static Value *typed_store(Value *ptr, Value *idx_0based, Value *rhs,
jl_value_t *jltype, jl_codectx_t *ctx)
{
Type *elty = julia_type_to_llvm(jltype);
assert(elty != NULL);
if (elty==T_int1) { elty = T_int8; }
if (jl_is_bits_type(jltype))
rhs = emit_unbox(elty, PointerType::get(elty,0), rhs);
else
rhs = boxed(rhs);
Value *data = builder.CreateBitCast(ptr, PointerType::get(elty, 0));
return builder.CreateStore(rhs, builder.CreateGEP(data, idx_0based));
}
static Value *emit_array_nd_index(Value *a, size_t nd, jl_value_t **args,
size_t nidxs, jl_codectx_t *ctx)
{
Value *i = ConstantInt::get(T_size, 0);
Value *stride = ConstantInt::get(T_size, 1);
#if CHECK_BOUNDS==1
BasicBlock *failBB = BasicBlock::Create(getGlobalContext(), "oob");
BasicBlock *endBB = BasicBlock::Create(getGlobalContext(), "idxend");
#endif
for(size_t k=0; k < nidxs; k++) {
Value *ii = emit_unbox(T_size, T_psize, emit_unboxed(args[k], ctx));
ii = builder.CreateSub(ii, ConstantInt::get(T_size, 1));
i = builder.CreateAdd(i, builder.CreateMul(ii, stride));
if (k < nidxs-1) {
Value *d =
k >= nd ? ConstantInt::get(T_size, 1) : emit_arraysize(a, k+1);
#if CHECK_BOUNDS==1
BasicBlock *okBB = BasicBlock::Create(getGlobalContext(), "ib");
// if !(i < d) goto error
builder.CreateCondBr(builder.CreateICmpULT(ii, d), okBB, failBB);
ctx->f->getBasicBlockList().push_back(okBB);
builder.SetInsertPoint(okBB);
#endif
stride = builder.CreateMul(stride, d);
}
}
#if CHECK_BOUNDS==1
Value *alen = emit_arraylen(a);
// if !(i < alen) goto error
builder.CreateCondBr(builder.CreateICmpULT(i, alen), endBB, failBB);
ctx->f->getBasicBlockList().push_back(failBB);
builder.SetInsertPoint(failBB);
builder.CreateCall2(jlthrow_line_func, builder.CreateLoad(jlboundserr_var),
ConstantInt::get(T_int32, ctx->lineno));
builder.CreateUnreachable();
ctx->f->getBasicBlockList().push_back(endBB);
builder.SetInsertPoint(endBB);
#endif
return i;
}
// ccall(pointer, rettype, (argtypes...), args...)
static Value *emit_ccall(jl_value_t **args, size_t nargs, jl_codectx_t *ctx)
{
JL_NARGSV(ccall, 3);
jl_value_t *ptr=NULL, *rt=NULL, *at=NULL;
Value *jl_ptr=NULL;
JL_GC_PUSH(&ptr, &rt, &at);
ptr = static_eval(args[1], ctx, true);
if (ptr == NULL) {
jl_value_t *ptr_ty = expr_type(args[1], ctx);
Value *arg1 = emit_unboxed(args[1], ctx);
if (!jl_is_cpointer_type(ptr_ty)) {
emit_typecheck(arg1, (jl_value_t*)jl_voidpointer_type,
"ccall: function argument not a pointer or valid constant", ctx);
}
jl_ptr = emit_unbox(T_size, T_psize, arg1);
}
rt = jl_interpret_toplevel_expr_in(ctx->module, args[2],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
if (jl_is_tuple(rt)) {
std::string msg = "in " + ctx->funcName +
": ccall: missing return type";
jl_error(msg.c_str());
}
at = jl_interpret_toplevel_expr_in(ctx->module, args[3],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
void *fptr=NULL;
char *f_name=NULL, *f_lib=NULL;
if (ptr != NULL) {
if (jl_is_tuple(ptr) && jl_tuple_len(ptr)==1) {
ptr = jl_tupleref(ptr,0);
}
if (jl_is_symbol(ptr))
f_name = ((jl_sym_t*)ptr)->name;
else if (jl_is_byte_string(ptr))
f_name = jl_string_data(ptr);
if (f_name != NULL) {
// just symbol, default to JuliaDLHandle
#ifdef __WIN32__
fptr = jl_dlsym_e(jl_dl_handle, f_name);
if (!fptr) {
//TODO: when one of these succeeds, store the f_lib name (and clear fptr)
fptr = jl_dlsym_e(jl_kernel32_handle, f_name);
if (!fptr) {
fptr = jl_dlsym_e(jl_ntdll_handle, f_name);
if (!fptr) {
fptr = jl_dlsym_e(jl_crtdll_handle, f_name);
if (!fptr) {
fptr = jl_dlsym(jl_winsock_handle, f_name);
}
}
}
}
else {
// available in process symbol table
fptr = NULL;
}
#else
// will look in process symbol table
#endif
}
else if (jl_is_cpointer_type(jl_typeof(ptr))) {
fptr = *(void**)jl_bits_data(ptr);
}
else if (jl_is_tuple(ptr) && jl_tuple_len(ptr)>1) {
jl_value_t *t0 = jl_tupleref(ptr,0);
jl_value_t *t1 = jl_tupleref(ptr,1);
if (jl_is_symbol(t0))
f_name = ((jl_sym_t*)t0)->name;
else if (jl_is_byte_string(t0))
f_name = jl_string_data(t0);
else
JL_TYPECHK(ccall, symbol, t0);
if (jl_is_symbol(t1))
f_lib = ((jl_sym_t*)t1)->name;
else if (jl_is_byte_string(t1))
f_lib = jl_string_data(t1);
else
JL_TYPECHK(ccall, symbol, t1);
}
else {
JL_TYPECHK(ccall, pointer, ptr);
}
}
if (f_name == NULL && fptr == NULL && jl_ptr == NULL) {
JL_GC_POP();
emit_error("ccall: null function pointer", ctx);
return literal_pointer_val(jl_nothing);
}
JL_TYPECHK(ccall, type, rt);
JL_TYPECHK(ccall, tuple, at);
JL_TYPECHK(ccall, type, at);
jl_tuple_t *tt = (jl_tuple_t*)at;
std::vector<Type *> fargt(0);
std::vector<Type *> fargt_sig(0);
Type *lrt = julia_type_to_llvm(rt);
if (lrt == NULL) {
JL_GC_POP();
return literal_pointer_val(jl_nothing);
}
size_t i;
bool haspointers = false;
bool isVa = false;
size_t nargt = jl_tuple_len(tt);
std::vector<AttributeWithIndex> attrs;
for(i=0; i < nargt; i++) {
jl_value_t *tti = jl_tupleref(tt,i);
if (jl_is_seq_type(tti)) {
isVa = true;
tti = jl_tparam0(tti);
}
if (jl_is_bits_type(tti)) {
// see pull req #978. need to annotate signext/zeroext for
// small integer arguments.
