llvm-6502/utils/lit/TestRunner.py
Daniel Dunbar 5a461dd513 lit: When executing shell scripts internally, don't allow piped stderr on any
commands except the last one, instead redirect the stderr to a temporary
file. This sidesteps a potential deadlocking issue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82538 91177308-0d34-0410-b5e6-96231b3b80d8
2009-09-22 09:50:38 +00:00

506 lines
16 KiB
Python

import os, signal, subprocess, sys
import StringIO
import ShUtil
import Test
import Util
import platform
import tempfile
class InternalShellError(Exception):
def __init__(self, command, message):
self.command = command
self.message = message
# Don't use close_fds on Windows.
kUseCloseFDs = platform.system() != 'Windows'
def executeCommand(command, cwd=None, env=None):
p = subprocess.Popen(command, cwd=cwd,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=env)
out,err = p.communicate()
exitCode = p.wait()
# Detect Ctrl-C in subprocess.
if exitCode == -signal.SIGINT:
raise KeyboardInterrupt
return out, err, exitCode
def executeShCmd(cmd, cfg, cwd, results):
if isinstance(cmd, ShUtil.Seq):
if cmd.op == ';':
res = executeShCmd(cmd.lhs, cfg, cwd, results)
return executeShCmd(cmd.rhs, cfg, cwd, results)
if cmd.op == '&':
raise NotImplementedError,"unsupported test command: '&'"
if cmd.op == '||':
res = executeShCmd(cmd.lhs, cfg, cwd, results)
if res != 0:
res = executeShCmd(cmd.rhs, cfg, cwd, results)
return res
if cmd.op == '&&':
res = executeShCmd(cmd.lhs, cfg, cwd, results)
if res is None:
return res
if res == 0:
res = executeShCmd(cmd.rhs, cfg, cwd, results)
return res
raise ValueError,'Unknown shell command: %r' % cmd.op
assert isinstance(cmd, ShUtil.Pipeline)
procs = []
input = subprocess.PIPE
stderrTempFiles = []
# To avoid deadlock, we use a single stderr stream for piped
# output. This is null until we have seen some output using
# stderr.
for i,j in enumerate(cmd.commands):
redirects = [(0,), (1,), (2,)]
for r in j.redirects:
if r[0] == ('>',2):
redirects[2] = [r[1], 'w', None]
elif r[0] == ('>&',2) and r[1] in '012':
redirects[2] = redirects[int(r[1])]
elif r[0] == ('>&',) or r[0] == ('&>',):
redirects[1] = redirects[2] = [r[1], 'w', None]
elif r[0] == ('>',):
redirects[1] = [r[1], 'w', None]
elif r[0] == ('<',):
redirects[0] = [r[1], 'r', None]
else:
raise NotImplementedError,"Unsupported redirect: %r" % (r,)
final_redirects = []
for index,r in enumerate(redirects):
if r == (0,):
result = input
elif r == (1,):
if index == 0:
raise NotImplementedError,"Unsupported redirect for stdin"
elif index == 1:
result = subprocess.PIPE
else:
result = subprocess.STDOUT
elif r == (2,):
if index != 2:
raise NotImplementedError,"Unsupported redirect on stdout"
result = subprocess.PIPE
else:
if r[2] is None:
r[2] = open(r[0], r[1])
result = r[2]
final_redirects.append(result)
stdin, stdout, stderr = final_redirects
# If stderr wants to come from stdout, but stdout isn't a pipe, then put
# stderr on a pipe and treat it as stdout.
if (stderr == subprocess.STDOUT and stdout != subprocess.PIPE):
stderr = subprocess.PIPE
stderrIsStdout = True
else:
