>From 5d81fb381768463ac02881edb5e8caf3896e9c48 Mon Sep 17 00:00:00 2001 From: Akira Yokosawa <akiyks@xxxxxxxxx> Date: Tue, 6 Jun 2017 00:06:44 +0900 Subject: [PATCH 1/5] CodeSamples: Remove gprof-helper.c Paul confirmed that he no longer needs this. Also remove its entry in .gitignore. Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx> --- CodeSamples/.gitignore | 1 - CodeSamples/gprof-helper.c | 118 --------------------------------------------- 2 files changed, 119 deletions(-) delete mode 100644 CodeSamples/gprof-helper.c diff --git a/CodeSamples/.gitignore b/CodeSamples/.gitignore index e116055..042e44d 100644 --- a/CodeSamples/.gitignore +++ b/CodeSamples/.gitignore @@ -1,3 +1,2 @@ -/gprof-helper.c /Makefile.arch /api.h diff --git a/CodeSamples/gprof-helper.c b/CodeSamples/gprof-helper.c deleted file mode 100644 index e413b17..0000000 --- a/CodeSamples/gprof-helper.c +++ /dev/null @@ -1,118 +0,0 @@ -/* gprof-helper.c -- preload library to profile pthread-enabled programs - * - * Authors: Sam Hocevar <sam at zoy dot org> - * Daniel Jönsson <danieljo at fagotten dot org> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the Do What The Fuck You Want To - * Public License as published by Banlu Kemiyatorn. See - * http://sam.zoy.org/projects/COPYING.WTFPL for more details. - * - * Compilation example: - * gcc -shared -fPIC gprof-helper.c -o gprof-helper.so -lpthread -ldl - * - * Usage example: - * LD_PRELOAD=./gprof-helper.so your_program - */ - -#define _GNU_SOURCE -#include <sys/time.h> -#include <stdio.h> -#include <stdlib.h> -#include <dlfcn.h> -#include <pthread.h> - -static void * wrapper_routine(void *); - -/* Original pthread function */ -static int (*pthread_create_orig)(pthread_t *__restrict, - __const pthread_attr_t *__restrict, - void *(*)(void *), void *__restrict) = NULL; - -/* Library initialization function */ -void wooinit(void) __attribute__((constructor)); - -void wooinit(void) -{ - pthread_create_orig = dlsym(RTLD_NEXT, "pthread_create"); - fprintf(stderr, "pthreads: using profiling hooks for gprof\n"); - if(pthread_create_orig == NULL) { - char *error = dlerror(); - if(error == NULL) { - error = "pthread_create is NULL"; - } - fprintf(stderr, "%s\n", error); - exit(EXIT_FAILURE); - } -} - -/* Our data structure passed to the wrapper */ -typedef struct wrapper_s -{ - void * (*start_routine)(void *); - void * arg; - - pthread_mutex_t lock; - pthread_cond_t wait; - - struct itimerval itimer; - -} wrapper_t; - -/* The wrapper function in charge for setting the itimer value */ -static void * wrapper_routine(void * data) -{ - /* Put user data in thread-local variables */ - void * (*start_routine)(void *) = ((wrapper_t*)data)->start_routine; - void * arg = ((wrapper_t*)data)->arg; - - /* Set the profile timer value */ - setitimer(ITIMER_PROF, &((wrapper_t*)data)->itimer, NULL); - - /* Tell the calling thread that we don't need its data anymore */ - pthread_mutex_lock(&((wrapper_t*)data)->lock); - pthread_cond_signal(&((wrapper_t*)data)->wait); - pthread_mutex_unlock(&((wrapper_t*)data)->lock); - - /* Call the real function */ - return start_routine(arg); -} - -/* Our wrapper function for the real pthread_create() */ -int pthread_create(pthread_t *__restrict thread, - __const pthread_attr_t *__restrict attr, - void * (*start_routine)(void *), - void *__restrict arg) -{ - wrapper_t wrapper_data; - int i_return; - - /* Initialize the wrapper structure */ - wrapper_data.start_routine = start_routine; - wrapper_data.arg = arg; - getitimer(ITIMER_PROF, &wrapper_data.itimer); - pthread_cond_init(&wrapper_data.wait, NULL); - pthread_mutex_init(&wrapper_data.lock, NULL); - pthread_mutex_lock(&wrapper_data.lock); - - /* The real pthread_create call */ - i_return = pthread_create_orig(thread, - attr, - &wrapper_routine, - &wrapper_data); - - /* - * If the thread was successfully spawned, wait for the data - * to be released - */ - - if(i_return == 0) { - pthread_cond_wait(&wrapper_data.wait, &wrapper_data.lock); - } - - pthread_mutex_unlock(&wrapper_data.lock); - pthread_mutex_destroy(&wrapper_data.lock); - pthread_cond_destroy(&wrapper_data.wait); - - return i_return; -} -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe perfbook" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