jl_bits_type_t *bt = (jl_bits_type_t*)tti;
if (bt->nbits < 32) {
if (jl_signed_type == NULL) {
jl_signed_type = jl_get_global(jl_core_module,jl_symbol("Signed"));
}
#ifdef LLVM32
Attributes::AttrVal av;
if (jl_signed_type && jl_subtype(tti, jl_signed_type, 0))
av = Attributes::SExt;
else
av = Attributes::ZExt;
attrs.push_back(AttributeWithIndex::get(getGlobalContext(), i+1,
ArrayRef<Attributes::AttrVal>(&av, 1)));
#else
Attribute::AttrConst av;
if (jl_signed_type && jl_subtype(tti, jl_signed_type, 0))
av = Attribute::SExt;
else
av = Attribute::ZExt;
attrs.push_back(AttributeWithIndex::get(i+1, av));
#endif
}
}
Type *t = julia_type_to_llvm(tti);
if (t == NULL) {
JL_GC_POP();
return literal_pointer_val(jl_nothing);
}
fargt.push_back(t);
if (!isVa)
fargt_sig.push_back(t);
}
// check for calling convention specifier
CallingConv::ID cc = CallingConv::C;
jl_value_t *last = args[nargs];
if (jl_is_expr(last)) {
jl_sym_t *lhd = ((jl_expr_t*)last)->head;
if (lhd == jl_symbol("stdcall")) {
cc = CallingConv::X86_StdCall;
nargs--;
}
else if (lhd == jl_symbol("cdecl")) {
cc = CallingConv::C;
nargs--;
}
else if (lhd == jl_symbol("fastcall")) {
cc = CallingConv::X86_FastCall;
nargs--;
}
else if (lhd == jl_symbol("thiscall")) {
cc = CallingConv::X86_ThisCall;
nargs--;
}
}
if ((!isVa && jl_tuple_len(tt) != (nargs-2)/2) ||
( isVa && jl_tuple_len(tt)-1 > (nargs-2)/2))
jl_error("ccall: wrong number of arguments to C function");
// some special functions
if (fptr == &jl_array_ptr) {
Value *ary = emit_expr(args[4], ctx);
JL_GC_POP();
return mark_julia_type(builder.CreateBitCast(emit_arrayptr(ary),lrt),
rt);
}
// see if there are & arguments
for(i=4; i < nargs+1; i+=2) {
jl_value_t *argi = args[i];
if (jl_is_expr(argi) && ((jl_expr_t*)argi)->head == amp_sym) {
haspointers = true;
break;
}
}
// make LLVM function object for the target
Value *llvmf;
FunctionType *functype = FunctionType::get(lrt, fargt_sig, isVa);
if (jl_ptr != NULL) {
null_pointer_check(jl_ptr,ctx);
Type *funcptype = PointerType::get(functype,0);
llvmf = builder.CreateIntToPtr(jl_ptr, funcptype);
} else if (fptr != NULL) {
Type *funcptype = PointerType::get(functype,0);
llvmf = literal_pointer_val(fptr, funcptype);
}
else {
void *symaddr;
if (f_lib != NULL)
symaddr = add_library_sym(f_name, f_lib);
else
symaddr = sys::DynamicLibrary::SearchForAddressOfSymbol(f_name);
if (symaddr == NULL) {
JL_GC_POP();
std::stringstream msg;
msg << "ccall: could not find function ";
msg << f_name;
if (f_lib != NULL) {
msg << " in library ";
msg << f_lib;
}
emit_error(msg.str(), ctx);
return literal_pointer_val(jl_nothing);
}
llvmf = jl_Module->getOrInsertFunction(f_name, functype);
}
// save temp argument area stack pointer
Value *saveloc=NULL;
Value *stacksave=NULL;
if (haspointers) {
// TODO: inline this
saveloc = builder.CreateCall(save_arg_area_loc_func);
stacksave =
builder.CreateCall(Intrinsic::getDeclaration(jl_Module,
Intrinsic::stacksave));
}
// emit arguments
Value *argvals[(nargs-3)/2];
int last_depth = ctx->argDepth;
int nargty = jl_tuple_len(tt);
for(i=4; i < nargs+1; i+=2) {
int ai = (i-4)/2;
jl_value_t *argi = args[i];
bool addressOf = false;
if (jl_is_expr(argi) && ((jl_expr_t*)argi)->head == amp_sym) {
addressOf = true;
argi = jl_exprarg(argi,0);
}
Type *largty;
jl_value_t *jargty;
if (isVa && ai >= nargty-1) {
largty = fargt[nargty-1];
jargty = jl_tparam0(jl_tupleref(tt,nargty-1));
}
else {
largty = fargt[ai];
jargty = jl_tupleref(tt,ai);
}
Value *arg;
if (largty == jl_pvalue_llvmt) {
arg = emit_expr(argi, ctx, true);
}
else {
arg = emit_unboxed(argi, ctx);
if (jl_is_bits_type(expr_type(argi, ctx))) {
if (addressOf)
arg = emit_unbox(largty->getContainedType(0), largty, arg);
