Fix compiler crashes when instrumenting programs with nested Cilk contexts and nested reducers #309
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neboat
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Jan 15, 2025
neboat
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- During loop-spawning avoid moving syncregions unnecessarily out of a taskframe added to the synthesized parallel divide-and-conquer routine. This change fixes Nested reducer causes Cilksan crash at runtime and compiler crash when building for Cilkscale #306
- Work around an issue when instrumenting a program simultaneously with Cilksan and ASan, where ASan's hooks are not inserted into spawned tasks with the correct exception-handling blocks.
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… to avoid hosting syncregions used within a taskframe inserted by loop-spawning outside of that taskframe. Improve logic for finding external uses of taskframes to fixup.
…r CilkSanitizer instrumentation. If ASan inserts hooks into spawned tasks with other exception-handling logic, it either needs to mark that these hooks do not throw or it needs to invoke these hooks with unwinding blocks that connect with the unwind blocks of the enclosing task. ASan does not currently do this and instead inserts these hooks naively. This change works around ASan's behavior by marking that calls to ASan hook in spawned tasks do not throw.
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…ix promotion of calls to invokes when potentially-throwing calls are inside tasks with unwind destinations.
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