#!/bin/bash -e
# tfault-run <tfault> <arg> <mustdie>
# run `<tfault> <arg>` and verify that it produces correct coredump, dieing for
#   SIGSEGV in function <mustdie>.

# die <msg> ...
die() {
    echo "E: $*" 1>&2
    exit 1
}

tfault=$(realpath $1)
arg=$2
mustdie=$3

# XXX ok to hardcode t/ ?
workdir=t/tfault-run.$arg

cwd=`pwd`
rm -rf "$workdir"
mkdir "$workdir"
cd "$workdir"

ulimit -c unlimited
$tfault $arg 2>&1 |tee run.out

grep -q "^# going to fault" run.out     || die "test didn't run to faulting point"
test -e core                            || die "no core after run"
gdb -q -batch $tfault core >core.info   || die "can't gdb(core)"
grep -q "Program terminated with signal SIGSEGV, Segmentation fault." core.info || die "not SIGSEGV"

# #0  0x00000000004031ae in doublefault_loadblk (file=0x7fff0f25d9c0, blk=0, buf=0x7ff85a553000) at t/tfault.c:93
diefunc=$(grep '^#0' core.info | awk '{print $4}')
test -n "$diefunc" || die "can't extract diefunc"

test "$diefunc" == "$mustdie"   || die "must die in $mustdie, died in $diefunc"


# run ok - cleanup
cd "$cwd"
rm -rf "$workdir"

echo "ok   - crashed OK  (in $diefunc)"