sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 1 | |
| 2 | #include <pthread.h> |
| 3 | #include <stdio.h> |
| 4 | #include <stdlib.h> |
| 5 | |
| 6 | /* Simple test program, no race. Parent and child both modify x and |
| 7 | use the hardware bus lock. */ |
| 8 | |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 9 | #undef PLAT_x86_darwin |
| 10 | #undef PLAT_amd64_darwin |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 11 | #undef PLAT_x86_linux |
| 12 | #undef PLAT_amd64_linux |
| 13 | #undef PLAT_ppc32_linux |
| 14 | #undef PLAT_ppc64_linux |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 15 | #undef PLAT_arm_linux |
sewardj | 23ed630 | 2014-03-18 23:02:59 +0000 | [diff] [blame] | 16 | #undef PLAT_arm64_linux |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 17 | #undef PLAT_s390x_linux |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 18 | #undef PLAT_mips32_linux |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 19 | #undef PLAT_x86_solaris |
| 20 | #undef PLAT_amd64_solaris |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 21 | |
sewardj | 6e9de46 | 2011-06-28 07:25:29 +0000 | [diff] [blame] | 22 | #if defined(__APPLE__) && defined(__i386__) |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 23 | # define PLAT_x86_darwin 1 |
| 24 | #elif defined(__APPLE__) && defined(__x86_64__) |
| 25 | # define PLAT_amd64_darwin 1 |
| 26 | #elif defined(__linux__) && defined(__i386__) |
| 27 | # define PLAT_x86_linux 1 |
| 28 | #elif defined(__linux__) && defined(__x86_64__) |
| 29 | # define PLAT_amd64_linux 1 |
| 30 | #elif defined(__linux__) && defined(__powerpc__) && !defined(__powerpc64__) |
| 31 | # define PLAT_ppc32_linux 1 |
| 32 | #elif defined(__linux__) && defined(__powerpc__) && defined(__powerpc64__) |
| 33 | # define PLAT_ppc64_linux 1 |
sewardj | 23ed630 | 2014-03-18 23:02:59 +0000 | [diff] [blame] | 34 | #elif defined(__linux__) && defined(__arm__) && !defined(__aarch64__) |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 35 | # define PLAT_arm_linux 1 |
sewardj | 23ed630 | 2014-03-18 23:02:59 +0000 | [diff] [blame] | 36 | #elif defined(__linux__) && defined(__aarch64__) && !defined(__arm__) |
| 37 | # define PLAT_arm64_linux 1 |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 38 | #elif defined(__linux__) && defined(__s390x__) |
| 39 | # define PLAT_s390x_linux 1 |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 40 | #elif defined(__linux__) && defined(__mips__) |
| 41 | # define PLAT_mips32_linux 1 |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 42 | #elif defined(__sun__) && defined(__i386__) |
| 43 | # define PLAT_x86_solaris 1 |
| 44 | #elif defined(__sun__) && defined(__x86_64__) |
| 45 | # define PLAT_amd64_solaris 1 |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 46 | #endif |
| 47 | |
sewardj | f5b5f84 | 2010-01-04 10:47:25 +0000 | [diff] [blame] | 48 | #if defined(PLAT_amd64_linux) || defined(PLAT_x86_linux) \ |
sewardj | 8eb8bab | 2015-07-21 14:44:28 +0000 | [diff] [blame] | 49 | || defined(PLAT_amd64_darwin) || defined(PLAT_x86_darwin) \ |
| 50 | || defined(PLAT_amd64_solaris) || defined(PLAT_x86_solaris) |
sewardj | 2ee3395 | 2007-11-27 11:23:55 +0000 | [diff] [blame] | 51 | # define INC(_lval,_lqual) \ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 52 | __asm__ __volatile__ ( \ |
| 53 | "lock ; incl (%0)" : /*out*/ : /*in*/"r"(&(_lval)) : "memory", "cc" ) |
sewardj | 6e9de46 | 2011-06-28 07:25:29 +0000 | [diff] [blame] | 54 | #elif defined(PLAT_ppc32_linux) || defined(PLAT_ppc64_linux) |
