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annotate src/os/unix/ngx_linux_init.c @ 5245:711fa02afae8

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Valgrind: supressed complaints about uninitialized bytes. Valgrind complains if we pass uninitialized memory to a syscall: ==36492== Syscall param sendmsg(msg.msg_iov[0]) points to uninitialised byte(s) ==36492== at 0x6B5E6A: sendmsg (in /usr/lib/system/libsystem_kernel.dylib) ==36492== by 0x10004288E: ngx_signal_worker_processes (ngx_process_cycle.c:527) ==36492== by 0x1000417A7: ngx_master_process_cycle (ngx_process_cycle.c:203) ==36492== by 0x100001F10: main (nginx.c:410) ==36492== Address 0x7fff5fbff71c is on thread 1's stack Even initialization of all members of the structure passed isn't enough, as there is padding which still remains uninitialized and results in Valgrind complaint. Note there is no real problem here as data from uninitialized memory isn't used.
author Maxim Dounin <mdounin@mdounin.ru>
date Wed, 05 Jun 2013 19:44:22 +0400
parents d620f497c50f
children adba26ff70b5
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
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3 * Copyright (C) Igor Sysoev
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d620f497c50f Copyright updated.
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4 * Copyright (C) Nginx, Inc.
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
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2e069b6e6920 nginx-0.0.1-2003-06-04-21:28:33 import
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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12 u_char ngx_linux_kern_ostype[50];
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13 u_char ngx_linux_kern_osrelease[50];
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15 int ngx_linux_rtsig_max;
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18 static ngx_os_io_t ngx_linux_io = {
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2e069b6e6920 nginx-0.0.1-2003-06-04-21:28:33 import
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19 ngx_unix_recv,
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20 ngx_readv_chain,
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21 ngx_udp_unix_recv,
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0526206251f6 nginx-0.0.10-2004-09-07-19:29:22 import
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22 ngx_unix_send,
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23 #if (NGX_HAVE_SENDFILE)
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24 ngx_linux_sendfile_chain,
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25 NGX_IO_SENDFILE
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26 #else
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27 ngx_writev_chain,
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28 0
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29 #endif
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30 };
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32
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33 ngx_int_t
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34 ngx_os_specific_init(ngx_log_t *log)
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35 {
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36 struct utsname u;
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37
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38 if (uname(&u) == -1) {
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39 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "uname() failed");
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40 return NGX_ERROR;
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41 }
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42
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43 (void) ngx_cpystrn(ngx_linux_kern_ostype, (u_char *) u.sysname,
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44 sizeof(ngx_linux_kern_ostype));
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45
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46 (void) ngx_cpystrn(ngx_linux_kern_osrelease, (u_char *) u.release,
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47 sizeof(ngx_linux_kern_osrelease));
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48
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49 #if (NGX_HAVE_RTSIG)
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50 {
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51 int name[2];
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52 size_t len;
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53 ngx_err_t err;
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54
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55 name[0] = CTL_KERN;
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56 name[1] = KERN_RTSIGMAX;
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57 len = sizeof(ngx_linux_rtsig_max);
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58
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59 if (sysctl(name, 2, &ngx_linux_rtsig_max, &len, NULL, 0) == -1) {
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60 err = ngx_errno;
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61
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62 if (err != NGX_ENOTDIR && err != NGX_ENOSYS) {
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63 ngx_log_error(NGX_LOG_ALERT, log, err,
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64 "sysctl(KERN_RTSIGMAX) failed");
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65
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66 return NGX_ERROR;
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67 }
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68
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69 ngx_linux_rtsig_max = 0;
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70 }
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71
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72 }
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73 #endif
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74
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75 ngx_os_io = ngx_linux_io;
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76
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77 return NGX_OK;
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78 }
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81 void
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82 ngx_os_specific_status(ngx_log_t *log)
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83 {
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84 ngx_log_error(NGX_LOG_NOTICE, log, 0, "OS: %s %s",
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85 ngx_linux_kern_ostype, ngx_linux_kern_osrelease);
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86
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87 #if (NGX_HAVE_RTSIG)
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88 ngx_log_error(NGX_LOG_NOTICE, log, 0, "sysctl(KERN_RTSIGMAX): %d",
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89 ngx_linux_rtsig_max);
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90 #endif
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91 }