else
arg = emit_unbox(largty, PointerType::get(largty,0), arg);
}
}
/*
#ifdef JL_GC_MARKSWEEP
// make sure args are rooted
if (largty->isPointerTy() &&
(largty == jl_pvalue_llvmt ||
!jl_is_bits_type(expr_type(args[i], ctx)))) {
make_gcroot(boxed(arg), ctx);
}
#endif
*/
argvals[ai] = julia_to_native(largty, jargty, arg, argi, addressOf,
ai+1, ctx);
}
// the actual call
Value *result = builder.CreateCall(llvmf,
ArrayRef<Value*>(&argvals[0],(nargs-3)/2));
if (cc != CallingConv::C)
((CallInst*)result)->setCallingConv(cc);
#ifdef LLVM32
((CallInst*)result)->setAttributes(AttrListPtr::get(getGlobalContext(), ArrayRef<AttributeWithIndex>(attrs)));
#else
((CallInst*)result)->setAttributes(AttrListPtr::get(attrs.data(),attrs.size()));
#endif
// restore temp argument area stack pointer
if (haspointers) {
assert(saveloc != NULL);
builder.CreateCall(restore_arg_area_loc_func, saveloc);
assert(stacksave != NULL);
builder.CreateCall(Intrinsic::getDeclaration(jl_Module,
Intrinsic::stackrestore),
stacksave);
}
ctx->argDepth = last_depth;
if (0) { // Enable this to turn on SSPREQ (-fstack-protector) on the function containing this ccall
#ifdef LLVM32
ctx->f->addFnAttr(Attributes::StackProtectReq);
#else
ctx->f->addFnAttr(Attribute::StackProtectReq);
#endif
}
JL_GC_POP();
if (lrt == T_void)
return literal_pointer_val((jl_value_t*)jl_nothing);
return mark_julia_type(result, rt);
}
// --- parse :sym or (:sym, :lib) argument into address info ---
static native_sym_arg_t interpret_symbol_arg(jl_value_t *arg, jl_codectx_t *ctx, const char *fname)
{
jl_value_t *ptr = NULL;
Value *jl_ptr=NULL;
ptr = static_eval(arg, ctx, true);
if (ptr == NULL) {
jl_value_t *ptr_ty = expr_type(arg, ctx);
Value *arg1 = emit_unboxed(arg, ctx);
if (!jl_is_cpointer_type(ptr_ty)) {
emit_cpointercheck(arg1,
!strcmp(fname,"ccall") ?
"ccall: first argument not a pointer or valid constant expression" :
"cglobal: first argument not a pointer or valid constant expression",
ctx);
}
jl_ptr = emit_unbox(T_size, arg1, (jl_value_t*)jl_voidpointer_type);
}
void *fptr=NULL;
char *f_name=NULL, *f_lib=NULL;
if (ptr != NULL) {
if (jl_is_tuple(ptr) && jl_tuple_len(ptr)==1) {
ptr = jl_tupleref(ptr,0);
}
if (jl_is_symbol(ptr))
f_name = ((jl_sym_t*)ptr)->name;
else if (jl_is_byte_string(ptr))
f_name = jl_string_data(ptr);
if (f_name != NULL) {
// just symbol, default to JuliaDLHandle
// will look in process symbol table
#ifdef _OS_WINDOWS_
f_lib = jl_dlfind_win32(f_name);
#endif
}
else if (jl_is_cpointer_type(jl_typeof(ptr))) {
fptr = *(void**)jl_data_ptr(ptr);
}
else if (jl_is_tuple(ptr) && jl_tuple_len(ptr)>1) {
jl_value_t *t0 = jl_tupleref(ptr,0);
jl_value_t *t1 = jl_tupleref(ptr,1);
if (jl_is_symbol(t0))
f_name = ((jl_sym_t*)t0)->name;
else if (jl_is_byte_string(t0))
f_name = jl_string_data(t0);
else
JL_TYPECHKS(fname, symbol, t0);
if (jl_is_symbol(t1))
f_lib = ((jl_sym_t*)t1)->name;
else if (jl_is_byte_string(t1))
f_lib = jl_string_data(t1);
else
JL_TYPECHKS(fname, symbol, t1);
}
else {
JL_TYPECHKS(fname, pointer, ptr);
}
}
native_sym_arg_t r;
r.jl_ptr = jl_ptr;
r.fptr = fptr;
r.f_name = f_name;
r.f_lib = f_lib;
return r;
}
static Value *julia_to_native(Type *ty, jl_value_t *jt, Value *jv,
jl_value_t *argex, bool addressOf,
int argn, jl_codectx_t *ctx,
bool *mightNeedTempSpace, bool *needStackRestore)
{
Type *vt = jv->getType();
if (ty == jl_pvalue_llvmt) {
return boxed(jv,ctx);
}
else if (ty == vt && !addressOf) {
return jv;
}
else if (vt != jl_pvalue_llvmt) {
// argument value is unboxed
if (addressOf) {
if (ty->isPointerTy() && ty->getContainedType(0)==vt) {
// pass the address of an alloca'd thing, not a box
// since those are immutable.
