/
method-to-ir.c
14215 lines (12381 loc) · 437 KB
/
method-to-ir.c
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/**
* \file
* Convert CIL to the JIT internal representation
*
* Author:
* Paolo Molaro (lupus@ximian.com)
* Dietmar Maurer (dietmar@ximian.com)
*
* (C) 2002 Ximian, Inc.
* Copyright 2003-2010 Novell, Inc (http://www.novell.com)
* Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
* Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#include <config.h>
#include <mono/utils/mono-compiler.h>
#include "mini.h"
#ifndef DISABLE_JIT
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_ALLOCA_H
#include <alloca.h>
#endif
#include <mono/utils/memcheck.h>
#include <mono/metadata/abi-details.h>
#include <mono/metadata/assembly.h>
#include <mono/metadata/attrdefs.h>
#include <mono/metadata/loader.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/class.h>
#include <mono/metadata/object.h>
#include <mono/metadata/exception.h>
#include <mono/metadata/opcodes.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/marshal.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/debug-internals.h>
#include <mono/metadata/gc-internals.h>
#include <mono/metadata/security-manager.h>
#include <mono/metadata/threads-types.h>
#include <mono/metadata/security-core-clr.h>
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/profiler.h>
#include <mono/metadata/monitor.h>
#include <mono/utils/mono-memory-model.h>
#include <mono/utils/mono-error-internals.h>
#include <mono/metadata/mono-basic-block.h>
#include <mono/metadata/reflection-internals.h>
#include <mono/utils/mono-threads-coop.h>
#include "trace.h"
#include "ir-emit.h"
#include "jit-icalls.h"
#include "jit.h"
#include "debugger-agent.h"
#include "seq-points.h"
#include "aot-compiler.h"
#include "mini-llvm.h"
#define BRANCH_COST 10
#define INLINE_LENGTH_LIMIT 20
/* These have 'cfg' as an implicit argument */
#define INLINE_FAILURE(msg) do { \
if ((cfg->method != cfg->current_method) && (cfg->current_method->wrapper_type == MONO_WRAPPER_NONE)) { \
inline_failure (cfg, msg); \
goto exception_exit; \
} \
} while (0)
#define CHECK_CFG_EXCEPTION do {\
if (cfg->exception_type != MONO_EXCEPTION_NONE) \
goto exception_exit; \
} while (0)
#define FIELD_ACCESS_FAILURE(method, field) do { \
field_access_failure ((cfg), (method), (field)); \
goto exception_exit; \
} while (0)
#define GENERIC_SHARING_FAILURE(opcode) do { \
if (cfg->gshared) { \
gshared_failure (cfg, opcode, __FILE__, __LINE__); \
goto exception_exit; \
} \
} while (0)
#define GSHAREDVT_FAILURE(opcode) do { \
if (cfg->gsharedvt) { \
gsharedvt_failure (cfg, opcode, __FILE__, __LINE__); \
goto exception_exit; \
} \
} while (0)
#define OUT_OF_MEMORY_FAILURE do { \
mono_cfg_set_exception (cfg, MONO_EXCEPTION_MONO_ERROR); \
mono_error_set_out_of_memory (&cfg->error, ""); \
goto exception_exit; \
} while (0)
#define DISABLE_AOT(cfg) do { \
if ((cfg)->verbose_level >= 2) \
printf ("AOT disabled: %s:%d\n", __FILE__, __LINE__); \
(cfg)->disable_aot = TRUE; \
} while (0)
#define LOAD_ERROR do { \
break_on_unverified (); \
mono_cfg_set_exception (cfg, MONO_EXCEPTION_TYPE_LOAD); \
goto exception_exit; \
} while (0)
#define TYPE_LOAD_ERROR(klass) do { \
cfg->exception_ptr = klass; \
LOAD_ERROR; \
