Welcome callygraphs.sh

Signed-off-by: hax <hax@lainlounge.xyz>

callygraphs.sh

@@ -0,0 +1,126 @@
+#! /usr/bin/env bash
+# Reserved for future comments ...
+# 
+#
+#
+# --------------------------------
+
+prog_name="callygraphs"
+
+if [ $# -lt 1 ]; then
+    echo "Usage: $prog_name EXECUTABLE [ARGS...]"
+    echo
+    echo "Example: $prog_name ~/bin/test-program foo 23"
+    exit 1
+fi
+
+# Sanity checks.
+FILE=$1
+
+if [ ! -x $FILE ]; then
+    echo "$prog_name: Unable to find executable '$FILE'"
+    exit 1
+fi
+
+LANG="" gdb --eval-command=quit $FILE 2>&1 \
+    | grep -E '(no\ debugging\ symbols\ found|not\ in\ executable\ format)' 2>&1 > /dev/null
+if [ $? -eq 0 ]; then
+    echo -n "$prog_name: Can't print call graph for '$FILE' because it's not a "
+    echo "binary executable compiled with debugging symbols."
+    exit 1;
+fi
+
+shift
+
+# Set up temporary files.
+TRACE="`mktemp -t $prog_name.XXXXXXXXXX`" || exit
+GETFUNCS="`mktemp -t $prog_name.XXXXXXXXXX`" || exit
+trap 'rm -f -- "$TRACE" "$GETFUNCS"' EXIT
+trap 'trap - EXIT; rm -f -- "$TRACE" "$GETFUNCS"; exit 1' HUP INT QUIT TERM
+
+# Take control of GDB and print call graph.
+cat > $GETFUNCS <<EOF
+set height 0
+info functions
+EOF
+
+gdb --batch --command=$GETFUNCS $FILE 2>/dev/null | awk '
+function get_func_name(str)
+{
+  split(str, part, "(");
+  len = split(part[1], part, " ");
+  len = split(part[len], part, "*");
+
+  return part[len];
+}
+
+BEGIN {
+  total = 0;
+  print "set width 0";
+  print "set height 0";
+  print "set verbose off";
+}
+
+/[a-zA-Z_][a-zA-Z0-9_]*\(/ {
+  fn = get_func_name($0);
+  printf("break %s\n", fn);
+  ++total;
+}
+
+END {
+  for (i = 1; i <= total; i++) {
+    print "commands", i;
+    /* print "info args"; */
+    print "backtrace 2";
+    print "continue";
+    print "end";
+  }
+
+  print "run"
+}
+' > $TRACE
+
+gdb --batch --command=$TRACE --tty=/dev/null --args $FILE $@ 2>/dev/null | awk '
+function get_callee(s)
+{
+  split(s, info, ",");
+  split(info[2], fn, " ");
+  callee = fn[1];
+
+  return callee;
+}
+
+function get_params(s, n)
+{
+  split(s, par, n);
+  split(par[2], par, " at ");
+  sub(/ \(/, "(", par[1]);
+
+  return par[1];
+}
+
+BEGIN {
+  isrecord = 0;
+  callee = "";
+  caller = "*INITIAL*";
+  params = "";
+}
+
+/^Breakpoint [0-9]+,/ {
+  isrecord = 1;
+
+  callee = get_callee($0);
+  params = get_params($0, callee);
+}
+
+/^#1[ \t]+/ {
+  if (isrecord)
+    caller = $4;
+}
+
+/^$/ {
+  if (isrecord && (caller != "*INITIAL*")) {
+    printf("%s %s %s\n", caller, callee, params);
+    callee = caller = params = "";
+  }
+}