L0Debug - disallow attaching to multiple pids

Resolves: NEO-7476

Signed-off-by: Mateusz Hoppe <[email protected]>

Author: HoppeMateusz

level_zero/tools/source/debug/debug_handlers.cpp

@@ -38,6 +38,18 @@ ze_result_t debugAttach(zet_device_handle_t hDevice, const zet_debug_config_t *c
 
     auto rootSession = L0::Device::fromHandle(hDevice)->getNEODevice()->getRootDevice()->getSpecializedDevice<DeviceImp>()->getDebugSession(*config);
 
+    if (session && session->isAttached()) {
+        if (session->getDebugConfig().pid != config->pid) {
+            return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE;
+        }
+    }
+
+    if (rootSession) {
+        if (rootSession->getDebugConfig().pid != config->pid) {
+            return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE;
+        }
+    }
+
     // If root device with active TileSessions or
     // subdevice with root device attached - fail
     if ((!L0::Device::fromHandle(hDevice)->getNEODevice()->isSubDevice() && session && !session->areAllTileDebugSessionDetached()) ||

level_zero/tools/source/debug/debug_session.h

@@ -46,6 +46,7 @@ struct DebugSession : _zet_debug_session_handle_t {
     MOCKABLE_VIRTUAL bool areRequestedThreadsStopped(ze_device_thread_t thread);
 
     Device *getConnectedDevice() { return connectedDevice; }
+    zet_debug_config_t getDebugConfig() { return config; }
 
     static bool isThreadAll(ze_device_thread_t thread) {
         return thread.slice == UINT32_MAX && thread.subslice == UINT32_MAX && thread.eu == UINT32_MAX && thread.thread == UINT32_MAX;
@@ -129,6 +130,7 @@ struct DebugSession : _zet_debug_session_handle_t {
     NEO::DebugAreaHeader debugArea;
 
     Device *connectedDevice = nullptr;
+    const zet_debug_config_t config;
     std::map<uint64_t, std::unique_ptr<EuThread>> allThreads;
     bool attached = false;
 };

level_zero/tools/source/debug/debug_session_imp.cpp

@@ -19,7 +19,7 @@
 
 namespace L0 {
 
-DebugSession::DebugSession(const zet_debug_config_t &config, Device *device) : connectedDevice(device) {
+DebugSession::DebugSession(const zet_debug_config_t &config, Device *device) : connectedDevice(device), config(config) {
 }
 
 const NEO::TopologyMap &DebugSession::getTopologyMap() {

level_zero/tools/source/debug/linux/prelim/debug_session.cpp

@@ -297,7 +297,6 @@ void DebugSessionLinux::createTileSessionsIfEnabled() {
     auto numTiles = connectedDevice->getNEODevice()->getNumSubDevices();
     if (numTiles > 0 && tileAttachEnabled) {
         tileSessions.resize(numTiles);
-        zet_debug_config_t config = {};
 
         for (uint32_t i = 0; i < numTiles; i++) {
             auto subDevice = connectedDevice->getNEODevice()->getSubDevice(i)->getSpecializedDevice<Device>();