*needStackRestore = true;
Value *slot = builder.CreateAlloca(vt);
builder.CreateStore(jv, slot);
return builder.CreateBitCast(slot, ty);
}
}
else if ((vt->isIntegerTy() && ty->isIntegerTy()) ||
(vt->isFloatingPointTy() && ty->isFloatingPointTy()) ||
(vt->isPointerTy() && ty->isPointerTy())) {
if (vt->getPrimitiveSizeInBits() ==
ty->getPrimitiveSizeInBits()) {
return builder.CreateBitCast(jv, ty);
}
}
// error. box for error handling.
jv = boxed(jv,ctx);
}
else if (jl_is_cpointer_type(jt)) {
assert(ty->isPointerTy());
jl_value_t *aty = expr_type(argex, ctx);
if (jl_is_array_type(aty) &&
(jl_tparam0(jt) == jl_tparam0(aty) ||
jl_tparam0(jt) == (jl_value_t*)jl_bottom_type)) {
// array to pointer
return builder.CreateBitCast(emit_arrayptr(jv), ty);
}
if (aty == (jl_value_t*)jl_ascii_string_type || aty == (jl_value_t*)jl_utf8_string_type) {
return builder.CreateBitCast(emit_arrayptr(emit_nthptr(jv,1,tbaa_const)), ty);
}
if (jl_is_structtype(aty) && jl_is_leaf_type(aty) && !jl_is_array_type(aty)) {
if (!addressOf) {
emit_error("ccall: expected & on argument", ctx);
return literal_pointer_val(jl_nothing);
}
return builder.CreateBitCast(emit_nthptr_addr(jv, (size_t)1), ty); // skip type tag field
}
*mightNeedTempSpace = true;
Value *p = builder.CreateCall4(prepare_call(value_to_pointer_func),
literal_pointer_val(jl_tparam0(jt)), jv,
ConstantInt::get(T_int32, argn),
ConstantInt::get(T_int32, (int)addressOf));
return builder.CreateBitCast(p, ty);
}
else if (jl_is_structtype(jt)) {
if (addressOf)
jl_error("ccall: unexpected & on argument"); // the only "safe" thing to emit here is the expected struct
assert (ty->isStructTy() && (Type*)((jl_datatype_t*)jt)->struct_decl == ty);
jl_value_t *aty = expr_type(argex, ctx);
if (aty != jt) {
std::stringstream msg;
msg << "ccall argument ";
msg << argn;
emit_typecheck(jv, jt, msg.str(), ctx);
}
//TODO: check instead that prefix matches
//if (!jl_is_structtype(aty))
// emit_typecheck(emit_typeof(jv), (jl_value_t*)jl_struct_kind, "ccall: Struct argument called with something that isn't a struct", ctx);
// //safe thing would be to also check that jl_typeof(aty)->size > sizeof(ty) here and/or at runtime
Value *pjv = builder.CreateBitCast(emit_nthptr_addr(jv, (size_t)1), PointerType::get(ty,0));
return builder.CreateLoad(pjv, false);
}
else if (jl_is_tuple(jt)) {
return emit_unbox(ty,jv,jt);
}
// TODO: error for & with non-pointer argument type
assert(jl_is_bitstype(jt));
std::stringstream msg;
msg << "ccall argument ";
msg << argn;
emit_typecheck(jv, jt, msg.str(), ctx);
Value *p = data_pointer(jv);
return builder.CreateLoad(builder.CreateBitCast(p,
PointerType::get(ty,0)),
false);
}
// ccall(pointer, rettype, (argtypes...), args...)
static Value *emit_ccall(jl_value_t **args, size_t nargs, jl_codectx_t *ctx)
{
JL_NARGSV(ccall, 3);
jl_value_t *ptr=NULL, *rt=NULL, *at=NULL;
JL_GC_PUSH(&ptr, &rt, &at);
ptr = jl_interpret_toplevel_expr_in(ctx->module, args[1],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
rt = jl_interpret_toplevel_expr_in(ctx->module, args[2],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
if (jl_is_tuple(rt)) {
std::string msg = "in " + ctx->funcName +
": ccall: missing return type";
jl_error(msg.c_str());
}
at = jl_interpret_toplevel_expr_in(ctx->module, args[3],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
void *fptr=NULL;
char *f_name=NULL, *f_lib=NULL;
if (jl_is_tuple(ptr) && jl_tuple_len(ptr)==1) {
ptr = jl_tupleref(ptr,0);
}
if (jl_is_symbol(ptr))
f_name = ((jl_sym_t*)ptr)->name;
else if (jl_is_byte_string(ptr))
f_name = jl_string_data(ptr);
if (f_name != NULL) {
// just symbol, default to JuliaDLHandle
#ifdef __WIN32__
fptr = jl_dlsym_e(jl_dl_handle, f_name);
if (!fptr) {
fptr = jl_dlsym_e(jl_kernel32_handle, f_name);
if (!fptr) {
fptr = jl_dlsym_e(jl_ntdll_handle, f_name);
if (!fptr) {
fptr = jl_dlsym_e(jl_crtdll_handle, f_name);
if (!fptr) {
fptr = jl_dlsym(jl_winsock_handle, f_name);
}
}
}
}
else {
// available in process symbol table
fptr = NULL;
}
#else
// will look in process symbol table
#endif
}
else if (jl_is_cpointer_type(jl_typeof(ptr))) {
fptr = *(void**)jl_bits_data(ptr);
}
else if (jl_is_tuple(ptr) && jl_tuple_len(ptr)>1) {
jl_value_t *t0 = jl_tupleref(ptr,0);
jl_value_t *t1 = jl_tupleref(ptr,1);
if (jl_is_symbol(t0))
f_name = ((jl_sym_t*)t0)->name;
else if (jl_is_byte_string(t0))
f_name = jl_string_data(t0);
else
JL_TYPECHK(ccall, symbol, t0);
if (jl_is_symbol(t1))
f_lib = ((jl_sym_t*)t1)->name;
