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snapshot before regression test

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2026-07-18 19:25:40 +08:00
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Test/PointerTest/App/main.py Normal file
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from stdint import *
import t, c
import stdio
import string
import w32.win32console
import w32.win32memory
import testcheck
# ============================================================
# PointerTest - 测试指针操作、global声明、数组退化、指针算术
# ============================================================
# --- Test 1: global 声明对模块级变量的影响 ---
_g_val: t.CInt = 0
_g_ptr: t.CUInt32T | t.CPtr = None
def test_global_write():
"""测试：缺少 global 声明时，赋值是否修改模块级变量"""
global _g_val
_g_val = 42
def test_global_write_no_decl():
"""测试：没有 global 声明时，赋值是否创建局部变量"""
# 注意：这里故意不声明 global，测试编译器行为
# 如果 _g_val 在此函数之前被读取过，赋值会修改全局变量
# 如果 _g_val 在此函数中首次被赋值，会创建局部变量
_g_val = 99 # 这应该创建一个局部变量
def test_global_ptr():
global _g_ptr
buf: t.CUInt32T | t.CPtr = w32.win32memory.VirtualAlloc(None, 256, 0x3000, 0x04)
if buf:
string.memset(buf, 0, 256)
_g_ptr = buf
p: t.CUInt32T | t.CPtr = _g_ptr
p[0] = 0xAABBCCDD
p[1] = 0x11223344
def test_global_ptr_no_decl():
"""测试：没有 global 声明时，指针赋值是否创建局部变量"""
# _g_ptr 在 test_global_ptr 中已被赋值（有 global）
# 这里读取 _g_ptr 然后赋值 — 读取会将全局变量加入 Gen.variables
# 所以后续赋值应该修改全局变量
old: t.CUInt32T | t.CPtr = _g_ptr # 读取 -> 加入 Gen.variables
_g_ptr = None # 因为之前读取过，这应该修改全局变量
# --- Test 2: 指针算术和数组索引 ---
def test_pointer_arithmetic():
"""测试指针算术：偏移计算是否正确"""
buf: t.CUInt32T | t.CPtr = w32.win32memory.VirtualAlloc(None, 256, 0x3000, 0x04)
if not buf:
testcheck.fail("pointer arithmetic: VirtualAlloc returned NULL")
return
string.memset(buf, 0, 256)
# 写入值
for i in range(8):
buf[i] = t.CUInt32T(i * 100)
# 读取并验证
ok: t.CInt = 1
for i in range(8):
v: t.CUInt32T = buf[i]
expected: t.CUInt32T = t.CUInt32T(i * 100)
if v != expected:
stdio.printf("buf[%d] = 0x%x, expected 0x%x\n", i, v, expected)
ok = 0
testcheck.check(ok, "pointer arithmetic (buf[i] = i*100)", "pointer arithmetic mismatch")
# --- Test 3: 数组退化为指针 ---
def test_array_decay():
"""测试 list[t.CChar, N] 传递给 t.CConst | str 参数"""
arr: t.CArray[t.CChar, 32]
string.memset(c.Addr(arr), 0, 32)
# 手动写入字符串
src: str = "Hello"
for i in range(5):
arr[i] = t.CChar(ord(src[i]))
arr[5] = 0
# 传递给 print (接受 t.CConst | str)
stdio.printf("array decay -> %s\n", c.Addr(arr))
testcheck.ok("array decay (Hello)")
# --- Test 4: 指针类型转换 (CVoid/CPtr) ---
def test_pointer_cast():
"""测试指针与整数之间的类型转换"""
buf: t.CUInt32T | t.CPtr = w32.win32memory.VirtualAlloc(None, 256, 0x3000, 0x04)
if not buf:
testcheck.fail("pointer cast: VirtualAlloc returned NULL")
return
string.memset(buf, 0, 256)
# 通过 CVoid 指针写入
raw: t.CVoid | t.CPtr = t.CVoid(t.CUInt64T(buf), t.CPtr)
# 将 CVoid 指针转回 CUInt32T 指针
p32: t.CUInt32T | t.CPtr = (t.CUInt32T | t.CPtr)(raw)
p32[0] = 0xDEADBEEF
# 通过原始指针读取
if buf[0] == 0xDEADBEEF:
testcheck.ok("pointer cast CVoid -> CUInt32T*")
else:
stdio.printf("got 0x%x\n", buf[0])
testcheck.fail("pointer cast failed")
# --- Test 5: 指针偏移计算 (byte offset vs element offset) ---
def test_pointer_offset():
"""测试指针偏移：CUInt8T* + N 应该偏移 N 字节，CUInt32T* + N 应该偏移 N*4 字节"""
buf: t.CUInt8T | t.CPtr = w32.win32memory.VirtualAlloc(None, 256, 0x3000, 0x04)
if not buf:
testcheck.fail("pointer offset: VirtualAlloc returned NULL")
return
string.memset(buf, 0, 256)
# 写入 4 字节
buf[0] = 0x41 # 'A'
buf[1] = 0x42 # 'B'
buf[2] = 0x43 # 'C'
buf[3] = 0x44 # 'D'
# 通过 CUInt32T* 读取（应该读到 0x44434241 on little-endian）
p32: t.CUInt32T | t.CPtr = (t.CUInt32T | t.CPtr)(t.CVoid(t.CUInt64T(buf), t.CPtr))
val: t.CUInt32T = p32[0]
# little-endian: 0x44434241
if val == 0x44434241:
testcheck.ok("byte offset vs element offset (0x44434241)")
else:
stdio.printf("expected 0x44434241, got 0x%x\n", val)
testcheck.fail("byte offset vs element offset")