} while (0)
#define CHECK_CFG_ERROR do {\
if (!mono_error_ok (&cfg->error)) { \
mono_cfg_set_exception (cfg, MONO_EXCEPTION_MONO_ERROR); \
goto mono_error_exit; \
} \
} while (0)
/* Determine whenever 'ins' represents a load of the 'this' argument */
#define MONO_CHECK_THIS(ins) (mono_method_signature (cfg->method)->hasthis && ((ins)->opcode == OP_MOVE) && ((ins)->sreg1 == cfg->args [0]->dreg))
static int ldind_to_load_membase (int opcode);
static int stind_to_store_membase (int opcode);
int mono_op_to_op_imm (int opcode);
int mono_op_to_op_imm_noemul (int opcode);
static int inline_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **sp,
guchar *ip, guint real_offset, gboolean inline_always);
static MonoInst*
emit_llvmonly_virtual_call (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, int context_used, MonoInst **sp);
/* helper methods signatures */
static MonoMethodSignature *helper_sig_domain_get;
static MonoMethodSignature *helper_sig_rgctx_lazy_fetch_trampoline;
static MonoMethodSignature *helper_sig_llvmonly_imt_trampoline;
static MonoMethodSignature *helper_sig_jit_thread_attach;
static MonoMethodSignature *helper_sig_get_tls_tramp;
static MonoMethodSignature *helper_sig_set_tls_tramp;
/* type loading helpers */
static GENERATE_GET_CLASS_WITH_CACHE (runtime_helpers, "System.Runtime.CompilerServices", "RuntimeHelpers")
static GENERATE_TRY_GET_CLASS_WITH_CACHE (debuggable_attribute, "System.Diagnostics", "DebuggableAttribute")
/*
* Instruction metadata
*/
#ifdef MINI_OP
#undef MINI_OP
#endif
#ifdef MINI_OP3
#undef MINI_OP3
#endif
#define MINI_OP(a,b,dest,src1,src2) dest, src1, src2, ' ',
#define MINI_OP3(a,b,dest,src1,src2,src3) dest, src1, src2, src3,
#define NONE ' '
#define IREG 'i'
#define FREG 'f'
#define VREG 'v'
#define XREG 'x'
#if SIZEOF_REGISTER == 8 && SIZEOF_REGISTER == SIZEOF_VOID_P
#define LREG IREG
#else
#define LREG 'l'
#endif
/* keep in sync with the enum in mini.h */
const char
ins_info[] = {
#include "mini-ops.h"
};
#undef MINI_OP
#undef MINI_OP3
#define MINI_OP(a,b,dest,src1,src2) ((src2) != NONE ? 2 : ((src1) != NONE ? 1 : 0)),
#define MINI_OP3(a,b,dest,src1,src2,src3) ((src3) != NONE ? 3 : ((src2) != NONE ? 2 : ((src1) != NONE ? 1 : 0))),
/*
* This should contain the index of the last sreg + 1. This is not the same
* as the number of sregs for opcodes like IA64_CMP_EQ_IMM.
*/
const gint8 ins_sreg_counts[] = {
#include "mini-ops.h"
};
#undef MINI_OP
#undef MINI_OP3
guint32
mono_alloc_ireg (MonoCompile *cfg)
{
return alloc_ireg (cfg);
}
guint32
mono_alloc_lreg (MonoCompile *cfg)
{
return alloc_lreg (cfg);
}
guint32
mono_alloc_freg (MonoCompile *cfg)
{
return alloc_freg (cfg);
}
guint32
mono_alloc_preg (MonoCompile *cfg)
{
return alloc_preg (cfg);
}
guint32
mono_alloc_dreg (MonoCompile *cfg, MonoStackType stack_type)
{
return alloc_dreg (cfg, stack_type);
}
/*
* mono_alloc_ireg_ref:
*
* Allocate an IREG, and mark it as holding a GC ref.
*/
guint32
mono_alloc_ireg_ref (MonoCompile *cfg)
{
return alloc_ireg_ref (cfg);
}
/*
* mono_alloc_ireg_mp:
*
* Allocate an IREG, and mark it as holding a managed pointer.
*/
guint32
mono_alloc_ireg_mp (MonoCompile *cfg)
{
return alloc_ireg_mp (cfg);
}
/*
* mono_alloc_ireg_copy:
*
* Allocate an IREG with the same GC type as VREG.