else if (jl_is_byte_string(t1))
f_lib = jl_string_data(t1);
else
JL_TYPECHK(ccall, symbol, t1);
}
else {
JL_TYPECHK(ccall, pointer, ptr);
}
if (f_name == NULL && fptr == NULL) {
JL_GC_POP();
emit_error("ccall: null function pointer", ctx);
return literal_pointer_val(jl_nothing);
}
JL_TYPECHK(ccall, type, rt);
JL_TYPECHK(ccall, tuple, at);
JL_TYPECHK(ccall, type, at);
jl_tuple_t *tt = (jl_tuple_t*)at;
std::vector<Type *> fargt(0);
std::vector<Type *> fargt_sig(0);
Type *lrt = julia_type_to_llvm(rt);
if (lrt == NULL) {
JL_GC_POP();
return literal_pointer_val(jl_nothing);
}
size_t i;
bool haspointers = false;
bool isVa = false;
for(i=0; i < jl_tuple_len(tt); i++) {
jl_value_t *tti = jl_tupleref(tt,i);
if (jl_is_seq_type(tti)) {
isVa = true;
tti = jl_tparam0(tti);
}
Type *t = julia_type_to_llvm(tti);
if (t == NULL) {
JL_GC_POP();
return literal_pointer_val(jl_nothing);
}
fargt.push_back(t);
if (!isVa)
fargt_sig.push_back(t);
}
// check for calling convention specifier
CallingConv::ID cc = CallingConv::C;
jl_value_t *last = args[nargs];
if (jl_is_expr(last)) {
jl_sym_t *lhd = ((jl_expr_t*)last)->head;
if (lhd == jl_symbol("stdcall")) {
cc = CallingConv::X86_StdCall;
nargs--;
}
else if (lhd == jl_symbol("cdecl")) {
cc = CallingConv::C;
nargs--;
}
else if (lhd == jl_symbol("fastcall")) {
cc = CallingConv::X86_FastCall;
nargs--;
}
}
if ((!isVa && jl_tuple_len(tt) != (nargs-2)/2) ||
( isVa && jl_tuple_len(tt)-1 > (nargs-2)/2))
jl_error("ccall: wrong number of arguments to C function");
// some special functions
if (fptr == &jl_array_ptr) {
Value *ary = emit_expr(args[4], ctx);
JL_GC_POP();
return mark_julia_type(builder.CreateBitCast(emit_arrayptr(ary),lrt),
rt);
}
// see if there are & arguments
for(i=4; i < nargs+1; i+=2) {
jl_value_t *argi = args[i];
if (jl_is_expr(argi) && ((jl_expr_t*)argi)->head == amp_sym) {
haspointers = true;
break;
}
}
// make LLVM function object for the target
Constant *llvmf;
FunctionType *functype = FunctionType::get(lrt, fargt_sig, isVa);
if (fptr != NULL) {
Type *funcptype = PointerType::get(functype,0);
llvmf = ConstantExpr::getIntToPtr(
ConstantInt::get(funcptype, (uint64_t)fptr),
funcptype);
}
else {
if (f_lib != NULL)
add_library_sym(f_name, f_lib);
llvmf = jl_Module->getOrInsertFunction(f_name, functype);
}
// save temp argument area stack pointer
Value *saveloc=NULL;
Value *stacksave=NULL;
if (haspointers) {
// TODO: inline this
saveloc = builder.CreateCall(save_arg_area_loc_func);
stacksave =
builder.CreateCall(Intrinsic::getDeclaration(jl_Module,
Intrinsic::stacksave));
}
// emit arguments
Value *argvals[(nargs-3)/2];
int last_depth = ctx->argDepth;
int nargty = jl_tuple_len(tt);
for(i=4; i < nargs+1; i+=2) {
int ai = (i-4)/2;
jl_value_t *argi = args[i];
bool addressOf = false;
if (jl_is_expr(argi) && ((jl_expr_t*)argi)->head == amp_sym) {
addressOf = true;
argi = jl_exprarg(argi,0);
}
Type *largty;
jl_value_t *jargty;
if (isVa && ai >= nargty-1) {
largty = fargt[nargty-1];
jargty = jl_tparam0(jl_tupleref(tt,nargty-1));
}
else {
largty = fargt[ai];
jargty = jl_tupleref(tt,ai);
}
Value *arg;
if (largty == jl_pvalue_llvmt) {
arg = emit_expr(argi, ctx, true);
}
else {
arg = emit_unboxed(argi, ctx);
if (jl_is_bits_type(expr_type(argi, ctx))) {
if (addressOf)
arg = emit_unbox(largty->getContainedType(0), largty, arg);
else
arg = emit_unbox(largty, PointerType::get(largty,0), arg);
}
}
/*
#ifdef JL_GC_MARKSWEEP
// make sure args are rooted
if (largty->isPointerTy() &&
(largty == jl_pvalue_llvmt ||
!jl_is_bits_type(expr_type(args[i], ctx)))) {
make_gcroot(boxed(arg), ctx);
}
#endif
*/
argvals[ai] = julia_to_native(largty, jargty, arg, argi, addressOf,
ai+1, ctx);
}
// the actual call
Value *result = builder.CreateCall(llvmf,
ArrayRef<Value*>(&argvals[0],(nargs-3)/2));
if (cc != CallingConv::C)
((CallInst*)result)->setCallingConv(cc);
// restore temp argument area stack pointer
if (haspointers) {
assert(saveloc != NULL);
builder.CreateCall(restore_arg_area_loc_func, saveloc);
assert(stacksave != NULL);
builder.CreateCall(Intrinsic::getDeclaration(jl_Module,
Intrinsic::stackrestore),
stacksave);
}
ctx->argDepth = last_depth;
if (0) { // Enable this to turn on SSPREQ (-fstack-protector) on the function containing this ccall
ctx->f->addFnAttr(Attribute::StackProtectReq);
}
JL_GC_POP();
if (lrt == T_void)
return literal_pointer_val((jl_value_t*)jl_nothing);
return mark_julia_type(result, rt);
}
// ccall(pointer, rettype, (argtypes...), args...)
