2786e673c7
The Linux kernel objtool diagnostic `call without frame pointer save/setup` arise in multiple instrumentation passes (asan/tsan/gcov). With the mechanism introduced in D100251, it's trivial to respect the command line -m[no-]omit-leaf-frame-pointer/-f[no-]omit-frame-pointer, so let's do it. Fix: https://github.com/ClangBuiltLinux/linux/issues/1236 (tsan) Fix: https://github.com/ClangBuiltLinux/linux/issues/1238 (asan) Also document the function attribute "frame-pointer" which is long overdue. Differential Revision: https://reviews.llvm.org/D101016
25 lines
668 B
LLVM
25 lines
668 B
LLVM
; RUN: opt < %s -passes='asan-pipeline' -S | FileCheck %s
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target triple = "x86_64-unknown-linux-gnu"
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@g = dso_local global i32 0, align 4
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define i32 @test_load() sanitize_address {
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entry:
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%tmp = load i32, i32* @g, align 4
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ret i32 %tmp
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}
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!llvm.module.flags = !{!0, !1}
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;; Due to -fasynchronous-unwind-tables.
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!0 = !{i32 7, !"uwtable", i32 1}
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;; Due to -fno-omit-frame-pointer.
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!1 = !{i32 7, !"frame-pointer", i32 2}
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;; Set the uwtable attribute on ctor/dtor.
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; CHECK: define internal void @asan.module_ctor() #[[#ATTR:]]
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; CHECK: define internal void @asan.module_dtor() #[[#ATTR]]
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; CHECK: attributes #[[#ATTR]] = { nounwind uwtable "frame-pointer"="all" }
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