12395b7795
Such globals are very likely to be part of a sorted section array, such the .CRT sections used for dynamic initialization. The uses its own sorted sections called ATL$__a, ATL$__m, and ATL$__z. Instead of special casing them, just look for the dollar sign, which is what invokes linker section sorting for COFF. Avoids issues with ASan and the ATL uncovered after we started instrumenting comdat globals on COFF. llvm-svn: 334653
54 lines
2.8 KiB
LLVM
54 lines
2.8 KiB
LLVM
; RUN: opt < %s -asan -asan-module -S | FileCheck %s
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; All of these globals should pass through uninstrumented because of their
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; custom section name. The .CRT section is the standard way to register custom
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; initializers, and the ATL uses the ATL section to register other stuff.
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; Either way, if the section has a '$' character, it is probably participating
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; in section sorting, and we should probably not put a redzone around it.
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; ModuleID = 't.c'
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source_filename = "t.c"
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc19.14.26430"
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$__pobjMapEntryFirst = comdat any
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$__pobjMapEntryMiddle = comdat any
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$__pobjMapEntryLast = comdat any
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$__crt_init_begin = comdat any
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$__crt_init_callback = comdat any
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$__crt_init_end = comdat any
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@__pobjMapEntryFirst = weak_odr dso_local constant i8* null, section "ATL$__a", comdat, align 8
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@__pobjMapEntryMiddle = weak_odr dso_local constant i8* null, section "ATL$__m", comdat, align 8
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@__pobjMapEntryLast = weak_odr dso_local constant i8* null, section "ATL$__z", comdat, align 8
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@__crt_init_begin = weak_odr dso_local constant i8* null, section ".CRT$XCA", comdat, align 8
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@__crt_init_callback = weak_odr dso_local constant i8* null, section ".CRT$XCU", comdat, align 8
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@__crt_init_end = weak_odr dso_local constant i8* null, section ".CRT$XCZ", comdat, align 8
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; CHECK: @__pobjMapEntryFirst = weak_odr dso_local constant i8* null, section "ATL$__a", comdat, align 8
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; CHECK: @__pobjMapEntryMiddle = weak_odr dso_local constant i8* null, section "ATL$__m", comdat, align 8
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; CHECK: @__pobjMapEntryLast = weak_odr dso_local constant i8* null, section "ATL$__z", comdat, align 8
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; CHECK: @__crt_init_begin = weak_odr dso_local constant i8* null, section ".CRT$XCA", comdat, align 8
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; CHECK: @__crt_init_callback = weak_odr dso_local constant i8* null, section ".CRT$XCU", comdat, align 8
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; CHECK: @__crt_init_end = weak_odr dso_local constant i8* null, section ".CRT$XCZ", comdat, align 8
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!llvm.asan.globals = !{!0, !2, !4, !6, !8, !10}
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!llvm.module.flags = !{!12, !13}
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!llvm.ident = !{!14}
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!0 = !{i8** @__pobjMapEntryFirst, !1, !"__pobjMapEntryFirst", i1 false, i1 false}
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!1 = !{!"t.c", i32 6, i32 61}
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!2 = !{i8** @__pobjMapEntryMiddle, !3, !"__pobjMapEntryMiddle", i1 false, i1 false}
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!3 = !{!"t.c", i32 7, i32 61}
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!4 = !{i8** @__pobjMapEntryLast, !5, !"__pobjMapEntryLast", i1 false, i1 false}
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!5 = !{!"t.c", i32 8, i32 61}
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!6 = !{i8** @__crt_init_begin, !7, !"__crt_init_begin", i1 false, i1 false}
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!7 = !{!"t.c", i32 16, i32 62}
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!8 = !{i8** @__crt_init_callback, !9, !"__crt_init_callback", i1 false, i1 false}
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!9 = !{!"t.c", i32 17, i32 62}
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!10 = !{i8** @__crt_init_end, !11, !"__crt_init_end", i1 false, i1 false}
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!11 = !{!"t.c", i32 18, i32 62}
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!12 = !{i32 1, !"wchar_size", i32 2}
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!13 = !{i32 7, !"PIC Level", i32 2}
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!14 = !{!"clang version 7.0.0 "}
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