common: compile libcommon as C++

[lttng-tools.git] / src / common / defaults.c

diff --git a/src/common/defaults.c b/src/common/defaults.c
deleted file mode 100644 (file)
index 2550784..0000000
--- a/src/common/defaults.c
+++ /dev/null
@@ -1,153 +0,0 @@
-/*
- * Copyright (C) 2012 Simon Marchi <simon.marchi@polymtl.ca>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <stddef.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <sys/resource.h>
-#include <pthread.h>
-
-#include "defaults.h"
-#include "macros.h"
-#include "error.h"
-
-static int pthread_attr_init_done;
-static pthread_attr_t tattr;
-
-static size_t get_page_size(void)
-{
-       const long ret = sysconf(_SC_PAGE_SIZE);
-
-       if (ret < 0) {
-               /*
-                * Fatal error since there is no safe way to recover from this.
-                */
-               PERROR("Failed to get system page size using sysconf(_SC_PAGE_SIZE)");
-               abort();
-       }
-
-       return (size_t) ret;
-}
-
-size_t default_get_channel_subbuf_size(void)
-{
-       return max(_DEFAULT_CHANNEL_SUBBUF_SIZE, get_page_size());
-}
-
-size_t default_get_metadata_subbuf_size(void)
-{
-       return max(DEFAULT_METADATA_SUBBUF_SIZE, get_page_size());
-}
-
-size_t default_get_kernel_channel_subbuf_size(void)
-{
-       return max(DEFAULT_KERNEL_CHANNEL_SUBBUF_SIZE, get_page_size());
-}
-
-size_t default_get_ust_pid_channel_subbuf_size(void)
-{
-       return max(DEFAULT_UST_PID_CHANNEL_SUBBUF_SIZE, get_page_size());
-}
-
-size_t default_get_ust_uid_channel_subbuf_size(void)
-{
-       return max(DEFAULT_UST_UID_CHANNEL_SUBBUF_SIZE, get_page_size());
-}
-
-pthread_attr_t *default_pthread_attr(void)
-{
-       if (pthread_attr_init_done) {
-               return &tattr;
-       }
-
-       WARN("Uninitialized pthread attributes, using libc defaults.");
-       return NULL;
-}
-
-static void __attribute__((constructor)) init_default_pthread_attr(void)
-{
-       int ret;
-       struct rlimit rlim;
-       size_t pthread_ss, system_ss, selected_ss;
-
-       ret = pthread_attr_init(&tattr);
-       if (ret) {
-               errno = ret;
-               PERROR("pthread_attr_init");
-               goto error;
-       }
-
-       /* Get system stack size limits. */
-       ret = getrlimit(RLIMIT_STACK, &rlim);
-       if (ret < 0) {
-               PERROR("getrlimit");
-               goto error_destroy;
-       }
-       DBG("Stack size limits: soft %lld, hard %lld bytes",
-                       (long long) rlim.rlim_cur,
-                       (long long) rlim.rlim_max);
-
-       /*
-        * getrlimit() may return a stack size of "-1", meaning "unlimited".
-        * In this case, we impose a known-good default minimum value which will
-        * override the libc's default stack size if it is smaller.
-        */
-       system_ss = rlim.rlim_cur != -1 ? rlim.rlim_cur :
-                       DEFAULT_LTTNG_THREAD_STACK_SIZE;
-
-       /* Get pthread default thread stack size. */
-       ret = pthread_attr_getstacksize(&tattr, &pthread_ss);
-       if (ret < 0) {
-               PERROR("pthread_attr_getstacksize");
-               goto error_destroy;
-       }
-       DBG("Default pthread stack size is %zu bytes", pthread_ss);
-
-       selected_ss = max_t(size_t, pthread_ss, system_ss);
-       if (selected_ss < DEFAULT_LTTNG_THREAD_STACK_SIZE) {
-               DBG("Default stack size is too small, setting it to %zu bytes",
-                       (size_t) DEFAULT_LTTNG_THREAD_STACK_SIZE);
-               selected_ss = DEFAULT_LTTNG_THREAD_STACK_SIZE;
-       }
-
-       if (rlim.rlim_max > 0 && selected_ss > rlim.rlim_max) {
-               WARN("Your system's stack size restrictions (%zu bytes) may be too low for the LTTng daemons to function properly, please set the stack size limit to at least %zu bytes to ensure reliable operation",
-                       (size_t) rlim.rlim_max, (size_t) DEFAULT_LTTNG_THREAD_STACK_SIZE);
-               selected_ss = (size_t) rlim.rlim_max;
-       }
-
-       ret = pthread_attr_setstacksize(&tattr, selected_ss);
-       if (ret < 0) {
-               PERROR("pthread_attr_setstacksize");
-               goto error_destroy;
-       }
-       pthread_attr_init_done = 1;
-error:
-       return;
-error_destroy:
-       ret = pthread_attr_destroy(&tattr);
-       if (ret) {
-               errno = ret;
-               PERROR("pthread_attr_destroy");
-       }
-}
-
-static void __attribute__((destructor)) fini_default_pthread_attr(void)
-{
-       int ret;
-
-       if (!pthread_attr_init_done) {
-               return;
-       }
-
-       ret = pthread_attr_destroy(&tattr);
-       if (ret) {
-               errno = ret;
-               PERROR("pthread_attr_destroy");
-       }
-}