*/
guint32
mono_alloc_ireg_copy (MonoCompile *cfg, guint32 vreg)
{
if (vreg_is_ref (cfg, vreg))
return alloc_ireg_ref (cfg);
else if (vreg_is_mp (cfg, vreg))
return alloc_ireg_mp (cfg);
else
return alloc_ireg (cfg);
}
guint
mono_type_to_regmove (MonoCompile *cfg, MonoType *type)
{
if (type->byref)
return OP_MOVE;
type = mini_get_underlying_type (type);
handle_enum:
switch (type->type) {
case MONO_TYPE_I1:
case MONO_TYPE_U1:
return OP_MOVE;
case MONO_TYPE_I2:
case MONO_TYPE_U2:
return OP_MOVE;
case MONO_TYPE_I4:
case MONO_TYPE_U4:
return OP_MOVE;
case MONO_TYPE_I:
case MONO_TYPE_U:
case MONO_TYPE_PTR:
case MONO_TYPE_FNPTR:
return OP_MOVE;
case MONO_TYPE_CLASS:
case MONO_TYPE_STRING:
case MONO_TYPE_OBJECT:
case MONO_TYPE_SZARRAY:
case MONO_TYPE_ARRAY:
return OP_MOVE;
case MONO_TYPE_I8:
case MONO_TYPE_U8:
#if SIZEOF_REGISTER == 8
return OP_MOVE;
#else
return OP_LMOVE;
#endif
case MONO_TYPE_R4:
return cfg->r4fp ? OP_RMOVE : OP_FMOVE;
case MONO_TYPE_R8:
return OP_FMOVE;
case MONO_TYPE_VALUETYPE:
if (type->data.klass->enumtype) {
type = mono_class_enum_basetype (type->data.klass);
goto handle_enum;
}
if (MONO_CLASS_IS_SIMD (cfg, mono_class_from_mono_type (type)))
return OP_XMOVE;
return OP_VMOVE;
case MONO_TYPE_TYPEDBYREF:
return OP_VMOVE;
case MONO_TYPE_GENERICINST:
if (MONO_CLASS_IS_SIMD (cfg, mono_class_from_mono_type (type)))
return OP_XMOVE;
type = &type->data.generic_class->container_class->byval_arg;
goto handle_enum;
case MONO_TYPE_VAR:
case MONO_TYPE_MVAR:
g_assert (cfg->gshared);
if (mini_type_var_is_vt (type))
return OP_VMOVE;
else
return mono_type_to_regmove (cfg, mini_get_underlying_type (type));
default:
g_error ("unknown type 0x%02x in type_to_regstore", type->type);
}
return -1;
}
void
mono_print_bb (MonoBasicBlock *bb, const char *msg)
{
int i;
MonoInst *tree;
GString *str = g_string_new ("");
g_string_append_printf (str, "%s %d: [IN: ", msg, bb->block_num);
for (i = 0; i < bb->in_count; ++i)
g_string_append_printf (str, " BB%d(%d)", bb->in_bb [i]->block_num, bb->in_bb [i]->dfn);
g_string_append_printf (str, ", OUT: ");
for (i = 0; i < bb->out_count; ++i)
g_string_append_printf (str, " BB%d(%d)", bb->out_bb [i]->block_num, bb->out_bb [i]->dfn);
g_string_append_printf (str, " ]\n");
g_print ("%s", str->str);
g_string_free (str, TRUE);
for (tree = bb->code; tree; tree = tree->next)
mono_print_ins_index (-1, tree);
}
void
mono_create_helper_signatures (void)
{
helper_sig_domain_get = mono_create_icall_signature ("ptr");
helper_sig_rgctx_lazy_fetch_trampoline = mono_create_icall_signature ("ptr ptr");
helper_sig_llvmonly_imt_trampoline = mono_create_icall_signature ("ptr ptr ptr");
helper_sig_jit_thread_attach = mono_create_icall_signature ("ptr ptr");
helper_sig_get_tls_tramp = mono_create_icall_signature ("ptr");
helper_sig_set_tls_tramp = mono_create_icall_signature ("void ptr");
}
static MONO_NEVER_INLINE void
break_on_unverified (void)
{
if (mini_get_debug_options ()->break_on_unverified)
G_BREAKPOINT ();
}
static MONO_NEVER_INLINE void
field_access_failure (MonoCompile *cfg, MonoMethod *method, MonoClassField *field)
{
char *method_fname = mono_method_full_name (method, TRUE);
char *field_fname = mono_field_full_name (field);
mono_cfg_set_exception (cfg, MONO_EXCEPTION_MONO_ERROR);
mono_error_set_generic_error (&cfg->error, "System", "FieldAccessException", "Field `%s' is inaccessible from method `%s'\n", field_fname, method_fname);
g_free (method_fname);
g_free (field_fname);
}
static MONO_NEVER_INLINE void
inline_failure (MonoCompile *cfg, const char *msg)
{
if (cfg->verbose_level >= 2)
printf ("inline failed: %s\n", msg);
mono_cfg_set_exception (cfg, MONO_EXCEPTION_INLINE_FAILED);
}
static MONO_NEVER_INLINE void
gshared_failure (MonoCompile *cfg, int opcode, const char *file, int line)
{
if (cfg->verbose_level > 2) \
printf ("sharing failed for method %s.%s.%s/%d opcode %s line %d\n", cfg->current_method->klass->name_space, cfg->current_method->klass->name, cfg->current_method->name, cfg->current_method->signature->param_count, mono_opcode_name ((opcode)), line);
mono_cfg_set_exception (cfg, MONO_EXCEPTION_GENERIC_SHARING_FAILED);
}
static MONO_NEVER_INLINE void
gsharedvt_failure (MonoCompile *cfg, int opcode, const char *file, int line)
{
cfg->exception_message = g_strdup_printf ("gsharedvt failed for method %s.%s.%s/%d opcode %s %s:%d", cfg->current_method->klass->name_space, cfg->current_method->klass->name, cfg->current_method->name, cfg->current_method->signature->param_count, mono_opcode_name ((opcode)), file, line);
if (cfg->verbose_level >= 2)
printf ("%s\n", cfg->exception_message);
mono_cfg_set_exception (cfg, MONO_EXCEPTION_GENERIC_SHARING_FAILED);
}
/*
* When using gsharedvt, some instatiations might be verifiable, and some might be not. i.e.
