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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
20 lines
1.1 KiB
C++
20 lines
1.1 KiB
C++
/// -mframe-pointer=none sets the module flag "frame-pointer" (merge behavior: max).
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/// asan synthesized ctor/dtor get the "frame-pointer" function attribute if not zero (default).
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// RUN: %clang_cc1 -emit-llvm -fsanitize=address -mframe-pointer=none %s -o - | FileCheck %s --check-prefix=NONE
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// RUN: %clang_cc1 -emit-llvm -fsanitize=address -mframe-pointer=non-leaf %s -o - | FileCheck %s --check-prefix=NONLEAF
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// RUN: %clang_cc1 -emit-llvm -fsanitize=address -mframe-pointer=all %s -o - | FileCheck %s --check-prefix=ALL
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int global;
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// NONE: define internal void @asan.module_ctor() #[[#ATTR:]] {
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// NONE: define internal void @asan.module_dtor() #[[#ATTR]] {
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// NONE: attributes #[[#ATTR]] = { nounwind }
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// NONLEAF: define internal void @asan.module_ctor() #[[#ATTR:]] {
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// NONLEAF: define internal void @asan.module_dtor() #[[#ATTR]] {
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// NONLEAF: attributes #[[#ATTR]] = { nounwind "frame-pointer"="non-leaf" }
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// ALL: define internal void @asan.module_ctor() #[[#ATTR:]] {
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// ALL: define internal void @asan.module_dtor() #[[#ATTR]] {
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// ALL: attributes #[[#ATTR]] = { nounwind "frame-pointer"="all" }
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