X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-context-procname.c;h=c6d02cf60d3b0692dd449e5f12f08a32b08307bf;hb=HEAD;hp=b9bae82eba91be79fdd2ca1749fe2e5f2066b570;hpb=4c1ee94e5ef9ac3efb4a036108a9ff4eb24c238c;p=lttng-ust.git diff --git a/liblttng-ust/lttng-context-procname.c b/liblttng-ust/lttng-context-procname.c deleted file mode 100644 index b9bae82e..00000000 --- a/liblttng-ust/lttng-context-procname.c +++ /dev/null @@ -1,88 +0,0 @@ -/* - * (C) Copyright 2009-2011 - - * Mathieu Desnoyers - * - * LTTng UST procname context. - * - * Dual LGPL v2.1/GPL v2 license. - */ - -#include -#include -#include -#include -#include - -#define PROCNAME_LEN 17 /* includes \0 */ - -/* - * We cache the result to ensure we don't trigger a system call for - * each event. - * Upon exec, procname changes, but exec takes care of throwing away - * this cached version. - */ -static char cached_procname[17]; - -static inline -char *wrapper_getprocname(void) -{ - int ret; - - if (caa_unlikely(!cached_procname[0])) { - ret = prctl(PR_GET_NAME, (unsigned long) cached_procname, - 0, 0, 0); - assert(!ret); - } - return cached_procname; -} - -void lttng_context_procname_reset(void) -{ - cached_procname[0] = '\0'; -} - -static -size_t procname_get_size(size_t offset) -{ - size_t size = 0; - - size += PROCNAME_LEN; - return size; -} - -static -void procname_record(struct lttng_ctx_field *field, - struct lttng_ust_lib_ring_buffer_ctx *ctx, - struct ltt_channel *chan) -{ - char *procname; - - procname = wrapper_getprocname(); - chan->ops->event_write(ctx, procname, PROCNAME_LEN); -} - -int lttng_add_procname_to_ctx(struct lttng_ctx **ctx) -{ - struct lttng_ctx_field *field; - - field = lttng_append_context(ctx); - if (!field) - return -ENOMEM; - if (lttng_find_context(*ctx, "procname")) { - lttng_remove_context_field(ctx, field); - return -EEXIST; - } - field->event_field.name = "procname"; - field->event_field.type.atype = atype_array; - field->event_field.type.u.array.elem_type.atype = atype_integer; - field->event_field.type.u.array.elem_type.u.basic.integer.size = sizeof(char) * CHAR_BIT; - field->event_field.type.u.array.elem_type.u.basic.integer.alignment = lttng_alignof(char) * CHAR_BIT; - field->event_field.type.u.array.elem_type.u.basic.integer.signedness = lttng_is_signed_type(char); - field->event_field.type.u.array.elem_type.u.basic.integer.reverse_byte_order = 0; - field->event_field.type.u.array.elem_type.u.basic.integer.base = 10; - field->event_field.type.u.array.elem_type.u.basic.integer.encoding = lttng_encode_UTF8; - field->event_field.type.u.array.length = PROCNAME_LEN; - field->get_size = procname_get_size; - field->record = procname_record; - return 0; -}