static Value *emit_ccall(jl_value_t **args, size_t nargs, jl_codectx_t *ctx)
{
JL_NARGSV(ccall, 3);
jl_value_t *rt=NULL, *at=NULL;
JL_GC_PUSH2(&rt, &at);
native_sym_arg_t symarg = interpret_symbol_arg(args[1], ctx, "ccall");
Value *jl_ptr=NULL;
void *fptr = NULL;
char *f_name = NULL, *f_lib = NULL;
jl_ptr = symarg.jl_ptr;
fptr = symarg.fptr;
f_name = symarg.f_name;
f_lib = symarg.f_lib;
if (f_name == NULL && fptr == NULL && jl_ptr == NULL) {
JL_GC_POP();
emit_error("ccall: null function pointer", ctx);
return literal_pointer_val(jl_nothing);
}
rt = jl_interpret_toplevel_expr_in(ctx->module, args[2],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
if (jl_is_tuple(rt)) {
std::string msg = "in " + ctx->funcName +
": ccall: missing return type";
jl_error(msg.c_str());
}
if (rt == (jl_value_t*)jl_pointer_type)
jl_error("ccall: return type Ptr should have an element type, Ptr{T}");
at = jl_interpret_toplevel_expr_in(ctx->module, args[3],
&jl_tupleref(ctx->sp,0),
jl_tuple_len(ctx->sp)/2);
JL_TYPECHK(ccall, type, rt);
JL_TYPECHK(ccall, tuple, at);
JL_TYPECHK(ccall, type, at);
jl_tuple_t *tt = (jl_tuple_t*)at;
std::vector<Type *> fargt(0);
std::vector<Type *> fargt_sig(0);
Type *lrt = julia_struct_to_llvm(rt);
if (lrt == NULL) {
JL_GC_POP();
emit_error("ccall: return type doesn't correspond to a C type", ctx);
return literal_pointer_val(jl_nothing);
}
size_t i;
bool isVa = false;
size_t nargt = jl_tuple_len(tt);
std::vector<AttributeWithIndex> attrs;
for(i=0; i < nargt; i++) {
jl_value_t *tti = jl_tupleref(tt,i);
if (tti == (jl_value_t*)jl_pointer_type)
jl_error("ccall: argument type Ptr should have an element type, Ptr{T}");
if (jl_is_vararg_type(tti)) {
isVa = true;
tti = jl_tparam0(tti);
}
if (jl_is_bitstype(tti)) {
// see pull req #978. need to annotate signext/zeroext for
// small integer arguments.
jl_datatype_t *bt = (jl_datatype_t*)tti;
if (bt->size < 4) {
if (jl_signed_type == NULL) {
jl_signed_type = jl_get_global(jl_core_module,jl_symbol("Signed"));
}
#ifdef LLVM32
Attributes::AttrVal av;
if (jl_signed_type && jl_subtype(tti, jl_signed_type, 0))
av = Attributes::SExt;
else
av = Attributes::ZExt;
attrs.push_back(AttributeWithIndex::get(getGlobalContext(), i+1,
ArrayRef<Attributes::AttrVal>(&av, 1)));
#else
Attribute::AttrConst av;
if (jl_signed_type && jl_subtype(tti, jl_signed_type, 0))
av = Attribute::SExt;
else
av = Attribute::ZExt;
attrs.push_back(AttributeWithIndex::get(i+1, av));
#endif
}
}
Type *t = julia_struct_to_llvm(tti);
if (t == NULL) {
JL_GC_POP();
std::stringstream msg;
msg << "ccall: the type of argument ";
msg << i+1;
msg << " doesn't correspond to a C type";
emit_error(msg.str(), ctx);
return literal_pointer_val(jl_nothing);
}
fargt.push_back(t);
if (!isVa)
fargt_sig.push_back(t);
}
// check for calling convention specifier
CallingConv::ID cc = CallingConv::C;
jl_value_t *last = args[nargs];
if (jl_is_expr(last)) {
jl_sym_t *lhd = ((jl_expr_t*)last)->head;
if (lhd == jl_symbol("stdcall")) {
cc = CallingConv::X86_StdCall;
nargs--;
}
else if (lhd == jl_symbol("cdecl")) {
cc = CallingConv::C;
nargs--;
}
else if (lhd == jl_symbol("fastcall")) {
cc = CallingConv::X86_FastCall;
nargs--;
}
else if (lhd == jl_symbol("thiscall")) {
cc = CallingConv::X86_ThisCall;
nargs--;
}
}
if ((!isVa && jl_tuple_len(tt) != (nargs-2)/2) ||
( isVa && jl_tuple_len(tt)-1 > (nargs-2)/2))
jl_error("ccall: wrong number of arguments to C function");
// some special functions
if (fptr == &jl_array_ptr) {
assert(lrt->isPointerTy());
Value *ary = emit_expr(args[4], ctx);
JL_GC_POP();
return mark_julia_type(builder.CreateBitCast(emit_arrayptr(ary),lrt),
rt);
}
if (fptr == &jl_value_ptr) {
assert(lrt->isPointerTy());
jl_value_t *argi = args[4];
bool addressOf = false;
if (jl_is_expr(argi) && ((jl_expr_t*)argi)->head == amp_sym) {
addressOf = true;
argi = jl_exprarg(argi,0);
}
Value *ary = boxed(emit_expr(argi, ctx));
JL_GC_POP();
return mark_julia_type(
builder.CreateBitCast(emit_nthptr_addr(ary, addressOf?1:0),lrt),
rt);
}
// make LLVM function object for the target
Value *llvmf;
FunctionType *functype = FunctionType::get(lrt, fargt_sig, isVa);
if (jl_ptr != NULL) {
null_pointer_check(jl_ptr,ctx);
Type *funcptype = PointerType::get(functype,0);
llvmf = builder.CreateIntToPtr(jl_ptr, funcptype);
}
else if (fptr != NULL) {
Type *funcptype = PointerType::get(functype,0);
llvmf = literal_pointer_val(fptr, funcptype);
}
else {
void *symaddr;
if (f_lib != NULL)
symaddr = add_library_sym(f_name, f_lib);
else
symaddr = sys::DynamicLibrary::SearchForAddressOfSymbol(f_name);
if (symaddr == NULL) {
JL_GC_POP();
std::stringstream msg;
msg << "ccall: could not find function ";
msg << f_name;
if (f_lib != NULL) {
msg << " in library ";
msg << f_lib;
}
emit_error(msg.str(), ctx);
return literal_pointer_val(jl_nothing);
}
llvmf = jl_Module->getOrInsertFunction(f_name, functype);
}
// save place before arguments, for possible insertion of temp arg
// area saving code.
