dump_guest_core:qemu dump new cases development

    1.Use gdb check core dump file
    2.Use crash check vmcore file

Signed-off-by: Leidong Wang <leidwang@redhat.com>

qemu/tests/cfg/dump_guest_core.cfg

@@ -0,0 +1,22 @@
+- dump_guest_core:
+    type = dump_guest_core
+    virt_test_type = qemu
+    pre_command = "ulimit -c unlimited"
+    core_file = "/var/core."
+    pre_command += "&& echo "${core_file}%p" > /proc/sys/kernel/core_pattern"
+    trigger_core_dump_command = "kill -s SIGSEGV %s"
+    gdb_command_file = "/home/gdb_command"
+    crash_script = "/home/crash.cmd"
+    vmcore_file = "/tmp/vmcore"
+    gdb_command = "gdb ${core_file}%s --command=${gdb_command_file}"
+    crash_cmd = "crash -i ${crash_script} /usr/lib/debug/lib/modules/%s/vmlinux ${vmcore_file}"
+    dump_guest_memory_file = "/usr/share/qemu-kvm/dump-guest-memory.py"
+    x86_64:
+        extra_params += " -device vmcoreinfo"
+    # When 'dump-guest-core=off' is specified, guest memory is omitted from the core dump.
+    variants:
+        - on:
+            dump_guest_core = on
+        - off:
+            dump_guest_core = off
+    extra_params += " -machine dump-guest-core=${dump_guest_core}"

qemu/tests/dump_guest_core.py

@@ -0,0 +1,101 @@
+import logging
+import os
+
+from avocado.utils import process
+
+from virttest import utils_package
+from virttest import utils_misc
+
+
+def run(test, params, env):
+    """
+    Test dump-guest-core, this case will:
+
+    1) Start VM with dump-guest-core option.
+    2) Check host env.
+    3) Trigger a core dump in host.
+    4) Use gdb to check core dump file.
+    5) If dump-guest-core=on, use crash to check vmcore file
+
+    :param test: QEMU test object
+    :param params: Dictionary with the test parameters
+    :param env: Dictionary with test environmen.
+    """
+
+    def check_env():
+        """
+        Check if host kernel version is same with guest
+        """
+        guest_kernel_version = session.cmd("uname -r").strip()
+        if host_kernel_version != guest_kernel_version:
+            test.cancel("Please update your host and guest kernel "
+                        "to same version.The host kernel version is %s"
+                        "The guest kernel version is %s"
+                        % (host_kernel_version, guest_kernel_version))
+
+    def check_core_file():
+        """
+        Use gdb to check core dump file
+        """
+        arch = 'X86_64'
+        arch = 'ppc64-le' if params['vm_arch_name'] == 'ppc64le' else arch
+        command = ('echo -e "source %s\nset height 0\ndump-guest-memory'
+                   ' %s %s\nbt\nquit" > %s' % (dump_guest_memory_file,
+                                               vmcore_file, arch,
+                                               gdb_command_file))
+        process.run(command, shell=True)
+        status, output = process.getstatusoutput(gdb_command, timeout=360)
+        os.remove(gdb_command_file)
+        os.remove(core_file)
+        logging.debug(output)
+        if status != 0:
+            test.fail("gdb command execute failed")
+        elif "<class 'gdb.MemoryError'>" in output:
+            if dump_guest_core == "on":
+                test.fail("Cannot access memory")
+
+    def check_vmcore_file():
+        """
+        Use crash to check vmcore file
+        """
+        process.run('echo -e "bt\ntask 0\ntask 1\nquit" > %s'
+                    % crash_script, shell=True)
+        output = process.getoutput(crash_cmd, timeout=60)
+        os.remove(crash_script)
+        os.remove(vmcore_file)
+        logging.debug(output)
+        if "systemd" in output and 'swapper' in output:
+            logging.info("Crash command works as expected")
+        else:
+            test.fail("Vmcore corrupt")
+
+    # install crash/gdb/kernel-debuginfo in host
+    packages = ["crash", "gdb", "kernel-debuginfo*", "qemu-kvm-debuginfo",
+                "qemu-kvm-debugsource", "qemu-kvm-core-debuginfo"]
+    utils_package.package_install(packages)
+
+    trigger_core_dump_command = params["trigger_core_dump_command"]
+    core_file = params["core_file"]
+    dump_guest_memory_file = params["dump_guest_memory_file"]
+    gdb_command = params["gdb_command"]
+    gdb_command_file = params["gdb_command_file"]
+    dump_guest_core = params["dump_guest_core"]
+    crash_script = params["crash_script"]
+    crash_cmd = params["crash_cmd"]
+    vmcore_file = params["vmcore_file"]
+    host_kernel_version = process.getoutput("uname -r").strip()
+    vm = env.get_vm(params["main_vm"])
+    session = vm.wait_for_login()
+    check_env()
+
+    qemu_id = vm.get_pid()
+    core_file += str(qemu_id)
+    gdb_command %= str(qemu_id)
+    trigger_core_dump_command %= str(qemu_id)
+    logging.info("trigger core dump command: %s" % trigger_core_dump_command)
+    process.run(trigger_core_dump_command)
+    utils_misc.wait_for(lambda: os.path.exists(core_file), timeout=60)
+    check_core_file()
+    if dump_guest_core == 'on':
+        crash_cmd %= host_kernel_version
+        check_vmcore_file()