* foo<T> (int i) { ldarg.0; box T; }
*/
#define UNVERIFIED do { \
if (cfg->gsharedvt) { \
if (cfg->verbose_level > 2) \
printf ("gsharedvt method failed to verify, falling back to instantiation.\n"); \
mono_cfg_set_exception (cfg, MONO_EXCEPTION_GENERIC_SHARING_FAILED); \
goto exception_exit; \
} \
break_on_unverified (); \
goto unverified; \
} while (0)
#define GET_BBLOCK(cfg,tblock,ip) do { \
(tblock) = cfg->cil_offset_to_bb [(ip) - cfg->cil_start]; \
if (!(tblock)) { \
if ((ip) >= end || (ip) < header->code) UNVERIFIED; \
NEW_BBLOCK (cfg, (tblock)); \
(tblock)->cil_code = (ip); \
ADD_BBLOCK (cfg, (tblock)); \
} \
} while (0)
#if defined(TARGET_X86) || defined(TARGET_AMD64)
#define EMIT_NEW_X86_LEA(cfg,dest,sr1,sr2,shift,imm) do { \
MONO_INST_NEW (cfg, dest, OP_X86_LEA); \
(dest)->dreg = alloc_ireg_mp ((cfg)); \
(dest)->sreg1 = (sr1); \
(dest)->sreg2 = (sr2); \
(dest)->inst_imm = (imm); \
(dest)->backend.shift_amount = (shift); \
MONO_ADD_INS ((cfg)->cbb, (dest)); \
} while (0)
#endif
/* Emit conversions so both operands of a binary opcode are of the same type */
static void
add_widen_op (MonoCompile *cfg, MonoInst *ins, MonoInst **arg1_ref, MonoInst **arg2_ref)
{
MonoInst *arg1 = *arg1_ref;
MonoInst *arg2 = *arg2_ref;
if (cfg->r4fp &&
((arg1->type == STACK_R4 && arg2->type == STACK_R8) ||
(arg1->type == STACK_R8 && arg2->type == STACK_R4))) {
MonoInst *conv;
/* Mixing r4/r8 is allowed by the spec */
if (arg1->type == STACK_R4) {
int dreg = alloc_freg (cfg);
EMIT_NEW_UNALU (cfg, conv, OP_RCONV_TO_R8, dreg, arg1->dreg);
conv->type = STACK_R8;
ins->sreg1 = dreg;
*arg1_ref = conv;
}
if (arg2->type == STACK_R4) {
int dreg = alloc_freg (cfg);
EMIT_NEW_UNALU (cfg, conv, OP_RCONV_TO_R8, dreg, arg2->dreg);
conv->type = STACK_R8;
ins->sreg2 = dreg;
*arg2_ref = conv;
}
}
#if SIZEOF_REGISTER == 8
/* FIXME: Need to add many more cases */
if ((arg1)->type == STACK_PTR && (arg2)->type == STACK_I4) {
MonoInst *widen;
int dr = alloc_preg (cfg);
EMIT_NEW_UNALU (cfg, widen, OP_SEXT_I4, dr, (arg2)->dreg);
(ins)->sreg2 = widen->dreg;
}
#endif
}
#define ADD_BINOP(op) do { \
MONO_INST_NEW (cfg, ins, (op)); \
sp -= 2; \
ins->sreg1 = sp [0]->dreg; \
ins->sreg2 = sp [1]->dreg; \
type_from_op (cfg, ins, sp [0], sp [1]); \
CHECK_TYPE (ins); \
/* Have to insert a widening op */ \
add_widen_op (cfg, ins, &sp [0], &sp [1]); \
ins->dreg = alloc_dreg ((cfg), (MonoStackType)(ins)->type); \
MONO_ADD_INS ((cfg)->cbb, (ins)); \
*sp++ = mono_decompose_opcode ((cfg), (ins)); \
} while (0)
#define ADD_UNOP(op) do { \
MONO_INST_NEW (cfg, ins, (op)); \
sp--; \
ins->sreg1 = sp [0]->dreg; \
type_from_op (cfg, ins, sp [0], NULL); \
CHECK_TYPE (ins); \
(ins)->dreg = alloc_dreg ((cfg), (MonoStackType)(ins)->type); \
MONO_ADD_INS ((cfg)->cbb, (ins)); \
*sp++ = mono_decompose_opcode (cfg, ins); \
} while (0)
#define ADD_BINCOND(next_block) do { \
MonoInst *cmp; \
sp -= 2; \