Value *saveloc=NULL;
Value *stacksave=NULL;
BasicBlock::InstListType &instList = builder.GetInsertBlock()->getInstList();
Instruction *savespot;
if (instList.empty()) {
savespot = NULL;
}
else {
// hey C++, there's this thing called pointers...
Instruction &_savespot = builder.GetInsertBlock()->back();
savespot = &_savespot;
}
// emit arguments
Value *argvals[(nargs-3)/2];
int last_depth = ctx->argDepth;
int nargty = jl_tuple_len(tt);
bool needTempSpace = false;
for(i=4; i < nargs+1; i+=2) {
int ai = (i-4)/2;
jl_value_t *argi = args[i];
bool addressOf = false;
if (jl_is_expr(argi) && ((jl_expr_t*)argi)->head == amp_sym) {
addressOf = true;
argi = jl_exprarg(argi,0);
}
Type *largty;
jl_value_t *jargty;
if (isVa && ai >= nargty-1) {
largty = fargt[nargty-1];
jargty = jl_tparam0(jl_tupleref(tt,nargty-1));
}
else {
largty = fargt[ai];
jargty = jl_tupleref(tt,ai);
}
Value *arg;
if (largty == jl_pvalue_llvmt ||
largty->isStructTy()) {
arg = emit_expr(argi, ctx, true);
}
else {
arg = emit_unboxed(argi, ctx);
if (jl_is_bitstype(expr_type(argi, ctx))) {
if (addressOf)
arg = emit_unbox(largty->getContainedType(0), largty, arg);
else
arg = emit_unbox(largty, PointerType::get(largty,0), arg);
}
}
/*
#ifdef JL_GC_MARKSWEEP
// make sure args are rooted
if (largty->isPointerTy() &&
(largty == jl_pvalue_llvmt ||
!jl_is_bits_type(expr_type(args[i], ctx)))) {
make_gcroot(boxed(arg), ctx);
}
#endif
*/
bool mightNeed=false;
argvals[ai] = julia_to_native(largty, jargty, arg, argi, addressOf,
ai+1, ctx, &mightNeed);
needTempSpace |= mightNeed;
}
if (needTempSpace) {
// save temp argument area stack pointer
// TODO: inline this
saveloc = CallInst::Create(save_arg_area_loc_func);
stacksave = CallInst::Create(Intrinsic::getDeclaration(jl_Module,
Intrinsic::stacksave));
if (savespot)
instList.insertAfter(savespot, (Instruction*)saveloc);
else
instList.push_front((Instruction*)saveloc);
instList.insertAfter((Instruction*)saveloc, (Instruction*)stacksave);
}
// the actual call
Value *result = builder.CreateCall(llvmf,
ArrayRef<Value*>(&argvals[0],(nargs-3)/2));
if (cc != CallingConv::C)
((CallInst*)result)->setCallingConv(cc);
#ifdef LLVM32
((CallInst*)result)->setAttributes(AttrListPtr::get(getGlobalContext(), ArrayRef<AttributeWithIndex>(attrs)));
#else
((CallInst*)result)->setAttributes(AttrListPtr::get(attrs.data(),attrs.size()));
#endif
if (needTempSpace) {
// restore temp argument area stack pointer
assert(saveloc != NULL);
builder.CreateCall(restore_arg_area_loc_func, saveloc);
assert(stacksave != NULL);
builder.CreateCall(Intrinsic::getDeclaration(jl_Module,
Intrinsic::stackrestore),
stacksave);
}
ctx->argDepth = last_depth;
if (0) { // Enable this to turn on SSPREQ (-fstack-protector) on the function containing this ccall
#ifdef LLVM32
ctx->f->addFnAttr(Attributes::StackProtectReq);
#else
ctx->f->addFnAttr(Attribute::StackProtectReq);
#endif
}
JL_GC_POP();
if (lrt == T_void)
return literal_pointer_val((jl_value_t*)jl_nothing);
if (lrt->isStructTy()) {
//fprintf(stderr, "ccall rt: %s -> %s\n", f_name, ((jl_tag_type_t*)rt)->name->name->name);
assert(jl_is_structtype(rt));
Value *strct =
builder.CreateCall(jlallocobj_func,
ConstantInt::get(T_size,
sizeof(void*)+((jl_datatype_t*)rt)->size));
builder.CreateStore(literal_pointer_val((jl_value_t*)rt),
emit_nthptr_addr(strct, (size_t)0));
builder.CreateStore(result,
builder.CreateBitCast(
emit_nthptr_addr(strct, (size_t)1),
PointerType::get(lrt,0)));
return mark_julia_type(strct, rt);
}
return mark_julia_type(result, rt);
}
static Value *julia_to_native(Type *ty, jl_value_t *jt, Value *jv,
jl_value_t *aty, bool addressOf,
bool byRef, bool inReg,
bool needCopy,
int argn, jl_codectx_t *ctx,
bool *needStackRestore)
{
Type *vt = jv->getType();
// We're passing any
if (ty == jl_pvalue_llvmt) {
return boxed(jv,ctx);
}
if (ty == vt && !addressOf && !byRef) {
return jv;
}
if (vt != jl_pvalue_llvmt) {
// argument value is unboxed
if (addressOf || (byRef && inReg)) {
if (ty->isPointerTy() && ty->getContainedType(0)==vt) {
// pass the address of an alloca'd thing, not a box
// since those are immutable.