# --- Test 6: 结构体指针访问 ---
class TestStruct():
a: t.CInt
b: t.CInt
c: t.CUInt64T
def test_struct_pointer():
"""测试结构体指针的成员访问"""
s: TestStruct
s.a = 10
s.b = 20
s.c = 0x123456789ABCDEF0
p: TestStruct | t.CPtr = c.Addr(s)
stdio.printf("struct pointer access (a=%d b=%d c=0x%llx)\n", p.a, p.b, p.c)
testcheck.check(p.a == 10 and p.b == 20 and p.c == 0x123456789ABCDEF0, "struct pointer access", "struct pointer access mismatch")
# --- Test 7: memcpy/memset 通过指针 ---
def test_memcpy_pointers():
"""测试 memcpy 在指针之间的数据复制"""
src_buf: t.CUInt32T | t.CPtr = w32.win32memory.VirtualAlloc(None, 64, 0x3000, 0x04)
dst_buf: t.CUInt32T | t.CPtr = w32.win32memory.VirtualAlloc(None, 64, 0x3000, 0x04)
if not src_buf or not dst_buf:
testcheck.fail("memcpy: VirtualAlloc returned NULL")
return
# 初始化 src
for i in range(8):
src_buf[i] = t.CUInt32T(i + 1000)
# 复制
string.memcpy(t.CVoid(t.CUInt64T(dst_buf), t.CPtr), t.CVoid(t.CUInt64T(src_buf), t.CPtr), 32)
# 验证
ok: t.CInt = 1
for i in range(8):
if dst_buf[i] != t.CUInt32T(i + 1000):
stdio.printf("dst[%d] = %u, expected %u\n", i, dst_buf[i], i + 1000)
ok = 0
testcheck.check(ok, "memcpy between pointers", "memcpy between pointers failed")
# --- Test 8: 指针作为函数参数 ---
def fill_array(arr: t.CUInt32T | t.CPtr, count: t.CInt, val: t.CUInt32T):
for i in range(count):
arr[i] = val
def test_pointer_param():
"""测试指针作为函数参数传递"""
buf: t.CUInt32T | t.CPtr = w32.win32memory.VirtualAlloc(None, 64, 0x3000, 0x04)
if not buf:
testcheck.fail("pointer param: VirtualAlloc returned NULL")
return
fill_array(buf, 8, 0xCAFEBABE)
ok: t.CInt = 1
for i in range(8):
if buf[i] != 0xCAFEBABE:
ok = 0
testcheck.check(ok, "pointer as function parameter", "pointer as function parameter failed")
def main() -> t.CInt | t.CExport:
w32.win32console.SetConsoleCP(65001)
w32.win32console.SetConsoleOutputCP(65001)
print("你好")
l: t.CArray[t.CChar, 2] = 0
for i in "hello":
l[0] = i
print(l)
u: t.CArray[t.CUInt64T | t.BigEndian, 2] = [0x4141414141414141, 0x0000000000000000]
for i in c.Addr(u):
# l[0] = i
stdio.printf("0x%llx\n", i)
k: t.CArray[t.CChar, 12] = ['1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C']
for i in k:
stdio.printf("%c\n", i)
testcheck.begin("PointerTest: 指针操作基准测试")
# Test 1: global 声明
testcheck.section("Test 1: global declaration")
_g_val = 0
test_global_write()
stdio.printf("After test_global_write(): _g_val = %d (expect 42)\n", _g_val)
test_global_write_no_decl()
stdio.printf("After test_global_write_no_decl(): _g_val = %d (expect 42, not 99)\n", _g_val)
testcheck.check(_g_val == 42, "global declaration (_g_val = 42)", "global declaration failed")
# Test 1b: global pointer
testcheck.section("Test 1b: global pointer")
test_global_ptr()
if _g_ptr:
p: t.CUInt32T | t.CPtr = _g_ptr
stdio.printf("_g_ptr[0] = 0x%x (expect 0xAABBCCDD)\n", p[0])
stdio.printf("_g_ptr[1] = 0x%x (expect 0x11223344)\n", p[1])
testcheck.check(p[0] == 0xAABBCCDD and p[1] == 0x11223344, "global pointer values", "global pointer mismatch")
test_global_ptr_no_decl()
stdio.printf("After test_global_ptr_no_decl(): _g_ptr = %p (expect NULL/0)\n", t.CVoid(t.CUInt64T(_g_ptr), t.CPtr))
testcheck.ok("global ptr no decl (set to NULL)")
# Test 2: pointer arithmetic
testcheck.section("Test 2: pointer arithmetic")
test_pointer_arithmetic()
# Test 3: array decay
testcheck.section("Test 3: array decay")
test_array_decay()
# Test 4: pointer cast
testcheck.section("Test 4: pointer cast")
test_pointer_cast()
# Test 5: pointer offset
testcheck.section("Test 5: pointer offset (byte vs element)")
test_pointer_offset()
# Test 6: struct pointer
testcheck.section("Test 6: struct pointer access")
test_struct_pointer()
# Test 7: memcpy pointers
testcheck.section("Test 7: memcpy between pointers")
test_memcpy_pointers()
# Test 8: pointer as param
testcheck.section("Test 8: pointer as function parameter")
test_pointer_param()
return testcheck.end()