buildman: Detect Kconfig loops
Hex and int Kconfig options are supposed to have defaults. This is so we
can configure U-Boot without having to enter particular values for the
items that don't have specific values in the board's defconfig file.
If this rule is not followed, then introducing a new Kconfig can produce
a loop like this:
Break things (BREAK_ME) [] (NEW)
Error in reading or end of file.
Break things (BREAK_ME) [] (NEW)
Error in reading or end of file.
The continues forever since buildman passes /dev/null to 'conf', and
the build system just tries again. Eventually there is so much output that
buildman runs out of memory.
We can detect this situation by looking for a symbol (like 'BREAK_ME')
which has no default (the '[]' above) and is marked as new. If this
appears multiple times in the output, we know something is wrong.
Add a filter function for the output which detects this situation. Allow
it to return True to terminate the process. Implement this termination in
cros_subprocess.
With this we get a nice message:
buildman --board sandbox -T0
Building current source for 1 boards (0 threads, 32 jobs per thread)
sandbox: w+ sandbox
+.config:66:warning: symbol value '' invalid for BREAK_ME
+
+Error in reading or end of file.
+make[3]: *** [scripts/kconfig/Makefile:75: syncconfig] Terminated
+make[2]: *** [Makefile:569: syncconfig] Terminated
+make: *** [Makefile:177: sub-make] Terminated
+(** did you define an int/hex Kconfig with no default? **)
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/command.py b/tools/patman/command.py
index bf8ea6c..d54b1e0 100644
--- a/tools/patman/command.py
+++ b/tools/patman/command.py
@@ -49,7 +49,8 @@
def RunPipe(pipe_list, infile=None, outfile=None,
capture=False, capture_stderr=False, oneline=False,
- raise_on_error=True, cwd=None, binary=False, **kwargs):
+ raise_on_error=True, cwd=None, binary=False,
+ output_func=None, **kwargs):
"""
Perform a command pipeline, with optional input/output filenames.
@@ -63,6 +64,8 @@
capture: True to capture output
capture_stderr: True to capture stderr
oneline: True to strip newline chars from output
+ output_func: Output function to call with each output fragment
+ (if it returns True the function terminates)
kwargs: Additional keyword arguments to cros_subprocess.Popen()
Returns:
CommandResult object
@@ -105,7 +108,7 @@
if capture:
result.stdout, result.stderr, result.combined = (
- last_pipe.CommunicateFilter(None))
+ last_pipe.CommunicateFilter(output_func))
if result.stdout and oneline:
result.output = result.stdout.rstrip(b'\r\n')
result.return_code = last_pipe.wait()
diff --git a/tools/patman/cros_subprocess.py b/tools/patman/cros_subprocess.py
index fdd5138..88a4693 100644
--- a/tools/patman/cros_subprocess.py
+++ b/tools/patman/cros_subprocess.py
@@ -128,6 +128,9 @@
sys.stdout or sys.stderr.
data: a string containing the data
+ Returns:
+ True to terminate the process
+
Note: The data read is buffered in memory, so do not use this
method if the data size is large or unlimited.
@@ -175,6 +178,7 @@
stderr = bytearray()
combined = bytearray()
+ stop_now = False
input_offset = 0
while read_set or write_set:
try:
@@ -212,7 +216,7 @@
stdout += data
combined += data
if output:
- output(sys.stdout, data)
+ stop_now = output(sys.stdout, data)
if self.stderr in rlist:
data = b''
# We will get an error on read if the pty is closed
@@ -227,7 +231,9 @@
stderr += data
combined += data
if output:
- output(sys.stderr, data)
+ stop_now = output(sys.stderr, data)
+ if stop_now:
+ self.terminate()
# All data exchanged. Translate lists into strings.
stdout = self.ConvertData(stdout)