351 lines
11 KiB
Diff
351 lines
11 KiB
Diff
From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Fedora GDB patches <invalid@email.com>
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Date: Fri, 27 Oct 2017 21:07:50 +0200
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Subject: gdb-rhbz1156192-recursive-dlopen-test.patch
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;; Testcase for '[SAP] Recursive dlopen causes SAP HANA installer to
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;; crash.' (RH BZ 1156192).
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;;=fedoratest
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diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libbar.c b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libbar.c
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libbar.c
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@@ -0,0 +1,30 @@
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+/* Testcase for recursive dlopen calls.
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+
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+ Copyright (C) 2014 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
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+
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+/* This test was copied from glibc's testcase called
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+ <dlfcn/tst-rec-dlopen.c> and related files. */
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+
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+#include <stdio.h>
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+#include <stdlib.h>
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+
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+void
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+bar (void)
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+{
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+ printf ("Called bar.\n");
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+}
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diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libfoo.c b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libfoo.c
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libfoo.c
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@@ -0,0 +1,30 @@
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+/* Testcase for recursive dlopen calls.
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+
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+ Copyright (C) 2014 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
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+
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+/* This test was copied from glibc's testcase called
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+ <dlfcn/tst-rec-dlopen.c> and related files. */
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+
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+#include <stdio.h>
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+#include <stdlib.h>
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+
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+void
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+foo (void)
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+{
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+ printf ("Called foo.\n");
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+}
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diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.c b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.c
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.c
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@@ -0,0 +1,124 @@
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+/* Testcase for recursive dlopen calls.
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+
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+ Copyright (C) 2014 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
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+
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+/* This test was copied from glibc's testcase called
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+ <dlfcn/tst-rec-dlopen.c> and related files. */
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+
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <malloc.h>
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+#include <dlfcn.h>
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+
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+#define DSO "gdb-rhbz1156192-recursive-dlopen-libfoo.so"
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+#define FUNC "foo"
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+
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+#define DSO1 "gdb-rhbz1156192-recursive-dlopen-libbar.so"
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+#define FUNC1 "bar"
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+
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+/* Prototype for my hook. */
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+void *custom_malloc_hook (size_t, const void *);
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+
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+/* Pointer to old malloc hooks. */
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+void *(*old_malloc_hook) (size_t, const void *);
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+
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+/* Call function func_name in DSO dso_name via dlopen. */
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+void
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+call_func (const char *dso_name, const char *func_name)
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+{
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+ int ret;
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+ void *dso;
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+ void (*func) (void);
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+ char *err;
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+
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+ /* Open the DSO. */
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+ dso = dlopen (dso_name, RTLD_NOW|RTLD_GLOBAL);
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+ if (dso == NULL)
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+ {
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+ err = dlerror ();
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+ fprintf (stderr, "%s\n", err);
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+ exit (1);
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+ }
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+ /* Clear any errors. */
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+ dlerror ();
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+
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+ /* Lookup func. */
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+ *(void **) (&func) = dlsym (dso, func_name);
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+ if (func == NULL)
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+ {
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+ err = dlerror ();
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+ if (err != NULL)
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+ {
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+ fprintf (stderr, "%s\n", err);
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+ exit (1);
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+ }
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+ }
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+ /* Call func twice. */
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+ (*func) ();
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+
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+ /* Close the library and look for errors too. */
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+ ret = dlclose (dso);
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+ if (ret != 0)
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+ {
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+ err = dlerror ();
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+ fprintf (stderr, "%s\n", err);
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+ exit (1);
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+ }
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+
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+}
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+
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+/* Empty hook that does nothing. */
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+void *
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+custom_malloc_hook (size_t size, const void *caller)
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+{
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+ void *result;
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+ /* Restore old hooks. */
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+ __malloc_hook = old_malloc_hook;
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+ /* First call a function in another library via dlopen. */
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+ call_func (DSO1, FUNC1);
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+ /* Called recursively. */
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+ result = malloc (size);
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+ /* Restore new hooks. */
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+ __malloc_hook = custom_malloc_hook;
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+ return result;
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+}
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+
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+int
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+main (void)
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+{
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+
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+ /* Save old hook. */
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+ old_malloc_hook = __malloc_hook;
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+ /* Install new hook. */
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+ __malloc_hook = custom_malloc_hook;
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+
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+ /* Attempt to dlopen a shared library. This dlopen will
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+ trigger an access to the ld.so.cache, and that in turn
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+ will require a malloc to duplicate data in the cache.
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+ The malloc will call our malloc hook which calls dlopen
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+ recursively, and upon return of this dlopen the non-ref
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+ counted ld.so.cache mapping will be unmapped. We will
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+ return to the original dlopen and crash trying to access
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+ dlopened data. */
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+ call_func (DSO, FUNC);
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+
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+ /* Restore old hook. */
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+ __malloc_hook = old_malloc_hook;
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+
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+ return 0;
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+}
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diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.exp b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.exp
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new file mode 100644
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--- /dev/null
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+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.exp
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@@ -0,0 +1,137 @@
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+# Copyright 2014 Free Software Foundation, Inc.
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+#
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+# This program is free software; you can redistribute it and/or modify
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+# it under the terms of the GNU General Public License as published by
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+# the Free Software Foundation; either version 3 of the License, or
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+# (at your option) any later version.
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+#
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+# This program is distributed in the hope that it will be useful,
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+# but WITHOUT ANY WARRANTY; without even the implied warranty of
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+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+# GNU General Public License for more details.