stderrIsStdout = False
# Don't allow stderr on a PIPE except for the last
# process, this could deadlock.
#
# FIXME: This is slow, but so is deadlock.
if stderr == subprocess.PIPE and j != cmd.commands[-1]:
stderr = tempfile.TemporaryFile(mode='w+b')
stderrTempFiles.append((i, stderr))
# Resolve the executable path ourselves.
args = list(j.args)
args[0] = Util.which(args[0], cfg.environment['PATH'])
if not args[0]:
raise InternalShellError(j, '%r: command not found' % j.args[0])
procs.append(subprocess.Popen(args, cwd=cwd,
stdin = stdin,
stdout = stdout,
stderr = stderr,
env = cfg.environment,
close_fds = kUseCloseFDs))
# Immediately close stdin for any process taking stdin from us.
if stdin == subprocess.PIPE:
procs[-1].stdin.close()
procs[-1].stdin = None
# Update the current stdin source.
if stdout == subprocess.PIPE:
input = procs[-1].stdout
elif stderrIsStdout:
input = procs[-1].stderr
else:
input = subprocess.PIPE
# FIXME: There is probably still deadlock potential here. Yawn.
procData = [None] * len(procs)
procData[-1] = procs[-1].communicate()
for i in range(len(procs) - 1):
if procs[i].stdout is not None:
out = procs[i].stdout.read()
else:
out = ''
if procs[i].stderr is not None:
err = procs[i].stderr.read()
else:
err = ''
procData[i] = (out,err)
# Read stderr out of the temp files.
for i,f in stderrTempFiles:
f.seek(0, 0)
procData[i] = (procData[i][0], f.read())
exitCode = None
for i,(out,err) in enumerate(procData):
res = procs[i].wait()
# Detect Ctrl-C in subprocess.
if res == -signal.SIGINT:
raise KeyboardInterrupt
results.append((cmd.commands[i], out, err, res))
if cmd.pipe_err:
# Python treats the exit code as a signed char.
if res < 0:
exitCode = min(exitCode, res)
else:
exitCode = max(exitCode, res)
else:
exitCode = res
if cmd.negate:
exitCode = not exitCode
return exitCode
def executeScriptInternal(test, litConfig, tmpBase, commands, cwd):
ln = ' &&\n'.join(commands)
try:
cmd = ShUtil.ShParser(ln, litConfig.isWindows).parse()
except:
return (Test.FAIL, "shell parser error on: %r" % ln)
results = []
try:
exitCode = executeShCmd(cmd, test.config, cwd, results)
except InternalShellError,e:
out = ''
err = e.message
exitCode = 255
out = err = ''
for i,(cmd, cmd_out,cmd_err,res) in enumerate(results):
out += 'Command %d: %s\n' % (i, ' '.join('"%s"' % s for s in cmd.args))
out += 'Command %d Result: %r\n' % (i, res)
out += 'Command %d Output:\n%s\n\n' % (i, cmd_out)
out += 'Command %d Stderr:\n%s\n\n' % (i, cmd_err)
return out, err, exitCode
def executeTclScriptInternal(test, litConfig, tmpBase, commands, cwd):
import TclUtil
cmds = []
for ln in commands:
# Given the unfortunate way LLVM's test are written, the line gets
# backslash substitution done twice.
ln = TclUtil.TclLexer(ln).lex_unquoted(process_all = True)
try:
tokens = list(TclUtil.TclLexer(ln).lex())
except:
return (Test.FAIL, "Tcl lexer error on: %r" % ln)
# Validate there are no control tokens.
for t in tokens:
if not isinstance(t, str):
return (Test.FAIL,
"Invalid test line: %r containing %r" % (ln, t))
try:
cmds.append(TclUtil.TclExecCommand(tokens).parse_pipeline())
except:
return (Test.FAIL, "Tcl 'exec' parse error on: %r" % ln)
cmd = cmds[0]
for c in cmds[1:]:
cmd = ShUtil.Seq(cmd, '&&', c)
if litConfig.useTclAsSh:
script = tmpBase + '.script'
# Write script file
f = open(script,'w')
print >>f, 'set -o pipefail'
cmd.toShell(f, pipefail = True)
f.close()
if 0:
print >>sys.stdout, cmd
print >>sys.stdout, open(script).read()
print >>sys.stdout
return '', '', 0
command = ['/bin/bash', script]
out,err,exitCode = executeCommand(command, cwd=cwd,
env=test.config.environment)
