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106 lines
4.8 KiB
Python
106 lines
4.8 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import print_function, unicode_literals
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import re
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class OutputHandler(object):
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'''
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A class for handling Valgrind output.
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Valgrind errors look like this:
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==60741== 40 (24 direct, 16 indirect) bytes in 1 blocks are definitely lost in loss record 2,746 of 5,235
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==60741== at 0x4C26B43: calloc (vg_replace_malloc.c:593)
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==60741== by 0x63AEF65: PR_Calloc (prmem.c:443)
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==60741== by 0x69F236E: PORT_ZAlloc_Util (secport.c:117)
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==60741== by 0x69F1336: SECITEM_AllocItem_Util (secitem.c:28)
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==60741== by 0xA04280B: ffi_call_unix64 (in /builds/slave/m-in-l64-valgrind-000000000000/objdir/toolkit/library/libxul.so)
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==60741== by 0xA042443: ffi_call (ffi64.c:485)
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For each such error, this class extracts most or all of the first (error
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kind) line, plus the function name in each of the first few stack entries.
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With this data it constructs and prints a TEST-UNEXPECTED-FAIL message that
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TBPL will highlight.
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It buffers these lines from which text is extracted so that the
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TEST-UNEXPECTED-FAIL message can be printed before the full error.
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Parsing the Valgrind output isn't ideal, and it may break in the future if
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Valgrind changes the format of the messages, or introduces new error kinds.
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To protect against this, we also count how many lines containing
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"<insert_a_suppression_name_here>" are seen. Thanks to the use of
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--gen-suppressions=yes, exactly one of these lines is present per error. If
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the count of these lines doesn't match the error count found during
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parsing, then the parsing has missed one or more errors and we can fail
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appropriately.
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'''
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def __init__(self):
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# The regexps in this list match all of Valgrind's errors. Note that
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# Valgrind is English-only, so we don't have to worry about
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# localization.
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self.re_error = \
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r'==\d+== (' + \
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r'(Use of uninitialised value of size \d+)|' + \
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r'(Conditional jump or move depends on uninitialised value\(s\))|' + \
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r'(Syscall param .* contains uninitialised byte\(s\))|' + \
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r'(Syscall param .* points to (unaddressable|uninitialised) byte\(s\))|' + \
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r'((Unaddressable|Uninitialised) byte\(s\) found during client check request)|' + \
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r'(Invalid free\(\) / delete / delete\[\] / realloc\(\))|' + \
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r'(Mismatched free\(\) / delete / delete \[\])|' + \
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r'(Invalid (read|write) of size \d+)|' + \
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r'(Jump to the invalid address stated on the next line)|' + \
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r'(Source and destination overlap in .*)|' + \
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r'(.* bytes in .* blocks are .* lost)' + \
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r')'
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# Match identifer chars, plus ':' for namespaces, and '\?' in order to
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# match "???" which Valgrind sometimes produces.
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self.re_stack_entry = r'^==\d+==.*0x[A-Z0-9]+: ([A-Za-z0_9_:\?]+)'
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self.re_suppression = r' *<insert_a_suppression_name_here>'
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self.error_count = 0
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self.suppression_count = 0
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self.number_of_stack_entries_to_get = 0
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self.curr_failure_msg = None
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self.buffered_lines = None
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def __call__(self, line):
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if self.number_of_stack_entries_to_get == 0:
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# Look for the start of a Valgrind error.
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m = re.search(self.re_error, line)
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if m:
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self.error_count += 1
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self.number_of_stack_entries_to_get = 4
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self.curr_failure_msg = 'TEST-UNEXPECTED-FAIL | valgrind-test | ' + m.group(1) + " at "
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self.buffered_lines = [line]
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else:
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print(line)
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else:
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# We've recently found a Valgrind error, and are now extracting
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# details from the first few stack entries.
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self.buffered_lines.append(line)
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m = re.match(self.re_stack_entry, line)
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if m:
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self.curr_failure_msg += m.group(1)
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else:
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self.curr_failure_msg += '?!?'
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self.number_of_stack_entries_to_get -= 1
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if self.number_of_stack_entries_to_get != 0:
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self.curr_failure_msg += ' / '
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else:
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# We've finished getting the first few stack entries. Print the
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# failure message and the buffered lines, and then reset state.
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print('\n' + self.curr_failure_msg + '\n')
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for b in self.buffered_lines:
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print(b)
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self.curr_failure_msg = None
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self.buffered_lines = None
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if re.match(self.re_suppression, line):
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self.suppression_count += 1
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