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#!/usr/bin/python
import os
import testlib
import unittest
import tempfile
import time
class DebugTest(unittest.TestCase):
def setUp(self):
self.binary = testlib.compile("debug.c")
self.spike = testlib.spike(self.binary, halted=False)
self.gdb = testlib.Gdb()
self.gdb.command("file %s" % self.binary)
self.gdb.command("target extended-remote localhost:9824")
self.gdb.command("p i=0");
def tearDown(self):
self.spike.kill()
self.spike.wait()
def test_turbostep(self):
"""Single step a bunch of times."""
last_pc = None
for _ in range(100):
self.gdb.command("stepi")
pc = self.gdb.command("p $pc")
self.assertNotEqual(last_pc, pc)
last_pc = pc
def test_exit(self):
output = self.gdb.command("c")
self.assertIn("Continuing", output)
self.assertIn("Remote connection closed", output)
def test_breakpoint(self):
self.gdb.command("b print_row")
# The breakpoint should be hit exactly 10 times.
for _ in range(10):
output = self.gdb.command("c")
self.assertIn("Continuing", output)
self.assertIn("Breakpoint 1", output)
output = self.gdb.command("c")
self.assertIn("Continuing", output)
self.assertIn("Remote connection closed", output)
def test_registers(self):
output = self.gdb.command("info all-registers")
self.assertNotIn("Could not", output)
for reg in ('zero', 'ra', 'sp', 'gp', 'tp'):
self.assertIn(reg, output)
# mcpuid is one of the few registers that should have the high bit set
# (for rv64).
self.assertRegexpMatches(output, ".*mcpuid *0x80")
# The time register should always be changing.
last_time = None
for _ in range(5):
time = self.gdb.p("$time")
self.assertNotEqual(time, last_time)
last_time = time
self.gdb.command("stepi")
class RegsTest(unittest.TestCase):
def setUp(self):
self.binary = testlib.compile("regs.s")
self.spike = testlib.spike(self.binary, halted=False)
self.gdb = testlib.Gdb()
self.gdb.command("file %s" % self.binary)
self.gdb.command("target extended-remote localhost:9824")
def tearDown(self):
self.spike.kill()
self.spike.wait()
def test_write_gprs(self):
# Note a0 is missing from this list since it's used to hold the
# address.
regs = ("ra", "sp", "gp", "tp", "t0", "t1", "t2", "fp", "s1",
"a1", "a2", "a3", "a4", "a5", "a6", "a7", "s2", "s3", "s4",
"s5", "s6", "s7", "s8", "s9", "s10", "s11", "t3", "t4", "t5",
"t6")
self.gdb.command("p $pc=write_regs")
for i, r in enumerate(regs):
self.gdb.command("p $%s=%d" % (r, i*0xdeadbeef+17))
self.gdb.command("p $a0=data")
self.gdb.command("b all_done")
output = self.gdb.command("c")
self.assertIn("Breakpoint 1", output)
for n in range(len(regs)):
self.assertEqual(self.gdb.x("data+%d" % (8*n), 'g'),
n*0xdeadbeef+17)
def test_write_csrs(self):
# As much a test of gdb as of the simulator.
self.gdb.p("$mscratch=0")
self.gdb.stepi()
self.assertEqual(self.gdb.p("$mscratch"), 0)
self.gdb.p("$mscratch=123")
self.gdb.stepi()
self.assertEqual(self.gdb.p("$mscratch"), 123)
if __name__ == '__main__':
unittest.main()
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