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|
//
// Mono.ILASM.MethodDef
//
// Author(s):
// Jackson Harper (Jackson@LatitudeGeo.com)
//
// (C) 2003 Jackson Harper, All rights reserved
//
using System;
using System.Text;
using System.Collections;
using System.Security;
namespace Mono.ILASM {
public class MethodDef : ICustomAttrTarget, IDeclSecurityTarget {
private PEAPI.MethAttr meth_attr;
private PEAPI.CallConv call_conv;
private PEAPI.ImplAttr impl_attr;
private string name;
private string signature;
private Hashtable vararg_sig_table;
private ParamDef ret_param;
private ArrayList param_list;
private ArrayList inst_list;
private ArrayList customattr_list;
private DeclSecurity decl_sec;
private Hashtable label_table;
private Hashtable labelref_table;
private ArrayList label_list;
private PEAPI.MethodDef methoddef;
private bool entry_point;
private bool zero_init;
private bool is_resolved;
private bool is_defined;
private ArrayList local_list;
private Hashtable named_local_table;
private bool init_locals;
private int max_stack;
private bool pinvoke_info;
private ExternModule pinvoke_mod;
private string pinvoke_name;
private PEAPI.PInvokeAttr pinvoke_attr;
private SourceMethod source;
private TypeDef type_def;
private GenericParameters gen_params;
private Location start;
public MethodDef (CodeGen codegen, PEAPI.MethAttr meth_attr,
PEAPI.CallConv call_conv, PEAPI.ImplAttr impl_attr,
string name, BaseTypeRef ret_type, ArrayList param_list,
Location start, GenericParameters gen_params, TypeDef type_def)
{
this.meth_attr = meth_attr;
this.call_conv = call_conv;
this.impl_attr = impl_attr;
this.name = name;
this.param_list = param_list;
this.type_def = type_def;
this.gen_params = gen_params;
this.ret_param = new ParamDef (PEAPI.ParamAttr.Default, "", ret_type);
this.start = (Location) start.Clone ();
inst_list = new ArrayList ();
label_table = new Hashtable ();
labelref_table = new Hashtable ();
label_list = new ArrayList ();
local_list = new ArrayList ();
named_local_table = new Hashtable ();
entry_point = false;
zero_init = false;
init_locals = false;
max_stack = -1;
pinvoke_info = false;
is_defined = false;
is_resolved = false;
ResolveGenParams ();
CreateSignature ();
codegen.BeginMethodDef (this);
if (codegen.SymbolWriter != null)
source = codegen.SymbolWriter.BeginMethod (this, start);
}
public string Name {
get { return name; }
}
public string Signature {
get { return signature; }
}
public BaseTypeRef RetType {
get { return ret_param.Type; }
}
public PEAPI.CallConv CallConv {
get { return call_conv; }
}
public PEAPI.MethodDef PeapiMethodDef {
get { return methoddef; }
}
public PEAPI.MethAttr Attributes {
get { return meth_attr; }
set { meth_attr = value; }
}
public bool IsVararg {
get { return (call_conv & PEAPI.CallConv.Vararg) != 0; }
}
public bool IsStatic {
get { return (meth_attr & PEAPI.MethAttr.Static) != 0; }
}
public bool IsVirtual {
get { return (meth_attr & PEAPI.MethAttr.Virtual) != 0; }
}
public bool IsAbstract {
get { return (meth_attr & PEAPI.MethAttr.Abstract) != 0; }
}
public Location StartLocation {
get { return start; }
}
public DeclSecurity DeclSecurity {
get {
if (decl_sec == null)
decl_sec = new DeclSecurity ();
return decl_sec;
}
}
public string FullName {
get {
if (type_def == null)
return Name;
return type_def.FullName + "." + Name;
}
}
public BaseTypeRef[] ParamTypeList () {
if (param_list == null)
return new BaseTypeRef[0];
int count = 0;
BaseTypeRef[] type_list = new BaseTypeRef[param_list.Count];
foreach (ParamDef param in param_list) {
type_list[count++] = param.Type;
}
return type_list;
}
public void AddPInvokeInfo (PEAPI.PInvokeAttr pinvoke_attr, ExternModule pinvoke_mod,
string pinvoke_name)
{
this.pinvoke_attr = pinvoke_attr;
this.pinvoke_mod = pinvoke_mod;
this.pinvoke_name = pinvoke_name;
pinvoke_info = true;
