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Bug 1652081 - Verify that newly allocated shared memory is zeroed. r=mccr8

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Differential Revision: https://phabricator.services.mozilla.com/D83144
This commit is contained in:
Jed Davis 2020-07-10 22:08:07 +00:00
parent 910be54a2d
commit ba9cf29223
1 changed files with 32 additions and 0 deletions
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32
ipc/gtest/TestSharedMemory.cpp
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@ -9,7 +9,9 @@
#include "base/shared_memory.h"
#include "base/process_util.h"
#include "mozilla/RefPtr.h"
#include "mozilla/ipc/SharedMemory.h"
#include "mozilla/ipc/SharedMemoryBasic.h"
#ifdef XP_WIN
# include <windows.h>
@ -261,4 +263,34 @@ TEST(IPCSharedMemory, ROCopyAndReprotect)
memRO, 1, ipc::SharedMemory::RightsReadWrite));
}
TEST(IPCSharedMemory, IsZero)
{
base::SharedMemory shm;
static constexpr size_t kSize = 65536;
ASSERT_TRUE(shm.Create(kSize));
ASSERT_TRUE(shm.Map(kSize));
auto* mem = reinterpret_cast<char*>(shm.memory());
for (size_t i = 0; i < kSize; ++i) {
ASSERT_EQ(mem[i], 0) << "offset " << i;
}
}
#ifndef FUZZING
TEST(IPCSharedMemory, BasicIsZero)
{
auto shm = MakeRefPtr<ipc::SharedMemoryBasic>();
static constexpr size_t kSize = 65536;
ASSERT_TRUE(shm->Create(kSize));
ASSERT_TRUE(shm->Map(kSize));
auto* mem = reinterpret_cast<char*>(shm->memory());
for (size_t i = 0; i < kSize; ++i) {
ASSERT_EQ(mem[i], 0) << "offset " << i;
}
}
#endif
} // namespace mozilla