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ccall.cpp
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ccall.cpp
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// --- the ccall intrinsic ---
// --- library symbol lookup ---
// map from "libX" to full soname "libX.so.ver"
#if defined(__linux__) || defined(__FreeBSD__)
static std::map<std::string, std::string> sonameMap;
static bool got_sonames = false;
extern "C" DLLEXPORT void jl_read_sonames(void)
{
char *line=NULL;
size_t sz=0;
#if defined(__linux__)
FILE *ldc = popen("/sbin/ldconfig -p", "r");
#else
FILE *ldc = popen("/sbin/ldconfig -r", "r");
#endif
while (!feof(ldc)) {
ssize_t n = getline(&line, &sz, ldc);
if (n == -1)
break;
if (n > 2 && isspace((unsigned char)line[0])) {
#ifdef __linux__
int i = 0;
while (isspace((unsigned char)line[++i])) ;
char *name = &line[i];
char *dot = strstr(name, ".so");
i = 0;
#else
char *name = strstr(line, ":-l");
if (name == NULL) continue;
strncpy(name, "lib", 3);
char *dot = strchr(name, '.');
#endif
if (NULL == dot)
continue;
#ifdef __linux__
// Detect if this entry is for the current architecture
while (!isspace((unsigned char)dot[++i])) ;
while (isspace((unsigned char)dot[++i])) ;
int j = i;
while (!isspace((unsigned char)dot[++j])) ;
char *arch = strstr(dot+i,"x86-64");
if (arch != NULL && arch < dot + j) {
#ifdef _P32
continue;
#endif
}
else {
#ifdef _P64
continue;
#endif
}
#endif // __linux__
char *abslibpath = strrchr(line, ' ');
if (dot != NULL && abslibpath != NULL) {
std::string pfx(name, dot - name);
// Do not include ' ' in front and '\n' at the end
std::string soname(abslibpath+1, line+n-(abslibpath+1)-1);
sonameMap[pfx] = soname;
}
}
}
free(line);
pclose(ldc);
}
extern "C" DLLEXPORT const char *jl_lookup_soname(const char *pfx, size_t n)
{
if (!got_sonames) {
jl_read_sonames();
got_sonames = true;
}
std::string str(pfx, n);
if (sonameMap.find(str) != sonameMap.end()) {
return sonameMap[str].c_str();
}
return NULL;
}
#endif
// map from user-specified lib names to handles
static std::map<std::string, uv_lib_t*> libMap;
static uv_lib_t *get_library(char *lib)
{
uv_lib_t *hnd;
#ifdef _OS_WINDOWS_
if ((intptr_t)lib == 1)
return jl_exe_handle;
if ((intptr_t)lib == 2)
return jl_dl_handle;
#endif
if (lib == NULL)
return jl_RTLD_DEFAULT_handle;
hnd = libMap[lib];
if (hnd != NULL)
return hnd;
hnd = (uv_lib_t *) jl_load_dynamic_library(lib, JL_RTLD_DEFAULT);
if (hnd != NULL)
libMap[lib] = hnd;
return hnd;
}
extern "C" DLLEXPORT
void *jl_load_and_lookup(char *f_lib, char *f_name, uv_lib_t **hnd)
{
uv_lib_t *handle = *hnd;
if (!handle)
*hnd = handle = get_library(f_lib);
void *ptr = jl_dlsym_e(handle, f_name);
if (!ptr)
jl_errorf("symbol could not be found %s: %s\n", f_name, uv_dlerror(handle));
return ptr;
}
static std::map<std::string, GlobalVariable*> libMapGV;
static std::map<std::string, GlobalVariable*> symMapGV;
static Value *runtime_sym_lookup(PointerType *funcptype, char *f_lib, char *f_name, jl_codectx_t *ctx)
{
// in pseudo-code, this function emits the following:
// global uv_lib_t **libptrgv
// global void **llvmgv
// if (*llvmgv == NULL) {
// *llvmgv = jl_load_and_lookup(f_lib, f_name, libptrgv);
// }
// return (*llvmgv)
