From: Richard Henderson <richard.hender...@linaro.org> Signed-off-by: Richard Henderson <richard.hender...@linaro.org> (cherry picked from commit e13e1195db8af18e149065a59351ea85215645bb) Signed-off-by: Michael Tokarev <m...@tls.msk.ru>
diff --git a/tests/tcg/multiarch/Makefile.target b/tests/tcg/multiarch/Makefile.target index 45c9cfe18c..cfecf65c2d 100644 --- a/tests/tcg/multiarch/Makefile.target +++ b/tests/tcg/multiarch/Makefile.target @@ -45,6 +45,8 @@ vma-pthread: LDFLAGS+=-pthread sigreturn-sigmask: CFLAGS+=-pthread sigreturn-sigmask: LDFLAGS+=-pthread +tb-link: LDFLAGS+=-lpthread + # GCC versions 12/13/14/15 at least incorrectly complain about # "'SHA1Transform' reading 64 bytes from a region of size 0"; see the gcc bug # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106709 diff --git a/tests/tcg/multiarch/tb-link.c b/tests/tcg/multiarch/tb-link.c new file mode 100644 index 0000000000..4e40306fa1 --- /dev/null +++ b/tests/tcg/multiarch/tb-link.c @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Verify that a single TB spin-loop is properly invalidated, + * releasing the thread from the spin-loop. + */ + +#include <assert.h> +#include <sys/mman.h> +#include <pthread.h> +#include <stdint.h> +#include <stdbool.h> +#include <unistd.h> +#include <sched.h> + + +#ifdef __x86_64__ +#define READY 0x000047c6 /* movb $0,0(%rdi) */ +#define LOOP 0xfceb9090 /* 1: nop*2; jmp 1b */ +#define RETURN 0x909090c3 /* ret; nop*3 */ +#define NOP 0x90909090 /* nop*4 */ +#elif defined(__aarch64__) +#define READY 0x3900001f /* strb wzr,[x0] */ +#define LOOP 0x14000000 /* b . */ +#define RETURN 0xd65f03c0 /* ret */ +#define NOP 0xd503201f /* nop */ +#elif defined(__riscv) +#define READY 0x00050023 /* sb zero, (a0) */ +#define LOOP 0x0000006f /* jal zero, #0 */ +#define RETURN 0x00008067 /* jalr zero, ra, 0 */ +#define NOP 0x00000013 /* nop */ +#endif + + +int main() +{ +#ifdef READY + int tmp; + pthread_t thread_id; + bool hold = true; + uint32_t *buf; + + buf = mmap(NULL, 3 * sizeof(uint32_t), + PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + assert(buf != MAP_FAILED); + + buf[0] = READY; + buf[1] = LOOP; + buf[2] = RETURN; + + alarm(2); + + tmp = pthread_create(&thread_id, NULL, (void *(*)(void *))buf, &hold); + assert(tmp == 0); + + while (hold) { + sched_yield(); + } + + buf[1] = NOP; + __builtin___clear_cache(&buf[1], &buf[2]); + + tmp = pthread_join(thread_id, NULL); + assert(tmp == 0); +#endif + return 0; +} -- 2.47.3
