zircon/kernel/lib/backtrace/backtrace_ffi.cc

// Copyright 2026 The Fuchsia Authors
//
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file or at
// https://opensource.org/licenses/MIT

#include <lib/backtrace.h>
#include <lib/object-constants.h>
#include <stddef.h>

#include <ktl/type_traits.h>

// The layout is shared with the Rust `Backtrace` in //zircon/kernel/lib/backtrace/src/mod.rs.
struct BacktraceLayoutCheck {
  static_assert(ktl::is_standard_layout_v<Backtrace>);
  static_assert(ktl::is_trivially_copyable_v<Backtrace>);
  static_assert(sizeof(Backtrace) == kBacktraceSize);
  static_assert(alignof(Backtrace) == kBacktraceAlign);
  static_assert(Backtrace::kMaxSize == 32);
  static_assert(offsetof(Backtrace, addr_) == 0);
  static_assert(offsetof(Backtrace, size_) == 256);
  static_assert(offsetof(Backtrace, first_frame_type_) == 264);
  static_assert(sizeof(Backtrace::FrameType) == 4);
  static_assert(alignof(Backtrace::FrameType) == 4);
  static_assert(Backtrace::FrameType::ReturnAddress == 0);
  static_assert(Backtrace::FrameType::PreciseLocation == 1);
};