1import os
2
3import infra.basetest
4
5
6class TestTraceCmd(infra.basetest.BRTest):
7    # A specific configuration is needed for testing trace-cmd.
8    # The function tracer need to be enabled in the Kernel.
9    kern_fragment = \
10        infra.filepath("tests/package/test_trace_cmd/linux-ftrace.fragment")
11    config = \
12        f"""
13        BR2_aarch64=y
14        BR2_TOOLCHAIN_EXTERNAL=y
15        BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
16        BR2_LINUX_KERNEL=y
17        BR2_LINUX_KERNEL_CUSTOM_VERSION=y
18        BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.1.74"
19        BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
20        BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/aarch64-virt/linux.config"
21        BR2_LINUX_KERNEL_CONFIG_FRAGMENT_FILES="{kern_fragment}"
22        BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
23        BR2_PACKAGE_TRACE_CMD=y
24        BR2_TARGET_ROOTFS_CPIO=y
25        BR2_TARGET_ROOTFS_CPIO_GZIP=y
26        # BR2_TARGET_ROOTFS_TAR is not set
27        """
28
29    def test_run(self):
30        img = os.path.join(self.builddir, "images", "rootfs.cpio.gz")
31        kern = os.path.join(self.builddir, "images", "Image")
32        self.emulator.boot(arch="aarch64",
33                           kernel=kern,
34                           kernel_cmdline=["console=ttyAMA0"],
35                           options=["-M", "virt",
36                                    "-cpu", "cortex-a57",
37                                    "-m", "256M",
38                                    "-initrd", img])
39        self.emulator.login()
40
41        # Record calls to kmalloc() from a simple command.
42        self.assertRunOk("trace-cmd record -e kmalloc ls -l /")
43
44        # Show information about the trace.dat file.
45        self.assertRunOk("trace-cmd dump")
46
47        # Generate a text report of the trace.
48        self.assertRunOk("trace-cmd report > trace.txt")
49
50        # Check we have occurrences of "kmalloc:" in the trace report.
51        cmd = "grep -Fc kmalloc: trace.txt"
52        output, exit_code = self.emulator.run(cmd)
53        self.assertEqual(exit_code, 0)
54        self.assertTrue(int(output[0]) > 0)
55