2 * Copyright 2016, Cyril Bur, IBM Corp.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
10 * Test the kernel's signal frame code.
12 * The kernel sets up two sets of ucontexts if the signal was to be
13 * delivered while the thread was in a transaction.
14 * Expected behaviour is that the checkpointed state is in the user
15 * context passed to the signal handler. The speculated state can be
16 * accessed with the uc_link pointer.
18 * The rationale for this is that if TM unaware code (which linked
19 * against TM libs) installs a signal handler it will not know of the
20 * speculative nature of the 'live' registers and may infer the wrong
34 #define MAX_ATTEMPT 500000
36 #define NV_FPU_REGS 18
38 long tm_signal_self_context_load(pid_t pid, long *gprs, double *fps, vector int *vms, vector int *vss);
40 /* Be sure there are 2x as many as there are NV FPU regs (2x18) */
41 static double fps[] = {
42 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18,
43 -1,-2,-3,-4,-5,-6,-7,-8,-9,-10,-11,-12,-13,-14,-15,-16,-17,-18
46 static sig_atomic_t fail;
48 static void signal_usr1(int signum, siginfo_t *info, void *uc)
52 ucontext_t *tm_ucp = ucp->uc_link;
54 for (i = 0; i < NV_FPU_REGS && !fail; i++) {
55 fail = (ucp->uc_mcontext.fp_regs[i + 14] != fps[i]);
56 fail |= (tm_ucp->uc_mcontext.fp_regs[i + 14] != fps[i + NV_FPU_REGS]);
58 printf("Failed on %d FP %g or %g\n", i, ucp->uc_mcontext.fp_regs[i + 14], tm_ucp->uc_mcontext.fp_regs[i + 14]);
62 static int tm_signal_context_chk_fpu()
71 act.sa_sigaction = signal_usr1;
72 sigemptyset(&act.sa_mask);
73 act.sa_flags = SA_SIGINFO;
74 if (sigaction(SIGUSR1, &act, NULL) < 0) {
75 perror("sigaction sigusr1");
80 while (i < MAX_ATTEMPT && !fail) {
81 rc = tm_signal_self_context_load(pid, NULL, fps, NULL, NULL);
91 return test_harness(tm_signal_context_chk_fpu, "tm_signal_context_chk_fpu");