import pytest
import re
import sys
+import u_boot_spawn
# Regexes for text we expect U-Boot to send to the console.
pattern_u_boot_spl_signon = re.compile('(U-Boot SPL \\d{4}\\.\\d{2}-[^\r\n]*)')
pattern_error_notification = re.compile('## Error: ')
class ConsoleDisableCheck(object):
- '''Context manager (for Python's with statement) that temporarily disables
+ """Context manager (for Python's with statement) that temporarily disables
the specified console output error check. This is useful when deliberately
executing a command that is known to trigger one of the error checks, in
order to test that the error condition is actually raised. This class is
used internally by ConsoleBase::disable_check(); it is not intended for
- direct usage.'''
+ direct usage."""
def __init__(self, console, check_type):
self.console = console
self.console.disable_check_count[self.check_type] -= 1
class ConsoleBase(object):
- '''The interface through which test functions interact with the U-Boot
+ """The interface through which test functions interact with the U-Boot
console. This primarily involves executing shell commands, capturing their
results, and checking for common error conditions. Some common utilities
- are also provided too.'''
+ are also provided too."""
def __init__(self, log, config, max_fifo_fill):
- '''Initialize a U-Boot console connection.
+ """Initialize a U-Boot console connection.
Can only usefully be called by sub-classes.
Returns:
Nothing.
- '''
+ """
self.log = log
self.config = config
self.at_prompt = False
self.at_prompt_logevt = None
- self.ram_base = None
def close(self):
- '''Terminate the connection to the U-Boot console.
+ """Terminate the connection to the U-Boot console.
This function is only useful once all interaction with U-Boot is
complete. Once this function is called, data cannot be sent to or
Returns:
Nothing.
- '''
+ """
if self.p:
self.p.close()
def run_command(self, cmd, wait_for_echo=True, send_nl=True,
wait_for_prompt=True):
- '''Execute a command via the U-Boot console.
+ """Execute a command via the U-Boot console.
The command is always sent to U-Boot.
The output from U-Boot during command execution. In other
words, the text U-Boot emitted between the point it echod the
command string and emitted the subsequent command prompts.
- '''
-
- self.ensure_spawned()
+ """
if self.at_prompt and \
self.at_prompt_logevt != self.logstream.logfile.cur_evt:
bad_patterns = []
bad_pattern_ids = []
- if (self.disable_check_count['spl_signon'] == 0 and
- self.u_boot_spl_signon):
- bad_patterns.append(self.u_boot_spl_signon_escaped)
+ if (self.disable_check_count['spl_signon'] == 0):
+ bad_patterns.append(pattern_u_boot_spl_signon)
bad_pattern_ids.append('SPL signon')
if self.disable_check_count['main_signon'] == 0:
- bad_patterns.append(self.u_boot_main_signon_escaped)
+ bad_patterns.append(pattern_u_boot_main_signon)
bad_pattern_ids.append('U-Boot main signon')
if self.disable_check_count['unknown_command'] == 0:
bad_patterns.append(pattern_unknown_command)
raise
def ctrlc(self):
- '''Send a CTRL-C character to U-Boot.
+ """Send a CTRL-C character to U-Boot.
This is useful in order to stop execution of long-running synchronous
commands such as "ums".
Returns:
Nothing.
- '''
+ """
+ self.log.action('Sending Ctrl-C')
self.run_command(chr(3), wait_for_echo=False, send_nl=False)
+ def wait_for(self, text):
+ """Wait for a pattern to be emitted by U-Boot.
+
+ This is useful when a long-running command such as "dfu" is executing,
+ and it periodically emits some text that should show up at a specific
+ location in the log file.
+
+ Args:
+ text: The text to wait for; either a string (containing raw text,
+ not a regular expression) or an re object.
+
+ Returns:
+ Nothing.
+ """
+
+ if type(text) == type(''):
+ text = re.escape(text)
+ self.p.expect([text])
+
+ def drain_console(self):
+ """Read from and log the U-Boot console for a short time.
+
+ U-Boot's console output is only logged when the test code actively
+ waits for U-Boot to emit specific data. There are cases where tests
+ can fail without doing this. For example, if a test asks U-Boot to
+ enable USB device mode, then polls until a host-side device node
+ exists. In such a case, it is useful to log U-Boot's console output
+ in case U-Boot printed clues as to why the host-side even did not
+ occur. This function will do that.
