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#!/bin/sh
# this function is slight modification of the one used in RPM
# found at https://bugzilla.redhat.com/show_bug.cgi?id=834073
# written by Alexander Larsson <alexl@redhat.com>
add_minidebug()
{
debuginfo="$1" ## we don't have separate debuginfo file
binary="$1"
dynsyms=`mktemp`
funcsyms=`mktemp`
keep_symbols=`mktemp`
mini_debuginfo=`mktemp`
# Extract the dynamic symbols from the main binary, there is no need to also have these
# in the normal symbol table
nm -D "$binary" --format=posix --defined-only | awk '{ print $1 }' | sort > "$dynsyms"
# Extract all the text (i.e. function) symbols from the debuginfo
nm "$debuginfo" --format=posix --defined-only | awk '{ if ($2 == "T" || $2 == "t") print $1 }' | sort > "$funcsyms"
# Keep all the function symbols not already in the dynamic symbol table
comm -13 "$dynsyms" "$funcsyms" > "$keep_symbols"
# Copy the full debuginfo, keeping only a minumal set of symbols and removing some unnecessary sections
objcopy -S --remove-section .gdb_index --remove-section .comment --keep-symbols="$keep_symbols" "$debuginfo" "$mini_debuginfo" &> /dev/null
wait
#Inject the compressed data into the .gnu_debugdata section of the original binary
xz "$mini_debuginfo"
mini_debuginfo="${mini_debuginfo}.xz"
objcopy --add-section .gnu_debugdata="$mini_debuginfo" "$binary"
rm -f "$dynsyms" "$funcsyms" "$keep_symbols" "$mini_debuginfo"
strip "$binary" ## throw away the symbol table
}
TESTDIR=`pwd`
TEMPDIR=`mktemp --tmpdir -d libunwind-test-XXXXXXXXXX`
trap "rm -r -- $TEMPDIR" EXIT
cp crasher $TEMPDIR/crasher
if [ "$1" = "-minidebuginfo" ]; then
add_minidebug $TEMPDIR/crasher
fi
# create core dump
(
cd $TEMPDIR
ulimit -c 10000
./crasher backing_files
) 2>/dev/null
COREFILE=$TEMPDIR/core*
# magic option -testcase enables checking for the specific contents of the stack
./test-coredump-unwind $COREFILE -testcase `cat $TEMPDIR/backing_files`
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