venv/bin/Activate.ps1

@@ -0,0 +1,241 @@
+<#
+.Synopsis
+Activate a Python virtual environment for the current PowerShell session.
+
+.Description
+Pushes the python executable for a virtual environment to the front of the
+$Env:PATH environment variable and sets the prompt to signify that you are
+in a Python virtual environment. Makes use of the command line switches as
+well as the `pyvenv.cfg` file values present in the virtual environment.
+
+.Parameter VenvDir
+Path to the directory that contains the virtual environment to activate. The
+default value for this is the parent of the directory that the Activate.ps1
+script is located within.
+
+.Parameter Prompt
+The prompt prefix to display when this virtual environment is activated. By
+default, this prompt is the name of the virtual environment folder (VenvDir)
+surrounded by parentheses and followed by a single space (ie. '(.venv) ').
+
+.Example
+Activate.ps1
+Activates the Python virtual environment that contains the Activate.ps1 script.
+
+.Example
+Activate.ps1 -Verbose
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and shows extra information about the activation as it executes.
+
+.Example
+Activate.ps1 -VenvDir C:\Users\MyUser\Common\.venv
+Activates the Python virtual environment located in the specified location.
+
+.Example
+Activate.ps1 -Prompt "MyPython"
+Activates the Python virtual environment that contains the Activate.ps1 script,
+and prefixes the current prompt with the specified string (surrounded in
+parentheses) while the virtual environment is active.
+
+.Notes
+On Windows, it may be required to enable this Activate.ps1 script by setting the
+execution policy for the user. You can do this by issuing the following PowerShell
+command:
+
+PS C:\> Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser
+
+For more information on Execution Policies: 
+https://go.microsoft.com/fwlink/?LinkID=135170
+
+#>
+Param(
+    [Parameter(Mandatory = $false)]
+    [String]
+    $VenvDir,
+    [Parameter(Mandatory = $false)]
+    [String]
+    $Prompt
+)
+
+<# Function declarations --------------------------------------------------- #>
+
+<#
+.Synopsis
+Remove all shell session elements added by the Activate script, including the
+addition of the virtual environment's Python executable from the beginning of
+the PATH variable.
+
+.Parameter NonDestructive
+If present, do not remove this function from the global namespace for the
+session.
+
+#>
+function global:deactivate ([switch]$NonDestructive) {
+    # Revert to original values
+
+    # The prior prompt:
+    if (Test-Path -Path Function:_OLD_VIRTUAL_PROMPT) {
+        Copy-Item -Path Function:_OLD_VIRTUAL_PROMPT -Destination Function:prompt
+        Remove-Item -Path Function:_OLD_VIRTUAL_PROMPT
+    }
+
+    # The prior PYTHONHOME:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PYTHONHOME) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME -Destination Env:PYTHONHOME
+        Remove-Item -Path Env:_OLD_VIRTUAL_PYTHONHOME
+    }
+
+    # The prior PATH:
+    if (Test-Path -Path Env:_OLD_VIRTUAL_PATH) {
+        Copy-Item -Path Env:_OLD_VIRTUAL_PATH -Destination Env:PATH
+        Remove-Item -Path Env:_OLD_VIRTUAL_PATH
+    }
+
+    # Just remove the VIRTUAL_ENV altogether:
+    if (Test-Path -Path Env:VIRTUAL_ENV) {
+        Remove-Item -Path env:VIRTUAL_ENV
+    }
+
+    # Just remove the _PYTHON_VENV_PROMPT_PREFIX altogether:
+    if (Get-Variable -Name "_PYTHON_VENV_PROMPT_PREFIX" -ErrorAction SilentlyContinue) {
+        Remove-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Scope Global -Force
+    }
+
+    # Leave deactivate function in the global namespace if requested:
+    if (-not $NonDestructive) {
+        Remove-Item -Path function:deactivate
+    }
+}
+
+<#
+.Description
+Get-PyVenvConfig parses the values from the pyvenv.cfg file located in the
+given folder, and returns them in a map.
+
+For each line in the pyvenv.cfg file, if that line can be parsed into exactly
+two strings separated by `=` (with any amount of whitespace surrounding the =)
+then it is considered a `key = value` line. The left hand string is the key,
+the right hand is the value.
+
+If the value starts with a `'` or a `"` then the first and last character is
+stripped from the value before being captured.
+
+.Parameter ConfigDir
+Path to the directory that contains the `pyvenv.cfg` file.
