diff options
Diffstat (limited to 'lib/gwp_asan/scripts/symbolize.sh')
-rwxr-xr-x | lib/gwp_asan/scripts/symbolize.sh | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/gwp_asan/scripts/symbolize.sh b/lib/gwp_asan/scripts/symbolize.sh new file mode 100755 index 000000000000..fad9620a676e --- /dev/null +++ b/lib/gwp_asan/scripts/symbolize.sh @@ -0,0 +1,55 @@ +#!/bin/bash + +# The lines that we're looking to symbolize look like this: + #0 ./a.out(_foo+0x3e6) [0x55a52e64c696] +# ... which come from the backtrace_symbols() symbolisation function used by +# default in Scudo's implementation of GWP-ASan. + +while read -r line; do + # Check that this line needs symbolization. + should_symbolize="$(echo $line |\ + grep -E '^[ ]*\#.*\(.*\+0x[0-9a-f]+\) \[0x[0-9a-f]+\]$')" + + if [ -z "$should_symbolize" ]; then + echo "$line" + continue + fi + + # Carve up the input line into sections. + binary_name="$(echo $line | grep -oE ' .*\(' | rev | cut -c2- | rev |\ + cut -c2-)" + function_name="$(echo $line | grep -oE '\([^+]*' | cut -c2-)" + function_offset="$(echo $line | grep -oE '\(.*\)' | grep -oE '\+.*\)' |\ + cut -c2- | rev | cut -c2- | rev)" + frame_number="$(echo $line | grep -oE '\#[0-9]+ ')" + + if [ -z "$function_name" ]; then + # If the offset is binary-relative, just resolve that. + symbolized="$(echo $function_offset | addr2line -e $binary_name)" + else + # Otherwise, the offset is function-relative. Get the address of the + # function, and add it to the offset, then symbolize. + function_addr="0x$(echo $function_offset |\ + nm --defined-only $binary_name 2> /dev/null |\ + grep -E " $function_name$" | cut -d' ' -f1)" + + # Check that we could get the function address from nm. + if [ -z "$function_addr" ]; then + echo "$line" + continue + fi + + # Add the function address and offset to get the offset into the binary. + binary_offset="$(printf "0x%X" "$((function_addr+function_offset))")" + symbolized="$(echo $binary_offset | addr2line -e $binary_name)" + fi + + # Check that it symbolized properly. If it didn't, output the old line. + echo $symbolized | grep -E ".*\?.*:" > /dev/null + if [ "$?" -eq "0" ]; then + echo "$line" + continue + else + echo "${frame_number}${symbolized}" + fi +done |