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/* Self tests for gdb_environ for GDB, the GNU debugger.
Copyright (C) 2017-2021 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/>. */
#include "defs.h"
#include "gdbsupport/selftest.h"
#include "gdbsupport/environ.h"
#include "diagnostics.h"
static const char gdb_selftest_env_var[] = "GDB_SELFTEST_ENVIRON";
static bool
set_contains (const std::set<std::string> &set, std::string key)
{
return set.find (key) != set.end ();
}
namespace selftests {
namespace gdb_environ_tests {
/* Test if the vector is initialized in a correct way. */
static void
test_vector_initialization ()
{
gdb_environ env;
/* When the vector is initialized, there should always be one NULL
element in it. */
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (env.user_unset_env ().size () == 0);
/* Make sure that there is no other element. */
SELF_CHECK (env.get ("PWD") == NULL);
}
/* Test initialization using the host's environ. */
static void
test_init_from_host_environ ()
{
/* Initialize the environment vector using the host's environ. */
gdb_environ env = gdb_environ::from_host_environ ();
/* The user-set and user-unset lists must be empty. */
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (env.user_unset_env ().size () == 0);
/* Our test environment variable should be present at the
vector. */
SELF_CHECK (strcmp (env.get (gdb_selftest_env_var), "1") == 0);
}
/* Test reinitialization using the host's environ. */
static void
test_reinit_from_host_environ ()
{
/* Reinitialize our environ vector using the host environ. We
should be able to see one (and only one) instance of the test
variable. */
gdb_environ env = gdb_environ::from_host_environ ();
env = gdb_environ::from_host_environ ();
char **envp = env.envp ();
int num_found = 0;
for (size_t i = 0; envp[i] != NULL; ++i)
if (strcmp (envp[i], "GDB_SELFTEST_ENVIRON=1") == 0)
++num_found;
SELF_CHECK (num_found == 1);
}
/* Test the case when we set a variable A, then set a variable B,
then unset A, and make sure that we cannot find A in the environ
vector, but can still find B. */
static void
test_set_A_unset_B_unset_A_cannot_find_A_can_find_B ()
{
gdb_environ env;
env.set ("GDB_SELFTEST_ENVIRON_1", "aaa");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON_1"), "aaa") == 0);
/* User-set environ var list must contain one element. */
SELF_CHECK (env.user_set_env ().size () == 1);
SELF_CHECK (set_contains (env.user_set_env (),
std::string ("GDB_SELFTEST_ENVIRON_1=aaa")));
env.set ("GDB_SELFTEST_ENVIRON_2", "bbb");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON_2"), "bbb") == 0);
env.unset ("GDB_SELFTEST_ENVIRON_1");
SELF_CHECK (env.get ("GDB_SELFTEST_ENVIRON_1") == NULL);
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON_2"), "bbb") == 0);
/* The user-set environ var list must contain only one element
now. */
SELF_CHECK (set_contains (env.user_set_env (),
std::string ("GDB_SELFTEST_ENVIRON_2=bbb")));
SELF_CHECK (env.user_set_env ().size () == 1);
}
/* Check if unset followed by a set in an empty vector works. */
static void
test_unset_set_empty_vector ()
{
gdb_environ env;
env.set ("PWD", "test");
SELF_CHECK (strcmp (env.get ("PWD"), "test") == 0);
SELF_CHECK (set_contains (env.user_set_env (), std::string ("PWD=test")));
SELF_CHECK (env.user_unset_env ().size () == 0);
/* The second element must be NULL. */
SELF_CHECK (env.envp ()[1] == NULL);
SELF_CHECK (env.user_set_env ().size () == 1);
env.unset ("PWD");
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (env.user_unset_env ().size () == 1);
SELF_CHECK (set_contains (env.user_unset_env (), std::string ("PWD")));
}
/* When we clear our environ vector, there should be only one
element on it (NULL), and we shouldn't be able to get our test
variable. */
static void
test_vector_clear ()
{
gdb_environ env;
env.set (gdb_selftest_env_var, "1");
env.clear ();
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (env.user_unset_env ().size () == 0);
SELF_CHECK (env.get (gdb_selftest_env_var) == NULL);
}
/* Test that after a std::move the moved-from object is left at a
valid state (i.e., its only element is NULL). */