}
public int GenParamCount {
get { return (gen_params != null ? gen_params.Count : 0); }
}
public GenericParameter GetGenericParam (string id)
{
if (gen_params == null)
return null;
return gen_params.GetGenericParam (id);
}
public GenericParameter GetGenericParam (int index)
{
if (gen_params == null || index < 0 || index >= gen_params.Count)
return null;
return gen_params [index];
}
public int GetGenericParamNum (string id)
{
if (gen_params == null)
return -1;
return gen_params.GetGenericParamNum (id);
}
public void AddCustomAttribute (CustomAttr customattr)
{
if (customattr_list == null)
customattr_list = new ArrayList ();
customattr_list.Add (customattr);
}
public void AddRetTypeMarshalInfo (PEAPI.NativeType native_type)
{
this.ret_param.AddMarshalInfo (native_type);
}
public void AddLocals (ArrayList local_list)
{
int slot_pos = this.local_list.Count;
foreach (Local local in local_list) {
if (local.Slot == -1) {
local.Slot = slot_pos;
}
slot_pos++;
if (local.Name == null)
continue;
if(!named_local_table.Contains(local.Name))
named_local_table.Add (local.Name, local);
}
this.local_list.AddRange (local_list);
}
public Local GetNamedLocal (string name)
{
return (Local) named_local_table[name];
}
public int GetNamedLocalSlot (string name)
{
Local local = (Local) named_local_table[name];
return local.Slot;
}
public int GetNamedParamPos (string name)
{
int pos = -1;
if (param_list == null)
return -1;
if (!IsStatic)
pos ++;
foreach (ParamDef param in param_list) {
pos ++;
if (param.Name.CompareTo (name) == 0)
return pos;
}
return pos;
}
/* index - 0: return type
* 1: params start from this
*/
public ParamDef GetParam (int index)
{
if (index == 0)
return ret_param;
if ((param_list == null) || (index < 0) || (index > param_list.Count))
return null;
index --; /* param_list has params zero-based */
if (param_list [index] != null)
return (ParamDef)param_list [index];
else
return null;
}
public void InitLocals ()
{
init_locals = true;
}
public void EntryPoint ()
{
if (!IsStatic)
Report.Error ("Non-static method as entrypoint.");
entry_point = true;
}
public void ZeroInit ()
{
zero_init = true;
}
public void SetMaxStack (int max_stack)
{
this.max_stack = max_stack;
}
public void ResolveGenParam (PEAPI.GenParam gpar)
{
if (gpar.Index != -1)
return;
if (gpar.Type == PEAPI.GenParamType.MVar)
gpar.Index = GetGenericParamNum (gpar.Name);
else
gpar.Index = type_def.GetGenericParamNum (gpar.Name);
if (gpar.Index < 0)
Report.Error (String.Format ("Invalid {0}type parameter '{1}'",
(gpar.Type == PEAPI.GenParamType.MVar ? "method " : ""),
gpar.Name));
}
public void ResolveGenParams ()
{
GenericParameters type_params = (type_def != null) ? type_def.TypeParameters : null;
if (gen_params == null && type_params == null)
return;
if (gen_params != null)
gen_params.ResolveConstraints (type_params, gen_params);
BaseGenericTypeRef gtr = RetType as BaseGenericTypeRef;
if (gtr != null)
gtr.Resolve (type_params, gen_params);
if (param_list == null)
return;
foreach (ParamDef param in param_list) {
gtr = param.Type as BaseGenericTypeRef;
if (gtr != null)
gtr.Resolve (type_params, gen_params);
}
}
public PEAPI.MethodDef Resolve (CodeGen code_gen)
{
return Resolve (code_gen, null);
}
public PEAPI.MethodDef Resolve (CodeGen code_gen, PEAPI.ClassDef classdef)
{
if (is_resolved)
return methoddef;
PEAPI.Param [] param_array = GenerateParams (code_gen);
FixAttributes ();
ret_param.Define (code_gen);
if (classdef == null)
methoddef = code_gen.PEFile.AddMethod (meth_attr, impl_attr,
name, ret_param.PeapiParam, param_array);
else
methoddef = classdef.AddMethod (meth_attr, impl_attr,
name, ret_param.PeapiParam, param_array);
methoddef.AddCallConv (call_conv);
is_resolved = true;
return methoddef;
}
private PEAPI.Param [] GenerateParams (CodeGen code_gen)
{
PEAPI.Param[] param_array;
