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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: libcpp-has-no-threads
// <thread>
// class thread
// template <class F, class ...Args> thread(F&& f, Args&&... args);
// UNSUPPORTED: sanitizer-new-delete
#include <thread>
#include <new>
#include <atomic>
#include <cstdlib>
#include <cassert>
#include "test_macros.h"
std::atomic<unsigned> throw_one(0xFFFF);
std::atomic<unsigned> outstanding_new(0);
void* operator new(std::size_t s) TEST_THROW_SPEC(std::bad_alloc)
{
if (throw_one == 0)
TEST_THROW(std::bad_alloc());
--throw_one;
++outstanding_new;
void* ret = std::malloc(s);
if (!ret) std::abort(); // placate MSVC's unchecked malloc warning
return ret;
}
void operator delete(void* p) TEST_NOEXCEPT
{
--outstanding_new;
std::free(p);
}
bool f_run = false;
void f()
{
f_run = true;
}
class G
{
int alive_;
public:
static int n_alive;
static bool op_run;
G() : alive_(1) {++n_alive;}
G(const G& g) : alive_(g.alive_) {++n_alive;}
~G() {alive_ = 0; --n_alive;}
void operator()()
{
assert(alive_ == 1);
assert(n_alive >= 1);
op_run = true;
}
void operator()(int i, double j)
{
assert(alive_ == 1);
assert(n_alive >= 1);
assert(i == 5);
assert(j == 5.5);
op_run = true;
}
};
int G::n_alive = 0;
bool G::op_run = false;
#if TEST_STD_VER >= 11
class MoveOnly
{
MoveOnly(const MoveOnly&);
public:
MoveOnly() {}
MoveOnly(MoveOnly&&) {}
void operator()(MoveOnly&&)
{
}
};
#endif
// Test throwing std::bad_alloc
//-----------------------------
// Concerns:
// A Each allocation performed during thread construction should be performed
// in the parent thread so that std::terminate is not called if
// std::bad_alloc is thrown by new.
// B std::threads constructor should properly handle exceptions and not leak
// memory.
// Plan:
// 1 Create a thread and count the number of allocations, 'N', it performs.
// 2 For each allocation performed run a test where that allocation throws.
// 2.1 check that the exception can be caught in the parent thread.
// 2.2 Check that the functor has not been called.
// 2.3 Check that no memory allocated by the creation of the thread is leaked.
// 3 Finally check that a thread runs successfully if we throw after 'N+1'
// allocations.
void test_throwing_new_during_thread_creation() {
#ifndef TEST_HAS_NO_EXCEPTIONS
throw_one = 0xFFF;
{
std::thread t(f);
t.join();
}
const int numAllocs = 0xFFF - throw_one;
// i <= numAllocs means the last iteration is expected not to throw.
for (int i=0; i <= numAllocs; ++i) {
throw_one = i;
f_run = false;
unsigned old_outstanding = outstanding_new;
try {
std::thread t(f);
assert(i == numAllocs); // Only final iteration will not throw.
t.join();
assert(f_run);
} catch (std::bad_alloc const&) {
assert(i < numAllocs);
assert(!f_run); // (2.2)
}
assert(old_outstanding == outstanding_new); // (2.3)
}
f_run = false;
throw_one = 0xFFF;
#endif
}
int main()
{
test_throwing_new_during_thread_creation();
{
std::thread t(f);
t.join();
assert(f_run == true);
}
{
assert(G::n_alive == 0);
assert(!G::op_run);
std::thread t((G()));
t.join();
assert(G::n_alive == 0);
assert(G::op_run);
}
G::op_run = false;
#ifndef TEST_HAS_NO_EXCEPTIONS
{
try
{
throw_one = 0;
assert(G::n_alive == 0);
assert(!G::op_run);
std::thread t((G()));
assert(false);
}
catch (...)
{
throw_one = 0xFFFF;
assert(G::n_alive == 0);
assert(!G::op_run);
}
}
#endif
#if TEST_STD_VER >= 11
{
assert(G::n_alive == 0);
assert(!G::op_run);
std::thread t(G(), 5, 5.5);
t.join();
assert(G::n_alive == 0);
assert(G::op_run);
}
{
std::thread t = std::thread(MoveOnly(), MoveOnly());
t.join();
}
#endif
}
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