https://bugs.llvm.org/show_bug.cgi?id=43141
Bug ID: 43141
Summary: x86 gcov functions lack frame pointer setup
Product: clang
Version: 8.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: a...@linaro.org
CC: htmldevelo...@gmail.com, llvm-bugs@lists.llvm.org,
neeil...@live.com, richard-l...@metafoo.co.uk
When building an x86 Linux kernel with both CONFIG_FRAME_POINTER and
CONFIG_GCOV_PROFILE_ALL set, objtool complains about every object
file:
mm/kasan/common.o: warning: objtool: __llvm_gcov_writeout()+0x14: call without
frame pointer save/setup
mm/kasan/common.o: warning: objtool: __llvm_gcov_flush()+0x0: call without
frame pointer save/setup
These two functions are inserted into each file but lack code to handle the
frame pointer when compiling with -fno-omit-frame-pointer -fprofile-arcs.
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