if (param_list != null && param_list.Count > 0) {
int param_count = param_list.Count;
// Remove the last param if its the sentinel, not sure what
// should happen with more then one sentinel
ParamDef last = (ParamDef) param_list [param_count-1];
if (last.IsSentinel ())
param_count--;
param_array = new PEAPI.Param [param_count];
for (int i = 0; i < param_count; i++) {
ParamDef paramdef = (ParamDef) param_list [i];
paramdef.Define (code_gen);
param_array [i] = paramdef.PeapiParam;
}
} else {
param_array = new PEAPI.Param [0];
}
return param_array;
}
public PEAPI.MethodRef GetVarargSig (PEAPI.Type[] opt)
{
if (!is_resolved)
throw new InternalErrorException ("Methods must be resolved before a vararg sig can be created.");
PEAPI.MethodRef methref = null;
StringBuilder sigbuilder = new StringBuilder ();
string sig;
foreach (PEAPI.Type t in opt)
sigbuilder.Append (opt + ", ");
sig = sigbuilder.ToString ();
if (vararg_sig_table == null) {
vararg_sig_table = new Hashtable ();
} else {
methref = vararg_sig_table [sig] as PEAPI.MethodRef;
}
if (methref == null) {
methref = methoddef.MakeVarArgSignature (opt);
vararg_sig_table [sig] = methref;
}
return methref;
}
/// <summary>
/// Define a member method
/// </summary>
public void Define (CodeGen code_gen)
{
if (is_defined)
return;
if (type_def == null)
/* Global method */
Resolve (code_gen, null);
else
Resolve (code_gen, (PEAPI.ClassDef) type_def.ClassDef);
WriteCode (code_gen, methoddef);
//code_gen.Report.Message (String.Format ("Assembled method {0}::{1}", typedef.FullName, name));
is_defined = true;
}
public void AddInstr (IInstr instr)
{
inst_list.Add (instr);
}
protected void WriteCode (CodeGen code_gen, PEAPI.MethodDef methoddef)
{
/// Add the custrom attributes to this method
if (customattr_list != null)
foreach (CustomAttr customattr in customattr_list) {
customattr.AddTo (code_gen, methoddef);
if (customattr.IsSuppressUnmanaged (code_gen))
methoddef.AddMethAttribute (PEAPI.MethAttr.HasSecurity);
}
/// Add declarative security to this method
if (decl_sec != null) {
decl_sec.AddTo (code_gen, methoddef);
methoddef.AddMethAttribute (PEAPI.MethAttr.HasSecurity);
}
// Generic type parameters
if (gen_params != null)
gen_params.Resolve (code_gen, methoddef);
if (type_def == null) {
//Global method
meth_attr &= ~PEAPI.MethAttr.Abstract;
meth_attr |= PEAPI.MethAttr.Static;
} else {
if ((inst_list.Count > 0) && type_def.IsInterface && !IsStatic)
Report.Error (start, "Method cannot have body if it is non-static declared in an interface");
if (IsAbstract) {
if (!type_def.IsAbstract)
Report.Error (start, String.Format ("Abstract method '{0}' in non-abstract class '{1}'",
Name, type_def.FullName));
if (inst_list.Count > 0)
Report.Error (start, "Method cannot have body if it is abstract.");
return;
}
}
if (entry_point)
methoddef.DeclareEntryPoint ();
if (local_list.Count > 0) {
int ec = Report.ErrorCount;
PEAPI.Local[] local_array = new PEAPI.Local[local_list.Count];
foreach (Local local in local_list)
local_array[local.Slot] = local.GetPeapiLocal (code_gen);
if (Report.ErrorCount > ec)
return;
if (zero_init)
init_locals = true;
methoddef.AddLocals (local_array, init_locals);
}
/// Nothing seems to work if maxstack is not set,
/// i need to find out if this NEEDs to be set
/// and what its default value should be
if (max_stack < 0)
max_stack = 8;
methoddef.SetMaxStack (max_stack);
if (pinvoke_info) {
methoddef.AddPInvokeInfo (pinvoke_mod.ModuleRef,
(pinvoke_name != null ? pinvoke_name : name), pinvoke_attr);
}
if ((impl_attr & PEAPI.ImplAttr.Runtime) == PEAPI.ImplAttr.Runtime) {
if (inst_list.Count > 0)
Report.Error (start, String.Format ("Method cannot have body if it is non-IL runtime-supplied, '{0}'",
FullName));
} else {
if (((impl_attr & PEAPI.ImplAttr.Native) != 0) ||
((impl_attr & PEAPI.ImplAttr.Unmanaged) != 0))
