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[nsan] Swap alignas and visibility order (NFC) #98933

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merged 2 commits into from
Jul 17, 2024
Merged

[nsan] Swap alignas and visibility order (NFC) #98933

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8f3f8e6
[nsan] Use ALIGNED instead of alignas (NFC)
nikic Jul 15, 2024
c73c419
Swap order instead
nikic Jul 16, 2024
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21 changes: 10 additions & 11 deletions compiler-rt/lib/nsan/nsan.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -390,24 +390,23 @@ __nsan_dump_shadow_mem(const u8 *addr, size_t size_bytes, size_t bytes_per_line,
}
}

SANITIZER_INTERFACE_ATTRIBUTE
alignas(16) thread_local uptr __nsan_shadow_ret_tag = 0;
alignas(16) SANITIZER_INTERFACE_ATTRIBUTE
thread_local uptr __nsan_shadow_ret_tag = 0;

SANITIZER_INTERFACE_ATTRIBUTE
alignas(16) thread_local char __nsan_shadow_ret_ptr[kMaxVectorWidth *
sizeof(__float128)];
alignas(16) SANITIZER_INTERFACE_ATTRIBUTE
thread_local char __nsan_shadow_ret_ptr[kMaxVectorWidth *
sizeof(__float128)];

SANITIZER_INTERFACE_ATTRIBUTE
alignas(16) thread_local uptr __nsan_shadow_args_tag = 0;
alignas(16) SANITIZER_INTERFACE_ATTRIBUTE
thread_local uptr __nsan_shadow_args_tag = 0;

// Maximum number of args. This should be enough for anyone (tm). An alternate
// scheme is to have the generated code create an alloca and make
// __nsan_shadow_args_ptr point ot the alloca.
constexpr const int kMaxNumArgs = 128;
SANITIZER_INTERFACE_ATTRIBUTE
alignas(
16) thread_local char __nsan_shadow_args_ptr[kMaxVectorWidth * kMaxNumArgs *
sizeof(__float128)];
alignas(16) SANITIZER_INTERFACE_ATTRIBUTE
thread_local char __nsan_shadow_args_ptr[kMaxVectorWidth * kMaxNumArgs *
sizeof(__float128)];

enum ContinuationType { // Keep in sync with instrumentation pass.
kContinueWithShadow = 0,
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