Constant *initnul = ConstantPointerNull::get((PointerType*)T_pint8);
uv_lib_t *libsym = NULL;
bool runtime_lib = false;
GlobalVariable *libptrgv;
#ifdef _OS_WINDOWS_
if ((intptr_t)f_lib == 1) {
libptrgv = prepare_global(jlexe_var);
libsym = jl_exe_handle;
}
else if ((intptr_t)f_lib == 2) {
libptrgv = prepare_global(jldll_var);
libsym = jl_dl_handle;
}
else
#endif
if (f_lib == NULL) {
libptrgv = prepare_global(jlRTLD_DEFAULT_var);
libsym = jl_RTLD_DEFAULT_handle;
}
else {
runtime_lib = true;
libptrgv = libMapGV[f_lib];
if (libptrgv == NULL) {
libptrgv = new GlobalVariable(*jl_Module, T_pint8,
false, GlobalVariable::PrivateLinkage,
initnul, f_lib);
libMapGV[f_lib] = libptrgv;
libsym = get_library(f_lib);
assert(libsym != NULL);
#ifdef USE_MCJIT
llvm_to_jl_value[libptrgv] = libsym;
#else
*((uv_lib_t**)jl_ExecutionEngine->getPointerToGlobal(libptrgv)) = libsym;
#endif
}
}
if (libsym == NULL) {
#ifdef USE_MCJIT
libsym = (uv_lib_t*)llvm_to_jl_value[libptrgv];
#else
libsym = *((uv_lib_t**)jl_ExecutionEngine->getPointerToGlobal(libptrgv));
#endif
}
assert(libsym != NULL);
GlobalVariable *llvmgv = symMapGV[f_name];
if (llvmgv == NULL) {
// MCJIT forces this to have external linkage eventually, so we would clobber
// the symbol of the actual function.
std::string name = f_name;
name = "ccall_" + name;
llvmgv = new GlobalVariable(*jl_Module, T_pint8,
false, GlobalVariable::PrivateLinkage,
initnul, name);
symMapGV[f_name] = llvmgv;
#ifdef USE_MCJIT
llvm_to_jl_value[llvmgv] = jl_dlsym_e(libsym, f_name);
#else
*((void**)jl_ExecutionEngine->getPointerToGlobal(llvmgv)) = jl_dlsym_e(libsym, f_name);
#endif
}
BasicBlock *dlsym_lookup = BasicBlock::Create(getGlobalContext(), "dlsym"),
*ccall_bb = BasicBlock::Create(getGlobalContext(), "ccall");
builder.CreateCondBr(builder.CreateICmpNE(builder.CreateLoad(llvmgv), initnul), ccall_bb, dlsym_lookup);
ctx->f->getBasicBlockList().push_back(dlsym_lookup);
builder.SetInsertPoint(dlsym_lookup);
Value *libname;
if (runtime_lib) {
libname = builder.CreateGlobalStringPtr(f_lib);
}
else {
libname = literal_static_pointer_val(f_lib, T_pint8);
}
Value *llvmf = builder.CreateCall3(prepare_call(jldlsym_func), libname, builder.CreateGlobalStringPtr(f_name), libptrgv);
builder.CreateStore(llvmf, llvmgv);
builder.CreateBr(ccall_bb);
ctx->f->getBasicBlockList().push_back(ccall_bb);
builder.SetInsertPoint(ccall_bb);
llvmf = builder.CreateLoad(llvmgv);
return builder.CreatePointerCast(llvmf,funcptype);
}
// --- argument passing and scratch space utilities ---
static Function *value_to_pointer_func;
// TODO: per-thread
static char *temp_arg_area;
static const uint32_t arg_area_sz = 4196;
static uint32_t arg_area_loc;
#define N_TEMP_ARG_BLOCKS 1024
static void *temp_arg_blocks[N_TEMP_ARG_BLOCKS];
static uint32_t arg_block_n = 0;
static Function *save_arg_area_loc_func;
static Function *restore_arg_area_loc_func;
extern "C" DLLEXPORT uint64_t save_arg_area_loc()
{
return (((uint64_t)arg_block_n)<<32) | ((uint64_t)arg_area_loc);
}
extern "C" DLLEXPORT void restore_arg_area_loc(uint64_t l)
{
arg_area_loc = l&0xffffffff;
uint32_t ab = l>>32;
while (arg_block_n > ab) {
arg_block_n--;
free(temp_arg_blocks[arg_block_n]);
}
}
