]>
git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - scripts/decode_stacktrace.sh
2 # (c) 2014, Sasha Levin <sasha.levin@oracle.com>
7 echo " $0 [vmlinux] [base path] [modules path]"
18 # The structure of symbol at this point is:
19 # ([name]+[offset]/[total length])
22 # do_basic_setup+0x9c/0xbf
24 if [[ $module == "" ]] ; then
25 local objfile
=$vmlinux
26 elif [[ "${modcache[$module]+isset}" == "isset" ]]; then
27 local objfile
=${modcache[$module]}
29 [[ $modpath == "" ]] && return
30 local objfile
=$
(find "$modpath" -name $module.ko
-print -quit)
31 [[ $objfile == "" ]] && return
32 modcache
[$module]=$objfile
35 # Remove the englobing parenthesis
39 # Strip the symbol name so that we could look it up
40 local name
=${symbol%+*}
42 # Use 'nm vmlinux' to figure out the base address of said symbol.
43 # It's actually faster to call it every time than to load it
45 if [[ "${cache[$module,$name]+isset}" == "isset" ]]; then
46 local base_addr
=${cache[$module,$name]}
48 local base_addr
=$
(nm
"$objfile" |
grep -i ' t ' |
awk "/ $name\$/ {print \$1}" |
head -n1)
49 cache
[$module,$name]="$base_addr"
51 # Let's start doing the math to get the exact address into the
52 # symbol. First, strip out the symbol total length.
53 local expr=${symbol%/*}
55 # Now, replace the symbol name with the base address we found
57 expr=${expr/$name/0x$base_addr}
59 # Evaluate it to find the actual address
61 local address
=$
(printf "%x\n" "$expr")
63 # Pass it to addr2line to get filename and line number
64 # Could get more than one result
65 if [[ "${cache[$module,$address]+isset}" == "isset" ]]; then
66 local code
=${cache[$module,$address]}
68 local code
=$
(addr2line
-i -e "$objfile" "$address")
69 cache
[$module,$address]=$code
72 # addr2line doesn't return a proper error code if it fails, so
73 # we detect it using the value it prints so that we could preserve
74 # the offset/size into the function and bail out
75 if [[ $code == "??:0" ]]; then
79 # Strip out the base of the path
80 code
=${code//$basepath/""}
82 # In the case of inlines, move everything to same line
83 code
=${code//$'\n'/' '}
85 # Replace old address with pretty line numbers
86 symbol
="$name ($code)"
90 local scripts
=`dirname "${BASH_SOURCE[0]}"`
92 echo "$1" |
$scripts/decodecode
101 # Remove hex numbers. Do it ourselves until it happens in the
104 # We need to know the index of the last element before we
105 # remove elements because arrays are sparse
106 local last
=$
(( ${#words[@]} - 1 ))
108 for i
in "${!words[@]}"; do
110 if [[ ${words[$i]} =~ \
[\
<([^
]]+)\
>\
] ]]; then
114 # Format timestamps with tabs
115 if [[ ${words[$i]} == \
[ && ${words[$i+1]} == *\
] ]]; then
117 words
[$i+1]=$
(printf "[%13s\n" "${words[$i+1]}")
121 if [[ ${words[$last]} =~ \
[([^
]]+)\
] ]]; then
122 module
=${words[$last]}
125 symbol
=${words[$last-1]}
128 # The symbol is the last element, process it
129 symbol
=${words[$last]}
134 parse_symbol
# modifies $symbol
136 # Add up the line number to the symbol
137 echo "${words[@]}" "$symbol $module"
141 # Let's see if we have an address in the line
142 if [[ $line =~ \
[\
<([^
]]+)\
>\
] ]] ||
143 [[ $line =~
[^
+\
]+\
+0x
[0-9a-f]+/0x
[0-9a-f]+ ]]; then
144 # Translate address to line numbers
147 elif [[ $line == *Code
:* ]]; then
150 # Nothing special in this line, show it as is