From FEDORA_PATCHES Mon Sep 17 00:00:00 2001

From: Fedora GDB patches <invalid@email.com>

Date: Fri, 27 Oct 2017 21:07:50 +0200

Subject: gdb-rhbz1156192-recursive-dlopen-test.patch

;; Testcase for '[SAP] Recursive dlopen causes SAP HANA installer to

;; crash.' (RH BZ 1156192).

;;=fedoratest

diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libbar.c b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libbar.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libbar.c

@@ -0,0 +1,30 @@

+/* Testcase for recursive dlopen calls.

+

+   Copyright (C) 2014 Free Software Foundation, Inc.

+

+   This file is part of GDB.

+

+   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 test was copied from glibc's testcase called

+   <dlfcn/tst-rec-dlopen.c> and related files.  */

+

+#include <stdio.h>

+#include <stdlib.h>

+

+void

+bar (void)

+{

+  printf ("Called bar.\n");

+}

diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libfoo.c b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libfoo.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen-libfoo.c

@@ -0,0 +1,30 @@

+/* Testcase for recursive dlopen calls.

+

+   Copyright (C) 2014 Free Software Foundation, Inc.

+

+   This file is part of GDB.

+

+   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 test was copied from glibc's testcase called

+   <dlfcn/tst-rec-dlopen.c> and related files.  */

+

+#include <stdio.h>

+#include <stdlib.h>

+

+void

+foo (void)

+{

+  printf ("Called foo.\n");

+}

diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.c b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.c

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.c

@@ -0,0 +1,124 @@

+/* Testcase for recursive dlopen calls.

+

+   Copyright (C) 2014 Free Software Foundation, Inc.

+

+   This file is part of GDB.

+

+   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 test was copied from glibc's testcase called

+   <dlfcn/tst-rec-dlopen.c> and related files.  */

+

+#include <stdio.h>

+#include <stdlib.h>

+#include <malloc.h>

+#include <dlfcn.h>

+

+#define DSO "gdb-rhbz1156192-recursive-dlopen-libfoo.so"

+#define FUNC "foo"

+

+#define DSO1 "gdb-rhbz1156192-recursive-dlopen-libbar.so"

+#define FUNC1 "bar"

+

+/* Prototype for my hook.  */

+void *custom_malloc_hook (size_t, const void *);

+

+/* Pointer to old malloc hooks.  */

+void *(*old_malloc_hook) (size_t, const void *);

+

+/* Call function func_name in DSO dso_name via dlopen.  */

+void

+call_func (const char *dso_name, const char *func_name)

+{

+  int ret;

+  void *dso;

+  void (*func) (void);

+  char *err;

+

+  /* Open the DSO.  */

+  dso = dlopen (dso_name, RTLD_NOW|RTLD_GLOBAL);

+  if (dso == NULL)

+    {

+      err = dlerror ();

+      fprintf (stderr, "%s\n", err);

+      exit (1);

+    }

+  /* Clear any errors.  */

+  dlerror ();

+

+  /* Lookup func.  */

+  *(void **) (&func) = dlsym (dso, func_name);

+  if (func == NULL)

+    {

+      err = dlerror ();

+      if (err != NULL)

+        {

+  fprintf (stderr, "%s\n", err);

+  exit (1);

+        }

+    }

+  /* Call func twice.  */

+  (*func) ();

+

+  /* Close the library and look for errors too.  */

+  ret = dlclose (dso);

+  if (ret != 0)

+    {

+      err = dlerror ();

+      fprintf (stderr, "%s\n", err);

+      exit (1);

+    }

+

+}

+

+/* Empty hook that does nothing.  */

+void *

+custom_malloc_hook (size_t size, const void *caller)

+{

+  void *result;

+  /* Restore old hooks.  */

+  __malloc_hook = old_malloc_hook;

+  /* First call a function in another library via dlopen.  */

+  call_func (DSO1, FUNC1);

+  /* Called recursively.  */

+  result = malloc (size);

+  /* Restore new hooks.  */

+  __malloc_hook = custom_malloc_hook;

+  return result;

+}

+

+int

+main (void)

+{

+

+  /* Save old hook.  */

+  old_malloc_hook = __malloc_hook;

+  /* Install new hook.  */

+  __malloc_hook = custom_malloc_hook;

+

+  /* Attempt to dlopen a shared library. This dlopen will

+     trigger an access to the ld.so.cache, and that in turn

+     will require a malloc to duplicate data in the cache.

+     The malloc will call our malloc hook which calls dlopen

+     recursively, and upon return of this dlopen the non-ref

+     counted ld.so.cache mapping will be unmapped. We will

+     return to the original dlopen and crash trying to access

+     dlopened data.  */

+  call_func (DSO, FUNC);

+

+  /* Restore old hook.  */

+  __malloc_hook = old_malloc_hook;

+

+  return 0;

+}

diff --git a/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.exp b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.exp

new file mode 100644

--- /dev/null

+++ b/gdb/testsuite/gdb.base/gdb-rhbz1156192-recursive-dlopen.exp

@@ -0,0 +1,137 @@

+# Copyright 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/>.

