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std.testing.allocator: different canary + enable resize traces

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Accept a slight performance degradation when unit testing for better
debuggability when a leak or double-free is detected.
This commit is contained in:
Andrew Kelley 2025-02-05 16:39:14 -08:00
parent 8282565ce5
commit f82ec3f02a
1 changed files with 5 additions and 0 deletions
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lib/std/testing.zig
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@ -18,6 +18,11 @@ var base_allocator_instance = std.heap.FixedBufferAllocator.init("");
pub const allocator = allocator_instance.allocator();
pub var allocator_instance: std.heap.GeneralPurposeAllocator(.{
.stack_trace_frames = 10,
.resize_stack_traces = true,
// A unique value so that when a default-constructed
// GeneralPurposeAllocator is incorrectly passed to testing allocator, or
// vice versa, panic occurs.
.canary = @truncate(0x2731e675c3a701ba),
}) = b: {
if (!builtin.is_test) @compileError("testing allocator used when not testing");
break :b .init;