutris
synced 2024-09-15 22:09:55 +00:00
Factor out the syscall number getting from _get_futex_syscall_nr into a new function.
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@ -73,6 +73,60 @@ class timespec(ctypes.Structure):
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]
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def _get_syscall_nr_from_headers(syscall_name):
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bits = ctypes.sizeof(ctypes.c_void_p) * 8
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try:
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with subprocess.Popen(
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("cpp", "-m" + str(bits), "-E", "-P", "-x", "c", "-"),
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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close_fds=True,
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universal_newlines=True,
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) as popen:
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stdout, stderr = popen.communicate(
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"#include <sys/syscall.h>\n"
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"__NR_" + syscall_name + "\n"
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)
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except FileNotFoundError as ex:
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raise RuntimeError(
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"failed to determine " + syscall_name + " syscall number: "
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"cpp not installed or not in PATH"
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) from ex
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if popen.returncode:
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raise RuntimeError(
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"failed to determine " + syscall_name + " syscall number: "
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"cpp returned nonzero exit code",
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stderr
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)
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if not stdout:
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raise RuntimeError(
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"failed to determine " + syscall_name + " syscall number: "
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"no output from cpp"
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)
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last_line = stdout.splitlines()[-1]
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if last_line == "__NR_futex":
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raise RuntimeError(
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"failed to determine " + syscall_name + " syscall number: "
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"__NR_" + syscall_name + " not expanded"
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)
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try:
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return int(last_line)
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except ValueError as ex:
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raise RuntimeError(
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"failed to determine " + syscall_name + " syscall number: "
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"__NR_" + syscall_name + " not a valid number: " + last_line
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) from ex
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assert False
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# Hardcode some of the most commonly used architectures's
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# futex syscall numbers.
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_NR_FUTEX_PER_ARCH = {
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@ -103,55 +157,7 @@ def _get_futex_syscall_nr():
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except KeyError:
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pass
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try:
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with subprocess.Popen(
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("cpp", "-m" + str(bits), "-E", "-P", "-x", "c", "-"),
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE,
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close_fds=True,
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universal_newlines=True,
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) as popen:
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stdout, stderr = popen.communicate(
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"#include <sys/syscall.h>\n"
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"__NR_futex\n"
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)
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except FileNotFoundError as ex:
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raise RuntimeError(
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"failed to determine futex syscall number: "
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"cpp not installed or not in PATH"
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) from ex
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if popen.returncode:
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raise RuntimeError(
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"failed to determine futex syscall number: "
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"cpp returned nonzero exit code",
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stderr
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)
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if not stdout:
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raise RuntimeError(
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"failed to determine futex syscall number: "
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"no output from cpp"
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)
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last_line = stdout.splitlines()[-1]
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if last_line == "__NR_futex":
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raise RuntimeError(
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"failed to determine futex syscall number: "
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"__NR_futex not expanded"
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)
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try:
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return int(last_line)
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except ValueError as ex:
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raise RuntimeError(
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"failed to determine futex syscall number: "
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"__NR_futex not a valid number: " + last_line
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) from ex
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assert False
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return _get_syscall_nr_from_headers('futex')
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def _is_ctypes_obj(obj):
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