MONO_INST_NEW(cfg, cmp, OP_COMPARE); \
cmp->sreg1 = sp [0]->dreg; \
cmp->sreg2 = sp [1]->dreg; \
type_from_op (cfg, cmp, sp [0], sp [1]); \
CHECK_TYPE (cmp); \
add_widen_op (cfg, cmp, &sp [0], &sp [1]); \
type_from_op (cfg, ins, sp [0], sp [1]); \
ins->inst_many_bb = (MonoBasicBlock **)mono_mempool_alloc (cfg->mempool, sizeof(gpointer)*2); \
GET_BBLOCK (cfg, tblock, target); \
link_bblock (cfg, cfg->cbb, tblock); \
ins->inst_true_bb = tblock; \
if ((next_block)) { \
link_bblock (cfg, cfg->cbb, (next_block)); \
ins->inst_false_bb = (next_block); \
start_new_bblock = 1; \
} else { \
GET_BBLOCK (cfg, tblock, ip); \
link_bblock (cfg, cfg->cbb, tblock); \
ins->inst_false_bb = tblock; \
start_new_bblock = 2; \
} \
if (sp != stack_start) { \
handle_stack_args (cfg, stack_start, sp - stack_start); \
CHECK_UNVERIFIABLE (cfg); \
} \
MONO_ADD_INS (cfg->cbb, cmp); \
MONO_ADD_INS (cfg->cbb, ins); \
} while (0)
/* *
* link_bblock: Links two basic blocks
*
* links two basic blocks in the control flow graph, the 'from'
* argument is the starting block and the 'to' argument is the block
* the control flow ends to after 'from'.
*/
static void
link_bblock (MonoCompile *cfg, MonoBasicBlock *from, MonoBasicBlock* to)
{
MonoBasicBlock **newa;
int i, found;
#if 0
if (from->cil_code) {
if (to->cil_code)
printf ("edge from IL%04x to IL_%04x\n", from->cil_code - cfg->cil_code, to->cil_code - cfg->cil_code);
else
printf ("edge from IL%04x to exit\n", from->cil_code - cfg->cil_code);
} else {
if (to->cil_code)
printf ("edge from entry to IL_%04x\n", to->cil_code - cfg->cil_code);
else
printf ("edge from entry to exit\n");
}
#endif
found = FALSE;
for (i = 0; i < from->out_count; ++i) {
if (to == from->out_bb [i]) {
found = TRUE;
break;
}
}
if (!found) {
newa = (MonoBasicBlock **)mono_mempool_alloc (cfg->mempool, sizeof (gpointer) * (from->out_count + 1));
for (i = 0; i < from->out_count; ++i) {
newa [i] = from->out_bb [i];
}
newa [i] = to;
from->out_count++;
from->out_bb = newa;
}
found = FALSE;
for (i = 0; i < to->in_count; ++i) {
if (from == to->in_bb [i]) {
found = TRUE;
break;
}
}
if (!found) {
newa = (MonoBasicBlock **)mono_mempool_alloc (cfg->mempool, sizeof (gpointer) * (to->in_count + 1));
for (i = 0; i < to->in_count; ++i) {
newa [i] = to->in_bb [i];
}
newa [i] = from;
to->in_count++;
to->in_bb = newa;
}
}
void
mono_link_bblock (MonoCompile *cfg, MonoBasicBlock *from, MonoBasicBlock* to)
{
link_bblock (cfg, from, to);
}
/**
* mono_find_block_region:
*
* We mark each basic block with a region ID. We use that to avoid BB
* optimizations when blocks are in different regions.
*
* Returns:
* A region token that encodes where this region is, and information
* about the clause owner for this block.
*
* The region encodes the try/catch/filter clause that owns this block
* as well as the type. -1 is a special value that represents a block
* that is in none of try/catch/filter.
