demon helper for reading cstrings

src/demon/demon_core.c

@@ -156,3 +156,33 @@ dmn_rsp_from_thread(DMN_Handle thread)
   scratch_end(scratch);
   return result;
 }
+
+////////////////////////////////
+//~ Memory Helpers
+
+internal String8
+dmn_process_read_cstring(Arena *arena, DMN_Handle process, U64 addr)
+{
+  Temp scratch = scratch_begin(&arena, 1);
+
+  String8List block_list = {0};
+
+  for(U64 cursor = addr, stride = 256; ; cursor += stride)
+  {
+    U8      *raw_block = push_array_no_zero(scratch.arena, U8, stride);
+    U64      read_size = dmn_process_read(process, r1u64(cursor, cursor + stride), raw_block);
+    String8  block     = str8_cstring_capped(raw_block, raw_block + read_size);
+
+    str8_list_push(scratch.arena, &block_list, block);
+
+    if(read_size != stride || (block.size+1 <= read_size && block.str[block.size] == 0))
+    {
+      break;
+    }
+  }
+
+  String8 result = str8_list_join(arena, &block_list, 0);
+
+  scratch_end(scratch);
+  return result;
+}

src/demon/demon_core.h

@@ -226,6 +226,7 @@ internal U64 dmn_process_read(DMN_Handle process, Rng1U64 range, void *dst);
 internal B32 dmn_process_write(DMN_Handle process, Rng1U64 range, void *src);
 #define dmn_process_read_struct(process, vaddr, ptr) dmn_process_read((process), r1u64((vaddr), (vaddr)+(sizeof(*ptr))), ptr)
 #define dmn_process_write_struct(process, vaddr, ptr) dmn_process_write((process), r1u64((vaddr), (vaddr)+(sizeof(*ptr))), ptr)
+internal String8 dmn_process_read_cstring(Arena *arena, DMN_Handle process, U64 addr);
 
 //- rjf: threads
 internal Arch dmn_arch_from_thread(DMN_Handle handle);