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test_percpu.py
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104 lines (89 loc) · 4.02 KB
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# -*- coding: utf-8 -*-
# vim:set shiftwidth=4 softtabstop=4 expandtab textwidth=79:
import unittest
import gdb
import crash
import crash.types.percpu as percpu
class TestPerCPU(unittest.TestCase):
def setUp(self):
gdb.execute("file tests/test-percpu", to_string=True)
try:
gdb.execute("set build-id-verbose 0")
print()
print("--- Unsuppressable gdb output ---", end='')
gdb.execute("run", to_string=False)
msym = gdb.lookup_minimal_symbol('__per_cpu_load')
self.baseaddr = msym.value().address
self.test_struct = gdb.lookup_type("struct test_struct")
self.ulong_type = gdb.lookup_type("long unsigned int")
self.voidp = gdb.lookup_type("void").pointer()
except gdb.error as e:
# If we don't tear it down, the rest of the tests in
# other files will fail due to it using the wrong core file
self.tearDown()
raise(e)
def tearDown(self):
try:
gdb.execute("detach", to_string=True)
gdb.execute("file")
except gdb.error:
print()
pass
print("--- End gdb output ---")
def test_struct_test(self):
var = gdb.lookup_symbol('struct_test', None)[0]
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val['x'] == cpu)
self.assertTrue(val.type == self.test_struct)
def test_ulong_test(self):
var = gdb.lookup_symbol('ulong_test', None)[0]
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val == cpu)
self.assertTrue(val.type == self.ulong_type)
def test_ulong_ptr_test(self):
var = gdb.lookup_symbol('ptr_to_ulong_test', None)[0]
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val.type == self.ulong_type.pointer())
self.assertTrue(val.dereference() == cpu)
def test_voidp_test(self):
var = gdb.lookup_symbol('voidp_test', None)[0]
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val is not None)
self.assertTrue(val.type == self.voidp)
self.assertTrue(int(val) == 0xdeadbeef)
def test_struct_test_ptr(self):
var = gdb.lookup_symbol('ptr_to_struct_test', None)[0]
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val['x'] == cpu)
self.assertTrue(val.type == self.test_struct.pointer())
# This is a saved pointer to an unbound percpu var
def test_percpu_ptr_sym(self):
var = gdb.lookup_symbol('percpu_test', None)[0]
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val.type == self.test_struct)
# This is a pointer to an unbound percpu var
def test_percpu_ptr_val(self):
var = gdb.lookup_symbol('percpu_test', None)[0].value()
self.assertTrue(var is not None)
for cpu, val in list(percpu.get_percpu_vars(var).items()):
self.assertTrue(val.type == self.test_struct)
# This is a saved pointer to an bound percpu var (e.g. normal ptr)
def test_non_percpu_sym(self):
var = gdb.lookup_symbol('non_percpu_test', None)[0]
self.assertTrue(var is not None)
with self.assertRaises(TypeError):
x = percpu.get_percpu_var(var, 0)
self.assertTrue(var.value()['x'] == 0)
# This is a pointer to an bound percpu var (e.g. normal ptr)
def test_non_percpu_ptr(self):
var = gdb.lookup_symbol('non_percpu_test', None)[0].value()
self.assertTrue(var is not None)
with self.assertRaises(TypeError):
x = percpu.get_percpu_var(var, 0)
self.assertTrue(var['x'] == 0)