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scripts/decode_stacktrace.sh: handle symbols in modules
scripts/decode_stacktrace.sh presently displays module symbols as func+0x0ff/0x5153 [module] Add a third argument: the pathname of a directory where the script should look for the file module.ko so that the output appears as func (foo/bar.c:123) module Without the argument or if the module file isn't found the script prints such symbols as is without decoding. Signed-off-by: Konstantin Khlebnikov <[email protected]> Cc: Sasha Levin <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -2,15 +2,17 @@ | |
| # (c) 2014, Sasha Levin <[email protected]> | ||
| #set -x | ||
|
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||
| if [[ $# != 2 ]]; then | ||
| if [[ $# < 2 ]]; then | ||
| echo "Usage:" | ||
| echo " $0 [vmlinux] [base path]" | ||
| echo " $0 [vmlinux] [base path] [modules path]" | ||
| exit 1 | ||
| fi | ||
|
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||
| vmlinux=$1 | ||
| basepath=$2 | ||
| modpath=$3 | ||
| declare -A cache | ||
| declare -A modcache | ||
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||
| parse_symbol() { | ||
| # The structure of symbol at this point is: | ||
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@@ -19,6 +21,17 @@ parse_symbol() { | |
| # For example: | ||
| # do_basic_setup+0x9c/0xbf | ||
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||
| if [[ $module == "" ]] ; then | ||
| local objfile=$vmlinux | ||
| elif [[ "${modcache[$module]+isset}" == "isset" ]]; then | ||
| local objfile=${modcache[$module]} | ||
| else | ||
| [[ $modpath == "" ]] && return | ||
| local objfile=$(find "$modpath" -name $module.ko -print -quit) | ||
| [[ $objfile == "" ]] && return | ||
| modcache[$module]=$objfile | ||
| fi | ||
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||
| # Remove the englobing parenthesis | ||
| symbol=${symbol#\(} | ||
| symbol=${symbol%\)} | ||
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@@ -29,11 +42,11 @@ 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 [[ "${cache[$name]+isset}" == "isset" ]]; then | ||
| local base_addr=${cache[$name]} | ||
| if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then | ||
| local base_addr=${cache[$module,$name]} | ||
| else | ||
| local base_addr=$(nm "$vmlinux" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1) | ||
| cache["$name"]="$base_addr" | ||
| local base_addr=$(nm "$objfile" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1) | ||
| cache[$module,$name]="$base_addr" | ||
| fi | ||
| # Let's start doing the math to get the exact address into the | ||
| # symbol. First, strip out the symbol total length. | ||
|
|
@@ -48,12 +61,12 @@ parse_symbol() { | |
| local address=$(printf "%x\n" "$expr") | ||
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||
| # Pass it to addr2line to get filename and line number | ||
| # Could get more than one result | ||
| if [[ "${cache[$address]+isset}" == "isset" ]]; then | ||
| local code=${cache[$address]} | ||
| # Could get more than one result | ||
| if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then | ||
| local code=${cache[$module,$address]} | ||
| else | ||
| local code=$(addr2line -i -e "$vmlinux" "$address") | ||
| cache[$address]=$code | ||
| local code=$(addr2line -i -e "$objfile" "$address") | ||
| cache[$module,$address]=$code | ||
| fi | ||
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||
| # addr2line doesn't return a proper error code if it fails, so | ||
|
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@@ -105,13 +118,23 @@ handle_line() { | |
| fi | ||
| done | ||
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||
| # The symbol is the last element, process it | ||
| symbol=${words[$last]} | ||
| if [[ ${words[$last]} =~ \[([^]]+)\] ]]; then | ||
| module=${words[$last]} | ||
| module=${module#\[} | ||
| module=${module%\]} | ||
| symbol=${words[$last-1]} | ||
| unset words[$last-1] | ||
| else | ||
| # The symbol is the last element, process it | ||
| symbol=${words[$last]} | ||
| module= | ||
| fi | ||
|
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||
| unset words[$last] | ||
| parse_symbol # modifies $symbol | ||
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| # Add up the line number to the symbol | ||
| echo "${words[@]}" "$symbol" | ||
| echo "${words[@]}" "$symbol $module" | ||
| } | ||
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| while read line; do | ||
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@@ -121,8 +144,8 @@ while read line; do | |
| handle_line "$line" | ||
| # Is it a code line? | ||
| elif [[ $line == *Code:* ]]; then | ||
| decode_code "$line" | ||
| else | ||
| decode_code "$line" | ||
| else | ||
| # Nothing special in this line, show it as is | ||
| echo "$line" | ||
| fi | ||
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