mirror of https://github.com/proxmox/mirror_qemu
61 lines
2.0 KiB
Python
61 lines
2.0 KiB
Python
from __future__ import print_function
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#
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# Test some of the system debug features with the multiarch memory
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# test. It is a port of the original vmlinux focused test case but
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# using the "memory" test instead.
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#
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# This is launched via tests/guest-debug/run-test.py
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#
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import gdb
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from test_gdbstub import main, report
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def check_interrupt(thread):
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"""
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Check that, if thread is resumed, we go back to the same thread when the
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program gets interrupted.
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"""
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# Switch to the thread we're going to be running the test in.
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print("thread ", thread.num)
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gdb.execute("thr %d" % thread.num)
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# Enter the loop() function on this thread.
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#
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# While there are cleaner ways to do this, we want to minimize the number of
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# side effects on the gdbstub's internal state, since those may mask bugs.
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# Ideally, there should be no difference between what we're doing here and
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# the program reaching the loop() function on its own.
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#
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# For this to be safe, we only need the prologue of loop() to not have
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# instructions that may have problems with what we're doing here. We don't
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# have to worry about anything else, as this function never returns.
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gdb.execute("set $pc = loop")
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# Continue and then interrupt the task.
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gdb.post_event(lambda: gdb.execute("interrupt"))
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gdb.execute("c")
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# Check whether the thread we're in after the interruption is the same we
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# ran continue from.
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return (thread.num == gdb.selected_thread().num)
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def run_test():
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"""
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Test if interrupting the code always lands us on the same thread when
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running with scheduler-lock enabled.
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"""
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if len(gdb.selected_inferior().threads()) == 1:
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print("SKIP: set to run on a single thread")
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exit(0)
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gdb.execute("set scheduler-locking on")
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for thread in gdb.selected_inferior().threads():
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report(check_interrupt(thread),
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"thread %d resumes correctly on interrupt" % thread.num)
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main(run_test)
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