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tools/nolibc: tests: add test for -fstack-protector

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Test the previously introduce stack protector functionality in nolibc.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Thomas Weißschuh 2023-03-25 16:45:14 +01:00 committed by Paul E. McKenney
parent 255ffeee71
commit 9735716830
2 changed files with 63 additions and 2 deletions
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3
tools/testing/selftests/nolibc/Makefile
View File

@ -76,6 +76,9 @@ else
Q=@
endif
CFLAGS_STACKPROTECTOR = -DNOLIBC_STACKPROTECTOR \
$(call cc-option,-mstack-protector-guard=global) \
$(call cc-option,-fstack-protector-all)
CFLAGS_s390 = -m64
CFLAGS ?= -Os -fno-ident -fno-asynchronous-unwind-tables \
$(call cc-option,-fno-stack-protector) \

62
tools/testing/selftests/nolibc/nolibc-test.c
View File

@ -667,6 +667,63 @@ int run_stdlib(int min, int max)
return ret;
}
#if defined(__clang__)
__attribute__((optnone))
#elif defined(__GNUC__)
__attribute__((optimize("O0")))
#endif
static int smash_stack(void)
{
char buf[100];
for (size_t i = 0; i < 200; i++)
buf[i] = 'P';
return 1;
}
static int run_protection(int min, int max)
{
pid_t pid;
int llen = 0, status;
llen += printf("0 -fstackprotector ");
#if !defined(NOLIBC_STACKPROTECTOR)
llen += printf("not supported");
pad_spc(llen, 64, "[SKIPPED]\n");
return 0;
#endif
pid = -1;
pid = fork();
switch (pid) {
case -1:
llen += printf("fork()");
pad_spc(llen, 64, "[FAIL]\n");
return 1;
case 0:
close(STDOUT_FILENO);
close(STDERR_FILENO);
smash_stack();
return 1;
default:
pid = waitpid(pid, &status, 0);
if (pid == -1 || !WIFSIGNALED(status) || WTERMSIG(status) != SIGABRT) {
llen += printf("waitpid()");
pad_spc(llen, 64, "[FAIL]\n");
return 1;
}
pad_spc(llen, 64, " [OK]\n");
return 0;
}
}
/* prepare what needs to be prepared for pid 1 (stdio, /dev, /proc, etc) */
int prepare(void)
{
@ -719,8 +776,9 @@ int prepare(void)
/* This is the definition of known test names, with their functions */
static const struct test test_names[] = {
/* add new tests here */
{ .name = "syscall", .func = run_syscall },
{ .name = "stdlib", .func = run_stdlib },
{ .name = "syscall", .func = run_syscall },
{ .name = "stdlib", .func = run_stdlib },
{ .name = "protection", .func = run_protection },
{ 0 }
};