| author |  David Rubin <david@vortan.dev> 2024-07-15 01:52:08-07:00 |
| committer | David Rubin <david@vortan.dev> 2024-07-26 04:05:41-07:00 |
| log | ba58b7b88143f93f671a53a4809c9724de898b8d |
| tree | 1c9e923abd948a471b60f34f948413942a325a29 |
| parent | d3f75522d7e18188748558c2ae20928b83d173bf |
| signature |  Commit is signed but in an unrecognized format. |
heap: create a work-around page-allocator
the risc-v backend doesn't have `@cmpxchg*` implemented and so it can't use the hint that the current page-allocator uses.
this work-around branch can be removed when I implement the atomic built-in.1 files changed, 14 insertions(+), 0 deletions(-)
lib- std
lib/std/heap/PageAllocator.zig+14
| ... | ... | @@ -34,6 +34,20 @@ fn alloc(_: *anyopaque, n: usize, log2_align: u8, ra: usize) ?[*]u8 { |
| 34 | 34 | return @ptrCast(addr); |
| 35 | 35 | } |
| 36 | 36 | |
| 37 | if (builtin.zig_backend == .stage2_riscv64) { | |
| 38 | const aligned_len = mem.alignForward(usize, n, mem.page_size); | |
| 39 | const slice = posix.mmap( | |
| 40 | null, | |
| 41 | aligned_len, | |
| 42 | posix.PROT.READ | posix.PROT.WRITE, | |
| 43 | .{ .TYPE = .PRIVATE, .ANONYMOUS = true }, | |
| 44 | -1, | |
| 45 | 0, | |
| 46 | ) catch return null; | |
| 47 | assert(mem.isAligned(@intFromPtr(slice.ptr), mem.page_size)); | |
| 48 | return slice.ptr; | |
| 49 | } | |
| 50 | ||
| 37 | 51 | const aligned_len = mem.alignForward(usize, n, mem.page_size); |
| 38 | 52 | const hint = @atomicLoad(@TypeOf(std.heap.next_mmap_addr_hint), &std.heap.next_mmap_addr_hint, .unordered); |
| 39 | 53 | const slice = posix.mmap( |