Paze AI
a3dfe7cb24
1. -g 调试信息 (DWARF5) - config.h 启用 CONFIG_DWARF_VERSION 5 - 生成 .debug_info/.debug_line/.debug_str 等现代调试节 - 函数/变量/行号信息完整 (GDB/VS Code 可调试) 2. 代码优化器验证 - 常量折叠: 2+3 → movl \ (编译期计算) - 死代码消除: if(0) 分支移除 - 不可达代码: i>1000 分支消除 - __OPTIMIZE__ 宏正确设置 3. C23 新特性 (-std=c2x/-std=c23) - __STDC_VERSION__ = 202311L - nullptr 关键字 + nullptr_t 类型 - typeof 泛型 (已有 GNU 扩展) 4. libpcc JIT 演示 (examples/jit_demo.c) - 运行时编译 C 代码字符串 - pcc_set_output_type(MEMORY) JIT 模式 - 调用宿主函数/访问宿主变量 - 验证: jit_run(10) 返回 55 5. VS Code 插件打包 - 修复 package.json 结构 (contributes 嵌套) - 生成 pcc-language-support-0.1.0.vsix (5.9 KB) - 语法高亮 + 构建/运行命令
110 行
2.8 KiB
C
110 行
2.8 KiB
C
/*
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* jit_demo.c - libpcc JIT demonstration
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*
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* Uses libpcc.dll to compile C code at runtime, relocate it
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* to executable memory, and call a JIT-compiled function.
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* This turns PCC into an embedded scripting engine.
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*
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* Build (from bin/):
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* pcc ..\examples\jit_demo.c -I .. -L . -lpcc -o jit_demo.exe
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* (libpcc.dll must be in PATH or same dir)
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*
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* License: MIT
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "libpcc.h"
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/* error/warning printer */
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static void handle_error(void *opaque, const char *msg)
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{
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fprintf(opaque, "%s\n", msg);
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}
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/* a host function callable from JIT-compiled code */
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static int c_host_add(int a, int b)
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{
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return a + b;
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}
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/* a host global visible to JIT code */
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static const char host_message[] = "Hello from host!";
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/* JIT code as a string */
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static const char *jit_code =
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"#include <pcclib.h>\n"
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"extern int c_host_add(int a, int b);\n"
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"#ifdef _WIN32\n"
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" __attribute__((dllimport))\n"
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"#endif\n"
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"extern const char host_message[];\n"
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"int jit_run(int n)\n"
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"{\n"
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" int sum = 0;\n"
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" for (int i = 1; i <= n; i++) sum += i;\n"
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" printf(\"%s\\n\", host_message);\n"
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" printf(\"JIT: c_host_add(%d, %d) = %d\\n\", n, 7, c_host_add(n, 7));\n"
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" printf(\"JIT: sum(1..%d) = %d\\n\", n, sum);\n"
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" return sum;\n"
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"}\n";
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int main(void)
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{
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PCCState *s;
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int (*jit_run)(int);
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printf("=== libpcc JIT demo ===\n\n");
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/* 1. create compiler state */
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s = pcc_new();
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if (!s) {
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fprintf(stderr, "pcc_new failed\n");
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return 1;
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}
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/* 2. error/warning printer */
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pcc_set_error_func(s, stderr, handle_error);
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/* 3. JIT mode: compile to memory, not to a file */
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pcc_set_output_type(s, PCC_OUTPUT_MEMORY);
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/* 4. compile the JIT source string */
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printf("Compiling JIT code...\n");
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if (pcc_compile_string(s, jit_code) == -1) {
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fprintf(stderr, "JIT compile failed\n");
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pcc_delete(s);
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return 1;
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}
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/* 5. expose host symbols to the JIT code (after compile) */
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pcc_add_symbol(s, "c_host_add", c_host_add);
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pcc_add_symbol(s, "host_message", host_message);
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/* 6. relocate: produce executable machine code */
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if (pcc_relocate(s) < 0) {
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fprintf(stderr, "JIT relocate failed\n");
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pcc_delete(s);
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return 1;
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}
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printf("JIT code relocated to memory\n\n");
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/* 7. get the JIT-compiled function and call it */
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jit_run = pcc_get_symbol(s, "jit_run");
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if (!jit_run) {
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fprintf(stderr, "symbol jit_run not found\n");
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pcc_delete(s);
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return 1;
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}
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printf("Calling JIT function jit_run(10)...\n");
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{
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int ret = jit_run(10);
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printf("\nJIT jit_run(10) returned %d\n", ret);
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}
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pcc_delete(s);
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printf("\n=== JIT demo done ===\n");
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return 0;
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}
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