[PATCH v2 36/36] Guile extension language: section script tests

[Doug Evans <xdje42 at gmail dot com>]

This patch adds tests for using the .debug_gdb_scripts section.

2014-01-20  Doug Evans  <xdje42@gmail.com>

	testsuite/
	* gdb.guile/scm-section-script.c: New file.
	* gdb.guile/scm-section-script.exp: New file.
	* gdb.guile/scm-section-script.scm: New file.

diff --git a/gdb/testsuite/gdb.guile/scm-section-script.c b/gdb/testsuite/gdb.guile/scm-section-script.c
new file mode 100644
index 0000000..8a1ede9
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-section-script.c
@@ -0,0 +1,55 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+   Copyright 2010-2014 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "symcat.h"
+#include "gdb/section-scripts.h"
+
+/* Put the path to the pretty-printer script in .debug_gdb_scripts so
+   gdb will automagically loaded it.  */
+
+#define DEFINE_GDB_SCRIPT(script_name) \
+  asm("\
+.pushsection \".debug_gdb_scripts\", \"MS\",@progbits,1\n\
+.byte " XSTRING (SECTION_SCRIPT_ID_SCHEME_FILE) "\n\
+.asciz \"" script_name "\"\n\
+.popsection \n\
+");
+
+DEFINE_GDB_SCRIPT (SCRIPT_FILE)
+
+struct ss
+{
+  int a;
+  int b;
+};
+
+void
+init_ss (struct ss *s, int a, int b)
+{
+  s->a = a;
+  s->b = b;
+}
+
+int
+main ()
+{
+  struct ss ss;
+
+  init_ss (&ss, 1, 2);
+
+  return 0;      /* break to inspect struct and union */
+}
diff --git a/gdb/testsuite/gdb.guile/scm-section-script.exp b/gdb/testsuite/gdb.guile/scm-section-script.exp
new file mode 100644
index 0000000..0c5e489
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-section-script.exp
@@ -0,0 +1,80 @@
+# Copyright (C) 2010-2014 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# This file is part of the GDB testsuite.  It tests automagic loading of
+# scripts specified in the .debug_gdb_scripts section.
+
+# This test can only be run on targets which support ELF and use gas.
+# For now pick a sampling of likely targets.
+if {![istarget *-*-linux*]
+    && ![istarget *-*-gnu*]
+    && ![istarget *-*-elf*]
+    && ![istarget *-*-openbsd*]
+    && ![istarget arm*-*-eabi*]
+    && ![istarget arm*-*-symbianelf*]
+    && ![istarget powerpc-*-eabi*]} {
+    verbose "Skipping scm-section-script.exp because of lack of support."
+    return
+}
+
+load_lib gdb-guile.exp
+
+standard_testfile
+
+# Make this available to gdb before the program starts, it is
+# automagically loaded by gdb.
+# Give the file a new name so we don't clobber the real one if
+# objfile == srcdir.
+# We also need to do this before compiling the program because the name
+# of the script file is encoded in the binary.
+# FIXME: Can we get gdb_remote_download to call standard_output_file for us?
+set remote_guile_file [gdb_remote_download host \
+			   ${srcdir}/${subdir}/${testfile}.scm \
+			   ${subdir}/t-${testfile}.scm]
+
+if {[build_executable $testfile.exp $testfile $srcfile \
+	[list debug "additional_flags=-I${srcdir}/../../include -DSCRIPT_FILE=\"$remote_guile_file\""]] == -1} {
+    return
+}
+
+# Start with a fresh gdb.
+gdb_exit
+gdb_start
+
+# Skip all tests if Guile scripting is not enabled.
+if { [skip_guile_tests] } { continue }
+
+gdb_reinitialize_dir $srcdir/$subdir
+gdb_test_no_output "set auto-load safe-path ${remote_guile_file}" \
+    "set auto-load safe-path"
+gdb_load ${binfile}
+
+# Verify gdb loaded the script.
+gdb_test "info auto-load guile-scripts" "Yes.*${testfile}.scm.*"
+# Again, with a regexp this time.
+gdb_test "info auto-load guile-scripts ${testfile}" "Yes.*${testfile}.scm.*"
+# Again, with a regexp that matches no scripts.
+gdb_test "info auto-load guile-scripts no-script-matches-this" \
+  "No auto-load scripts matching no-script-matches-this."
+
+if ![gdb_guile_runto_main] {
+    return
+}
+
+gdb_test "b [gdb_get_line_number {break to inspect} ${testfile}.c ]" \
+    ".*Breakpoint.*"
+gdb_test "continue" ".*Breakpoint.*"
+
+gdb_test "print ss" " = a=<1> b=<2>"
diff --git a/gdb/testsuite/gdb.guile/scm-section-script.scm b/gdb/testsuite/gdb.guile/scm-section-script.scm
new file mode 100644
index 0000000..cd31db9
--- /dev/null
+++ b/gdb/testsuite/gdb.guile/scm-section-script.scm
@@ -0,0 +1,55 @@
+;; Copyright (C) 2010-2014 Free Software Foundation, Inc.
+;;
+;; This program is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3 of the License, or
+;; (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;; This file is part of the GDB testsuite.
+
+(use-modules (gdb) (gdb printing))
+
+(define (make-pp_ss-printer val)
+  (make-pretty-printer-worker
+   #f
+   (lambda (printer)
+     (let ((a (value-field val "a"))
+	   (b (value-field val "b")))
+       (format #f "a=<~A> b=<~A>" a b)))
+   #f))
+
+(define (get-type-for-printing val)
+  "Return type of val, stripping away typedefs, etc."
+  (let ((type (value-type val)))
+    (if (= (type-code type) TYPE_CODE_REF)
+	(set! type (type-target type)))
+    (type-strip-typedefs (type-unqualified type))))
+
+(define (make-pretty-printer-dict)
+  (let ((dict (make-hash-table)))
+    (hash-set! dict "struct ss" make-pp_ss-printer)
+    (hash-set! dict "ss" make-pp_ss-printer)
+    dict))
+
+(define *pretty-printer*
+ (make-pretty-printer
+  "pretty-printer-test"
+  (let ((pretty-printers-dict (make-pretty-printer-dict)))
+    (lambda (matcher val)
+      "Look-up and return a pretty-printer that can print val."
+      (let ((type (get-type-for-printing val)))
+	(let ((typename (type-tag type)))
+	  (if typename
+	      (let ((printer-maker (hash-ref pretty-printers-dict typename)))
+		(and printer-maker (printer-maker val)))
+	      #f)))))))
+
+(append-pretty-printer! #f *pretty-printer*)