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aligns at 16 finally

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Mattthew Heath 2024-12-06 18:35:49 +00:00
parent addd826511
commit 8c2cdeb332
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1 changed files with 23 additions and 10 deletions
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33
crates/compiler/builtins/bitcode/src/utils.zig
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@ -74,16 +74,22 @@ comptime {
}
}
fn testing_roc_alloc(size: usize, alignment: u32) callconv(.C) ?*anyopaque {
if (alignment > @alignOf(usize)) {
fn testing_roc_alloc(size: usize, nominal_alignment: u32) callconv(.C) ?*anyopaque {
const real_alignment = 16;
if (nominal_alignment > real_alignment) {
@panic("alignments larger than that of usize are not currently supported");
}
// We store an extra usize which is the size of the full allocation.
const full_size = size + @sizeOf(usize);
var raw_ptr = (std.testing.allocator.alignedAlloc(u8, @alignOf(usize), full_size) catch unreachable).ptr;
@as([*]usize, @alignCast(@ptrCast(raw_ptr)))[0] = full_size;
raw_ptr += @sizeOf(usize);
const ptr = @as(?*anyopaque, @ptrCast(raw_ptr));
const size_of_size = @sizeOf(usize);
const alignments_needed = size_of_size / real_alignment + comptime if (size_of_size % real_alignment == 0) 0 else 1;
const extra_bytes = alignments_needed * size_of_size;
// We store an extra usize which is the size of the data plus the size.
const full_size = size + extra_bytes;
const written_to_size = size + size_of_size;
const raw_ptr = (std.testing.allocator.alignedAlloc(u8, real_alignment, full_size) catch unreachable).ptr;
@as([*]align(real_alignment) usize, @ptrCast(raw_ptr))[extra_bytes - size_of_size] = written_to_size;
const ptr = @as(?*anyopaque, @ptrCast(raw_ptr + extra_bytes));
if (DEBUG_TESTING_ALLOC and builtin.target.cpu.arch != .wasm32) {
std.debug.print("+ alloc {*}: {} bytes\n", .{ ptr, size });
@ -110,8 +116,15 @@ fn testing_roc_realloc(c_ptr: *anyopaque, new_size: usize, old_size: usize, _: u
}
fn testing_roc_dealloc(c_ptr: *anyopaque, _: u32) callconv(.C) void {
const raw_ptr = @as([*]align(@alignOf(usize)) u8, @alignCast(@ptrCast(c_ptr))) - @sizeOf(usize);
const full_size = @as([*]usize, @alignCast(@ptrCast(raw_ptr)))[0];
const alignment = 16;
const size_of_size = @sizeOf(usize);
const alignments_needed = size_of_size / alignment + comptime if (size_of_size % alignment == 0) 0 else 1;
const extra_bytes = alignments_needed * size_of_size;
const byte_array = @as([*]u8, @ptrCast(c_ptr)) - extra_bytes;
const raw_ptr = @as([*]align(alignment) u8, @alignCast(byte_array));
const offset_from_raw_to_size = extra_bytes - size_of_size;
const size_of_data_and_size = @as([*]usize, @alignCast(@ptrCast(raw_ptr)))[offset_from_raw_to_size];
const full_size = size_of_data_and_size + offset_from_raw_to_size;
const slice = raw_ptr[0..full_size];
if (DEBUG_TESTING_ALLOC and builtin.target.cpu.arch != .wasm32) {