static void *alloc_temp_arg_space(uint32_t sz)
{
void *p;
if (arg_area_loc+sz > arg_area_sz) {
#ifdef JL_GC_MARKSWEEP
if (arg_block_n >= N_TEMP_ARG_BLOCKS)
jl_error("internal compiler error: out of temporary argument space in ccall");
p = malloc(sz);
temp_arg_blocks[arg_block_n++] = p;
#else
#error "fixme"
#endif
}
else {
p = &temp_arg_area[arg_area_loc];
arg_area_loc += sz;
}
return p;
}
static void *alloc_temp_arg_copy(void *obj, uint32_t sz)
{
void *p = alloc_temp_arg_space(sz);
memcpy(p, obj, sz);
return p;
}
// this is a run-time function
// warning: cannot allocate memory except using alloc_temp_arg_space
extern "C" DLLEXPORT void *jl_value_to_pointer(jl_value_t *jt, jl_value_t *v, int argn,
int addressof)
{
jl_value_t *jvt = (jl_value_t*)jl_typeof(v);
if (addressof) {
if (jvt == jt) {
if (jl_is_bitstype(jvt)) {
size_t osz = jl_datatype_size(jt);
return alloc_temp_arg_copy(jl_data_ptr(v), osz);
}
else if (!jl_is_tuple(jvt) && jl_is_leaf_type(jvt) && !jl_is_array_type(jvt)) {
return v + 1;
}
}
goto value_to_pointer_error;
}
else {
if (jl_is_cpointer_type(jvt) && jl_tparam0(jvt) == jt) {
return (void*)jl_unbox_voidpointer(v);
}
}
if (((jl_value_t*)jl_uint8_type == jt ||
(jl_value_t*)jl_int8_type == jt) && jl_is_byte_string(v)) {
return jl_string_data(v);
}
if (jl_is_array_type(jvt)) {
if (jl_tparam0(jl_typeof(v)) == jt || jt == (jl_value_t*)jl_bottom_type ||
jt == (jl_value_t*)jl_void_type) {
return ((jl_array_t*)v)->data;
}
if (jl_is_cpointer_type(jt)) {
jl_array_t *ar = (jl_array_t*)v;
void **temp=(void**)alloc_temp_arg_space((1+jl_array_len(ar))*sizeof(void*));
size_t i;
for(i=0; i < jl_array_len(ar); i++) {
temp[i] = jl_value_to_pointer(jl_tparam0(jt),
jl_arrayref(ar, i), argn, 0);
}
temp[i] = 0;
return temp;
}
}
value_to_pointer_error:
std::map<int, std::string>::iterator it = argNumberStrings.find(argn);
if (it == argNumberStrings.end()) {
std::stringstream msg;
msg << "argument ";
msg << argn;
argNumberStrings[argn] = msg.str();
it = argNumberStrings.find(argn);
}
jl_value_t *targ=NULL, *pty=NULL;
JL_GC_PUSH2(&targ, &pty);
targ = (jl_value_t*)jl_tuple1(jt);
pty = (jl_value_t*)jl_apply_type((jl_value_t*)jl_pointer_type,
(jl_tuple_t*)targ);
jl_type_error_rt("ccall", (*it).second.c_str(), pty, v);
// doesn't return
return (jl_value_t*)jl_null;
}
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 ||
jl_tparam0(jt) == (jl_value_t*)jl_void_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);
}
static jl_value_t *jl_signed_type=NULL;
typedef struct {
Value *jl_ptr; // if the argument is a run-time computed pointer
void *fptr; // if the argument is a constant pointer
char *f_name; // if the symbol name is known
char *f_lib; // if a library name is specified
} native_sym_arg_t;
// --- 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;
}
#ifdef LLVM33
typedef AttributeSet attr_type;
#else
typedef AttrListPtr attr_type;
#endif
// --- code generator for cglobal ---
static Value *emit_cglobal(jl_value_t **args, size_t nargs, jl_codectx_t *ctx)
{
JL_NARGS(cglobal, 1, 2);
jl_value_t *rt=NULL;
Value *res;
JL_GC_PUSH1(&rt);
if (nargs == 2) {
JL_TRY {
rt = jl_interpret_toplevel_expr_in(ctx->module, args[2],
jl_tuple_data(ctx->sp),
jl_tuple_len(ctx->sp)/2);
