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Reapply r185872 now that the address sanitizer has been changed to support this.
Original commit message: Stop emitting weak symbols into the "coal" sections. The Mach-O linker has been able to support the weak-def bit on any symbol for quite a while now. The compiler however continued to place these symbols into a "coal" section, which required the linker to map them back to the base section name. Replace the sections like this: __TEXT/__textcoal_nt instead use __TEXT/__text __TEXT/__const_coal instead use __TEXT/__const __DATA/__datacoal_nt instead use __DATA/__data <rdar://problem/14265330> git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187939 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -524,14 +524,14 @@ const MCSection *TargetLoweringObjectFileMachO::
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SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler *Mang, const TargetMachine &TM) const {
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if (Kind.isText())
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return GV->isWeakForLinker() ? TextCoalSection : TextSection;
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// If this is weak/linkonce, put this in a coalescable section, either in text
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// or data depending on if it is writable.
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return TextSection;
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// If this is weak/linkonce, put this in a read only or data section depending
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// on whether or not it's writable.
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if (GV->isWeakForLinker()) {
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if (Kind.isReadOnly())
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return ConstTextCoalSection;
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return DataCoalSection;
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return ReadOnlySection;
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return DataSection;
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}
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// FIXME: Alignment check should be handled by section classifier.
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@ -20,7 +20,7 @@
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; TODO: linux drops this into .rodata, we drop it into ".gnu.linkonce.r.G2"
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; DARWIN: .section __TEXT,__const_coal,coalesced
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; DARWIN: .section __TEXT,__const{{$}}
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; DARWIN: _G2:
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; DARWIN: .long 42
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@ -70,7 +70,6 @@
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; LINUX: .weak foo_20_bar
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; LINUX: foo_20_bar:
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; DARWIN: .section __DATA,__datacoal_nt,coalesced
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; DARWIN: .globl "_foo bar"
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; DARWIN: .weak_definition "_foo bar"
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; DARWIN: "_foo bar":
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@ -85,7 +84,7 @@
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; LINUX: .byte 1
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; LINUX: .size G6, 1
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; DARWIN: .section __TEXT,__const_coal,coalesced
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; DARWIN: .section __TEXT,__const{{$}}
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; DARWIN: .globl _G6
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; DARWIN: .weak_definition _G6
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; DARWIN:_G6:
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@ -131,7 +130,7 @@
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@G10 = weak global [100 x i32] zeroinitializer, align 32 ; <[100 x i32]*> [#uses=0]
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; DARWIN: .section __DATA,__datacoal_nt,coalesced
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; DARWIN: .section __DATA,__data{{$}}
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; DARWIN: .globl _G10
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; DARWIN: .weak_definition _G10
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; DARWIN: .align 5
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