+#>
+function Get-PyVenvConfig(
+    [String]
+    $ConfigDir
+) {
+    Write-Verbose "Given ConfigDir=$ConfigDir, obtain values in pyvenv.cfg"
+
+    # Ensure the file exists, and issue a warning if it doesn't (but still allow the function to continue).
+    $pyvenvConfigPath = Join-Path -Resolve -Path $ConfigDir -ChildPath 'pyvenv.cfg' -ErrorAction Continue
+
+    # An empty map will be returned if no config file is found.
+    $pyvenvConfig = @{ }
+
+    if ($pyvenvConfigPath) {
+
+        Write-Verbose "File exists, parse `key = value` lines"
+        $pyvenvConfigContent = Get-Content -Path $pyvenvConfigPath
+
+        $pyvenvConfigContent | ForEach-Object {
+            $keyval = $PSItem -split "\s*=\s*", 2
+            if ($keyval[0] -and $keyval[1]) {
+                $val = $keyval[1]
+
+                # Remove extraneous quotations around a string value.
+                if ("'""".Contains($val.Substring(0, 1))) {
+                    $val = $val.Substring(1, $val.Length - 2)
+                }
+
+                $pyvenvConfig[$keyval[0]] = $val
+                Write-Verbose "Adding Key: '$($keyval[0])'='$val'"
+            }
+        }
+    }
+    return $pyvenvConfig
+}
+
+
+<# Begin Activate script --------------------------------------------------- #>
+
+# Determine the containing directory of this script
+$VenvExecPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
+$VenvExecDir = Get-Item -Path $VenvExecPath
+
+Write-Verbose "Activation script is located in path: '$VenvExecPath'"
+Write-Verbose "VenvExecDir Fullname: '$($VenvExecDir.FullName)"
+Write-Verbose "VenvExecDir Name: '$($VenvExecDir.Name)"
+
+# Set values required in priority: CmdLine, ConfigFile, Default
+# First, get the location of the virtual environment, it might not be
+# VenvExecDir if specified on the command line.
+if ($VenvDir) {
+    Write-Verbose "VenvDir given as parameter, using '$VenvDir' to determine values"
+}
+else {
+    Write-Verbose "VenvDir not given as a parameter, using parent directory name as VenvDir."
+    $VenvDir = $VenvExecDir.Parent.FullName.TrimEnd("\\/")
+    Write-Verbose "VenvDir=$VenvDir"
+}
+
+# Next, read the `pyvenv.cfg` file to determine any required value such
+# as `prompt`.
+$pyvenvCfg = Get-PyVenvConfig -ConfigDir $VenvDir
+
+# Next, set the prompt from the command line, or the config file, or
+# just use the name of the virtual environment folder.
+if ($Prompt) {
+    Write-Verbose "Prompt specified as argument, using '$Prompt'"
+}
+else {
+    Write-Verbose "Prompt not specified as argument to script, checking pyvenv.cfg value"
+    if ($pyvenvCfg -and $pyvenvCfg['prompt']) {
+        Write-Verbose "  Setting based on value in pyvenv.cfg='$($pyvenvCfg['prompt'])'"
+        $Prompt = $pyvenvCfg['prompt'];
+    }
+    else {
+        Write-Verbose "  Setting prompt based on parent's directory's name. (Is the directory name passed to venv module when creating the virutal environment)"
+        Write-Verbose "  Got leaf-name of $VenvDir='$(Split-Path -Path $venvDir -Leaf)'"
+        $Prompt = Split-Path -Path $venvDir -Leaf
+    }
+}
+
+Write-Verbose "Prompt = '$Prompt'"
+Write-Verbose "VenvDir='$VenvDir'"
+
+# Deactivate any currently active virtual environment, but leave the
+# deactivate function in place.
+deactivate -nondestructive
+
+# Now set the environment variable VIRTUAL_ENV, used by many tools to determine
+# that there is an activated venv.
+$env:VIRTUAL_ENV = $VenvDir
+
+if (-not $Env:VIRTUAL_ENV_DISABLE_PROMPT) {
+
+    Write-Verbose "Setting prompt to '$Prompt'"
+
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT { "" }
+    Copy-Item -Path function:prompt -Destination function:_OLD_VIRTUAL_PROMPT
+    New-Variable -Name _PYTHON_VENV_PROMPT_PREFIX -Description "Python virtual environment prompt prefix" -Scope Global -Option ReadOnly -Visibility Public -Value $Prompt
+
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green "($_PYTHON_VENV_PROMPT_PREFIX) "
+        _OLD_VIRTUAL_PROMPT
+    }
+}
+
+# Clear PYTHONHOME
+if (Test-Path -Path Env:PYTHONHOME) {
+    Copy-Item -Path Env:PYTHONHOME -Destination Env:_OLD_VIRTUAL_PYTHONHOME
+    Remove-Item -Path Env:PYTHONHOME
+}
+
+# Add the venv to the PATH
+Copy-Item -Path Env:PATH -Destination Env:_OLD_VIRTUAL_PATH
+$Env:PATH = "$VenvExecDir$([System.IO.Path]::PathSeparator)$Env:PATH"