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selftests/nolibc: add tests for multi-object linkage

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While uncommon, nolibc executables can be linked together from multiple
compilation units.
Add some tests to make sure everything works in that case.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/lkml/20231012-nolibc-linkage-test-v1-1-315e682768b4@weissschuh.net/
Acked-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Thomas Weißschuh 2023-10-12 00:42:04 +02:00
parent 17362f3d0b
commit b8c60e8fc6
4 changed files with 45 additions and 6 deletions
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12
tools/testing/selftests/nolibc/Makefile
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@ -171,17 +171,17 @@ sysroot/$(ARCH)/include:
$(Q)mv sysroot/sysroot sysroot/$(ARCH)
ifneq ($(NOLIBC_SYSROOT),0)
nolibc-test: nolibc-test.c sysroot/$(ARCH)/include
nolibc-test: nolibc-test.c nolibc-test-linkage.c sysroot/$(ARCH)/include
$(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \
-nostdlib -nostdinc -static -Isysroot/$(ARCH)/include $< -lgcc
-nostdlib -nostdinc -static -Isysroot/$(ARCH)/include nolibc-test.c nolibc-test-linkage.c -lgcc
else
nolibc-test: nolibc-test.c
nolibc-test: nolibc-test.c nolibc-test-linkage.c
$(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \
-nostdlib -static -include ../../../include/nolibc/nolibc.h $< -lgcc
-nostdlib -static -include ../../../include/nolibc/nolibc.h nolibc-test.c nolibc-test-linkage.c -lgcc
endif
libc-test: nolibc-test.c
$(QUIET_CC)$(HOSTCC) -o $@ $<
libc-test: nolibc-test.c nolibc-test-linkage.c
$(QUIET_CC)$(HOSTCC) -o $@ nolibc-test.c nolibc-test-linkage.c
# local libc-test
run-libc-test: libc-test

26
tools/testing/selftests/nolibc/nolibc-test-linkage.c Normal file
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@ -0,0 +1,26 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include "nolibc-test-linkage.h"
#ifndef NOLIBC
#include <errno.h>
#endif
void *linkage_test_errno_addr(void)
{
return &errno;
}
int linkage_test_constructor_test_value;
__attribute__((constructor))
static void constructor1(void)
{
linkage_test_constructor_test_value = 2;
}
__attribute__((constructor))
static void constructor2(void)
{
linkage_test_constructor_test_value *= 3;
}

9
tools/testing/selftests/nolibc/nolibc-test-linkage.h Normal file
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@ -0,0 +1,9 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NOLIBC_TEST_LINKAGE_H
#define _NOLIBC_TEST_LINKAGE_H
void *linkage_test_errno_addr(void);
extern int linkage_test_constructor_test_value;
#endif /* _NOLIBC_TEST_LINKAGE_H */

4
tools/testing/selftests/nolibc/nolibc-test.c
View File

@ -41,6 +41,8 @@
#endif
#endif
#include "nolibc-test-linkage.h"
/* for the type of int_fast16_t and int_fast32_t, musl differs from glibc and nolibc */
#define SINT_MAX_OF_TYPE(type) (((type)1 << (sizeof(type) * 8 - 2)) - (type)1 + ((type)1 << (sizeof(type) * 8 - 2)))
#define SINT_MIN_OF_TYPE(type) (-SINT_MAX_OF_TYPE(type) - 1)
@ -647,6 +649,8 @@ int run_startup(int min, int max)
CASE_TEST(auxv_addr); EXPECT_PTRGT(test_auxv != (void *)-1, test_auxv, brk); break;
CASE_TEST(auxv_AT_UID); EXPECT_EQ(1, getauxval(AT_UID), getuid()); break;
CASE_TEST(constructor); EXPECT_EQ(1, constructor_test_value, 2); break;
CASE_TEST(linkage_errno); EXPECT_PTREQ(1, linkage_test_errno_addr(), &errno); break;
CASE_TEST(linkage_constr); EXPECT_EQ(1, linkage_test_constructor_test_value, 6); break;
case __LINE__:
return ret; /* must be last */
/* note: do not set any defaults so as to permit holes above */