# Tcl commands fail on standard error output.
if err:
exitCode = 1
out = 'Command has output on stderr!\n\n' + out
return out,err,exitCode
else:
results = []
try:
exitCode = executeShCmd(cmd, test.config, cwd, results)
except InternalShellError,e:
results.append((e.command, '', e.message + '\n', 255))
exitCode = 255
out = err = ''
# Tcl commands fail on standard error output.
if [True for _,_,err,res in results if err]:
exitCode = 1
out += 'Command has output on stderr!\n\n'
for i,(cmd, cmd_out, cmd_err, res) in enumerate(results):
out += 'Command %d: %s\n' % (i, ' '.join('"%s"' % s for s in cmd.args))
out += 'Command %d Result: %r\n' % (i, res)
out += 'Command %d Output:\n%s\n\n' % (i, cmd_out)
out += 'Command %d Stderr:\n%s\n\n' % (i, cmd_err)
return out, err, exitCode
def executeScript(test, litConfig, tmpBase, commands, cwd):
script = tmpBase + '.script'
if litConfig.isWindows:
script += '.bat'
# Write script file
f = open(script,'w')
if litConfig.isWindows:
f.write('\nif %ERRORLEVEL% NEQ 0 EXIT\n'.join(commands))
else:
f.write(' &&\n'.join(commands))
f.write('\n')
f.close()
if litConfig.isWindows:
command = ['cmd','/c', script]
else:
command = ['/bin/sh', script]
if litConfig.useValgrind:
# FIXME: Running valgrind on sh is overkill. We probably could just
# run on clang with no real loss.
valgrindArgs = ['valgrind', '-q',
'--tool=memcheck', '--trace-children=yes',
'--error-exitcode=123']
valgrindArgs.extend(litConfig.valgrindArgs)
command = valgrindArgs + command
return executeCommand(command, cwd=cwd, env=test.config.environment)
def parseIntegratedTestScript(test, xfailHasColon, requireAndAnd):
"""parseIntegratedTestScript - Scan an LLVM/Clang style integrated test
script and extract the lines to 'RUN' as well as 'XFAIL' and 'XTARGET'
information. The RUN lines also will have variable substitution performed.
"""
# Get the temporary location, this is always relative to the test suite
# root, not test source root.
#
# FIXME: This should not be here?
sourcepath = test.getSourcePath()
execpath = test.getExecPath()
execdir,execbase = os.path.split(execpath)
tmpBase = os.path.join(execdir, 'Output', execbase)
# We use #_MARKER_# to hide %% while we do the other substitutions.
substitutions = [('%%', '#_MARKER_#')]
substitutions.extend(test.config.substitutions)
substitutions.extend([('%s', sourcepath),
('%S', os.path.dirname(sourcepath)),
('%p', os.path.dirname(sourcepath)),
('%t', tmpBase + '.tmp'),
# FIXME: Remove this once we kill DejaGNU.
('%abs_tmp', tmpBase + '.tmp'),
('#_MARKER_#', '%')])
# Collect the test lines from the script.
script = []
xfails = []
xtargets = []
for ln in open(sourcepath):
if 'RUN:' in ln:
# Isolate the command to run.
index = ln.index('RUN:')
ln = ln[index+4:]
# Trim trailing whitespace.
ln = ln.rstrip()
# Collapse lines with trailing '\\'.
if script and script[-1][-1] == '\\':
script[-1] = script[-1][:-1] + ln
else:
script.append(ln)
elif xfailHasColon and 'XFAIL:' in ln:
items = ln[ln.index('XFAIL:') + 6:].split(',')
xfails.extend([s.strip() for s in items])
elif not xfailHasColon and 'XFAIL' in ln:
items = ln[ln.index('XFAIL') + 5:].split(',')
xfails.extend([s.strip() for s in items])
elif 'XTARGET:' in ln:
items = ln[ln.index('XTARGET:') + 8:].split(',')
xtargets.extend([s.strip() for s in items])
elif 'END.' in ln:
