http://llvm.org/bugs/show_bug.cgi?id=22108
Bug ID: 22108
Summary: Figure out a better strategy for thread safety between
the debugger thread
Product: lldb
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: lldb-dev@cs.uiuc.edu
Reporter: ztur...@google.com
Classification: Unclassified
Right now the strategy is to stick a lock in every method of ProcessWindows
where there might be contention. This leads to difficult to analyze
situations, and it's not clear if the current mutex locations are either
necessary or sufficient to protect against race conditions. Bug 21883, for
example, was caused by a race condition where the main thread acquired a lock,
signalled the debugger thread to do something and then wait for it to complete.
But the "do something" acquired the same lock, so it never completed.
There may be a better strategy, such as posting events to a message queue, etc
that make these issues go away.
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