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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
/*
* Test sending and receiving Shmem values.
*/
#include "gtest/gtest.h"
#include "mozilla/_ipdltest/IPDLUnitTest.h"
#include "mozilla/_ipdltest/PTestShmemChild.h"
#include "mozilla/_ipdltest/PTestShmemParent.h"
using namespace mozilla::ipc;
namespace mozilla::_ipdltest {
class TestShmemParent : public PTestShmemParent {
NS_INLINE_DECL_REFCOUNTING(TestShmemParent, override)
private:
IPCResult RecvTake(Shmem&& mem, Shmem&& unsafe,
const uint32_t& expectedSize) final override {
EXPECT_EQ(mem.Size<char>(), expectedSize)
<< "expected shmem size " << expectedSize << ", but it has size "
<< mem.Size<char>();
EXPECT_EQ(unsafe.Size<char>(), expectedSize)
<< "expected shmem size " << expectedSize << ", but it has size "
<< unsafe.Size<char>();
EXPECT_FALSE(strcmp(mem.get<char>(), "And yourself!"))
<< "expected message was not written";
EXPECT_FALSE(strcmp(unsafe.get<char>(), "And yourself!"))
<< "expected message was not written";
EXPECT_TRUE(DeallocShmem(mem));
EXPECT_TRUE(DeallocShmem(unsafe));
Close();
return IPC_OK();
}
~TestShmemParent() = default;
};
class TestShmemChild : public PTestShmemChild {
NS_INLINE_DECL_REFCOUNTING(TestShmemChild, override)
private:
IPCResult RecvGive(Shmem&& mem, Shmem&& unsafe,
const uint32_t& expectedSize) final override {
EXPECT_EQ(mem.Size<char>(), expectedSize)
<< "expected shmem size " << expectedSize << ", but it has size "
<< mem.Size<char>();
EXPECT_EQ(unsafe.Size<char>(), expectedSize)
<< "expected shmem size " << expectedSize << ", but it has size "
<< unsafe.Size<char>();
EXPECT_FALSE(strcmp(mem.get<char>(), "Hello!"))
<< "expected message was not written";
EXPECT_FALSE(strcmp(unsafe.get<char>(), "Hello!"))
<< "expected message was not written";
char* unsafeptr = unsafe.get<char>();
memcpy(mem.get<char>(), "And yourself!", sizeof("And yourself!"));
memcpy(unsafeptr, "And yourself!", sizeof("And yourself!"));
Shmem unsafecopy = unsafe;
EXPECT_TRUE(SendTake(std::move(mem), std::move(unsafe), expectedSize));
// these checks also shouldn't fail in the child
char uc1 = *unsafeptr;
(void)uc1;
char uc2 = *unsafecopy.get<char>();
(void)uc2;
return IPC_OK();
}
~TestShmemChild() = default;
};
IPDL_TEST(TestShmem) {
Shmem mem;
Shmem unsafe;
uint32_t size = 12345;
EXPECT_TRUE(mActor->AllocShmem(size, &mem)) << "can't alloc shmem";
EXPECT_TRUE(mActor->AllocUnsafeShmem(size, &unsafe)) << "can't alloc shmem";
EXPECT_EQ(mem.Size<char>(), size) << "shmem is wrong size: expected " << size
<< ", got " << mem.Size<char>();
EXPECT_EQ(unsafe.Size<char>(), size)
<< "shmem is wrong size: expected " << size << ", got "
<< unsafe.Size<char>();
char* ptr = mem.get<char>();
memcpy(ptr, "Hello!", sizeof("Hello!"));
char* unsafeptr = unsafe.get<char>();
memcpy(unsafeptr, "Hello!", sizeof("Hello!"));
Shmem unsafecopy = unsafe;
EXPECT_TRUE(mActor->SendGive(std::move(mem), std::move(unsafe), size));
// uncomment the following line for a (nondeterministic) surprise!
// char c1 = *ptr; (void)c1;
// uncomment the following line for a deterministic surprise!
// char c2 = *mem.get<char>(); (void)c2;
// unsafe shmem gets rid of those checks
char uc1 = *unsafeptr;
(void)uc1;
char uc2 = *unsafecopy.get<char>();
(void)uc2;
}
} // namespace mozilla::_ipdltest