[llvm-bugs] [Bug 34070] New: Refactor all LLVM tools to use a common output file management library
llvm-bugs at lists.llvm.org
Fri Aug 4 11:33:16 PDT 2017
Bug ID: 34070
Summary: Refactor all LLVM tools to use a common output file
OS: Windows NT
Component: Support Libraries
Assignee: unassignedbugs at nondot.org
Reporter: rnk at google.com
CC: llvm-bugs at lists.llvm.org
LLVM tools generally produce output and write it to a file. However, they all
do it with varying levels of good behavior. Ideally, a tool has these
1. Atomicity: Regardless of how the tool exits (success, crash, SIGKILL) the
output file should either be complete and valid, or it does not exist.
2. No leaks: During normal operation (successful execution or crash, but not
SIGKILL), no temporary files should be left behind after the tool exits.
We need to beef up ToolOutputFile and FileOutputBuffer to have these
properties, and then refactor all LLVM tools to use them. Right now, neither
successfully deletes their temporary files on Windows because we keep the file
Ideally, we should deprecate RemoveFileOnSignal and sink all this logic into
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