/*
* Copyright ( C ) 2019 The Android Open Source Project
* All rights reserved .
*
* Redistribution and use in source and binary forms , with or without
* modification , are permitted provided that the following conditions
* are met :
* * Redistributions of source code must retain the above copyright
* notice , this list of conditions and the following disclaimer .
* * Redistributions in binary form must reproduce the above copyright
* notice , this list of conditions and the following disclaimer in
* the documentation and / or other materials provided with the
* distribution .
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* " AS IS " AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT
* LIMITED TO , THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED . IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT , INDIRECT ,
* INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING ,
* BUT NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS
* OF USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY ,
* OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE .
*/
// Prevent tests from being compiled with glibc because thread_properties.h
// only exists in Bionic.
#if defined (__BIONIC__)
#include <sys/thread_properties.h>
#include <assert.h>
#include <dlfcn.h>
#include <elf.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <sched.h>
#include <stdio.h>
#include <string.h>
#include <sys/prctl.h>
#include <sys/ptrace.h>
#include <sys/uio.h>
#include <sys/user.h>
#include <sys/wait.h>
#include <unistd.h>
// Helper binary to use TLS-related functions in thread_properties
// Tests __get_static_tls_bound.
thread_local int local_var;
void test_static_tls_bounds() {
local_var = 123 ;
void * start_addr = nullptr;
void * end_addr = nullptr;
__libc_get_static_tls_bounds(reinterpret_cast <void **>(&start_addr),
reinterpret_cast <void **>(&end_addr));
assert(start_addr != nullptr);
assert(end_addr != nullptr);
assert(&local_var >= start_addr && &local_var < end_addr);
printf("done_get_static_tls_bounds\n" );
}
// Tests iterate_dynamic tls chunks.
// Export a var from the shared so.
__thread char large_tls_var[4 * 1024 * 1024 ];
// found_count has to be Global variable so that the non-capturing lambda
// can access it.
int found_count = 0 ;
void test_iter_tls() {
void * lib = dlopen("libtest_elftls_dynamic.so" , RTLD_LOCAL | RTLD_NOW);
large_tls_var[1025 ] = 'a' ;
auto cb = +[](void * dtls_begin, void * dtls_end, size_t dso_id, void * arg) {
if (&large_tls_var >= dtls_begin && &large_tls_var < dtls_end) ++found_count;
};
__libc_iterate_dynamic_tls(gettid(), cb, nullptr);
// It should be found exactly once.
assert(found_count == 1 );
printf("done_iterate_dynamic_tls\n" );
}
void * parent_addr = nullptr;
void test_iterate_another_thread_tls() {
large_tls_var[1025 ] = 'b' ;
parent_addr = &large_tls_var;
found_count = 0 ;
pid_t pid = fork();
assert(pid != -1 );
int status;
if (pid) {
// Parent.
assert(pid == wait(&status));
assert(0 == status);
} else {
// Child.
pid_t parent_pid = getppid();
assert(0 == ptrace(PTRACE_ATTACH, parent_pid));
assert(parent_pid == waitpid(parent_pid, &status, 0 ));
auto cb = +[](void * dtls_begin, void * dtls_end, size_t dso_id, void * arg) {
if (parent_addr >= dtls_begin && parent_addr < dtls_end) ++found_count;
};
__libc_iterate_dynamic_tls(parent_pid, cb, nullptr);
// It should be found exactly once.
assert(found_count == 1 );
printf("done_iterate_another_thread_tls\n" );
}
}
int main() {
test_static_tls_bounds();
test_iter_tls();
test_iterate_another_thread_tls();
return 0 ;
}
#else
int main() {
return 0 ;
}
#endif // __BIONIC__
Messung V0.5 in Prozent C=94 H=94 G=93
¤ Dauer der Verarbeitung: 0.9 Sekunden
(vorverarbeitet am 2026-06-28)
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