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scripts/decode_stacktrace.sh: support old bash version 

Old bash version don't support associative array variables.  Avoid to use
associative array variables to avoid error.

Without this, old bash version will report error as fellowing
[   15.954042] Kernel panic - not syncing: sysrq triggered crash
[   15.955252] CPU: 1 PID: 167 Comm: sh Not tainted 5.18.0-rc1-00208-gb7d075db2fd5 #4
[   15.956472] Hardware name: Hobot J5 Virtual development board (DT)
[   15.957856] Call trace:
./scripts/decode_stacktrace.sh: line 128: ,dump_backtrace: syntax error: operand expected (error token is ",dump_backtrace")

Link: https://lkml.kernel.org/r/20220409180331.24047-1-schspa@gmail.com
Signed-off-by: Schspa Shi <schspa@gmail.com>
Cc: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Schspa Shi 2022-04-29 14:37:57 -07:00 committed by akpm
parent bd7155a028
commit 3af8acf6af
1 changed files with 19 additions and 8 deletions
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27
scripts/decode_stacktrace.sh
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@ -45,8 +45,13 @@ else
fi
fi
declare -A cache
declare -A modcache
declare aarray_support=true
declare -A cache 2>/dev/null
if [[ $? != 0 ]]; then
aarray_support=false
else
declare -A modcache
fi
find_module() {
if [[ -n $debuginfod ]] ; then
@ -97,7 +102,7 @@ parse_symbol() {
if [[ $module == "" ]] ; then
local objfile=$vmlinux
elif [[ "${modcache[$module]+isset}" == "isset" ]]; then
elif [[ $aarray_support == true && "${modcache[$module]+isset}" == "isset" ]]; then
local objfile=${modcache[$module]}
else
local objfile=$(find_module)
@ -105,7 +110,9 @@ parse_symbol() {
echo "WARNING! Modules path isn't set, but is needed to parse this symbol" >&2
return
fi
modcache[$module]=$objfile
if [[ $aarray_support == true ]]; then
modcache[$module]=$objfile
fi
fi
# Remove the englobing parenthesis
@ -125,7 +132,7 @@ parse_symbol() {
# Use 'nm vmlinux' to figure out the base address of said symbol.
# It's actually faster to call it every time than to load it
# all into bash.
if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then
if [[ $aarray_support == true && "${cache[$module,$name]+isset}" == "isset" ]]; then
local base_addr=${cache[$module,$name]}
else
local base_addr=$(nm "$objfile" 2>/dev/null | awk '$3 == "'$name'" && ($2 == "t" || $2 == "T") {print $1; exit}')
@ -133,7 +140,9 @@ parse_symbol() {
# address not found
return
fi
cache[$module,$name]="$base_addr"
if [[ $aarray_support == true ]]; then
cache[$module,$name]="$base_addr"
fi
fi
# Let's start doing the math to get the exact address into the
# symbol. First, strip out the symbol total length.
@ -149,11 +158,13 @@ parse_symbol() {
# Pass it to addr2line to get filename and line number
# Could get more than one result
if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then
if [[ $aarray_support == true && "${cache[$module,$address]+isset}" == "isset" ]]; then
local code=${cache[$module,$address]}
else
local code=$(${CROSS_COMPILE}addr2line -i -e "$objfile" "$address" 2>/dev/null)
cache[$module,$address]=$code
if [[ $aarray_support == true ]]; then
cache[$module,$address]=$code
fi
fi
# addr2line doesn't return a proper error code if it fails, so