oreodave/cw_tree
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Weird bug in draw_tree

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Seems near the 100,000 node mark, the vector craps itself?  I keep
getting "heap use after free" errors here when trying to access the
allocator vector.  Disabling fsan just leads to a segment fault near
the same point.

I think we might need to introduce our own vector :)
This commit is contained in:
Aryadev Chavali
2025-12-12 04:08:01 +00:00
parent 6ffa63f7ac
commit 424fab2e40
1 changed files with 19 additions and 8 deletions
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27
src/main.cpp
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@@ -52,7 +52,7 @@ constexpr u64 clamp_to_width(const DrawState &ds, f64 val)
(val - ds.bounds.lower_val);
}
void draw_tree(const DrawState &ds)
void draw_tree(const DrawState &ds, const State &state)
{
// Number line
DrawLine(0, HEIGHT / 2, WIDTH, HEIGHT / 2, WHITE);
@@ -63,18 +63,29 @@ void draw_tree(const DrawState &ds)
DrawLine(lower_x, LINE_TOP, lower_x, LINE_BOTTOM, WHITE);
DrawLine(upper_x, LINE_TOP, upper_x, LINE_BOTTOM, WHITE);
std::stack<cw::node::Node> stack;
stack.push(ds.state.allocator.get_val(0));
std::stack<std::pair<u64, f64>> stack;
cw::node::Node n = state.allocator.get_val(0);
stack.push(std::make_pair(0, n.value.norm));
while (!stack.empty())
{
auto n = stack.top();
u64 node_index;
f64 norm;
std::tie(node_index, norm) = stack.top();
stack.pop();
u64 x = clamp_to_width(ds, n.value.norm);
u64 x = clamp_to_width(ds, norm);
DrawLine(x, LINE_TOP, x, LINE_BOTTOM, RED);
cw::node::Node n = state.allocator.get_val(node_index);
if (n.left >= 0)
stack.push(ds.state.allocator.get_val(n.left));
{
cw::node::Node left = state.allocator.get_val(n.left);
stack.push(std::make_pair(n.left, left.value.norm));
}
if (n.right >= 0)
stack.push(ds.state.allocator.get_val(n.right));
{
cw::node::Node right = state.allocator.get_val(n.right);
stack.push(std::make_pair(n.right, right.value.norm));
}
}
}
@@ -145,7 +156,7 @@ int main(void)
ClearBackground(BLACK);
BeginDrawing();
draw_tree(draw_state);
draw_tree(draw_state, state);
DrawText(format_str.c_str(), WIDTH / 2 - format_str_width / 2, HEIGHT / 8,
FONT_SIZE, WHITE);
EndDrawing();