*/
static int
mono_find_block_region (MonoCompile *cfg, int offset)
{
MonoMethodHeader *header = cfg->header;
MonoExceptionClause *clause;
int i;
for (i = 0; i < header->num_clauses; ++i) {
clause = &header->clauses [i];
if ((clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) && (offset >= clause->data.filter_offset) &&
(offset < (clause->handler_offset)))
return ((i + 1) << 8) | MONO_REGION_FILTER | clause->flags;
if (MONO_OFFSET_IN_HANDLER (clause, offset)) {
if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY)
return ((i + 1) << 8) | MONO_REGION_FINALLY | clause->flags;
else if (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT)
return ((i + 1) << 8) | MONO_REGION_FAULT | clause->flags;
else
return ((i + 1) << 8) | MONO_REGION_CATCH | clause->flags;
}
}
for (i = 0; i < header->num_clauses; ++i) {
clause = &header->clauses [i];
if (MONO_OFFSET_IN_CLAUSE (clause, offset))
return ((i + 1) << 8) | clause->flags;
}
return -1;
}
static gboolean
ip_in_finally_clause (MonoCompile *cfg, int offset)
{
MonoMethodHeader *header = cfg->header;
MonoExceptionClause *clause;
int i;
for (i = 0; i < header->num_clauses; ++i) {
clause = &header->clauses [i];
if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY && clause->flags != MONO_EXCEPTION_CLAUSE_FAULT)
continue;
if (MONO_OFFSET_IN_HANDLER (clause, offset))
return TRUE;
}
return FALSE;
}
static GList*
mono_find_final_block (MonoCompile *cfg, unsigned char *ip, unsigned char *target, int type)
{
MonoMethodHeader *header = cfg->header;
MonoExceptionClause *clause;
int i;
GList *res = NULL;
for (i = 0; i < header->num_clauses; ++i) {
clause = &header->clauses [i];
if (MONO_OFFSET_IN_CLAUSE (clause, (ip - header->code)) &&
(!MONO_OFFSET_IN_CLAUSE (clause, (target - header->code)))) {
if (clause->flags == type)
res = g_list_append (res, clause);
}
}
return res;
}
static void
mono_create_spvar_for_region (MonoCompile *cfg, int region)
{
MonoInst *var;
var = (MonoInst *)g_hash_table_lookup (cfg->spvars, GINT_TO_POINTER (region));
if (var)
return;
var = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_LOCAL);
/* prevent it from being register allocated */
var->flags |= MONO_INST_VOLATILE;
g_hash_table_insert (cfg->spvars, GINT_TO_POINTER (region), var);
}
MonoInst *
mono_find_exvar_for_offset (MonoCompile *cfg, int offset)
{
return (MonoInst *)g_hash_table_lookup (cfg->exvars, GINT_TO_POINTER (offset));
}
static MonoInst*
mono_create_exvar_for_offset (MonoCompile *cfg, int offset)
{
MonoInst *var;
var = (MonoInst *)g_hash_table_lookup (cfg->exvars, GINT_TO_POINTER (offset));
if (var)
return var;
var = mono_compile_create_var (cfg, &mono_defaults.object_class->byval_arg, OP_LOCAL);
/* prevent it from being register allocated */
var->flags |= MONO_INST_VOLATILE;
g_hash_table_insert (cfg->exvars, GINT_TO_POINTER (offset), var);
return var;
}
/*
* Returns the type used in the eval stack when @type is loaded.
* FIXME: return a MonoType/MonoClass for the byref and VALUETYPE cases.
