增加测试用例框架及测试用例

.github/copilot-instructions.md

@@ -0,0 +1,137 @@
+# Copilot Instructions for mlibc Project
+
+## Project Overview / 项目概述
+
+**English:**
+mlibc is a lightweight C library specifically designed for deeply embedded systems. The project focuses on implementing POSIX.1-2001 (PSE51) and related ANSI C APIs to provide essential system functionality for resource-constrained embedded environments. This library aims to offer a minimal yet complete implementation of standard C library functions while maintaining compatibility with various embedded architectures including RISC-V, ARM, and AArch64.
+
+Key features:
+- PSE51 (POSIX.1-2001) compliance
+- ANSI C standard library implementation
+- Multi-architecture support (RISC-V32/64, ARM, AArch64)
+- Minimal memory footprint
+- Embedded-first design philosophy
+
+**中文:**
+mlibc 是一个专门为深度嵌入式系统设计的轻量级 C 库。该项目专注于实现 POSIX.1-2001 (PSE51) 和相关的 ANSI C API，为资源受限的嵌入式环境提供基础系统功能。本库旨在提供标准 C 库函数的最小化但完整的实现，同时保持与多种嵌入式架构（包括 RISC-V、ARM 和 AArch64）的兼容性。
+
+主要特性：
+- 符合 PSE51 (POSIX.1-2001) 标准
+- ANSI C 标准库实现
+- 多架构支持 (RISC-V32/64, ARM, AArch64)
+- 最小内存占用
+- 嵌入式优先的设计理念
+
+## Code Review Instructions / 代码审查指南
+
+### Review Language / 审查语言
+When performing code reviews, respond in Chinese and English.
+进行代码审查时，请使用中英文双语回复。
+
+### Review Focus Areas / 审查重点
+
+**English:**
+1. **Memory Safety**: Pay special attention to buffer overflows, memory leaks, and pointer safety
+2. **Embedded Constraints**: Consider memory usage, stack usage, and performance implications
+3. **Standard Compliance**: Ensure compliance with PSE51 and ANSI C standards
+4. **Architecture Portability**: Verify code works across supported architectures
+5. **Error Handling**: Check for proper error handling and edge cases
+6. **Documentation**: Ensure code is well-documented for embedded developers
+
+**中文:**
+1. **内存安全**: 特别关注缓冲区溢出、内存泄漏和指针安全性
+2. **嵌入式约束**: 考虑内存使用、栈使用和性能影响
+3. **标准合规性**: 确保符合 PSE51 和 ANSI C 标准
+4. **架构可移植性**: 验证代码在支持的架构间正常工作
+5. **错误处理**: 检查适当的错误处理和边界情况
+6. **文档说明**: 确保代码有良好的文档供嵌入式开发者使用
+
+### Review Format / 审查格式
+
+Please structure your reviews as follows:
+请按以下格式组织您的审查：
+
+```
+## Code Review / 代码审查
+
+### Summary / 总结
+**English:** [Brief summary of changes and overall assessment]
+**中文:** [变更简要总结和整体评估]
+
+### Issues Found / 发现的问题
+**English:**
+- [Issue 1 description]
+- [Issue 2 description]
+
+**中文:**
+- [问题1描述]
+- [问题2描述]
+
+### Recommendations / 建议
+**English:**
+- [Recommendation 1]
+- [Recommendation 2]
+
+**中文:**
+- [建议1]
+- [建议2]
+
+### Positive Aspects / 积极方面
+**English:**
+- [Good practice 1]
+- [Good practice 2]
+
+**中文:**
+- [良好实践1]
+- [良好实践2]
+```
+
+### Specific Considerations for mlibc / mlibc 特定考虑事项
+
+**English:**
+- **PSE51 Compatibility**: Verify function signatures and behavior match PSE51 specifications
+- **Minimal Dependencies**: Avoid introducing unnecessary dependencies
+- **Cross-platform Build**: Consider SCons build system compatibility
+- **Test Coverage**: Ensure adequate test coverage in testcases/ directory
+- **Performance**: Optimize for embedded environments with limited resources
+
+**中文:**
+- **PSE51 兼容性**: 验证函数签名和行为符合 PSE51 规范
+- **最小依赖**: 避免引入不必要的依赖
+- **跨平台构建**: 考虑 SCons 构建系统兼容性
+- **测试覆盖**: 确保 testcases/ 目录中有充分的测试覆盖
+- **性能优化**: 针对资源有限的嵌入式环境进行优化
+
+### Common Patterns to Look For / 需要关注的常见模式
+
+**English:**
+- Use of `__attribute__` for compiler-specific optimizations
+- Proper errno handling according to POSIX standards
+- Thread-safe implementations where required
+- Minimal stack usage in recursive functions
+- Proper header guard usage
+
+**中文:**
+- 使用 `__attribute__` 进行编译器特定优化
+- 按照 POSIX 标准正确处理 errno
+- 在需要时实现线程安全
+- 递归函数中的最小栈使用
+- 正确使用头文件保护
+
+### Quality Gates / 质量门槛
+
+**English:**
+All code contributions should meet these criteria:
+- Compiles without warnings on all supported architectures
+- Passes existing test cases
+- Includes appropriate test coverage for new functionality
+- Maintains or improves performance benchmarks
+- Follows project coding style
+
+**中文:**
+所有代码贡献都应满足以下标准：
+- 在所有支持的架构上无警告编译
+- 通过现有测试用例
+- 为新功能包含适当的测试覆盖
+- 维持或改善性能基准
+- 遵循项目编码风格

