tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/powerpc/tm/tm-signal-context-chk-fpu.c
Extension
.c
Size
3197 bytes
Lines
112
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (fail) {
			broken = 1;
			printf("FPR%d (1st context) == %g instead of %g (expected)\n",
				FPR14 + i, ucp->uc_mcontext.fp_regs[FPR14 + i], fps[i]);
		}
	}

	for (i = 0; i < NV_FPU_REGS; i++) {
		/* Check second context. Print all mismatches. */
		fail = (tm_ucp->uc_mcontext.fp_regs[FPR14 + i] != fps[NV_FPU_REGS + i]);
		if (fail) {
			broken = 1;
			printf("FPR%d (2nd context) == %g instead of %g (expected)\n",
				FPR14 + i, tm_ucp->uc_mcontext.fp_regs[FPR14 + i], fps[NV_FPU_REGS + i]);
		}
	}
}

static int tm_signal_context_chk_fpu()
{
	struct sigaction act;
	int i;
	long rc;
	pid_t pid = getpid();

	SKIP_IF(!have_htm());
	SKIP_IF(htm_is_synthetic());

	act.sa_sigaction = signal_usr1;
	sigemptyset(&act.sa_mask);
	act.sa_flags = SA_SIGINFO;
	if (sigaction(SIGUSR1, &act, NULL) < 0) {
		perror("sigaction sigusr1");
		exit(1);
	}

	i = 0;
	while (i < MAX_ATTEMPT && !broken) {
		/*
		 * tm_signal_self_context_load will set both first and second
		 * contexts accordingly to the values passed through non-NULL
		 * array pointers to it, in that case 'fps', and invoke the
		 * signal handler installed for SIGUSR1.
		 */
		rc = tm_signal_self_context_load(pid, NULL, fps, NULL, NULL);
		FAIL_IF(rc != pid);
		i++;
	}

	return (broken);
}

int main(void)
{
	return test_harness(tm_signal_context_chk_fpu, "tm_signal_context_chk_fpu");
}

Annotation

Implementation Notes