Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 1 | #include "../perf.h" |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 2 | #include "util.h" |
Frederic Weisbecker | 69e3f52 | 2010-01-16 14:21:15 +0100 | [diff] [blame] | 3 | #include <sys/mman.h> |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame^] | 4 | #include <execinfo.h> |
| 5 | #include <stdio.h> |
| 6 | #include <stdlib.h> |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 7 | |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 8 | /* |
| 9 | * XXX We need to find a better place for these things... |
| 10 | */ |
| 11 | bool perf_host = true; |
Joerg Roedel | c4a7dca | 2012-02-10 18:05:05 +0100 | [diff] [blame] | 12 | bool perf_guest = false; |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 13 | |
| 14 | void event_attr_init(struct perf_event_attr *attr) |
| 15 | { |
| 16 | if (!perf_host) |
| 17 | attr->exclude_host = 1; |
| 18 | if (!perf_guest) |
| 19 | attr->exclude_guest = 1; |
Stephane Eranian | 7e1ccd3 | 2012-02-09 16:12:38 +0100 | [diff] [blame] | 20 | /* to capture ABI version */ |
| 21 | attr->size = sizeof(*attr); |
Joerg Roedel | 1aed267 | 2012-01-04 17:54:20 +0100 | [diff] [blame] | 22 | } |
| 23 | |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 24 | int mkdir_p(char *path, mode_t mode) |
| 25 | { |
| 26 | struct stat st; |
| 27 | int err; |
| 28 | char *d = path; |
| 29 | |
| 30 | if (*d != '/') |
| 31 | return -1; |
| 32 | |
| 33 | if (stat(path, &st) == 0) |
| 34 | return 0; |
| 35 | |
| 36 | while (*++d == '/'); |
| 37 | |
| 38 | while ((d = strchr(d, '/'))) { |
| 39 | *d = '\0'; |
| 40 | err = stat(path, &st) && mkdir(path, mode); |
| 41 | *d++ = '/'; |
| 42 | if (err) |
| 43 | return -1; |
| 44 | while (*d == '/') |
| 45 | ++d; |
| 46 | } |
| 47 | return (stat(path, &st) && mkdir(path, mode)) ? -1 : 0; |
| 48 | } |
| 49 | |
Arnaldo Carvalho de Melo | 9e20144 | 2010-01-14 18:30:06 -0200 | [diff] [blame] | 50 | static int slow_copyfile(const char *from, const char *to) |
| 51 | { |
| 52 | int err = 0; |
| 53 | char *line = NULL; |
| 54 | size_t n; |
| 55 | FILE *from_fp = fopen(from, "r"), *to_fp; |
| 56 | |
| 57 | if (from_fp == NULL) |
| 58 | goto out; |
| 59 | |
| 60 | to_fp = fopen(to, "w"); |
| 61 | if (to_fp == NULL) |
| 62 | goto out_fclose_from; |
| 63 | |
| 64 | while (getline(&line, &n, from_fp) > 0) |
| 65 | if (fputs(line, to_fp) == EOF) |
| 66 | goto out_fclose_to; |
| 67 | err = 0; |
| 68 | out_fclose_to: |
| 69 | fclose(to_fp); |
| 70 | free(line); |
| 71 | out_fclose_from: |
| 72 | fclose(from_fp); |
| 73 | out: |
| 74 | return err; |
| 75 | } |
| 76 | |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 77 | int copyfile(const char *from, const char *to) |
| 78 | { |
| 79 | int fromfd, tofd; |
| 80 | struct stat st; |
| 81 | void *addr; |
| 82 | int err = -1; |
| 83 | |
| 84 | if (stat(from, &st)) |
| 85 | goto out; |
| 86 | |
Arnaldo Carvalho de Melo | 9e20144 | 2010-01-14 18:30:06 -0200 | [diff] [blame] | 87 | if (st.st_size == 0) /* /proc? do it slowly... */ |
| 88 | return slow_copyfile(from, to); |
| 89 | |
Arnaldo Carvalho de Melo | 4cf4013 | 2009-12-27 21:37:06 -0200 | [diff] [blame] | 90 | fromfd = open(from, O_RDONLY); |
| 91 | if (fromfd < 0) |
| 92 | goto out; |
| 93 | |
| 94 | tofd = creat(to, 0755); |
| 95 | if (tofd < 0) |
| 96 | goto out_close_from; |
| 97 | |
| 98 | addr = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fromfd, 0); |
| 99 | if (addr == MAP_FAILED) |
| 100 | goto out_close_to; |
| 101 | |
| 102 | if (write(tofd, addr, st.st_size) == st.st_size) |
| 103 | err = 0; |
| 104 | |
| 105 | munmap(addr, st.st_size); |
| 106 | out_close_to: |
| 107 | close(tofd); |
| 108 | if (err) |
| 109 | unlink(to); |
| 110 | out_close_from: |
| 111 | close(fromfd); |
| 112 | out: |
| 113 | return err; |
| 114 | } |
Arnaldo Carvalho de Melo | c82ee82 | 2010-05-14 14:19:35 -0300 | [diff] [blame] | 115 | |
| 116 | unsigned long convert_unit(unsigned long value, char *unit) |
| 117 | { |
| 118 | *unit = ' '; |
| 119 | |
| 120 | if (value > 1000) { |
| 121 | value /= 1000; |
| 122 | *unit = 'K'; |
| 123 | } |
| 124 | |
| 125 | if (value > 1000) { |
| 126 | value /= 1000; |
| 127 | *unit = 'M'; |
| 128 | } |
| 129 | |
| 130 | if (value > 1000) { |
| 131 | value /= 1000; |
| 132 | *unit = 'G'; |
| 133 | } |
| 134 | |
| 135 | return value; |
| 136 | } |
Arnaldo Carvalho de Melo | 1e7972c | 2011-01-03 16:50:55 -0200 | [diff] [blame] | 137 | |
| 138 | int readn(int fd, void *buf, size_t n) |
| 139 | { |
| 140 | void *buf_start = buf; |
| 141 | |
| 142 | while (n) { |
| 143 | int ret = read(fd, buf, n); |
| 144 | |
| 145 | if (ret <= 0) |
| 146 | return ret; |
| 147 | |
| 148 | n -= ret; |
| 149 | buf += ret; |
| 150 | } |
| 151 | |
| 152 | return buf - buf_start; |
| 153 | } |
Arnaldo Carvalho de Melo | 61e04b3 | 2012-04-19 13:15:24 -0300 | [diff] [blame] | 154 | |
| 155 | size_t hex_width(u64 v) |
| 156 | { |
| 157 | size_t n = 1; |
| 158 | |
| 159 | while ((v >>= 4)) |
| 160 | ++n; |
| 161 | |
| 162 | return n; |
| 163 | } |
Arnaldo Carvalho de Melo | dc4552b | 2012-08-07 23:32:05 -0300 | [diff] [blame^] | 164 | |
| 165 | /* Obtain a backtrace and print it to stdout. */ |
| 166 | void dump_stack(void) |
| 167 | { |
| 168 | void *array[16]; |
| 169 | size_t size = backtrace(array, ARRAY_SIZE(array)); |
| 170 | char **strings = backtrace_symbols(array, size); |
| 171 | size_t i; |
| 172 | |
| 173 | printf("Obtained %zd stack frames.\n", size); |
| 174 | |
| 175 | for (i = 0; i < size; i++) |
| 176 | printf("%s\n", strings[i]); |
| 177 | |
| 178 | free(strings); |
| 179 | } |