# Check for END. lines.
if ln[ln.index('END.'):].strip() == 'END.':
break
# Apply substitutions to the script.
def processLine(ln):
# Apply substitutions
for a,b in substitutions:
ln = ln.replace(a,b)
# Strip the trailing newline and any extra whitespace.
return ln.strip()
script = map(processLine, script)
# Verify the script contains a run line.
if not script:
return (Test.UNRESOLVED, "Test has no run line!")
if script[-1][-1] == '\\':
return (Test.UNRESOLVED, "Test has unterminated run lines (with '\\')")
# Validate interior lines for '&&', a lovely historical artifact.
if requireAndAnd:
for i in range(len(script) - 1):
ln = script[i]
if not ln.endswith('&&'):
return (Test.FAIL,
("MISSING \'&&\': %s\n" +
"FOLLOWED BY : %s\n") % (ln, script[i + 1]))
# Strip off '&&'
script[i] = ln[:-2]
return script,xfails,xtargets,tmpBase,execdir
def formatTestOutput(status, out, err, exitCode, script):
output = StringIO.StringIO()
print >>output, "Script:"
print >>output, "--"
print >>output, '\n'.join(script)
print >>output, "--"
print >>output, "Exit Code: %r" % exitCode
print >>output, "Command Output (stdout):"
print >>output, "--"
output.write(out)
print >>output, "--"
print >>output, "Command Output (stderr):"
print >>output, "--"
output.write(err)
print >>output, "--"
return (status, output.getvalue())
def executeTclTest(test, litConfig):
if test.config.unsupported:
return (Test.UNSUPPORTED, 'Test is unsupported')
res = parseIntegratedTestScript(test, True, False)
if len(res) == 2:
return res
script, xfails, xtargets, tmpBase, execdir = res
if litConfig.noExecute:
return (Test.PASS, '')
# Create the output directory if it does not already exist.
Util.mkdir_p(os.path.dirname(tmpBase))
res = executeTclScriptInternal(test, litConfig, tmpBase, script, execdir)
if len(res) == 2:
return res
isXFail = False
for item in xfails:
if item == '*' or item in test.suite.config.target_triple:
isXFail = True
break
# If this is XFAIL, see if it is expected to pass on this target.
if isXFail:
for item in xtargets:
if item == '*' or item in test.suite.config.target_triple:
isXFail = False
break
out,err,exitCode = res
if isXFail:
ok = exitCode != 0
status = (Test.XPASS, Test.XFAIL)[ok]
else:
ok = exitCode == 0
status = (Test.FAIL, Test.PASS)[ok]
if ok:
return (status,'')
return formatTestOutput(status, out, err, exitCode, script)
def executeShTest(test, litConfig, useExternalSh, requireAndAnd):
if test.config.unsupported:
return (Test.UNSUPPORTED, 'Test is unsupported')
res = parseIntegratedTestScript(test, False, requireAndAnd)
if len(res) == 2:
return res
script, xfails, xtargets, tmpBase, execdir = res
if litConfig.noExecute:
return (Test.PASS, '')
# Create the output directory if it does not already exist.
Util.mkdir_p(os.path.dirname(tmpBase))
if useExternalSh:
res = executeScript(test, litConfig, tmpBase, script, execdir)
else:
res = executeScriptInternal(test, litConfig, tmpBase, script, execdir)
if len(res) == 2:
return res
out,err,exitCode = res
if xfails:
ok = exitCode != 0
status = (Test.XPASS, Test.XFAIL)[ok]
else:
ok = exitCode == 0
status = (Test.FAIL, Test.PASS)[ok]
if ok:
return (status,'')
return formatTestOutput(status, out, err, exitCode, script)