/*
|
* 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.
|
*/
|
|
// This shared object test library is dlopen'ed by the main test executable.
|
|
// Export a large TLS variable from a solib for testing dladdr and dlsym. The
|
// TLS symbol's value will appear to overlap almost everything else in the
|
// shared object, but dladdr must not return it.
|
__thread char large_tls_var[4 * 1024 * 1024];
|
|
extern "C" char* get_large_tls_var_addr() {
|
return large_tls_var;
|
}
|
|
// For testing dladdr, return an address that's part of the solib's .bss
|
// section, but does not have an entry in the dynsym table and whose
|
// solib-relative address appears to overlap with the large TLS variable.
|
extern "C" void* get_local_addr() {
|
static char dummy[1024];
|
return &dummy[512];
|
}
|
|
// This variable comes from libtest_elftls_shared_var.so, which is part of
|
// static TLS. Verify that a GD-model access can access the variable.
|
//
|
// Accessing the static TLS variable from an solib prevents the static linker
|
// from relaxing the GD access to IE and lets us test that __tls_get_addr and
|
// the tlsdesc resolver handle a static TLS variable.
|
extern "C" __thread int elftls_shared_var;
|
|
extern "C" int bump_shared_var() {
|
return ++elftls_shared_var;
|
}
|
|
// The static linker denotes the current module by omitting the symbol from
|
// the DTPMOD/TLSDESC relocations.
|
static __thread int local_var_1 = 15;
|
static __thread int local_var_2 = 25;
|
|
extern "C" int bump_local_vars() {
|
return ++local_var_1 + ++local_var_2;
|
}
|
|
__attribute__((weak)) extern "C" __thread int missing_weak_dyn_tls;
|
|
extern "C" int* missing_weak_dyn_tls_addr() {
|
return &missing_weak_dyn_tls;
|
}
|
