[PATCH v9 17/27] scripts: decode_stacktrace: demangle Rust symbols

Miguel Ojeda
2022-08-05T15:46:18Z

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

Reviewed-by: Kees Cook <keescook@chromium.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>
---
scripts/decode_stacktrace.sh | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/scripts/decode_stacktrace.sh b/scripts/decode_stacktrace.sh
index 7075e26ab2c4..564c5632e1a2 100755
--- a/scripts/decode_stacktrace.sh
+++ b/scripts/decode_stacktrace.sh
@@ -8,6 +8,14 @@ usage() {
echo " $0 -r <release> | <vmlinux> [ |auto] [<modules path>]"
}

+# 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 [[ $1 == "-r" ]] ; then
vmlinux=""
basepath="auto"
@@ -180,6 +188,12 @@ parse_symbol() {
# In the case of inlines, move everything to same line
code=${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)"
}
--
2.37.1