forked from OSchip/llvm-project
b6a93967d9
These two are not conceptually the same; the former is a pointer shoved in an integer, the latter is an offset or length. On the architectures supported by libunwind, these two have the same underlying type, namely unsigned int on ILP32, unsigned long on LP64 and unsigned long long on LLP64. However, on CHERI, and thus Arm's Morello, they are not the same, as pointers are hardware capabilities that carry additional metadata including bounds and permissions, which is preserved in uintptr_t but not in size_t. Thus, fix all length variables to be of type size_t not uintptr_t, as we have done downstream for a while in CHERI LLVM but did not get round to upstreaming. Note that dyld_unwind_sections is currently defined in Apple's headers as genuinely using uintptr_t to represent lengths. This is a bad API and should be fixed, which would be totally API and ABI compatible due to size_t and uintptr_t being the same type on all supported Apple systems, but our definition is left matching theirs until such a time as they fix their bogus types. This is intended to be an NFC change on all architectures supported by LLVM upstream, only being a functional change for CHERI downstream in CHERI LLVM. |
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