*needStackRestore = true;
Value *slot = builder.CreateAlloca(vt);
builder.CreateStore(jv, slot);
return builder.CreateBitCast(slot, ty);
}
}
else if ((vt->isIntegerTy() && ty->isIntegerTy()) ||
(vt->isFloatingPointTy() && ty->isFloatingPointTy()) ||
(vt->isPointerTy() && ty->isPointerTy())) {
if (vt->getPrimitiveSizeInBits() ==
ty->getPrimitiveSizeInBits()) {
if (!byRef) {
return builder.CreateBitCast(jv, ty);
}
else {
*needStackRestore = true;
Value *mem = builder.CreateAlloca(ty);
builder.CreateStore(jv,builder.CreateBitCast(mem,vt->getPointerTo()));
return mem;
}
}
}
else if (vt->isStructTy()) {
if (!byRef) {
return jv;
}
else {
*needStackRestore = true;
Value *mem = builder.CreateAlloca(vt);
builder.CreateStore(jv,mem);
return mem;
}
}
emit_error("ccall: argument type did not match declaration", ctx);
}
if (jl_is_tuple(jt)) {
return emit_unbox(ty,jv,jt);
}
if (jl_is_cpointer_type(jt) && addressOf) {
assert(ty->isPointerTy());
jl_value_t *ety = jl_tparam0(jt);
if (aty != ety && ety != (jl_value_t*)jl_any_type && jt != (jl_value_t*)jl_voidpointer_type) {
std::stringstream msg;
msg << "ccall argument ";
msg << argn;
emit_typecheck(jv, ety, msg.str(), ctx);
}
if (jl_is_mutable_datatype(ety)) {
// no copy, just reference the data field
return builder.CreateBitCast(jv, ty);
}
else if (jl_is_immutable_datatype(ety) && jt != (jl_value_t*)jl_voidpointer_type) {
// yes copy
Value *nbytes;
if (jl_is_leaf_type(ety))
nbytes = ConstantInt::get(T_int32, jl_datatype_size(ety));
else
nbytes = tbaa_decorate(tbaa_datatype, builder.CreateLoad(
builder.CreateGEP(builder.CreatePointerCast(emit_typeof(jv), T_pint32),
ConstantInt::get(T_size, offsetof(jl_datatype_t,size)/sizeof(int32_t))),
false));
*needStackRestore = true;
AllocaInst *ai = builder.CreateAlloca(T_int8, nbytes);
ai->setAlignment(16);
builder.CreateMemCpy(ai, builder.CreateBitCast(jv, T_pint8), nbytes, 1);
return builder.CreateBitCast(ai, ty);
}
// emit maybe copy
*needStackRestore = true;
Value *jvt = emit_typeof(jv);
BasicBlock *mutableBB = BasicBlock::Create(getGlobalContext(),"is-mutable",ctx->f);
BasicBlock *immutableBB = BasicBlock::Create(getGlobalContext(),"is-immutable",ctx->f);
BasicBlock *afterBB = BasicBlock::Create(getGlobalContext(),"after",ctx->f);
Value *ismutable = builder.CreateTrunc(
tbaa_decorate(tbaa_datatype, builder.CreateLoad(
builder.CreateGEP(builder.CreatePointerCast(jvt, T_pint8),
ConstantInt::get(T_size, offsetof(jl_datatype_t,mutabl))),
false)),
T_int1);
builder.CreateCondBr(ismutable, mutableBB, immutableBB);
builder.SetInsertPoint(mutableBB);
Value *p1 = builder.CreatePointerCast(jv, ty);
builder.CreateBr(afterBB);
builder.SetInsertPoint(immutableBB);
Value *nbytes = tbaa_decorate(tbaa_datatype, builder.CreateLoad(
builder.CreateGEP(builder.CreatePointerCast(jvt, T_pint32),
ConstantInt::get(T_size, offsetof(jl_datatype_t,size)/sizeof(int32_t))),
false));
AllocaInst *ai = builder.CreateAlloca(T_int8, nbytes);
ai->setAlignment(16);
builder.CreateMemCpy(ai, builder.CreatePointerCast(jv, T_pint8), nbytes, 1);
Value *p2 = builder.CreatePointerCast(ai, ty);
builder.CreateBr(afterBB);
builder.SetInsertPoint(afterBB);
PHINode *p = builder.CreatePHI(ty, 2);
p->addIncoming(p1, mutableBB);
p->addIncoming(p2, immutableBB);
return p;
}
if (addressOf)
jl_error("ccall: unexpected & on argument"); // the only "safe" thing to emit here is the expected struct
assert(jl_is_datatype(jt));
if (aty != jt) {
std::stringstream msg;
msg << "ccall argument ";
msg << argn;
emit_typecheck(jv, jt, msg.str(), ctx);
}
Value *p = data_pointer(jv);
Value *pjv = builder.CreatePointerCast(p, PointerType::get(ty,0));
if (byRef) {
if (!needCopy) {
return pjv;
}
else {
*needStackRestore = true;
Value *mem = builder.CreateAlloca(ty);
builder.CreateMemCpy(mem,pjv,(uint64_t)jl_datatype_size(jt),(uint64_t)((jl_datatype_t*)jt)->alignment);
return mem;
}
}
else {
return builder.CreateLoad(pjv,false);
}
}
