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|
// RUN: %target-run-simple-swiftgyb
// REQUIRES: executable_test
import StdlibUnittest
import SwiftShims
var TemporaryAllocationTestSuite = TestSuite("TemporaryAllocation")
func isStackAllocated(_ pointer: UnsafeRawPointer) -> Bool? {
var stackBegin: UInt = 0
var stackEnd: UInt = 0
if _swift_stdlib_getCurrentStackBounds(&stackBegin, &stackEnd) {
var pointerValue = UInt(bitPattern: pointer)
return pointerValue >= stackBegin && pointerValue < stackEnd
}
return nil
}
func expectStackAllocated(_ pointer: UnsafeRawPointer) {
if let stackAllocated = isStackAllocated(pointer) {
expectTrue(stackAllocated)
} else {
// Could not read stack bounds. Skip.
}
}
func expectNotStackAllocated(_ pointer: UnsafeRawPointer) {
if let stackAllocated = isStackAllocated(pointer) {
expectFalse(stackAllocated)
} else {
// Could not read stack bounds. Skip.
}
}
// MARK: Untyped buffers
TemporaryAllocationTestSuite.test("untypedAllocationOnStack") {
withUnsafeTemporaryAllocation(byteCount: 8, alignment: 1) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("untypedAllocationOnHeap") {
// EXPECTATION: a very large allocated buffer is heap-allocated. (Note if
// swift_stdlib_isStackAllocationSafe() gets fleshed out, this test may need
// to be changed.)
withUnsafeTemporaryAllocation(byteCount: 100_000, alignment: 1) { buffer in
expectNotStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("unprotectedUntypedAllocationOnStack") {
_withUnprotectedUnsafeTemporaryAllocation(byteCount: 8, alignment: 1) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("unprotectedUntypedAllocationOnHeap") {
// EXPECTATION: a very large allocated buffer is heap-allocated. (Note if
// swift_stdlib_isStackAllocationSafe() gets fleshed out, this test may need
// to be changed.)
_withUnprotectedUnsafeTemporaryAllocation(byteCount: 100_000, alignment: 1) { buffer in
expectNotStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("untypedEmptyAllocationIsStackAllocated") {
withUnsafeTemporaryAllocation(byteCount: 0, alignment: 1) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
#if !os(WASI)
TemporaryAllocationTestSuite.test("crashOnNegativeByteCount") {
expectCrash {
let byteCount = Int.random(in: -2 ..< -1)
withUnsafeTemporaryAllocation(byteCount: byteCount, alignment: 1) { _ in }
}
}
TemporaryAllocationTestSuite.test("crashOnNegativeAlignment") {
expectCrash {
let alignment = Int.random(in: -2 ..< -1)
withUnsafeTemporaryAllocation(byteCount: 16, alignment: alignment) { _ in }
}
}
#endif
TemporaryAllocationTestSuite.test("untypedAllocationIsAligned") {
withUnsafeTemporaryAllocation(byteCount: 1, alignment: 8) { buffer in
let pointerBits = Int(bitPattern: buffer.baseAddress!)
let alignmentMask = 0b111
expectEqual(pointerBits & alignmentMask, 0)
}
}
// MARK: Typed buffers
TemporaryAllocationTestSuite.test("typedAllocationOnStack") {
withUnsafeTemporaryAllocation(of: Int.self, capacity: 1) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("typedAllocationOnHeap") {
// EXPECTATION: a very large allocated buffer is heap-allocated. (Note if
// swift_stdlib_isStackAllocationSafe() gets fleshed out, this test may need
// to be changed.)
withUnsafeTemporaryAllocation(of: Int.self, capacity: 100_000) { buffer in
expectNotStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("unprotectedTypedAllocationOnStack") {
_withUnprotectedUnsafeTemporaryAllocation(of: Int.self, capacity: 1) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("unprotectedTypedAllocationOnHeap") {
// EXPECTATION: a very large allocated buffer is heap-allocated. (Note if
// swift_stdlib_isStackAllocationSafe() gets fleshed out, this test may need
// to be changed.)
_withUnprotectedUnsafeTemporaryAllocation(of: Int.self, capacity: 100_000) { buffer in
expectNotStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("typedEmptyAllocationIsStackAllocated") {
withUnsafeTemporaryAllocation(of: Int.self, capacity: 0) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
TemporaryAllocationTestSuite.test("voidAllocationIsStackAllocated") {
withUnsafeTemporaryAllocation(of: Void.self, capacity: 1) { buffer in
expectStackAllocated(buffer.baseAddress!)
}
}
#if !os(WASI)
TemporaryAllocationTestSuite.test("crashOnNegativeValueCount") {
expectCrash {
let capacity = Int.random(in: -2 ..< -1)
withUnsafeTemporaryAllocation(of: Int.self, capacity: capacity) { _ in }
}
}
#endif
TemporaryAllocationTestSuite.test("typedAllocationIsAligned") {
withUnsafeTemporaryAllocation(of: Int.self, capacity: 1) { buffer in
let pointerBits = Int(bitPattern: buffer.baseAddress!)
let alignmentMask = MemoryLayout<Int>.alignment - 1
expectEqual(pointerBits & alignmentMask, 0)
}
}
runAllTests()
|
