Hi, This patch gives the definition of _Unwind_Exception on the D side a suitable alignment. For interoperability with C++ EH, the alignment should match, otherwise D may not be able to intercept exceptions thrown from C++. Ideally the correct alignment should be exposed by the compiler, but for now this is good enough for current supported targets.
Bootstrapped and regression tested on x86_64-linux-gnu/-m32/-mx32, and committed to mainline. Regards Iain --- libphobos/ChangeLog: * libdruntime/gcc/unwind/generic.d (__aligned__): Define. (_Unwind_Exception): Align struct to __aligned__. --- libphobos/libdruntime/gcc/unwind/generic.d | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/libphobos/libdruntime/gcc/unwind/generic.d b/libphobos/libdruntime/gcc/unwind/generic.d index 592b3afcb71..68ddd1d5410 100644 --- a/libphobos/libdruntime/gcc/unwind/generic.d +++ b/libphobos/libdruntime/gcc/unwind/generic.d @@ -123,7 +123,27 @@ enum : _Unwind_Reason_Code // @@@ The IA-64 ABI says that this structure must be double-word aligned. // Taking that literally does not make much sense generically. Instead we // provide the maximum alignment required by any type for the machine. -struct _Unwind_Exception + version (ARM) private enum __aligned__ = 8; +else version (AArch64) private enum __aligned__ = 16; +else version (HPPA) private enum __aligned__ = 8; +else version (HPPA64) private enum __aligned__ = 16; +else version (MIPS_N32) private enum __aligned__ = 16; +else version (MIPS_N64) private enum __aligned__ = 16; +else version (MIPS32) private enum __aligned__ = 8; +else version (MIPS64) private enum __aligned__ = 8; +else version (PPC) private enum __aligned__ = 16; +else version (PPC64) private enum __aligned__ = 16; +else version (RISCV32) private enum __aligned__ = 16; +else version (RISCV64) private enum __aligned__ = 16; +else version (S390) private enum __aligned__ = 8; +else version (SPARC) private enum __aligned__ = 8; +else version (SPARC64) private enum __aligned__ = 16; +else version (SystemZ) private enum __aligned__ = 8; +else version (X86) private enum __aligned__ = 16; +else version (X86_64) private enum __aligned__ = 16; +else static assert( false, "Platform not supported."); + +align(__aligned__) struct _Unwind_Exception { _Unwind_Exception_Class exception_class; _Unwind_Exception_Cleanup_Fn exception_cleanup; -- 2.30.2