Fix wine-64bit bridge crash, safely fail instead (related to #124)

source/backend/engine/CarlaEngineBridge.cpp

@@ -61,13 +61,13 @@ CARLA_BACKEND_START_NAMESPACE
 struct BridgeAudioPool {
     CarlaString filename;
     float* data;
-    char shm[32];
+    char shm[64];
 
     BridgeAudioPool() noexcept
         : filename(),
           data(nullptr)
     {
-        carla_zeroChar(shm, 32);
+        carla_zeroChar(shm, 64);
         jackbridge_shm_init(shm);
     }
 
@@ -104,13 +104,13 @@ struct BridgeAudioPool {
 struct BridgeRtControl : public CarlaRingBuffer<StackBuffer> {
     CarlaString filename;
     BridgeRtData* data;
-    char shm[32];
+    char shm[64];
 
     BridgeRtControl() noexcept
         : filename(),
           data(nullptr)
     {
-        carla_zeroChar(shm, 32);
+        carla_zeroChar(shm, 64);
         jackbridge_shm_init(shm);
     }
 
@@ -165,13 +165,13 @@ struct BridgeRtControl : public CarlaRingBuffer<StackBuffer> {
 struct BridgeNonRtControl : public CarlaRingBuffer<BigStackBuffer> {
     CarlaString filename;
     BridgeNonRtData* data;
-    char shm[32];
+    char shm[64];
 
     BridgeNonRtControl() noexcept
         : filename(),
           data(nullptr)
     {
-        carla_zeroChar(shm, 32);
+        carla_zeroChar(shm, 64);
         jackbridge_shm_init(shm);
     }
 

source/modules/jackbridge/JackBridge2.cpp

@@ -161,26 +161,31 @@ bool jackbridge_sem_timedwait(void* sem, int secs) noexcept
 
 bool jackbridge_shm_is_valid(const void* shm) noexcept
 {
+    CARLA_SAFE_ASSERT_RETURN(shm != nullptr, false);
     return carla_is_shm_valid(*(const shm_t*)shm);
 }
 
 void jackbridge_shm_init(void* shm) noexcept
 {
+    CARLA_SAFE_ASSERT_RETURN(shm != nullptr,);
     carla_shm_init(*(shm_t*)shm);
 }
 
 void jackbridge_shm_attach(void* shm, const char* name) noexcept
 {
+    CARLA_SAFE_ASSERT_RETURN(shm != nullptr,);
     *(shm_t*)shm = carla_shm_attach(name);
 }
 
 void jackbridge_shm_close(void* shm) noexcept
 {
+    CARLA_SAFE_ASSERT_RETURN(shm != nullptr,);
     carla_shm_close(*(shm_t*)shm);
 }
 
 void* jackbridge_shm_map(void* shm, size_t size) noexcept
 {
+    CARLA_SAFE_ASSERT_RETURN(shm != nullptr, nullptr);
     return carla_shm_map(*(shm_t*)shm, size);
 }