coredump: add test

Program test-coredump-unwind was modified to map backing files based on
virtual addresses instead of segment numbers.

The crasher.c is a program that essentially calls some functions and
then writes to invalid address causing a crash. Before that, it detects
which executables are mapped to which virtual addresses and writes this
information to a file suitable for consumption by test-coredump-unwind.
The mapping information is obtained form /proc/self/maps, so currently
it only works on linux.

The test itself is a shell script, which first runs the program and then
runs test-coredump-unwind on the resulting core and address space
map file to check whether the stack trace obtained from the dump roughly
corresponds to what it should look like.

Signed-off-by: Martin Milata <mmilata@redhat.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/run-coredump-unwind b/tests/run-coredump-unwind
new file mode 100755
index 00000000..18060c51
--- /dev/null
+++ b/tests/run-coredump-unwind
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+TESTDIR=`pwd`
+TEMPDIR=`mktemp -d`
+
+# create core dump
+(
+    cd $TEMPDIR
+    ulimit -c 10000
+    $TESTDIR/crasher $TEMPDIR/backing_files
+) 2>/dev/null
+COREFILE=$TEMPDIR/core*
+
+# fail if any command fails
+set -e
+
+# magic option -testcase enables checking for the specific contents of the stack
+./test-coredump-unwind $COREFILE -testcase `cat $TEMPDIR/backing_files`
+
+rm -r -- $TEMPDIR