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106 lines
2.4 KiB
106 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright 2015, Sam Bobroff, IBM Corp. |
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* |
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* Test the kernel's system call code to ensure that a system call |
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* made from within an active HTM transaction is aborted with the |
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* correct failure code. |
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* Conversely, ensure that a system call made from within a |
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* suspended transaction can succeed. |
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*/ |
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#include <stdio.h> |
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#include <unistd.h> |
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#include <sys/syscall.h> |
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#include <asm/tm.h> |
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#include <sys/time.h> |
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#include <stdlib.h> |
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#include "utils.h" |
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#include "tm.h" |
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extern int getppid_tm_active(void); |
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extern int getppid_tm_suspended(void); |
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unsigned retries = 0; |
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#define TEST_DURATION 10 /* seconds */ |
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#define TM_RETRIES 100 |
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pid_t getppid_tm(bool suspend) |
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{ |
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int i; |
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pid_t pid; |
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for (i = 0; i < TM_RETRIES; i++) { |
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if (suspend) |
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pid = getppid_tm_suspended(); |
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else |
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pid = getppid_tm_active(); |
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if (pid >= 0) |
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return pid; |
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if (failure_is_persistent()) { |
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if (failure_is_syscall()) |
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return -1; |
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printf("Unexpected persistent transaction failure.\n"); |
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printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n", |
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__builtin_get_texasr(), __builtin_get_tfiar()); |
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exit(-1); |
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} |
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retries++; |
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} |
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printf("Exceeded limit of %d temporary transaction failures.\n", TM_RETRIES); |
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printf("TEXASR 0x%016lx, TFIAR 0x%016lx.\n", |
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__builtin_get_texasr(), __builtin_get_tfiar()); |
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exit(-1); |
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} |
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int tm_syscall(void) |
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{ |
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unsigned count = 0; |
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struct timeval end, now; |
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SKIP_IF(!have_htm_nosc()); |
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setbuf(stdout, NULL); |
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printf("Testing transactional syscalls for %d seconds...\n", TEST_DURATION); |
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gettimeofday(&end, NULL); |
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now.tv_sec = TEST_DURATION; |
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now.tv_usec = 0; |
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timeradd(&end, &now, &end); |
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for (count = 0; timercmp(&now, &end, <); count++) { |
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/* |
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* Test a syscall within a suspended transaction and verify |
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* that it succeeds. |
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*/ |
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FAIL_IF(getppid_tm(true) == -1); /* Should succeed. */ |
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/* |
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* Test a syscall within an active transaction and verify that |
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* it fails with the correct failure code. |
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*/ |
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FAIL_IF(getppid_tm(false) != -1); /* Should fail... */ |
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FAIL_IF(!failure_is_persistent()); /* ...persistently... */ |
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FAIL_IF(!failure_is_syscall()); /* ...with code syscall. */ |
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gettimeofday(&now, 0); |
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} |
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printf("%d active and suspended transactions behaved correctly.\n", count); |
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printf("(There were %d transaction retries.)\n", retries); |
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return 0; |
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} |
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int main(void) |
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{ |
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return test_harness(tm_syscall, "tm_syscall"); |
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}
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