.gitignore

@@ -1,5 +1,8 @@
 # Build files
 build/
+build.log
+test_results
+
 toolchain/arm-linux-eabi_for_x86_64-pc-linux-gnu
 toolchain/riscv64-unkwown-elf_for_x86_64-pc-linux-gnu
 toolchain/binutils-*

Makefile

@@ -4,6 +4,11 @@ endif
 
 PROJECT_PATH := .
 
+# Set default toolchain if MLIBC_TOOLCHAIN is not set
+ifeq ($(MLIBC_TOOLCHAIN),)
+    MLIBC_TOOLCHAIN := $(PROJECT_PATH)/toolchain/arm-linux-eabi_for_x86_64-pc-linux-gnu/bin/arm-linux-eabi-
+endif
+
 CC := $(MLIBC_TOOLCHAIN)gcc
 AR := $(MLIBC_TOOLCHAIN)ar
 

testcases/Makefile

@@ -0,0 +1,226 @@
+# Master Makefile for mlibc PSE51 Test Suite
+# Supports both PC and embedded test environments
+
+# Test directories
+TEST_DIRS := assert ctype fcntl locale signal stat stdio stdlib string time unistd utsname
+
+# Colors for output
+RED := \033[0;31m
+GREEN := \033[0;32m
+YELLOW := \033[1;33m
+BLUE := \033[0;34m
+NC := \033[0m
+
+# Default target
+.PHONY: all
+all: help
+
+# Help message
+.PHONY: help
+help:
+	@echo "$(BLUE)=== mlibc PSE51 Test Suite ===$(NC)"
+	@echo ""
+	@echo "$(YELLOW)PC Environment Tests:$(NC)"
+	@echo "  make pc-build      - Build all PC tests"
+	@echo "  make pc-test       - Run all PC tests"
+	@echo "  make pc-clean      - Clean PC test builds"
+	@echo ""
+	@echo "$(YELLOW)Embedded Environment Tests:$(NC)"
+	@echo "  make embedded-build - Build all embedded tests"
+	@echo "  make embedded-test  - Run all embedded tests in QEMU"
+	@echo "  make embedded-clean - Clean embedded test builds"
+	@echo ""
+	@echo "$(YELLOW)Combined Commands:$(NC)"
+	@echo "  make build-all     - Build both PC and embedded tests"
+	@echo "  make test-all      - Run both PC and embedded tests"
+	@echo "  make clean-all     - Clean all builds"
+	@echo ""
+	@echo "$(YELLOW)Quick Commands:$(NC)"
+	@echo "  make test          - Run all PC tests (quick)"
+	@echo "  make embedded      - Build and run embedded tests"
+	@echo ""
+	@echo "$(YELLOW)Individual Tests:$(NC)"
+	@echo "  make pc-test-<dir>      - Run specific PC test (e.g., pc-test-stdio)"
+	@echo "  make embedded-test-<dir> - Run specific embedded test"
+
+# PC Environment Targets
+.PHONY: pc-build
+pc-build:
+	@echo "$(BLUE)Building all PC tests...$(NC)"
+	@for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile ]; then \
+			echo "$(YELLOW)Building $$dir...$(NC)"; \
+			$(MAKE) -C $$dir pc --no-print-directory || exit 1; \
+		fi; \
+	done
+	@echo "$(GREEN)All PC tests built successfully!$(NC)"
