From 60745adeef06841bcd322b4139f79c86fa7e0696 Mon Sep 17 00:00:00 2001
From: cnc <cnc@localhost>
Date: Fri, 5 Jun 2026 09:59:06 +0800
Subject: [PATCH] =?UTF-8?q?=E6=89=A7=E8=A1=8C=20AGENTS=20align-linuxcnc=20?=
 =?UTF-8?q?=E5=8A=A0=E9=80=9F=E8=A7=84=E5=88=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

结论：补强 WASM tooldata 可执行探针，依据 LinuxCNC src/emc/tooldata/tooldata_mmap.cc 非随机刀库 T0 查找优先返回 pocket 0 的源行为。验证通过：./test-linuxcnc-wasm-tooldata-link.sh、./test-native.sh、./test-linuxcnc-source-link.sh。
---
 .../tooldata/tooldata_probe_main.cc           | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/core/wasm_shims/tooldata/tooldata_probe_main.cc b/core/wasm_shims/tooldata/tooldata_probe_main.cc
index 506aa70..3e36a66 100644
--- a/core/wasm_shims/tooldata/tooldata_probe_main.cc
+++ b/core/wasm_shims/tooldata/tooldata_probe_main.cc
@@ -84,6 +84,35 @@ int main() {
         return 45;
     }
 
+    const pid_t nonrandom_t0_child = fork();
+    if (nonrandom_t0_child < 0) {
+        return 64;
+    }
+    if (nonrandom_t0_child == 0) {
+        if (tool_mmap_creator(nullptr, 0) != 0) {
+            _exit(65);
+        }
+        CANON_TOOL_TABLE nonrandom_t0 = tooldata_entry_init();
+        nonrandom_t0.toolno = 0;
+        nonrandom_t0.pocketno = 12;
+        if (tooldata_put(nonrandom_t0, 12) == IDX_FAIL) {
+            _exit(66);
+        }
+        // LinuxCNC src/emc/tooldata/tooldata_mmap.cc returns pocket 0 for T0
+        // before scanning table entries when the toolchanger is not random.
+        if (tooldata_find_index_for_tool(0) != 0) {
+            _exit(67);
+        }
+        _exit(0);
+    }
+    int nonrandom_t0_status = 0;
+    if (waitpid(nonrandom_t0_child, &nonrandom_t0_status, 0) != nonrandom_t0_child) {
+        return 68;
+    }
+    if (!WIFEXITED(nonrandom_t0_status) || WEXITSTATUS(nonrandom_t0_status) != 0) {
+        return 69;
+    }
+
     if (tool_mmap_user() != -1) {
         return 25;
     }