2 * Copyright 2015, Sam Bobroff, IBM Corp.
3 * Licensed under GPLv2.
5 * Test the kernel's system call code to ensure that a system call
6 * made from within an active HTM transaction is aborted with the
7 * correct failure code.
8 * Conversely, ensure that a system call made from within a
9 * suspended transaction can succeed.
14 #include <sys/syscall.h>
22 extern int getppid_tm_active(void);
23 extern int getppid_tm_suspended(void);
27 #define TEST_DURATION 10 /* seconds */
28 #define TM_RETRIES 100
30 long failure_code(void)
32 return __builtin_get_texasru() >> 24;
35 bool failure_is_persistent(void)
37 return (failure_code() & TM_CAUSE_PERSISTENT) == TM_CAUSE_PERSISTENT;
40 bool failure_is_syscall(void)
42 return (failure_code() & TM_CAUSE_SYSCALL) == TM_CAUSE_SYSCALL;
45 pid_t getppid_tm(bool suspend)
50 for (i = 0; i < TM_RETRIES; i++) {
52 pid = getppid_tm_suspended();
54 pid = getppid_tm_active();
59 if (failure_is_persistent()) {
60 if (failure_is_syscall())
63 printf("Unexpected persistent transaction failure.\n");
64 printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
65 __builtin_get_texasr(), __builtin_get_tfiar());
72 printf("Exceeded limit of %d temporary transaction failures.\n", TM_RETRIES);
73 printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n",
74 __builtin_get_texasr(), __builtin_get_tfiar());
82 struct timeval end, now;
84 SKIP_IF(!have_htm_nosc());
88 printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION);
90 gettimeofday(&end, NULL);
91 now.tv_sec = TEST_DURATION;
93 timeradd(&end, &now, &end);
95 for (count = 0; timercmp(&now, &end, <); count++) {
97 * Test a syscall within a suspended transaction and verify
100 FAIL_IF(getppid_tm(true) == -1); /* Should succeed. */
103 * Test a syscall within an active transaction and verify that
104 * it fails with the correct failure code.
106 FAIL_IF(getppid_tm(false) != -1); /* Should fail... */
107 FAIL_IF(!failure_is_persistent()); /* ...persistently... */
108 FAIL_IF(!failure_is_syscall()); /* ...with code syscall. */
109 gettimeofday(&now, 0);
112 printf("%d active and suspended transactions behaved correctly.\n", count);
113 printf("(There were %d transaction retries.)\n", retries);
120 return test_harness(tm_syscall, "tm_syscall");