2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
93 lines
2.3 KiB
Python
Executable File
93 lines
2.3 KiB
Python
Executable File
#!/usr/bin/env python
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#===- lib/fuzzer/scripts/unbalanced_allocs.py ------------------------------===#
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#
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# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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# See https://llvm.org/LICENSE.txt for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#
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#===------------------------------------------------------------------------===#
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#
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# Post-process -trace_malloc=2 output and printout only allocations and frees
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# unbalanced inside of fuzzer runs.
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# Usage:
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# my_fuzzer -trace_malloc=2 -runs=10 2>&1 | unbalanced_allocs.py -skip=5
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#
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#===------------------------------------------------------------------------===#
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import argparse
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import sys
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_skip = 0
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def PrintStack(line, stack):
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global _skip
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if _skip > 0:
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return
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print('Unbalanced ' + line.rstrip());
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for l in stack:
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print(l.rstrip())
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def ProcessStack(line, f):
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stack = []
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while line and line.startswith(' #'):
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stack += [line]
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line = f.readline()
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return line, stack
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def ProcessFree(line, f, allocs):
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if not line.startswith('FREE['):
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return f.readline()
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addr = int(line.split()[1], 16)
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next_line, stack = ProcessStack(f.readline(), f)
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if addr in allocs:
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del allocs[addr]
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else:
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PrintStack(line, stack)
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return next_line
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def ProcessMalloc(line, f, allocs):
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if not line.startswith('MALLOC['):
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return ProcessFree(line, f, allocs)
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addr = int(line.split()[1], 16)
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assert not addr in allocs
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next_line, stack = ProcessStack(f.readline(), f)
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allocs[addr] = (line, stack)
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return next_line
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def ProcessRun(line, f):
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if not line.startswith('MallocFreeTracer: START'):
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return ProcessMalloc(line, f, {})
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allocs = {}
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print(line.rstrip())
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line = f.readline()
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while line:
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if line.startswith('MallocFreeTracer: STOP'):
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global _skip
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_skip = _skip - 1
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for _, (l, s) in allocs.items():
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PrintStack(l, s)
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print(line.rstrip())
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return f.readline()
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line = ProcessMalloc(line, f, allocs)
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return line
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def ProcessFile(f):
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line = f.readline()
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while line:
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line = ProcessRun(line, f);
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def main(argv):
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parser = argparse.ArgumentParser()
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parser.add_argument('--skip', default=0, help='number of runs to ignore')
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args = parser.parse_args()
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global _skip
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_skip = int(args.skip) + 1
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ProcessFile(sys.stdin)
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if __name__ == '__main__':
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main(sys.argv)
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