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+#
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+# You should have received a copy of the GNU General Public License
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+# along with this program. If not, see <http://www.gnu.org/licenses/>.
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+
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+if { [skip_shlib_tests] } {
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+ return 0
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+}
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+
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+# Library foo
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+set libname1 "gdb-rhbz1156192-recursive-dlopen-libfoo"
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+set srcfile_lib1 ${srcdir}/${subdir}/${libname1}.c
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+set binfile_lib1 [standard_output_file ${libname1}.so]
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+# Library bar
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+set libname2 "gdb-rhbz1156192-recursive-dlopen-libbar"
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+set srcfile_lib2 ${srcdir}/${subdir}/${libname2}.c
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+set binfile_lib2 [standard_output_file ${libname2}.so]
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+
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+set testfile "gdb-rhbz1156192-recursive-dlopen"
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+set srcfile ${testfile}.c
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+set executable ${testfile}
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+set binfile [standard_output_file ${executable}]
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+
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+if { [gdb_compile_shlib ${srcfile_lib1} ${binfile_lib1} \
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+ { debug "additional_flags=-fPIC" }] != "" } {
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+ untested "Could not compile ${binfile_lib1}"
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+ return -1
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+}
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+
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+if { [gdb_compile_shlib ${srcfile_lib2} ${binfile_lib2} \
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+ { debug "additional_flags=-fPIC" }] != "" } {
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+ untested "Could not compile ${binfile_lib2}"
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+ return -1
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+}
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+
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+if { [prepare_for_testing ${testfile}.exp ${executable} ${srcfile} \
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+ [ list debug shlib_load "additional_flags=-Wno-deprecated-declarations" ]] } {
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+ untested "Could not compile ${executable}"
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+ return -1
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+}
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+
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+proc do_test { has_libfoo has_libbar } {
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+ global hex binfile_lib2 binfile_lib1 gdb_prompt
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+ set libbar_match "[string_to_regexp $binfile_lib2]"
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+ set libfoo_match "[string_to_regexp $binfile_lib1]"
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+
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+ gdb_test_multiple "info shared" "info shared" {
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+ -re ".*$libfoo_match\r\n.*$libbar_match\(\r\n.*Shared library is missing\)?.*\r\n${gdb_prompt} $" {
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+ if { $has_libfoo && $has_libbar } {
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+ pass "matched libfoo and libbar"
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+ } else {
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+ fail "matched libfoo and libbar (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"
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+ }
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+ }
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+ -re ".*$libfoo_match\(\r\n.*Shared library is missing\)?.*\r\n${gdb_prompt} $" {
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+ if { $has_libfoo && !$has_libbar } {
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+ pass "matched libfoo"
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+ } else {
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+ fail "matched libfoo (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"
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+ }
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+ }
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+ -re ".*$libbar_match\(\r\n.*Shared library is missing\)?.*\r\n${gdb_prompt} $" {
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+ if { $has_libbar && !$has_libfoo } {
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+ pass "matched libbar"
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+ } else {
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+ fail "matched libbar (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"
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+ }
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+ }
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+ "\r\n${gdb_prompt} $" {
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+ if { !$has_libfoo && !$has_libbar } {
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+ pass "did not match libfoo nor libbar"
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+ } else {
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+ fail "did not match libfoo nor libbar (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"
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+ }
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+ }
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+ }
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+}
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+
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+proc test_stop_on_solib_events { } {
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+ set pass 0
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+ # This variable holds the information about whether libfoo and
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+ # libbar (respectively) are expected in the "info shared" output.
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+ set solib_event_order { { 0 0 } { 0 0 } { 0 0 } { 0 1 } \
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+ { 0 1 } { 0 0 } { 0 0 } { 0 1 } \
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+ { 0 1 } { 0 0 } { 0 0 } { 0 1 } \
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+ { 0 1 } { 0 0 } { 0 0 1 } { 1 1 } \
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+ { 1 1 } { 1 0 } { 1 0 } { 1 1 } \
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+ { 1 1 } { 1 0 1 } { 1 0 } { 1 0 } }
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+
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+ with_test_prefix "stop-on-solib-events" {
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+ gdb_test_no_output "set stop-on-solib-events 1" "setting stop-on-solib-events"
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+
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+ gdb_run_cmd
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+ foreach l $solib_event_order {
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+ incr pass
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+ with_test_prefix "pass #$pass" {
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+ set should_be_corrupted [expr 0+0[lindex $l 2]]
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+ do_test [lindex $l 0] [lindex $l 1]
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+ set test "continue"
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+ global gdb_prompt
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+ gdb_test_multiple $test $test {
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+ -re "\r\nwarning: Corrupted shared library list:.*\r\nStopped due to shared library event.*\r\n$gdb_prompt $" {
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+ set corrupted 1
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+ pass $test
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+ }
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+ -re "\r\nStopped due to shared library event.*\r\n$gdb_prompt $" {
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+ set corrupted 0
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+ pass $test
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+ }
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+ }
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+ set test "corrupted=$corrupted but should_be_corrupted=$should_be_corrupted"
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+ if {$corrupted == $should_be_corrupted} {
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+ pass $test
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+ } else {
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+ fail $test
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+ }
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+ }
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+ }
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+ # In the last pass we do not expect to see libfoo or libbar.
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+ incr pass
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+ with_test_prefix "pass #$pass" {
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+ do_test 0 0
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+ }
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+ }
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+}
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+
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+test_stop_on_solib_events
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