*/
void
type_to_eval_stack_type (MonoCompile *cfg, MonoType *type, MonoInst *inst)
{
MonoClass *klass;
type = mini_get_underlying_type (type);
inst->klass = klass = mono_class_from_mono_type (type);
if (type->byref) {
inst->type = STACK_MP;
return;
}
handle_enum:
switch (type->type) {
case MONO_TYPE_VOID:
inst->type = STACK_INV;
return;
case MONO_TYPE_I1:
case MONO_TYPE_U1:
case MONO_TYPE_I2:
case MONO_TYPE_U2:
case MONO_TYPE_I4:
case MONO_TYPE_U4:
inst->type = STACK_I4;
return;
case MONO_TYPE_I:
case MONO_TYPE_U:
case MONO_TYPE_PTR:
case MONO_TYPE_FNPTR:
inst->type = STACK_PTR;
return;
case MONO_TYPE_CLASS:
case MONO_TYPE_STRING:
case MONO_TYPE_OBJECT:
case MONO_TYPE_SZARRAY:
case MONO_TYPE_ARRAY:
inst->type = STACK_OBJ;
return;
case MONO_TYPE_I8:
case MONO_TYPE_U8:
inst->type = STACK_I8;
return;
case MONO_TYPE_R4:
inst->type = cfg->r4_stack_type;
break;
case MONO_TYPE_R8:
inst->type = STACK_R8;
return;
case MONO_TYPE_VALUETYPE:
if (type->data.klass->enumtype) {
type = mono_class_enum_basetype (type->data.klass);
goto handle_enum;
} else {
inst->klass = klass;
inst->type = STACK_VTYPE;
return;
}
case MONO_TYPE_TYPEDBYREF:
inst->klass = mono_defaults.typed_reference_class;
inst->type = STACK_VTYPE;
return;
case MONO_TYPE_GENERICINST:
type = &type->data.generic_class->container_class->byval_arg;
goto handle_enum;
case MONO_TYPE_VAR:
case MONO_TYPE_MVAR:
g_assert (cfg->gshared);
if (mini_is_gsharedvt_type (type)) {
g_assert (cfg->gsharedvt);
inst->type = STACK_VTYPE;
} else {
type_to_eval_stack_type (cfg, mini_get_underlying_type (type), inst);
}
return;
default:
g_error ("unknown type 0x%02x in eval stack type", type->type);
}
}
/*
* The following tables are used to quickly validate the IL code in type_from_op ().
*/
static const char
bin_num_table [STACK_MAX] [STACK_MAX] = {
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_I4, STACK_INV, STACK_PTR, STACK_INV, STACK_MP, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_I8, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_PTR, STACK_INV, STACK_PTR, STACK_INV, STACK_MP, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_R8, STACK_INV, STACK_INV, STACK_INV, STACK_R8},
{STACK_INV, STACK_MP, STACK_INV, STACK_MP, STACK_INV, STACK_PTR, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_R8, STACK_INV, STACK_INV, STACK_INV, STACK_R4}
};
static const char
neg_table [] = {
STACK_INV, STACK_I4, STACK_I8, STACK_PTR, STACK_R8, STACK_INV, STACK_INV, STACK_INV, STACK_R4
};
/* reduce the size of this table */
static const char
bin_int_table [STACK_MAX] [STACK_MAX] = {
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_I4, STACK_INV, STACK_PTR, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_I8, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_PTR, STACK_INV, STACK_PTR, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV}
};
static const char
bin_comp_table [STACK_MAX] [STACK_MAX] = {
/* Inv i L p F & O vt r4 */
{0},
{0, 1, 0, 1, 0, 0, 0, 0}, /* i, int32 */
{0, 0, 1, 0, 0, 0, 0, 0}, /* L, int64 */
{0, 1, 0, 1, 0, 2, 4, 0}, /* p, ptr */
{0, 0, 0, 0, 1, 0, 0, 0, 1}, /* F, R8 */
{0, 0, 0, 2, 0, 1, 0, 0}, /* &, managed pointer */
{0, 0, 0, 4, 0, 0, 3, 0}, /* O, reference */
{0, 0, 0, 0, 0, 0, 0, 0}, /* vt value type */
{0, 0, 0, 0, 1, 0, 0, 0, 1}, /* r, r4 */
};
/* reduce the size of this table */
static const char
shift_table [STACK_MAX] [STACK_MAX] = {
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_I4, STACK_INV, STACK_I4, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_I8, STACK_INV, STACK_I8, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_PTR, STACK_INV, STACK_PTR, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
{STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV}
};
/*
* Tables to map from the non-specific opcode to the matching
* type-specific opcode.