}
JL_CATCH {
jl_rethrow_with_add("error interpreting cglobal type");
}
JL_TYPECHK(cglobal, type, rt);
rt = (jl_value_t*)jl_apply_type((jl_value_t*)jl_pointer_type, jl_tuple1(rt));
}
else {
rt = (jl_value_t*)jl_voidpointer_type;
}
Type *lrt = julia_type_to_llvm(rt);
if (lrt == NULL) lrt = T_pint8;
native_sym_arg_t sym = interpret_symbol_arg(args[1], ctx, "cglobal");
if (sym.jl_ptr != NULL) {
res = builder.CreateIntToPtr(sym.jl_ptr, lrt);
}
else if (sym.fptr != NULL) {
res = literal_static_pointer_val(sym.fptr, lrt);
if (imaging_mode)
jl_printf(JL_STDERR,"warning: literal address used in cglobal for %s; code cannot be statically compiled\n", sym.f_name);
}
else {
if (imaging_mode) {
res = runtime_sym_lookup((PointerType*)lrt, sym.f_lib, sym.f_name, ctx);
}
else {
void *symaddr = jl_dlsym_e(get_library(sym.f_lib), sym.f_name);
if (symaddr == NULL) {
std::stringstream msg;
msg << "cglobal: could not find symbol ";
msg << sym.f_name;
if (sym.f_lib != NULL) {
#ifdef _OS_WINDOWS_
assert((intptr_t)sym.f_lib != 1 && (intptr_t)sym.f_lib != 2);
#endif
msg << " in library ";
msg << sym.f_lib;
}
emit_error(msg.str(), ctx);
}
// since we aren't saving this code, there's no sense in
// putting anything complicated here: just JIT the address of the cglobal
res = literal_static_pointer_val(symaddr, lrt);
}
}
JL_GC_POP();
return mark_julia_type(res, rt);
}
// llvmcall(ir, (rettypes...), (argtypes...), args...)
static Value *emit_llvmcall(jl_value_t **args, size_t nargs, jl_codectx_t *ctx)
{
JL_NARGSV(llvmcall, 3)
jl_value_t *rt = NULL, *at = NULL, *ir = NULL;
JL_GC_PUSH3(&ir, &rt, &at);
{
JL_TRY {
at = jl_interpret_toplevel_expr_in(ctx->module, args[3],
jl_tuple_data(ctx->sp),
jl_tuple_len(ctx->sp)/2);
}
JL_CATCH {
jl_rethrow_with_add("error interpreting llvmcall return type");
}
}
{
JL_TRY {
rt = jl_interpret_toplevel_expr_in(ctx->module, args[2],
jl_tuple_data(ctx->sp),
jl_tuple_len(ctx->sp)/2);
}
JL_CATCH {
jl_rethrow_with_add("error interpreting llvmcall argument tuple");
}
}
{
JL_TRY {
ir = jl_interpret_toplevel_expr_in(ctx->module, args[1],
jl_tuple_data(ctx->sp),
jl_tuple_len(ctx->sp)/2);
}
JL_CATCH {
jl_rethrow_with_add("error interpreting IR argument");
}
}
int i = 1;
if (ir == NULL) {
jl_error("Cannot statically evaluate first argument to llvmcall");
}
bool isString = jl_is_byte_string(ir);
bool isPtr = jl_is_cpointer(ir);
if (!isString && !isPtr)
{
jl_error("First argument to llvmcall must be a string or pointer to an LLVM Function");
}
JL_TYPECHK(llvmcall, type, rt);
JL_TYPECHK(llvmcall, tuple, at);
JL_TYPECHK(llvmcall, type, at);
std::stringstream ir_stream;
jl_tuple_t *stt = jl_alloc_tuple(nargs - 3);
for (size_t i = 0; i < nargs-3; ++i)
{
jl_tupleset(stt,i,expr_type(args[4+i],ctx));
}
// Generate arguments
std::string arguments;
llvm::raw_string_ostream argstream(arguments);
jl_tuple_t *tt = (jl_tuple_t*)at;
jl_value_t *rtt = rt;
size_t nargt = jl_tuple_len(tt);
Value **argvals = (Value**) alloca(nargt*sizeof(Value*));
std::vector<llvm::Type*> argtypes;
/*
* Semantics for arguments are as follows:
* If the argument type is immutable (including bitstype), we pass the loaded llvm value
* type. Otherwise we pass a pointer to a jl_value_t.
