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std.heap.DebugAllocator: default wasm to 64K page size

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including on freestanding
This commit is contained in:
Andrew Kelley 2025-02-22 17:43:27 -08:00
parent dd54c48aa2
commit 8683f25d24
1 changed files with 10 additions and 5 deletions
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15
lib/std/heap/debug_allocator.zig
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@ -90,11 +90,16 @@ const mem = std.mem;
const Allocator = std.mem.Allocator; const Allocator = std.mem.Allocator;
const StackTrace = std.builtin.StackTrace; const StackTrace = std.builtin.StackTrace;
const default_page_size: usize = @max(std.heap.page_size_max, switch (builtin.os.tag) { const default_page_size: usize = switch (builtin.os.tag) {
.windows => 64 * 1024, // Makes `std.heap.PageAllocator` take the happy path. // Makes `std.heap.PageAllocator` take the happy path.
.wasi => 64 * 1024, // Max alignment supported by `std.heap.WasmAllocator`. .windows => 64 * 1024,
else => 128 * 1024, // Avoids too many active mappings when `page_size_max` is low. else => switch (builtin.cpu.arch) {
}); // Max alignment supported by `std.heap.WasmAllocator`.
.wasm32, .wasm64 => 64 * 1024,
// Avoids too many active mappings when `page_size_max` is low.
else => @max(std.heap.page_size_max, 128 * 1024),
},
};
const Log2USize = std.math.Log2Int(usize); const Log2USize = std.math.Log2Int(usize);