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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stddef.h>
#include <stdint.h>
#include <limits>
#include <memory>
#include "build/rust/tests/test_rust_static_library/src/lib.rs.h"
#include "partition_alloc/buildflags.h"
#include "testing/gtest/include/gtest/gtest.h"
#if PA_BUILDFLAG(USE_PARTITION_ALLOC)
#if PA_BUILDFLAG(HAS_64_BIT_POINTERS)
#include "partition_alloc/partition_address_space.h" // nogncheck
#else
#include "partition_alloc/address_pool_manager_bitmap.h" // nogncheck
#endif
#endif
TEST(RustStaticTest, CppCallingIntoRust_BasicFFI) {
EXPECT_EQ(7, add_two_ints_via_rust(3, 4));
}
#if PA_BUILDFLAG(USE_PARTITION_ALLOC)
TEST(RustStaticTest, RustComponentUsesPartitionAlloc) {
// Verify that PartitionAlloc is consistently used in C++ and Rust.
auto cpp_allocated_int = std::make_unique<int>();
SomeStruct* rust_allocated_ptr = allocate_via_rust().into_raw();
EXPECT_EQ(partition_alloc::IsManagedByPartitionAlloc(
reinterpret_cast<uintptr_t>(rust_allocated_ptr)),
partition_alloc::IsManagedByPartitionAlloc(
reinterpret_cast<uintptr_t>(cpp_allocated_int.get())));
rust::Box<SomeStruct>::from_raw(rust_allocated_ptr);
}
#endif // PA_BUILDFLAG(USE_PARTITION_ALLOC)
TEST(RustStaticTest, AllocAligned) {
alloc_aligned();
}
TEST(RustStaticTest, RustLargeAllocationFailure) {
// A small allocation that should always succeed. If allocation succeeds, we
// get true back.
EXPECT_TRUE(allocate_huge_via_rust(100u, 1u));
#if PA_BUILDFLAG(USE_PARTITION_ALLOC_AS_MALLOC)
// We only do these tests when using PA, as the system allocator will not fail
// on large allocations (unless it is really OOM).
// PartitionAlloc currently limits all allocations to no more than i32::MAX
// elements, so the allocation will fail. If done through normal malloc(),
// PA will crash when an allocation fails rather than return null, but Rust
// can be trusted to handle failure without introducing null derefs so this
// should fail gracefully.
size_t max_size = partition_alloc::internal::MaxDirectMapped();
EXPECT_FALSE(allocate_huge_via_rust(max_size + 1u, 4u));
// Same as above but with an alignment larger than PartitionAlloc's default
// alignment, which goes down a different path.
size_t big_alignment = alignof(std::max_align_t) * 2u;
EXPECT_FALSE(allocate_huge_via_rust(max_size + 1u, big_alignment));
// PartitionAlloc will crash if given an alignment larger than this. The
// allocation hooks handle it gracefully.
size_t max_alignment = partition_alloc::internal::kMaxSupportedAlignment;
EXPECT_FALSE(allocate_huge_via_rust(100u, max_alignment * 2u));
// Repeat the test but with alloc_zeroed().
EXPECT_TRUE(allocate_zeroed_huge_via_rust(100u, 1u));
EXPECT_FALSE(allocate_zeroed_huge_via_rust(max_size + 1u, 4u));
EXPECT_FALSE(allocate_zeroed_huge_via_rust(max_size + 1u, big_alignment));
EXPECT_FALSE(allocate_zeroed_huge_via_rust(100u, max_alignment * 2u));
// Repeat the test but with realloc().
EXPECT_TRUE(reallocate_huge_via_rust(100u, 1u));
EXPECT_FALSE(reallocate_huge_via_rust(max_size + 1u, 4u));
EXPECT_FALSE(reallocate_huge_via_rust(max_size + 1u, big_alignment));
// Note: We don't test with `max_alignment * 2` since the initial allocation
// will always fail, the realloc can't happen anyway.
#endif
}
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