stage1 实现ir2vm 修复nob test命令的构建问题

nob_popen.h

@@ -15,34 +15,125 @@ typedef struct {
     int count;
 } Nob_Files;
 
-// 运行命令，捕获 stdout 和退出码（不支持 stdin 和 stderr）
+// 运行命令，捕获 stdout（Windows 下会合并 stderr）和真实退出码。
+// 返回 true 仅表示命令成功启动并完成，不代表 exit_code == 0。
 bool nob_cmd_capture_popen(const char *tname, Nob_Cmd_Result *res) {
     memset(res, 0, sizeof(*res));
 
 #ifdef _WIN32
-    FILE *fp = _popen(tname, "r");
-#else
-    FILE *fp = popen(tname, "r");
-#endif
+    // ---------- Windows: CreateProcessA + 匿名管道 ----------
+    SECURITY_ATTRIBUTES sa = {0};
+    sa.nLength = sizeof(sa);
+    sa.bInheritHandle = TRUE;
+    sa.lpSecurityDescriptor = NULL;
 
+    HANDLE hRead = NULL;
+    HANDLE hWrite = NULL;
+    if (!CreatePipe(&hRead, &hWrite, &sa, 0)) {
+        nob_log(NOB_ERROR, "CreatePipe failed: %s", nob_win32_error_message(GetLastError()));
+        return false;
+    }
+
+    // 读端不能被继承，否则父进程 ReadFile 永远等不到 EOF
+    if (!SetHandleInformation(hRead, HANDLE_FLAG_INHERIT, 0)) {
+        nob_log(NOB_ERROR, "SetHandleInformation failed: %s",
+                nob_win32_error_message(GetLastError()));
+        CloseHandle(hRead);
+        CloseHandle(hWrite);
+        return false;
+    }
+
+    STARTUPINFOA si = {0};
+    si.cb = sizeof(si);
+    si.dwFlags = STARTF_USESTDHANDLES;
+    si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+    si.hStdOutput = hWrite;
+    si.hStdError = hWrite; // 把 stderr 也并入 out，需要分离的话另开一条管道
+
+    PROCESS_INFORMATION pi = {0};
+
+    // CreateProcessA 会就地修改 lpCommandLine，必须传可写缓冲
+    char *cmdline = NULL;
+    {
+        size_t n = strlen(tname) + 1;
+        cmdline = (char *)malloc(n);
+        if (!cmdline) {
+            CloseHandle(hRead);
+            CloseHandle(hWrite);
+            nob_log(NOB_ERROR, "malloc failed");
+            return false;
+        }
+        memcpy(cmdline, tname, n);
+    }
+
+    BOOL ok = CreateProcessA(NULL,             // lpApplicationName: 让系统从 lpCommandLine 里解析
+                             cmdline,          // lpCommandLine
+                             NULL,             // lpProcessAttributes
+                             NULL,             // lpThreadAttributes
+                             TRUE,             // bInheritHandles: 必须为 TRUE，才能继承管道写端
+                             CREATE_NO_WINDOW, // 不弹黑窗；想弹就传 0
+                             NULL,             // lpEnvironment
+                             NULL,             // lpCurrentDirectory
+                             &si, &pi);
+
+    free(cmdline);
+
+    // 无论成功与否，父进程都不再需要写端（子进程已持有自己的副本）
+    CloseHandle(hWrite);
+
+    if (!ok) {
+        nob_log(NOB_ERROR, "CreateProcessA failed for \"%s\": %s", tname,
+                nob_win32_error_message(GetLastError()));
+        CloseHandle(hRead);
+        return false;
+    }
+
+    // ---------- 读取 stdout ----------
+    {
+        char buffer[4096];
+        DWORD n = 0;
+        while (ReadFile(hRead, buffer, sizeof(buffer), &n, NULL) && n > 0) {
+            nob_sb_append_buf(&res->out, buffer, (size_t)n);
+        }
+    }
+    CloseHandle(hRead);
+
+    // ---------- 等待并取真实退出码 ----------
+    WaitForSingleObject(pi.hProcess, INFINITE);
+    DWORD code = 0;
+    if (!GetExitCodeProcess(pi.hProcess, &code)) {
+        nob_log(NOB_ERROR, "GetExitCodeProcess failed: %s",
+                nob_win32_error_message(GetLastError()));
+        code = (DWORD)-1;
+    }
+    res->exit_code = (int)code;
+
+    CloseHandle(pi.hProcess);
+    CloseHandle(pi.hThread);
+
+#else
+    // ---------- POSIX: popen ----------
+    FILE *fp = popen(tname, "r");
     if (!fp) {
-        nob_log(NOB_ERROR, "popen failed");
+        nob_log(NOB_ERROR, "popen failed: %s", strerror(errno));
         return false;
     }
 
-    // 读取输出到 String_Builder
     char buffer[4096];
     while (fgets(buffer, sizeof(buffer), fp)) {
         nob_sb_append_cstr(&res->out, buffer);
     }
 
-    // 获取退出码
-#ifdef _WIN32
-    res->exit_code = _pclose(fp);
-#else
-    res->exit_code = pclose(fp);
-    if (WIFEXITED(res->exit_code))
-        res->exit_code = WEXITSTATUS(res->exit_code);
+    int status = pclose(fp);
+    if (status == -1) {
+        nob_log(NOB_ERROR, "pclose failed: %s", strerror(errno));
+        return false;
+    }
+    if (WIFEXITED(status))
+        status = WEXITSTATUS(status);
+    else if (WIFSIGNALED(status))
+        status = 128 + WTERMSIG(status);
+    res->exit_code = status;
 #endif
 
     res->ok = true;