forked from mirror/qemu
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
131 lines
3.1 KiB
Python
131 lines
3.1 KiB
Python
from __future__ import print_function
|
|
#
|
|
# Test some of the softmmu debug features with the multiarch memory
|
|
# test. It is a port of the original vmlinux focused test case but
|
|
# using the "memory" test instead.
|
|
#
|
|
# This is launched via tests/guest-debug/run-test.py
|
|
#
|
|
|
|
import gdb
|
|
import sys
|
|
|
|
failcount = 0
|
|
|
|
|
|
def report(cond, msg):
|
|
"Report success/fail of test"
|
|
if cond:
|
|
print("PASS: %s" % (msg))
|
|
else:
|
|
print("FAIL: %s" % (msg))
|
|
global failcount
|
|
failcount += 1
|
|
|
|
|
|
def check_step():
|
|
"Step an instruction, check it moved."
|
|
start_pc = gdb.parse_and_eval('$pc')
|
|
gdb.execute("si")
|
|
end_pc = gdb.parse_and_eval('$pc')
|
|
|
|
return not (start_pc == end_pc)
|
|
|
|
|
|
#
|
|
# Currently it's hard to create a hbreak with the pure python API and
|
|
# manually matching PC to symbol address is a bit flaky thanks to
|
|
# function prologues. However internally QEMU's gdbstub treats them
|
|
# the same as normal breakpoints so it will do for now.
|
|
#
|
|
def check_break(sym_name):
|
|
"Setup breakpoint, continue and check we stopped."
|
|
sym, ok = gdb.lookup_symbol(sym_name)
|
|
bp = gdb.Breakpoint(sym_name, gdb.BP_BREAKPOINT)
|
|
|
|
gdb.execute("c")
|
|
|
|
# hopefully we came back
|
|
end_pc = gdb.parse_and_eval('$pc')
|
|
report(bp.hit_count == 1,
|
|
"break @ %s (%s %d hits)" % (end_pc, sym.value(), bp.hit_count))
|
|
|
|
bp.delete()
|
|
|
|
|
|
def do_one_watch(sym, wtype, text):
|
|
|
|
wp = gdb.Breakpoint(sym, gdb.BP_WATCHPOINT, wtype)
|
|
gdb.execute("c")
|
|
report_str = "%s for %s" % (text, sym)
|
|
|
|
if wp.hit_count > 0:
|
|
report(True, report_str)
|
|
wp.delete()
|
|
else:
|
|
report(False, report_str)
|
|
|
|
|
|
def check_watches(sym_name):
|
|
"Watch a symbol for any access."
|
|
|
|
# Should hit for any read
|
|
do_one_watch(sym_name, gdb.WP_ACCESS, "awatch")
|
|
|
|
# Again should hit for reads
|
|
do_one_watch(sym_name, gdb.WP_READ, "rwatch")
|
|
|
|
# Finally when it is written
|
|
do_one_watch(sym_name, gdb.WP_WRITE, "watch")
|
|
|
|
|
|
def run_test():
|
|
"Run through the tests one by one"
|
|
|
|
print("Checking we can step the first few instructions")
|
|
step_ok = 0
|
|
for i in range(3):
|
|
if check_step():
|
|
step_ok += 1
|
|
|
|
report(step_ok == 3, "single step in boot code")
|
|
|
|
# If we get here we have missed some of the other breakpoints.
|
|
print("Setup catch-all for _exit")
|
|
cbp = gdb.Breakpoint("_exit", gdb.BP_BREAKPOINT)
|
|
|
|
check_break("main")
|
|
check_watches("test_data[128]")
|
|
|
|
report(cbp.hit_count == 0, "didn't reach backstop")
|
|
|
|
#
|
|
# This runs as the script it sourced (via -x, via run-test.py)
|
|
#
|
|
try:
|
|
inferior = gdb.selected_inferior()
|
|
arch = inferior.architecture()
|
|
print("ATTACHED: %s" % arch.name())
|
|
except (gdb.error, AttributeError):
|
|
print("SKIPPING (not connected)", file=sys.stderr)
|
|
exit(0)
|
|
|
|
if gdb.parse_and_eval('$pc') == 0:
|
|
print("SKIP: PC not set")
|
|
exit(0)
|
|
|
|
try:
|
|
# These are not very useful in scripts
|
|
gdb.execute("set pagination off")
|
|
|
|
# Run the actual tests
|
|
run_test()
|
|
except (gdb.error):
|
|
print("GDB Exception: %s" % (sys.exc_info()[0]))
|
|
failcount += 1
|
|
pass
|
|
|
|
# Finally kill the inferior and exit gdb with a count of failures
|
|
gdb.execute("kill")
|
|
exit(failcount)
|