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compiler_rt memcpy: avoid infinite recursion

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when compiled in debug mode (--debug-rt)
This commit is contained in:
Andrew Kelley
2025-02-10 16:13:35 -08:00
parent 1d8857bbe3
commit 8d914ea734
1 changed files with 5 additions and 4 deletions
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9
lib/compiler_rt/memcpy.zig
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@@ -175,10 +175,11 @@ inline fn copyRange4(
const last = len - copy_len;
const pen = last - b;
dest[0..copy_len].* = src[0..copy_len].*;
dest[b..][0..copy_len].* = src[b..][0..copy_len].*;
dest[pen..][0..copy_len].* = src[pen..][0..copy_len].*;
dest[last..][0..copy_len].* = src[last..][0..copy_len].*;
const Int = @Type(.{ .int = .{ .signedness = .unsigned, .bits = copy_len * 8 } });
@as(*align(1) Int, @ptrCast(dest[0..copy_len])).* = @as(*align(1) const Int, @ptrCast(src[0..copy_len])).*;
@as(*align(1) Int, @ptrCast(dest[b..][0..copy_len])).* = @as(*align(1) const Int, @ptrCast(src[b..][0..copy_len])).*;
@as(*align(1) Int, @ptrCast(dest[pen..][0..copy_len])).* = @as(*align(1) const Int, @ptrCast(src[pen..][0..copy_len])).*;
@as(*align(1) Int, @ptrCast(dest[last..][0..copy_len])).* = @as(*align(1) const Int, @ptrCast(src[last..][0..copy_len])).*;
}
test "memcpy" {