+
+ Args:
+ None.
+
+ Returns:
+ Nothing.
+ """
+
+ # If we are already not connected to U-Boot, there's nothing to drain.
+ # This should only happen when a previous call to run_command() or
+ # wait_for() failed (and hence the output has already been logged), or
+ # the system is shutting down.
+ if not self.p:
+ return
+
+ orig_timeout = self.p.timeout
+ try:
+ # Drain the log for a relatively short time.
+ self.p.timeout = 1000
+ # Wait for something U-Boot will likely never send. This will
+ # cause the console output to be read and logged.
+ self.p.expect(['This should never match U-Boot output'])
+ except u_boot_spawn.Timeout:
+ pass
+ finally:
+ self.p.timeout = orig_timeout
+
def ensure_spawned(self):
- '''Ensure a connection to a correctly running U-Boot instance.
+ """Ensure a connection to a correctly running U-Boot instance.
This may require spawning a new Sandbox process or resetting target
hardware, as defined by the implementation sub-class.
Returns:
Nothing.
- '''
+ """
if self.p:
return
self.p.logfile_read = self.logstream
if self.config.buildconfig.get('CONFIG_SPL', False) == 'y':
self.p.expect([pattern_u_boot_spl_signon])
- self.u_boot_spl_signon = self.p.after
- self.u_boot_spl_signon_escaped = re.escape(self.p.after)
- else:
- self.u_boot_spl_signon = None
self.p.expect([pattern_u_boot_main_signon])
- self.u_boot_main_signon = self.p.after
- self.u_boot_main_signon_escaped = re.escape(self.p.after)
- build_idx = self.u_boot_main_signon.find(', Build:')
+ signon = self.p.after
+ build_idx = signon.find(', Build:')
if build_idx == -1:
- self.u_boot_version_string = self.u_boot_main_signon
+ self.u_boot_version_string = signon
else:
- self.u_boot_version_string = self.u_boot_main_signon[:build_idx]
+ self.u_boot_version_string = signon[:build_idx]
while True:
match = self.p.expect([self.prompt_escaped,
pattern_stop_autoboot_prompt])
raise
def cleanup_spawn(self):
- '''Shut down all interaction with the U-Boot instance.
+ """Shut down all interaction with the U-Boot instance.
This is used when an error is detected prior to re-establishing a
connection with a fresh U-Boot instance.
Returns:
Nothing.
- '''
+ """
try:
if self.p:
self.p = None
def validate_version_string_in_text(self, text):
- '''Assert that a command's output includes the U-Boot signon message.
+ """Assert that a command's output includes the U-Boot signon message.
This is primarily useful for validating the "version" command without
duplicating the signon text regex in a test function.
Returns:
Nothing. An exception is raised if the validation fails.
- '''
+ """
assert(self.u_boot_version_string in text)
def disable_check(self, check_type):
- '''Temporarily disable an error check of U-Boot's output.
+ """Temporarily disable an error check of U-Boot's output.
Create a new context manager (for use with the "with" statement) which
temporarily disables a particular console output error check.
Returns:
A context manager object.
- '''
+ """
return ConsoleDisableCheck(self, check_type)
-
- def find_ram_base(self):
- '''Find the running U-Boot's RAM location.
-
- Probe the running U-Boot to determine the address of the first bank
- of RAM. This is useful for tests that test reading/writing RAM, or
- load/save files that aren't associated with some standard address
- typically represented in an environment variable such as
- ${kernel_addr_r}. The value is cached so that it only needs to be
- actively read once.
-
- Args:
- None.
-
- Returns:
- The address of U-Boot's first RAM bank, as an integer.
- '''
-
- if self.config.buildconfig.get('config_cmd_bdi', 'n') != 'y':
- pytest.skip('bdinfo command not supported')
- if self.ram_base == -1:
- pytest.skip('Previously failed to find RAM bank start')
- if self.ram_base is not None:
- return self.ram_base
-
- with self.log.section('find_ram_base'):
- response = self.run_command('bdinfo')
- for l in response.split('\n'):
- if '-> start' in l:
- self.ram_base = int(l.split('=')[1].strip(), 16)
- break
- if self.ram_base is None:
- self.ram_base = -1
- raise Exception('Failed to find RAM bank start in `bdinfo`')
-
- return self.ram_base
projects / oweals / u-boot.git / blobdiff