2 # (c) 2014, Sasha Levin <sasha.levin@oracle.com>
7 echo " $0 [vmlinux] [base path]"
16 # The structure of symbol at this point is:
17 # [name]+[offset]/[total length]
20 # do_basic_setup+0x9c/0xbf
23 # Strip the symbol name so that we could look it up
24 local name=${symbol%+*}
26 # Use 'nm vmlinux' to figure out the base address of said symbol.
27 # It's actually faster to call it every time than to load it
29 if [[ "${cache[$name]+isset}" == "isset" ]]; then
30 local base_addr=${cache[$name]}
32 local base_addr=$(nm "$vmlinux" | grep -i ' t ' | awk "/ $name\$/ {print \$1}" | head -n1)
33 cache["$name"]="$base_addr"
35 # Let's start doing the math to get the exact address into the
36 # symbol. First, strip out the symbol total length.
37 local expr=${symbol%/*}
39 # Now, replace the symbol name with the base address we found
41 expr=${expr/$name/0x$base_addr}
43 # Evaluate it to find the actual address
45 local address=$(printf "%x\n" "$expr")
47 # Pass it to addr2line to get filename and line number
48 # Could get more than one result
49 if [[ "${cache[$address]+isset}" == "isset" ]]; then
50 local code=${cache[$address]}
52 local code=$(addr2line -i -e "$vmlinux" "$address")
56 # addr2line doesn't return a proper error code if it fails, so
57 # we detect it using the value it prints so that we could preserve
58 # the offset/size into the function and bail out
59 if [[ $code == "??:0" ]]; then
63 # Strip out the base of the path
64 code=${code//$basepath/""}
66 # In the case of inlines, move everything to same line
67 code=${code//$'\n'/' '}
69 # Replace old address with pretty line numbers
70 symbol="$name ($code)"
74 local scripts=`dirname "${BASH_SOURCE[0]}"`
76 echo "$1" | $scripts/decodecode
85 # Remove hex numbers. Do it ourselves until it happens in the
88 # We need to know the index of the last element before we
89 # remove elements because arrays are sparse
90 local last=$(( ${#words[@]} - 1 ))
92 for i in "${!words[@]}"; do
94 if [[ ${words[$i]} =~ \[\<([^]]+)\>\] ]]; then
98 # Format timestamps with tabs
99 if [[ ${words[$i]} == \[ && ${words[$i+1]} == *\] ]]; then
101 words[$i+1]=$(printf "[%13s\n" "${words[$i+1]}")
105 # The symbol is the last element, process it
106 symbol=${words[$last]}
108 parse_symbol # modifies $symbol
110 # Add up the line number to the symbol
111 echo "${words[@]}" "$symbol"
115 # Let's see if we have an address in the line
116 if [[ $line =~ \[\<([^]]+)\>\] ]]; then
117 # Translate address to line numbers
120 elif [[ $line == *Code:* ]]; then
123 # Nothing special in this line, show it as is