*/
for (size_t i = 0; i < nargt; ++i)
{
jl_value_t *tti = jl_tupleref(tt,i);
Type *t = julia_type_to_llvm(tti);
argtypes.push_back(t);
if (4+i > nargs)
{
jl_error("Missing arguments to llvmcall!");
}
jl_value_t *argi = args[4+i];
Value *arg;
bool needroot = false;
if (t == jl_pvalue_llvmt || !jl_isbits(tti)) {
arg = emit_expr(argi, ctx, true);
if (t == jl_pvalue_llvmt && arg->getType() != jl_pvalue_llvmt) {
arg = boxed(arg, ctx);
needroot = true;
}
}
else {
arg = emit_unboxed(argi, ctx);
if (jl_is_bitstype(expr_type(argi, ctx))) {
arg = emit_unbox(t, arg, tti);
}
}
#ifdef JL_GC_MARKSWEEP
// make sure args are rooted
if (t == jl_pvalue_llvmt && (needroot || might_need_root(argi))) {
make_gcroot(arg, ctx);
}
#endif
bool mightNeedTempSpace = false;
argvals[i] = julia_to_native(t,tti,arg,argi,false,i,ctx,&mightNeedTempSpace,&mightNeedTempSpace);
}
Function *f;
Type *rettype = julia_type_to_llvm(rtt);
if (isString) {
// Make sure to find a unique name
std::string ir_name;
while(true) {
std::stringstream name;
name << (ctx->f->getName().str()) << i++;
ir_name = name.str();
if (jl_Module->getFunction(ir_name) == NULL)
break;
}
bool first = true;
for (std::vector<Type *>::iterator it = argtypes.begin(); it != argtypes.end(); ++it) {
if (!first)
argstream << ",";
else
first = false;
(*it)->print(argstream);
argstream << " ";
}
std::string rstring;
llvm::raw_string_ostream rtypename(rstring);
rettype->print(rtypename);
ir_stream << "; Number of arguments: " << nargt << "\n"
<< "define "<<rtypename.str()<<" @\"" << ir_name << "\"("<<argstream.str()<<") {\n"
<< jl_string_data(ir) << "\n}";
SMDiagnostic Err = SMDiagnostic();
std::string ir_string = ir_stream.str();
#ifdef LLVM36
Module *m = NULL;
bool failed = parseAssemblyInto(llvm::MemoryBufferRef(ir_string,"llvmcall"),*jl_Module,Err);
if (!failed)
m = jl_Module;
#else
Module *m = ParseAssemblyString(ir_string.c_str(),jl_Module,Err,jl_LLVMContext);
#endif
if (m == NULL) {
std::string message = "Failed to parse LLVM Assembly: \n";
llvm::raw_string_ostream stream(message);
Err.print("julia",stream,true);
jl_error(stream.str().c_str());
}
f = m->getFunction(ir_name);
}
else {
assert(isPtr);
// Create Function skeleton
f = (llvm::Function*)jl_unbox_voidpointer(ir);
assert(f->getReturnType() == rettype);
int i = 0;
for (std::vector<Type *>::iterator it = argtypes.begin();
it != argtypes.end(); ++it, ++i)
assert(*it == f->getFunctionType()->getParamType(i));
#ifdef USE_MCJIT
if (f->getParent() != jl_Module)
{
FunctionMover mover(jl_Module,f->getParent());
f = mover.CloneFunction(f);
}
#endif
//f->dump();
#ifndef LLVM35
if (verifyFunction(*f,PrintMessageAction)) {
#else
llvm::raw_fd_ostream out(1,false);
if (verifyFunction(*f,&out))
{
#endif
f->dump();
jl_error("Malformed LLVM Function");
}
}
/*
* It might be tempting to just try to set the Always inline attribute on the function
* and hope for the best. However, this doesn't work since that would require an inlining
* pass (which is a Call Graph pass and cannot be managed by a FunctionPassManager). Instead
* We are sneaky and call the inliner directly. This however doesn't work until we've actually
* generated the entire function, so we need to store it in the context until the end of the
* function. This also has the benefit of looking exactly like we cut/pasted it in in `code_llvm`.