static void
test_std_move ()
{
gdb_environ env;
gdb_environ env2;
env.set ("A", "1");
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
SELF_CHECK (set_contains (env.user_set_env (), std::string ("A=1")));
SELF_CHECK (env.user_set_env ().size () == 1);
env2 = std::move (env);
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (strcmp (env2.get ("A"), "1") == 0);
SELF_CHECK (env2.envp ()[1] == NULL);
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (set_contains (env2.user_set_env (), std::string ("A=1")));
SELF_CHECK (env2.user_set_env ().size () == 1);
env.set ("B", "2");
SELF_CHECK (strcmp (env.get ("B"), "2") == 0);
SELF_CHECK (env.envp ()[1] == NULL);
}
/* Test that the move constructor leaves everything at a valid
state. */
static void
test_move_constructor ()
{
gdb_environ env;
env.set ("A", "1");
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
SELF_CHECK (set_contains (env.user_set_env (), std::string ("A=1")));
gdb_environ env2 = std::move (env);
SELF_CHECK (env.envp ()[0] == NULL);
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (strcmp (env2.get ("A"), "1") == 0);
SELF_CHECK (env2.envp ()[1] == NULL);
SELF_CHECK (set_contains (env2.user_set_env (), std::string ("A=1")));
SELF_CHECK (env2.user_set_env ().size () == 1);
env.set ("B", "2");
SELF_CHECK (strcmp (env.get ("B"), "2") == 0);
SELF_CHECK (env.envp ()[1] == NULL);
SELF_CHECK (set_contains (env.user_set_env (), std::string ("B=2")));
SELF_CHECK (env.user_set_env ().size () == 1);
}
/* Test that self-moving works. */
static void
test_self_move ()
{
gdb_environ env;
/* Test self-move. */
env.set ("A", "1");
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
SELF_CHECK (set_contains (env.user_set_env (), std::string ("A=1")));
SELF_CHECK (env.user_set_env ().size () == 1);
/* Some compilers warn about moving to self, but that's precisely what we want
to test here, so turn this warning off. */
DIAGNOSTIC_PUSH
DIAGNOSTIC_IGNORE_SELF_MOVE
env = std::move (env);
DIAGNOSTIC_POP
SELF_CHECK (strcmp (env.get ("A"), "1") == 0);
SELF_CHECK (strcmp (env.envp ()[0], "A=1") == 0);
SELF_CHECK (env.envp ()[1] == NULL);
SELF_CHECK (set_contains (env.user_set_env (), std::string ("A=1")));
SELF_CHECK (env.user_set_env ().size () == 1);
}
/* Test if set/unset/reset works. */
static void
test_set_unset_reset ()
{
gdb_environ env = gdb_environ::from_host_environ ();
/* Our test variable should already be present in the host's environment. */
SELF_CHECK (env.get ("GDB_SELFTEST_ENVIRON") != NULL);
/* Set our test variable to another value. */
env.set ("GDB_SELFTEST_ENVIRON", "test");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON"), "test") == 0);
SELF_CHECK (env.user_set_env ().size () == 1);
SELF_CHECK (env.user_unset_env ().size () == 0);
/* And unset our test variable. The variable still exists in the
host's environment, but doesn't exist in our vector. */
env.unset ("GDB_SELFTEST_ENVIRON");
SELF_CHECK (env.get ("GDB_SELFTEST_ENVIRON") == NULL);
SELF_CHECK (env.user_set_env ().size () == 0);
SELF_CHECK (env.user_unset_env ().size () == 1);
SELF_CHECK (set_contains (env.user_unset_env (),
std::string ("GDB_SELFTEST_ENVIRON")));
/* Re-set the test variable. */
env.set ("GDB_SELFTEST_ENVIRON", "1");
SELF_CHECK (strcmp (env.get ("GDB_SELFTEST_ENVIRON"), "1") == 0);
}
static void
run_tests ()
{
/* Set a test environment variable. */
if (setenv ("GDB_SELFTEST_ENVIRON", "1", 1) != 0)
error (_("Could not set environment variable for testing."));
test_vector_initialization ();
test_unset_set_empty_vector ();
test_init_from_host_environ ();
test_set_unset_reset ();
test_vector_clear ();
test_reinit_from_host_environ ();
/* Get rid of our test variable. We won't need it anymore. */
unsetenv ("GDB_SELFTEST_ENVIRON");
test_set_A_unset_B_unset_A_cannot_find_A_can_find_B ();
test_std_move ();
test_move_constructor ();
test_self_move ();
}
} /* namespace gdb_environ */
} /* namespace selftests */
void _initialize_environ_selftests ();
void
_initialize_environ_selftests ()
{
selftests::register_test ("gdb_environ",
selftests::gdb_environ_tests::run_tests);
}
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