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025d4791c0
This reverts D53469, which changed llvm's DWARF emission to emit DW_AT_call_return_pc as a function-local offset. Such an encoding is not compatible with post-link block re-ordering tools and isn't standards- compliant. In addition to reverting back to the original DW_AT_call_return_pc encoding, teach lldb how to fix up DW_AT_call_return_pc when the address comes from an object file pointed-to by a debug map. While doing this I noticed that lldb's support for tail calls that cross a DSO/object file boundary wasn't covered, so I added tests for that. This latter case exercises the newly added return PC fixup. The dsymutil changes in this patch were originally included in D49887: the associated test should be sufficient to test DW_AT_call_return_pc encoding purely on the llvm side. Differential Revision: https://reviews.llvm.org/D72489 |
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