+
+.PHONY: pc-test
+pc-test: pc-build
+	@echo "$(BLUE)Running all PC tests...$(NC)"
+	@total=0; passed=0; failed=0; \
+	for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile ]; then \
+			echo "$(YELLOW)\nTesting $$dir...$(NC)"; \
+			if $(MAKE) -C $$dir test --no-print-directory; then \
+				passed=$$((passed + 1)); \
+			else \
+				failed=$$((failed + 1)); \
+				echo "$(RED)$$dir tests failed!$(NC)"; \
+			fi; \
+			total=$$((total + 1)); \
+		fi; \
+	done; \
+	echo "\n$(BLUE)=== PC Test Summary ===$(NC)"; \
+	echo "Total: $$total, Passed: $(GREEN)$$passed$(NC), Failed: $(RED)$$failed$(NC)"
+
+.PHONY: pc-clean
+pc-clean:
+	@echo "$(BLUE)Cleaning PC test builds...$(NC)"
+	@for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile ]; then \
+			$(MAKE) -C $$dir clean --no-print-directory; \
+		fi; \
+	done
+	@echo "$(GREEN)PC tests cleaned!$(NC)"
+
+# Embedded Environment Targets
+.PHONY: embedded-build
+embedded-build: check-mlibc
+	@echo "$(BLUE)Building all embedded tests...$(NC)"
+	@for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile.embedded ]; then \
+			echo "$(YELLOW)Building embedded $$dir...$(NC)"; \
+			$(MAKE) -C $$dir -f Makefile.embedded --no-print-directory || exit 1; \
+		fi; \
+	done
+	@echo "$(GREEN)All embedded tests built successfully!$(NC)"
+
+.PHONY: embedded-test
+embedded-test: embedded-build
+	@echo "$(BLUE)Running embedded tests...$(NC)"
+	@./test
+
+.PHONY: embedded-clean
+embedded-clean:
+	@echo "$(BLUE)Cleaning embedded test builds...$(NC)"
+	@for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile.embedded ]; then \
+			$(MAKE) -C $$dir -f Makefile.embedded clean --no-print-directory; \
+		fi; \
+	done
+	@echo "$(GREEN)Embedded tests cleaned!$(NC)"
+
+# Combined targets
+.PHONY: build-all
+build-all: pc-build embedded-build
+
+.PHONY: test-all
+test-all: pc-test embedded-test
+
+.PHONY: clean-all
+clean-all: pc-clean embedded-clean
+	@rm -f embedded_test_results.log embedded_test_summary.txt
+
+# Quick shortcuts
+.PHONY: test
+test: pc-test
+
+.PHONY: embedded
+embedded: embedded-test
+
+# Individual test targets
+define INDIVIDUAL_TEST_RULES
+.PHONY: pc-test-$(1)
+pc-test-$(1):
+	@echo "$(BLUE)Testing $(1) (PC)...$(NC)"
+	@if [ -f $(1)/Makefile ]; then \
+		$(MAKE) -C $(1) test; \
+	else \
+		echo "$(RED)No PC tests for $(1)$(NC)"; \
+	fi
+
+.PHONY: embedded-test-$(1)
+embedded-test-$(1): check-mlibc
+	@echo "$(BLUE)Testing $(1) (embedded)...$(NC)"
