MiniDebugInfo test: tests/run-coredump-unwind-mdi

Test that creates MiniDebugInfo-containing binary and then checks if it
can recover the procedure names from its coredump.

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

1 files changed, 38 insertions, 1 deletions

diff --git a/tests/run-coredump-unwind b/tests/run-coredump-unwind
index d6dd7e03..8d077425 100755
--- a/tests/run-coredump-unwind
+++ b/tests/run-coredump-unwind
@@ -1,14 +1,51 @@
 #!/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
+  #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
-    $TESTDIR/crasher $TEMPDIR/backing_files
+    ./crasher backing_files
 ) 2>/dev/null
 COREFILE=$TEMPDIR/core*