[lldb] Move copying of files into reproducer out of process #2042
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For performance reasons the reproducers don't copy the files captured by the file collector eagerly, but wait until the reproducer needs to be generated. This is a problematic when LLDB crashes and we have to do all this signal-unsafe work in the signal handler. This patch uses a similar trick to clang, which has the driver invoke a new cc1 instance to do all this work out-of-process. This patch moves the writing of the mapping file as well as copying over the reproducers into a separate process spawned when lldb crashes. Differential revision: https://reviews.llvm.org/D89600 (cherry picked from commit 73811d3)
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Depends on swiftlang/swift#34442 |
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For performance reasons the reproducers don't copy the files captured by
the file collector eagerly, but wait until the reproducer needs to be
generated.
This is a problematic when LLDB crashes and we have to do all this
signal-unsafe work in the signal handler. This patch uses a similar
trick to clang, which has the driver invoke a new cc1 instance to do all
this work out-of-process.
This patch moves the writing of the mapping file as well as copying over
the reproducers into a separate process spawned when lldb crashes.
Differential revision: https://reviews.llvm.org/D89600
(cherry picked from commit 73811d3)