+	@if [ -f $(1)/test ]; then \
+		cd $(1) && ./test; \
+	else \
+		echo "$(RED)No embedded tests for $(1)$(NC)"; \
+	fi
+endef
+
+$(foreach dir,$(TEST_DIRS),$(eval $(call INDIVIDUAL_TEST_RULES,$(dir))))
+
+# Check if mlibc is built
+.PHONY: check-mlibc
+check-mlibc:
+	@ARCH=$${EMBEDDED_ARCH:-riscv32}; \
+	if [ ! -f ../build/$$ARCH/libmlibc.a ]; then \
+		if [ "$$ARCH" = "arm" ]; then \
+			echo "$(YELLOW)Building mlibc for ARM...$(NC)"; \
+		elif [ "$$ARCH" = "aarch64" ]; then \
+			echo "$(YELLOW)Building mlibc for AArch64...$(NC)"; \
+		elif [ "$$ARCH" = "riscv64" ]; then \
+			echo "$(YELLOW)Building mlibc for RISC-V 64-bit...$(NC)"; \
+		else \
+			echo "$(YELLOW)Building mlibc for RISC-V 32-bit...$(NC)"; \
+		fi; \
+		$(MAKE) -C .. ARCH=$$ARCH || { \
+			echo "$(RED)Failed to build mlibc!$(NC)"; \
+			echo "Please ensure you have the $$ARCH toolchain installed."; \
+			echo "Set MLIBC_TOOLCHAIN environment variable if needed."; \
+			exit 1; \
+		}; \
+	fi
+
+# Clean everything including logs
+.PHONY: distclean
+distclean: clean-all
+	@rm -rf */build */test_results
+	@rm -f */*.o */*.log
+	@echo "$(GREEN)All test artifacts removed!$(NC)"
+
+# Show test status
+.PHONY: status
+status:
+	@echo "$(BLUE)=== Test Suite Status ===$(NC)"
+	@echo "\n$(YELLOW)PC Tests:$(NC)"
+	@for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile ]; then \
+			if [ -d $$dir/test_results ]; then \
+				echo "  $$dir: $(GREEN)Built$(NC)"; \
+			else \
+				echo "  $$dir: Not built"; \
+			fi; \
+		fi; \
+	done
+	@echo "\n$(YELLOW)Embedded Tests:$(NC)"
+	@for dir in $(TEST_DIRS); do \
+		if [ -f $$dir/Makefile.embedded ]; then \
+			if [ -d $$dir/build ]; then \
+				echo "  $$dir: $(GREEN)Built$(NC)"; \
+			else \
+				echo "  $$dir: Not built"; \
+			fi; \
+		fi; \
+	done
+
+# Install dependencies (informational)
+.PHONY: deps
+deps:
+	@echo "$(BLUE)=== Dependencies ===$(NC)"
+	@echo ""
+	@echo "$(YELLOW)For PC tests:$(NC)"
+	@echo "  - GCC or compatible C compiler"
+	@echo "  - POSIX-compliant system"
+	@echo ""
+	@echo "$(YELLOW)For embedded tests:$(NC)"
+	@echo "  - RISC-V 32-bit toolchain (riscv32-unknown-elf-gcc)"
+	@echo "  - QEMU system emulator (qemu-system-riscv32)"
+	@echo ""
+	@echo "$(YELLOW)Ubuntu/Debian installation:$(NC)"
+	@echo "  sudo apt-get install gcc-riscv64-unknown-elf qemu-system-misc"
+	@echo ""
+	@echo "$(YELLOW)Environment variables:$(NC)"
+	@echo "  export MLIBC_TOOLCHAIN=riscv32-unknown-elf-"