*/
/* handles from CEE_ADD to CEE_SHR_UN (CEE_REM_UN for floats) */
static const guint16
binops_op_map [STACK_MAX] = {
0, OP_IADD-CEE_ADD, OP_LADD-CEE_ADD, OP_PADD-CEE_ADD, OP_FADD-CEE_ADD, OP_PADD-CEE_ADD, 0, 0, OP_RADD-CEE_ADD
};
/* handles from CEE_NEG to CEE_CONV_U8 */
static const guint16
unops_op_map [STACK_MAX] = {
0, OP_INEG-CEE_NEG, OP_LNEG-CEE_NEG, OP_PNEG-CEE_NEG, OP_FNEG-CEE_NEG, OP_PNEG-CEE_NEG, 0, 0, OP_RNEG-CEE_NEG
};
/* handles from CEE_CONV_U2 to CEE_SUB_OVF_UN */
static const guint16
ovfops_op_map [STACK_MAX] = {
0, OP_ICONV_TO_U2-CEE_CONV_U2, OP_LCONV_TO_U2-CEE_CONV_U2, OP_PCONV_TO_U2-CEE_CONV_U2, OP_FCONV_TO_U2-CEE_CONV_U2, OP_PCONV_TO_U2-CEE_CONV_U2, OP_PCONV_TO_U2-CEE_CONV_U2, 0, OP_RCONV_TO_U2-CEE_CONV_U2
};
/* handles from CEE_CONV_OVF_I1_UN to CEE_CONV_OVF_U_UN */
static const guint16
ovf2ops_op_map [STACK_MAX] = {
0, OP_ICONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_LCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_PCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_FCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_PCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, 0, 0, OP_RCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN
};
/* handles from CEE_CONV_OVF_I1 to CEE_CONV_OVF_U8 */
static const guint16
ovf3ops_op_map [STACK_MAX] = {
0, OP_ICONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_LCONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_PCONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_FCONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_PCONV_TO_OVF_I1-CEE_CONV_OVF_I1, 0, 0, OP_RCONV_TO_OVF_I1-CEE_CONV_OVF_I1
};
/* handles from CEE_BEQ to CEE_BLT_UN */
static const guint16
beqops_op_map [STACK_MAX] = {
0, OP_IBEQ-CEE_BEQ, OP_LBEQ-CEE_BEQ, OP_PBEQ-CEE_BEQ, OP_FBEQ-CEE_BEQ, OP_PBEQ-CEE_BEQ, OP_PBEQ-CEE_BEQ, 0, OP_FBEQ-CEE_BEQ
};
/* handles from CEE_CEQ to CEE_CLT_UN */
static const guint16
ceqops_op_map [STACK_MAX] = {
0, OP_ICEQ-OP_CEQ, OP_LCEQ-OP_CEQ, OP_PCEQ-OP_CEQ, OP_FCEQ-OP_CEQ, OP_PCEQ-OP_CEQ, OP_PCEQ-OP_CEQ, 0, OP_RCEQ-OP_CEQ
};
/*
* Sets ins->type (the type on the eval stack) according to the
* type of the opcode and the arguments to it.
* Invalid IL code is marked by setting ins->type to the invalid value STACK_INV.
*
* FIXME: this function sets ins->type unconditionally in some cases, but
* it should set it to invalid for some types (a conv.x on an object)
*/
static void
type_from_op (MonoCompile *cfg, MonoInst *ins, MonoInst *src1, MonoInst *src2)
{
switch (ins->opcode) {
/* binops */
case CEE_ADD:
case CEE_SUB:
case CEE_MUL:
case CEE_DIV:
case CEE_REM:
/* FIXME: check unverifiable args for STACK_MP */
ins->type = bin_num_table [src1->type] [src2->type];
ins->opcode += binops_op_map [ins->type];
break;
case CEE_DIV_UN:
case CEE_REM_UN:
case CEE_AND:
case CEE_OR:
case CEE_XOR:
ins->type = bin_int_table [src1->type] [src2->type];
ins->opcode += binops_op_map [ins->type];
break;
case CEE_SHL:
case CEE_SHR:
case CEE_SHR_UN:
ins->type = shift_table [src1->type] [src2->type];
ins->opcode += binops_op_map [ins->type];
break;
case OP_COMPARE:
case OP_LCOMPARE:
case OP_ICOMPARE:
ins->type = bin_comp_table [src1->type] [src2->type] ? STACK_I4: STACK_INV;
if ((src1->type == STACK_I8) || ((SIZEOF_VOID_P == 8) && ((src1->type == STACK_PTR) || (src1->type == STACK_OBJ) || (src1->type == STACK_MP))))
ins->opcode = OP_LCOMPARE;
else if (src1->type == STACK_R4)
ins->opcode = OP_RCOMPARE;
else if (src1->type == STACK_R8)
ins->opcode = OP_FCOMPARE;
else
ins->opcode = OP_ICOMPARE;
break;
case OP_ICOMPARE_IMM:
ins->type = bin_comp_table [src1->type] [src1->type] ? STACK_I4 : STACK_INV;
if ((src1->type == STACK_I8) || ((SIZEOF_VOID_P == 8) && ((src1->type == STACK_PTR) || (src1->type == STACK_OBJ) || (src1->type == STACK_MP))))
ins->opcode = OP_LCOMPARE_IMM;
break;
case CEE_BEQ:
case CEE_BGE:
case CEE_BGT:
case CEE_BLE:
case CEE_BLT:
case CEE_BNE_UN:
case CEE_BGE_UN:
case CEE_BGT_UN:
case CEE_BLE_UN:
case CEE_BLT_UN:
ins->opcode += beqops_op_map [src1->type];
break;
case OP_CEQ: