diff --git a/Makefile b/Makefile
index 0dcf18ca8..55aca45ba 100644
--- a/Makefile
+++ b/Makefile
@@ -76,6 +76,7 @@ include poincare/Makefile
include escher/Makefile
# Executable Makefiles
include apps/Makefile
+include build/struct_layout/Makefile
include quiz/Makefile # Quiz needs to be included at the end
products += $(objs)
diff --git a/build/struct_layout/Makefile b/build/struct_layout/Makefile
new file mode 100644
index 000000000..9579e8091
--- /dev/null
+++ b/build/struct_layout/Makefile
@@ -0,0 +1,8 @@
+products += build/struct_layout/apps_container_layout.json
+build/struct_layout/apps_container_layout.json:
+ @echo "AST $@"
+ @clang -cc1 -x c++ -v -fdump-record-layouts apps/main.cpp -Iescher/include -Ikandinsky/include -Iion/include -Ipoincare/include -std=c++11 -emit-llvm-only -o /dev/null > foo.txt
+ @echo "JSON $@"
+ @cat foo.txt | ruby build/struct_layout/ast_to_json.rb AppsContainer > $@
+ @rm foo.txt
+
diff --git a/build/struct_layout/ast_to_json.rb b/build/struct_layout/ast_to_json.rb
new file mode 100644
index 000000000..38726ec4e
--- /dev/null
+++ b/build/struct_layout/ast_to_json.rb
@@ -0,0 +1,83 @@
+#!/usr/bin/env ruby
+
+# Takes an clang-generated AST in stdin
+# Outputs a D3-compliant JSON file
+
+require 'json'
+
+class CodeStruct
+ attr_accessor :name, :starts_at, :size
+
+ def initialize(parent, name, starts_at)
+ @parent = parent
+ @name = name
+ @starts_at = starts_at
+ @size = 0
+ @children = []
+ @parent.add_child(self) unless @parent.nil?
+ end
+
+ def ends_at(offset)
+ @size = offset-@starts_at
+ end
+
+ def add_child(s)
+ @children.push(s)
+ end
+
+ def as_d3_dict
+ res = {name: name}
+ if @children.empty?
+ res[:value] = size
+ else
+ res[:children] = @children.map{|c| c.as_d3_dict}
+ end
+ res
+ end
+
+ def log(space = 0)
+ puts (" "*space) + "#{name} (SIZE=#{size})"
+ @children.each do |child|
+ child.log(space+2)
+ end
+ end
+end
+
+def handleNewLine(line, index, stack)
+ # Example : " 213736 | class Timer (primary base)"
+ offset, depth, name = line.match(/\s*([0-9]+)\s\|(\s+)(.*)/).captures
+ offset = offset.to_i
+ depth = (depth.size-1)/2
+
+ parent = stack[depth-1]
+ stack[depth..-1].each do |finished|
+ finished.ends_at(offset)
+ end
+ stack = stack[0...depth]
+ struct = CodeStruct.new(parent, name, offset)
+ stack.push(struct)
+
+ return stack
+end
+
+class_name = ARGV[0]
+
+stack = []
+ignore_line = true
+STDIN.each_line.with_index do |l,i|
+ if l == " 0 | class #{class_name}\n"
+ ignore_line = false
+ end
+ if l.start_with?(" | ") && ignore_line == false
+ ignore_line = true
+ end_offset = l.match(/sizeof=([0-9]+)/).captures.first
+ end_offset = end_offset.to_i
+ stack[-1].ends_at(end_offset)
+ stack[0].ends_at(end_offset)
+ end
+ unless ignore_line
+ stack = handleNewLine(l, i, stack)
+ end
+end
+
+puts JSON.generate(stack[0].as_d3_dict)
diff --git a/build/struct_layout/visualisation.html b/build/struct_layout/visualisation.html
new file mode 100644
index 000000000..88d0d59c5
--- /dev/null
+++ b/build/struct_layout/visualisation.html
@@ -0,0 +1,243 @@
+
+
+
+AppsContainer size breakdown
+
+
+AppsContainer size breakdown
+
+
+
+
+