robustify ctrl memory streaming cache & texture cache layer to unreasonably large sizes/dimensions

src/base/base_arena.c

@@ -10,44 +10,44 @@ arena_alloc__sized(U64 init_res, U64 init_cmt)
   ProfBeginFunction();
   Assert(ARENA_HEADER_SIZE < init_cmt && init_cmt <= init_res);
   
-  void *memory;
+  void *memory = 0;
-  U64 res;
+  U64 res = 0;
-  U64 cmt;
+  U64 cmt = 0;
-  
   B32 large_pages = os_large_pages_enabled();
-  if (large_pages) {
+  if(large_pages)
+  {
     U64 page_size = os_large_page_size();
     res = AlignPow2(init_res, page_size);
-    
 #if OS_WINDOWS
     cmt = res;
 #else
     cmt = AlignPow2(init_cmt, page_size);
 #endif
-    
     memory = os_reserve_large(res);
-    if (!os_commit_large(memory, cmt)) {
+    if(!os_commit_large(memory, cmt))
+    {
       memory = 0;
       os_release(memory, res);
     }
-  } else {
+  }
+  else
+  {
     U64 page_size = os_page_size();
     res = AlignPow2(init_res, page_size);
     cmt = AlignPow2(init_cmt, page_size);
-    
     memory = os_reserve(res);
-    if (!os_commit(memory, cmt)) {
+    if(!os_commit(memory, cmt))
+    {
       memory = 0;
       os_release(memory, res);
     }
   }
-  Assert(memory);
-  
-  AsanPoisonMemoryRegion(memory, cmt);
-  AsanUnpoisonMemoryRegion(memory, ARENA_HEADER_SIZE);
   
   Arena *arena = (Arena*)memory;
-  if (arena) {
+  if(arena)
+  {
+    AsanPoisonMemoryRegion(memory, cmt);
+    AsanUnpoisonMemoryRegion(memory, ARENA_HEADER_SIZE);
     arena->prev        = 0;
     arena->current     = arena;
     arena->base_pos    = 0;
@@ -148,7 +148,6 @@ arena_push__impl(Arena *arena, U64 size)
       cmt_new_size    = cmt_new_clamped - current->cmt;
       is_cmt_ok       = os_commit((U8*)current + current->cmt, cmt_new_size);
     }
-    Assert(is_cmt_ok);
     
     if (is_cmt_ok) {
       current->cmt = cmt_new_clamped;

src/ctrl/ctrl_core.c

@@ -3232,6 +3232,14 @@ ctrl_mem_stream_thread__entry_point(void *p)
       take_task__break_all:;
     }
     
+    //- rjf: clamp range to be sensible
+    Rng1U64 vaddr_range_clamped = vaddr_range;
+    {
+      vaddr_range_clamped.max = Max(vaddr_range_clamped.max, vaddr_range_clamped.min);
+      U64 max_size_cap = Min(max_U64-vaddr_range_clamped.min, GB(1));
+      vaddr_range_clamped.max = Min(vaddr_range_clamped.max, vaddr_range_clamped.min+max_size_cap);
+    }
+    
     //- rjf: task was taken -> read memory
     U64 range_size = 0;
     Arena *range_arena = 0;
@@ -3240,11 +3248,17 @@ ctrl_mem_stream_thread__entry_point(void *p)
     U64 memgen_idx = ctrl_memgen_idx();
     if(got_task && memgen_idx != preexisting_memgen_idx)
     {
-      range_size = dim_1u64(vaddr_range);
+      range_size = dim_1u64(vaddr_range_clamped);
       U64 arena_size = AlignPow2(range_size + ARENA_HEADER_SIZE, KB(64));
       range_arena = arena_alloc__sized(range_size+ARENA_HEADER_SIZE, range_size+ARENA_HEADER_SIZE);
+      if(range_arena == 0)
+      {
+        range_size = 0;
+      }
+      else
+      {
         range_base = push_array_no_zero(range_arena, U8, range_size);
-      U64 bytes_read = ctrl_process_read(machine_id, process, vaddr_range, range_base);
+        U64 bytes_read = ctrl_process_read(machine_id, process, vaddr_range_clamped, range_base);
         if(bytes_read == 0)
         {
           arena_release(range_arena);
@@ -3269,6 +3283,7 @@ ctrl_mem_stream_thread__entry_point(void *p)
           }
         }
       }
+    }
     
     //- rjf: read successful -> submit to hash store
     U128 hash = {0};

src/df/gfx/df_view_rule_hooks.c

@@ -933,7 +933,11 @@ DF_GFX_VIEW_RULE_BLOCK_UI_FUNCTION_DEF(bitmap)
           df_gfx_request_frame();
         }
       }
-      if(sig.hovering)
+      if(sig.hovering && r_handle_match(texture, r_handle_zero())) UI_Tooltip
+      {
+        ui_labelf("Texture not loaded.");
+      }
+      if(sig.hovering && !r_handle_match(texture, r_handle_zero()))
       {
         if(dim.y > (F32)topology_info.height)
         {

src/texture_cache/texture_cache.c

@@ -8,8 +8,8 @@ internal TEX_Topology
 tex_topology_make(Vec2S32 dim, R_Tex2DFormat fmt)
 {
   TEX_Topology top = {0};
-  top.dim.x = (S16)dim.x;
+  top.dim.x = (S16)Clamp(0, dim.x, max_S32);
-  top.dim.y = (S16)dim.y;
+  top.dim.y = (S16)Clamp(0, dim.y, max_S32);
   top.fmt = fmt;
   return top;
 }
@@ -352,7 +352,7 @@ tex_xfer_thread__entry_point(void *p)
     
     //- rjf: data * topology -> texture
     R_Handle texture = {0};
-    if(got_task && top.dim.x != 0 && top.dim.y != 0 && data.size >= (U64)top.dim.x*(U64)top.dim.y*r_tex2d_format_bytes_per_pixel_table[top.fmt])
+    if(got_task && top.dim.x > 0 && top.dim.y > 0 && data.size >= (U64)top.dim.x*(U64)top.dim.y*(U64)r_tex2d_format_bytes_per_pixel_table[top.fmt])
     {
       texture = r_tex2d_alloc(R_Tex2DKind_Static, v2s32(top.dim.x, top.dim.y), top.fmt, data.str);
     }