*/
f->setLinkage(GlobalValue::LinkOnceODRLinkage);
// the actual call
CallInst *inst = builder.CreateCall(prepare_call(f),ArrayRef<Value*>(&argvals[0],nargt));
ctx->to_inline.push_back(inst);
JL_GC_POP();
if (inst->getType() != rettype) {
jl_error("Return type of llvmcall'ed function does not match declared return type");
}
return mark_julia_type(inst,rtt);
}
// --- code generator for ccall itself ---
int try_to_determine_bitstype_nbits(jl_value_t *targ, jl_codectx_t *ctx);
static Value *mark_or_box_ccall_result(Value *result, jl_value_t *rt_expr, jl_value_t *rt, bool static_rt, jl_codectx_t *ctx)
{
if (!static_rt && rt != (jl_value_t*)jl_any_type) {
// box if type was not statically known
int nbits = try_to_determine_bitstype_nbits(rt_expr, ctx);
return allocate_box_dynamic(emit_expr(rt_expr, ctx),
ConstantInt::get(T_size, nbits/8),
result);
}
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);
}
jl_value_t *rtt_ = expr_type(args[2], ctx);
bool static_rt = true; // is return type fully statically known?
if (jl_is_type_type(rtt_) && jl_is_leaf_type(jl_tparam0(rtt_))) {
rt = jl_tparam0(rtt_);
}
else {
JL_TRY {
rt = jl_interpret_toplevel_expr_in(ctx->module, args[2],
jl_tuple_data(ctx->sp),
jl_tuple_len(ctx->sp)/2);
}
JL_CATCH {
static_rt = false;
if (jl_is_type_type(rtt_)) {
if (jl_subtype(jl_tparam0(rtt_), (jl_value_t*)jl_pointer_type, 0)) {
// substitute Ptr{Void} for statically-unknown pointer type
rt = (jl_value_t*)jl_voidpointer_type;
}
else if (jl_subtype(jl_tparam0(rtt_), (jl_value_t*)jl_array_type, 0)) {
// `Array` used as return type just returns a julia object reference
rt = (jl_value_t*)jl_any_type;
}
}
if (rt == NULL) {
emit_error("error interpreting ccall return type", ctx);
JL_GC_POP();
return UndefValue::get(T_void);
}
}
}
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}");
JL_TYPECHK(ccall, type, rt);
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);
}
{
JL_TRY {
at = jl_interpret_toplevel_expr_in(ctx->module, args[3],
jl_tuple_data(ctx->sp),
jl_tuple_len(ctx->sp)/2);
}
JL_CATCH {
//jl_rethrow_with_add("error interpreting ccall argument tuple");
emit_error("error interpreting ccall argument tuple", ctx);
JL_GC_POP();
return UndefValue::get(lrt);
}
}
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);
#if LLVM33
std::vector<AttrBuilder> paramattrs;
#else
AttrBuilder retattrs;
std::vector<AttrBuilder> paramattrs;
std::vector<AttributeWithIndex> attrs;
#endif
int sret = 0;
size_t i;
bool isVa = false;
size_t nargt = jl_tuple_len(tt);
for(i=0; i < nargt; i++) {
#if LLVM32 || LLVM33
paramattrs.push_back(AttrBuilder());
#endif
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"));
}
#if LLVM33
Attribute::AttrKind av;
#elif LLVM32
Attributes::AttrVal av;
#else
Attribute::AttrConst av;
#endif
#if LLVM32 && !LLVM33
if (jl_signed_type && jl_subtype(tti, jl_signed_type, 0))
av = Attributes::SExt;
else
av = Attributes::ZExt;
#else
if (jl_signed_type && jl_subtype(tti, jl_signed_type, 0))
av = Attribute::SExt;
else
av = Attribute::ZExt;
#endif
#if LLVM32 || LLVM33
paramattrs[i+sret].addAttribute(av);
#else
attrs.push_back(AttributeWithIndex::get(i+1+sret, av));
#endif
}
}
Type *t = julia_struct_to_llvm(tti);
if (t == NULL || t == T_void) {
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 == (void *) &jl_array_ptr ||