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// tls_test.cc -- test TLS variables for gold
// Copyright (C) 2006-2021 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
// This provides a set of test functions for TLS variables. The
// functions are called by a main function in tls_test_main.cc. This
// lets us test TLS access from a shared library. We currently don't
// bother to test TLS access between two different files, on the
// theory that that is no more complicated than ordinary variable
// access between files.
// We start two threads, and stop the second one. Then we run the
// first thread through the following cases. Then we let the second
// thread continue, and run it through the same set of cases. All the
// actual thread manipulation is in tls_test_main.cc.
// 1 Access to an uninitialized global thread variable.
// 2 Access to an uninitialized static thread variable.
// 3 Access to an initialized global thread variable.
// 4 Access to an initialized static thread variable.
// 5 Taking the address of a global thread variable.
// 6 Taking the address of a static thread variable.
// 8 Like test 1, but with the thread variable defined in another file.
// 9 Like test 3, but with the thread variable defined in another file.
// 10 Like test 5, but with the thread variable defined in another file.
// last Verify that the above tests left the variables set correctly.
#include "config.h"
#include <cstdio>
#include "tls_test.h"
#define CHECK_EQ_OR_RETURN(var, expected) \
do \
{ \
if ((var) != (expected)) \
{ \
printf(#var ": expected %d, found %d\n", expected, var); \
return false; \
} \
} \
while (0)
__thread int v1;
static __thread int v2;
// We don't use these pointers, but putting them in tests alignment on
// a 64-bit target.
__thread char* p1;
char dummy;
__thread char* p2 = &dummy;
__thread int v3 = 3;
static __thread int v4 = 4;
__thread int v5;
static __thread int v6;
struct int128
{
long long hi;
long long lo;
};
static __thread struct int128 v12 = { 115, 125 };
bool
t1()
{
CHECK_EQ_OR_RETURN(v1, 0);
v1 = 10;
return true;
}
bool
t2()
{
CHECK_EQ_OR_RETURN(v2, 0);
v2 = 20;
return true;
}
bool
t3()
{
CHECK_EQ_OR_RETURN(v3, 3);
v3 = 30;
return true;
}
bool
t4()
{
CHECK_EQ_OR_RETURN(v4, 4);
v4 = 40;
return true;
}
// For test 5 the main function calls f5b(f5a()), then calls t5().
int*
f5a()
{
return &v5;
}
void
f5b(int* p)
{
*p = 50;
}
bool
t5()
{
CHECK_EQ_OR_RETURN(v5, 50);
return true;
}
// For test 6 the main function calls f6b(f6a()), then calls t6().
int*
f6a()
{
return &v6;
}
void
f6b(int* p)
{
*p = 60;
}
bool
t6()
{
CHECK_EQ_OR_RETURN(v6, 60);
return true;
}
// The slot for t7() is unused.
bool
t8()
{
CHECK_EQ_OR_RETURN(o1, 0);
o1 = -10;
return true;
}
bool
t9()
{
CHECK_EQ_OR_RETURN(o2, -2);
o2 = -20;
return true;
}
// For test 10 the main function calls f10b(f10a()), then calls t10().
int*
f10a()
{
return &o3;
}
void
f10b(int* p)
{
*p = -30;
}
bool
t10()
{
CHECK_EQ_OR_RETURN(o3, -30);
return true;
}
bool
t12()
{
struct int128 newval = { 335, 345 };
CHECK_EQ_OR_RETURN((int) v12.hi, 115);
CHECK_EQ_OR_RETURN((int) v12.lo, 125);
v12 = newval;
return true;
}
bool
t_last()
{
CHECK_EQ_OR_RETURN(v1, 10);
CHECK_EQ_OR_RETURN(v2, 20);
CHECK_EQ_OR_RETURN(v3, 30);
CHECK_EQ_OR_RETURN(v4, 40);
CHECK_EQ_OR_RETURN(v5, 50);
CHECK_EQ_OR_RETURN(v6, 60);
CHECK_EQ_OR_RETURN((int) v12.hi, 335);
CHECK_EQ_OR_RETURN((int) v12.lo, 345);
CHECK_EQ_OR_RETURN(o1, -10);
CHECK_EQ_OR_RETURN(o2, -20);
CHECK_EQ_OR_RETURN(o3, -30);
int check = t11_last();
CHECK_EQ_OR_RETURN(check, 1);
return true;
}
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