42 lines
1.1 KiB
Zig
42 lines
1.1 KiB
Zig
const Allocator = @import("mem.zig").Allocator;
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const io = @import("io.zig");
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pub fn assert(b: bool) {
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if (!b) unreachable{}
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}
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pub fn printStackTrace() {
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var maybe_fp: ?&const u8 = @frameAddress();
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while (true) {
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const fp = maybe_fp ?? break;
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const return_address = *(&const usize)(usize(fp) + @sizeOf(usize));
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%%io.stderr.print_u64(return_address);
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%%io.stderr.printf("\n");
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maybe_fp = *(&const ?&const u8)(fp);
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}
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}
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pub var global_allocator = Allocator {
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.allocFn = globalAlloc,
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.reallocFn = globalRealloc,
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.freeFn = globalFree,
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.context = null,
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};
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var some_mem: [10 * 1024]u8 = undefined;
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var some_mem_index: usize = 0;
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fn globalAlloc(self: &Allocator, n: usize) -> %[]u8 {
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const result = some_mem[some_mem_index ... some_mem_index + n];
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some_mem_index += n;
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return result;
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}
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fn globalRealloc(self: &Allocator, old_mem: []u8, new_size: usize) -> %[]u8 {
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const result = %return globalAlloc(self, new_size);
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@memcpy(result.ptr, old_mem.ptr, old_mem.len);
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return result;
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}
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fn globalFree(self: &Allocator, old_mem: []u8) { }
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