scripts: handle kernel backtraces with bt-akaros.sh
Signed-off-by: Barret Rhoden <brho@cs.berkeley.edu>
diff --git a/scripts/bt-akaros.sh b/scripts/bt-akaros.sh
index 97ce8c9..d1b13b0 100755
--- a/scripts/bt-akaros.sh
+++ b/scripts/bt-akaros.sh
@@ -1,39 +1,58 @@
#!/bin/bash
# Barret Rhoden (brho@cs.berkeley.edu)
#
-# Resolves functions from an Akaros user backtrace.
+# Resolves functions from Akaros backtraces, both user and kernel.
# Pipe a backtrace (echo "huge-copy-paste" | ./thisfile.sh) to it.
#
-# Be sure to set your environment paths for the SOLIBS and BIN, or use the
-# defaults, which require AKAROS_ROOT.
+# There are a few environment variables you may want to override, which control
+# the location of the binaries and libraries. If you use AKAROS_ROOT, KFS, and
+# x86, just stick with the defaults.
: ${SOLIBS_PREFIX:=$AKAROS_ROOT/kern/kfs/lib/}
: ${SO_REGEX:=.*so$}
: ${BIN_PREFIX:=$AKAROS_ROOT/kern/kfs/bin/}
+: ${KERNEL_BINARY:=$AKAROS_ROOT/obj/kern/akaros-kernel-64b}
# takes the path to the binary and offset (offset in hex), prints name of the
# function where the offset is in the binary. basically a wrapper for
# addr2line.
-function print_func()
-{
+print_user_func() {
addr2line -e $1 -fC $2 | xargs
}
-while read line
-do
+kernel_line() {
+ line=$1
+
+ addr=`echo $line | cut -c 7-25`
+
+ echo -n $line " "
+ # sed cleans out build paths. All kernel files have 'kern', unlike
+ # arbitrary user binaries.
+ addr2line -e $KERNEL_BINARY $addr | sed 's/^.*kern\//at kern\//'
+}
+
+user_line() {
+ line=$1
+
binary=`echo $line | cut -f 6 -d ' '`
lib_off=`echo $line | cut -f 9 -d ' '`
app_off=`echo $line | cut -f 3 -d ' '`
- if [[ $binary == "" ]]
- then
- break
- fi
+
echo -n $line " "
- if [[ $binary =~ $SO_REGEX ]]
- then
- # could also do addr=$(print_func $lib $off)
- print_func $SOLIBS_PREFIX/$binary $lib_off
+ if [[ $binary =~ $SO_REGEX ]]; then
+ # could also do addr=$(print_user_func $lib $off)
+ print_user_func $SOLIBS_PREFIX/$binary $lib_off
else
- print_func $BIN_PREFIX/$binary $app_off
+ print_user_func $BIN_PREFIX/$binary $app_off
+ fi
+}
+
+while read line; do
+ fifth_char=`echo $line | cut -c 5`
+
+ if [[ $fifth_char == "[" ]]; then
+ kernel_line "$line"
+ elif [[ $fifth_char == "A" ]]; then
+ user_line "$line"
fi
done
