[Lldb-commits] [PATCH] D122943: [LLDB][NativePDB] Fix a crash when S_DEFRANGE_SUBFIELD_REGISTER descirbes a simple type

[Zequan Wu via Phabricator via lldb-commits]

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When a variable is simple type and has 64 bits, the debug info may look like the following when targeting 32bit windows. The variable's content is split into two 32bits registers.

  480 | S_LOCAL [size = 12] `x`
        type=0x0013 (__int64), flags = param
  492 | S_DEFRANGE_SUBFIELD_REGISTER [size = 20]
        register = EAX, may have no name = true, offset in parent = 0
        range = [0001:0073,+7), gaps = []
  512 | S_DEFRANGE_SUBFIELD_REGISTER [size = 20]
        register = ECX, may have no name = true, offset in parent = 4
        range = [0001:0073,+7), gaps = []


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D122943

Files:
  lldb/source/Plugins/SymbolFile/NativePDB/PdbUtil.cpp
  lldb/test/Shell/SymbolFile/NativePDB/Inputs/subfield_register_simple_type.lldbinit
  lldb/test/Shell/SymbolFile/NativePDB/subfield_register_simple_type.s

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