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scripts: decode_stacktrace: demangle Rust symbols

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[ Upstream commit 99115db4ec ]

Recent versions of both Binutils (`c++filt`) and LLVM (`llvm-cxxfilt`)
provide Rust v0 mangling support.

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Co-developed-by: Alex Gaynor <alex.gaynor@gmail.com>
Signed-off-by: Alex Gaynor <alex.gaynor@gmail.com>
Co-developed-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Wedson Almeida Filho <wedsonaf@google.com>
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Stable-dep-of: efbd639835 ("scripts/decode_stacktrace.sh: optionally use LLVM utilities")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Miguel Ojeda 2021-12-05 19:00:43 +01:00 committed by Greg Kroah-Hartman
parent a3d71b6ae9
commit 0f906882eb
1 changed files with 14 additions and 0 deletions
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14
scripts/decode_stacktrace.sh
View file

@ -9,6 +9,14 @@ if [[ $# < 1 ]]; then
exit 1
fi
# Try to find a Rust demangler
if type llvm-cxxfilt >/dev/null 2>&1 ; then
cppfilt=llvm-cxxfilt
elif type c++filt >/dev/null 2>&1 ; then
cppfilt=c++filt
cppfilt_opts=-i
fi
if [[ $1 == "-r" ]] ; then
vmlinux=""
basepath="auto"
@ -157,6 +165,12 @@ parse_symbol() {
# In the case of inlines, move everything to same line
code=${code//$'\n'/' '}
# Demangle if the name looks like a Rust symbol and if
# we got a Rust demangler
if [[ $name =~ ^_R && $cppfilt != "" ]] ; then
name=$("$cppfilt" "$cppfilt_opts" "$name")
fi
# Replace old address with pretty line numbers
symbol="$segment$name ($code)"
}