+

+if { [skip_shlib_tests] } {

+  return 0

+}

+

+# Library foo

+set libname1 "gdb-rhbz1156192-recursive-dlopen-libfoo"

+set srcfile_lib1 ${srcdir}/${subdir}/${libname1}.c

+set binfile_lib1 [standard_output_file ${libname1}.so]

+# Library bar

+set libname2 "gdb-rhbz1156192-recursive-dlopen-libbar"

+set srcfile_lib2 ${srcdir}/${subdir}/${libname2}.c

+set binfile_lib2 [standard_output_file ${libname2}.so]

+

+set testfile "gdb-rhbz1156192-recursive-dlopen"

+set srcfile ${testfile}.c

+set executable ${testfile}

+set binfile [standard_output_file ${executable}]

+

+if { [gdb_compile_shlib ${srcfile_lib1} ${binfile_lib1} \

+	{ debug "additional_flags=-fPIC" }] != "" } {

+    untested "Could not compile ${binfile_lib1}"

+    return -1

+}

+

+if { [gdb_compile_shlib ${srcfile_lib2} ${binfile_lib2} \

+	{ debug "additional_flags=-fPIC" }] != "" } {

+    untested "Could not compile ${binfile_lib2}"

+    return -1

+}

+

+if { [prepare_for_testing ${testfile}.exp ${executable} ${srcfile} \

+	[ list debug shlib_load "additional_flags=-Wno-deprecated-declarations" ]] } {

+    untested "Could not compile ${executable}"

+    return -1

+}

+

+proc do_test { has_libfoo has_libbar } {

+  global hex binfile_lib2 binfile_lib1 gdb_prompt

+  set libbar_match "[string_to_regexp $binfile_lib2]"

+  set libfoo_match "[string_to_regexp $binfile_lib1]"

+

+  gdb_test_multiple "info shared" "info shared" {

+    -re ".*$libfoo_match\r\n.*$libbar_match\(\r\n.*Shared library is missing\)?.*\r\n${gdb_prompt} $" {

+      if { $has_libfoo && $has_libbar } {

+	pass "matched libfoo and libbar"

+      } else {

+	fail "matched libfoo and libbar (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"

+      }

+    }

+    -re ".*$libfoo_match\(\r\n.*Shared library is missing\)?.*\r\n${gdb_prompt} $" {

+      if { $has_libfoo && !$has_libbar } {

+	pass "matched libfoo"

+      } else {

+	fail "matched libfoo (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"

+      }

+    }

+    -re ".*$libbar_match\(\r\n.*Shared library is missing\)?.*\r\n${gdb_prompt} $" {

+      if { $has_libbar && !$has_libfoo } {

+	pass "matched libbar"

+      } else {

+	fail "matched libbar (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"

+      }

+    }

+    "\r\n${gdb_prompt} $" {

+      if { !$has_libfoo && !$has_libbar } {

+	pass "did not match libfoo nor libbar"

+      } else {

+	fail "did not match libfoo nor libbar (has_libfoo = $has_libfoo, has_libbar = $has_libbar)"

+      }

+    }

+  }

+}

+

+proc test_stop_on_solib_events { } {

+  set pass 0

+  # This variable holds the information about whether libfoo and

+  # libbar (respectively) are expected in the "info shared" output.

+  set solib_event_order { { 0 0 } { 0 0   } { 0 0   } { 0 1 } \

+			  { 0 1 } { 0 0   } { 0 0   } { 0 1 } \

+			  { 0 1 } { 0 0   } { 0 0   } { 0 1 } \

+			  { 0 1 } { 0 0   } { 0 0 1 } { 1 1 } \

+			  { 1 1 } { 1 0   } { 1 0   } { 1 1 } \

+			  { 1 1 } { 1 0 1 } { 1 0   } { 1 0 } }

+

+  with_test_prefix "stop-on-solib-events" {

+    gdb_test_no_output "set stop-on-solib-events 1" "setting stop-on-solib-events"

+

+    gdb_run_cmd

+    foreach l $solib_event_order {

+      incr pass

+      with_test_prefix "pass #$pass" {

+	set should_be_corrupted [expr 0+0[lindex $l 2]]

+	do_test [lindex $l 0] [lindex $l 1]

+	set test "continue"

+	global gdb_prompt

+	gdb_test_multiple $test $test {

+	  -re "\r\nwarning: Corrupted shared library list:.*\r\nStopped due to shared library event.*\r\n$gdb_prompt $" {

+	    set corrupted 1

+	    pass $test

+	  }

+	  -re "\r\nStopped due to shared library event.*\r\n$gdb_prompt $" {

+	    set corrupted 0

+	    pass $test

+	  }

+	}

+	set test "corrupted=$corrupted but should_be_corrupted=$should_be_corrupted"

+	if {$corrupted == $should_be_corrupted} {

+	  pass $test

+	} else {

+	  fail $test

+	}

+      }

+    }

+    # In the last pass we do not expect to see libfoo or libbar.

+    incr pass

+    with_test_prefix "pass #$pass" {

+      do_test 0 0

+    }

+  }

+}

+

+test_stop_on_solib_events