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370
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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660
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4 * Copyright (C) Nginx, Inc.
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370
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.h>
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10
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11 /*
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566
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12 * declare Profiler interface here because
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370
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13 * <google/profiler.h> is C++ header file
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14 */
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15
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16 int ProfilerStart(u_char* fname);
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17 void ProfilerStop(void);
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18 void ProfilerRegisterThread(void);
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19
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20
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21 static void *ngx_google_perftools_create_conf(ngx_cycle_t *cycle);
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22 static ngx_int_t ngx_google_perftools_worker(ngx_cycle_t *cycle);
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23
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24
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25 typedef struct {
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26 ngx_str_t profiles;
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27 } ngx_google_perftools_conf_t;
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28
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29
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30 static ngx_command_t ngx_google_perftools_commands[] = {
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31
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32 { ngx_string("google_perftools_profiles"),
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33 NGX_MAIN_CONF|NGX_DIRECT_CONF|NGX_CONF_TAKE1,
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34 ngx_conf_set_str_slot,
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35 0,
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36 offsetof(ngx_google_perftools_conf_t, profiles),
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37 NULL },
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38
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39 ngx_null_command
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40 };
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41
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42
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43 static ngx_core_module_t ngx_google_perftools_module_ctx = {
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44 ngx_string("google_perftools"),
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45 ngx_google_perftools_create_conf,
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46 NULL
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47 };
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48
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49
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50 ngx_module_t ngx_google_perftools_module = {
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51 NGX_MODULE_V1,
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52 &ngx_google_perftools_module_ctx, /* module context */
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53 ngx_google_perftools_commands, /* module directives */
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54 NGX_CORE_MODULE, /* module type */
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55 NULL, /* init master */
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56 NULL, /* init module */
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57 ngx_google_perftools_worker, /* init process */
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58 NULL, /* init thread */
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59 NULL, /* exit thread */
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60 NULL, /* exit process */
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61 NULL, /* exit master */
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62 NGX_MODULE_V1_PADDING
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63 };
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64
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65
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66 static void *
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67 ngx_google_perftools_create_conf(ngx_cycle_t *cycle)
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68 {
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69 ngx_google_perftools_conf_t *gptcf;
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70
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71 gptcf = ngx_pcalloc(cycle->pool, sizeof(ngx_google_perftools_conf_t));
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72 if (gptcf == NULL) {
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73 return NULL;
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74 }
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75
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76 /*
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566
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77 * set by ngx_pcalloc()
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370
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78 *
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79 * gptcf->profiles = { 0, NULL };
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80 */
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81
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82 return gptcf;
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83 }
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84
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85
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86 static ngx_int_t
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87 ngx_google_perftools_worker(ngx_cycle_t *cycle)
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88 {
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89 u_char *profile;
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90 ngx_google_perftools_conf_t *gptcf;
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91
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92 gptcf = (ngx_google_perftools_conf_t *)
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93 ngx_get_conf(cycle->conf_ctx, ngx_google_perftools_module);
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94
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95 if (gptcf->profiles.len == 0) {
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96 return NGX_OK;
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97 }
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98
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99 profile = ngx_alloc(gptcf->profiles.len + NGX_INT_T_LEN + 2, cycle->log);
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100 if (profile == NULL) {
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101 return NGX_OK;
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102 }
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103
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104 if (getenv("CPUPROFILE")) {
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105 /* disable inherited Profiler enabled in master process */
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106 ProfilerStop();
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107 }
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108
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109 ngx_sprintf(profile, "%V.%d%Z", &gptcf->profiles, ngx_pid);
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110
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111 if (ProfilerStart(profile)) {
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112 /* start ITIMER_PROF timer */
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113 ProfilerRegisterThread();
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114
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115 } else {
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116 ngx_log_error(NGX_LOG_CRIT, cycle->log, ngx_errno,
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117 "ProfilerStart(%s) failed", profile);
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118 }
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119
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120 ngx_free(profile);
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121
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122 return NGX_OK;
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123 }
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124
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125
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126 /* ProfilerStop() is called on Profiler destruction */
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