sewardj | 2ee3395 | 2007-11-27 11:23:55 +0000 | [diff] [blame] | 55 | # define INC(_lval,_lqual) \ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 56 | __asm__ __volatile__( \ |
sewardj | d12c4a5 | 2011-03-28 08:37:19 +0000 | [diff] [blame] | 57 | "1:\n" \ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 58 | " lwarx 15,0,%0\n" \ |
| 59 | " addi 15,15,1\n" \ |
| 60 | " stwcx. 15,0,%0\n" \ |
sewardj | d12c4a5 | 2011-03-28 08:37:19 +0000 | [diff] [blame] | 61 | " bne- 1b\n" \ |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 62 | : /*out*/ : /*in*/ "b"(&(_lval)) \ |
| 63 | : /*trash*/ "r15", "cr0", "memory" \ |
| 64 | ) |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 65 | #elif defined(PLAT_arm_linux) |
| 66 | # define INC(_lval,_lqual) \ |
| 67 | __asm__ __volatile__( \ |
sewardj | d12c4a5 | 2011-03-28 08:37:19 +0000 | [diff] [blame] | 68 | "1:\n" \ |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 69 | " ldrex r8, [%0, #0]\n" \ |
| 70 | " add r8, r8, #1\n" \ |
| 71 | " strex r9, r8, [%0, #0]\n" \ |
| 72 | " cmp r9, #0\n" \ |
sewardj | d12c4a5 | 2011-03-28 08:37:19 +0000 | [diff] [blame] | 73 | " bne 1b\n" \ |
sewardj | 8777f73 | 2010-01-02 10:43:23 +0000 | [diff] [blame] | 74 | : /*out*/ : /*in*/ "r"(&(_lval)) \ |
| 75 | : /*trash*/ "r8", "r9", "cc", "memory" \ |
| 76 | ); |
sewardj | 23ed630 | 2014-03-18 23:02:59 +0000 | [diff] [blame] | 77 | #elif defined(PLAT_arm64_linux) |
| 78 | # define INC(_lval,_lqual) \ |
| 79 | __asm__ __volatile__( \ |
| 80 | "1:\n" \ |
| 81 | " ldxr w8, [%0, #0]\n" \ |
| 82 | " add w8, w8, #1\n" \ |
| 83 | " stxr w9, w8, [%0, #0]\n" \ |
| 84 | " cmp w9, #0\n" \ |
| 85 | " bne 1b\n" \ |
| 86 | : /*out*/ : /*in*/ "r"(&(_lval)) \ |
| 87 | : /*trash*/ "x8", "x9", "cc", "memory" \ |
| 88 | ); |
sewardj | b5b8740 | 2011-03-07 16:05:35 +0000 | [diff] [blame] | 89 | #elif defined(PLAT_s390x_linux) |
| 90 | # define INC(_lval,_lqual) \ |
| 91 | __asm__ __volatile__( \ |
| 92 | "1: l 0,%0\n" \ |
| 93 | " lr 1,0\n" \ |
| 94 | " ahi 1,1\n" \ |
| 95 | " cs 0,1,%0\n" \ |
| 96 | " jl 1b\n" \ |
| 97 | : "+m" (_lval) :: "cc", "1","2" \ |
| 98 | ) |
sewardj | 5db1540 | 2012-06-07 09:13:21 +0000 | [diff] [blame] | 99 | #elif defined(PLAT_mips32_linux) |
| 100 | # define INC(_lval,_lqual) \ |
| 101 | __asm__ __volatile__ ( \ |
| 102 | "1:\n" \ |
| 103 | " move $8, %0\n" \ |
| 104 | " ll $9, 0($8)\n" \ |
| 105 | " addiu $9, $9, 1\n" \ |
| 106 | " sc $9, 0($8)\n" \ |
| 107 | " li $10, 1\n" \ |
| 108 | " bne $9, $10, 1b\n" \ |
| 109 | " nop\n" \ |
| 110 | : /*out*/ : /*in*/ "r"(&(_lval)) \ |
| 111 | : /*trash*/ "$8", "$9", "$10", "cc", "memory" \ |
| 112 | ) |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 113 | #else |
| 114 | # error "Fix Me for this platform" |
| 115 | #endif |
| 116 | |
| 117 | |
| 118 | int x = 0; |
| 119 | |
| 120 | void* child_fn ( void* arg ) |
| 121 | { |
sewardj | 2ee3395 | 2007-11-27 11:23:55 +0000 | [diff] [blame] | 122 | INC(x, "childfn"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | int main ( void ) |
| 127 | { |
| 128 | pthread_t child; |
| 129 | |
| 130 | if (pthread_create(&child, NULL, child_fn, NULL)) { |
| 131 | perror("pthread_create"); |
| 132 | exit(1); |
| 133 | } |
| 134 | |
sewardj | 2ee3395 | 2007-11-27 11:23:55 +0000 | [diff] [blame] | 135 | INC(x, "main"); |
sewardj | b411202 | 2007-11-09 22:49:28 +0000 | [diff] [blame] | 136 | |
| 137 | if (pthread_join(child, NULL)) { |
| 138 | perror("pthread join"); |
| 139 | exit(1); |
| 140 | } |
| 141 | |
| 142 | printf("x = %d\n", x); |
| 143 | return 0; |
| 144 | } |