Report.Error (start, String.Format ("Cannot compile native/unmanaged method, '{0}'",
FullName));
}
if (inst_list.Count > 0) {
/* Has body */
if ((impl_attr & PEAPI.ImplAttr.InternalCall) != 0)
Report.Error (start, String.Format ("Method cannot have body if it is an internal call, '{0}'",
FullName));
if (pinvoke_info)
Report.Error (start, String.Format ("Method cannot have body if it is pinvoke, '{0}'",
FullName));
} else {
if (pinvoke_info ||
((impl_attr & PEAPI.ImplAttr.Runtime) != 0) ||
((impl_attr & PEAPI.ImplAttr.InternalCall) != 0))
/* No body required */
return;
Report.Warning (start, "Method has no body, 'ret' emitted.");
AddInstr (new SimpInstr (PEAPI.Op.ret, start));
}
PEAPI.CILInstructions cil = methoddef.CreateCodeBuffer ();
/// Create all the labels
/// TODO: Most labels don't actually need to be created so we could
/// probably only create the ones that need to be
LabelInfo[] label_info = new LabelInfo[label_table.Count + label_list.Count];
label_table.Values.CopyTo (label_info, 0);
label_list.CopyTo (label_info, label_table.Count);
int previous_pos = -1;
LabelInfo previous_label = null;
Array.Sort (label_info);
foreach (LabelInfo label in label_info) {
if (label.UseOffset) {
label.Define (new PEAPI.CILLabel (label.Offset));
continue;
}
if (label.Pos == previous_pos)
label.Label = previous_label.Label;
else
label.Define (cil.NewLabel ());
previous_label = label;
previous_pos = label.Pos;
}
// Set all the label refs
foreach (LabelInfo label in labelref_table.Values) {
LabelInfo def = (LabelInfo) label_table[label.Name];
if (def == null) {
Report.Error ("Undefined Label: " + label);
return;
}
label.Label = def.Label;
}
int label_pos = 0;
int next_label_pos = (label_info.Length > 0 ? label_info[0].Pos : -1);
for (int i=0; i<inst_list.Count; i++) {
IInstr instr = (IInstr) inst_list[i];
if (next_label_pos == i) {
cil.CodeLabel (label_info[label_pos].Label);
if (label_pos < label_info.Length) {
while (next_label_pos == i && ++label_pos < label_info.Length) {
if (label_info[label_pos].UseOffset)
cil.CodeLabel (label_info[label_pos].Label);
next_label_pos = label_info[label_pos].Pos;
}
}
if (label_pos >= label_info.Length)
next_label_pos = -1;
}
if (source != null)
source.MarkLocation (instr.Location.line, cil.Offset);
instr.Emit (code_gen, this, cil);
}
if (source != null)
source.MarkLocation (source.EndLine, cil.Offset);
}
public LabelInfo AddLabel (string name)
{
LabelInfo label_info = (LabelInfo) label_table[name];
if (label_info != null)
Report.Error ("Duplicate label '" + name + "'");
label_info = new LabelInfo (name, inst_list.Count);
label_table [name] = label_info;
return label_info;
}
public LabelInfo AddLabelRef (string name)
{
LabelInfo label_info = (LabelInfo) label_table[name];
if (label_info != null)
return label_info;
label_info = (LabelInfo) labelref_table[name];
if (label_info != null)
return label_info;
label_info = new LabelInfo (name, -1);
labelref_table.Add (name, label_info);
return label_info;
}
public LabelInfo AddLabel (int offset)
{
// We go pos + 1 so this line is not counted
LabelInfo label_info = new LabelInfo (null, inst_list.Count+1, (uint) offset);
label_list.Add (label_info);
return label_info;
}
public LabelInfo AddLabel ()
{
LabelInfo label_info = new LabelInfo (null, inst_list.Count);
label_list.Add (label_info);
return label_info;
}
public PEAPI.CILLabel GetLabelDef (string name)
{
LabelInfo label_info = (LabelInfo) label_table[name];
return label_info.Label;
}
public PEAPI.CILLabel GetLabelDef (int pos)
{
foreach (LabelInfo li in label_list) {
if (li.Pos == pos)
return li.Label;
}
return null;
}
private void CreateSignature ()
{
if (IsVararg)
signature = CreateVarargSignature (RetType, name, param_list);
else
signature = CreateSignature (RetType, name, param_list, GenParamCount);
}
public static string CreateSignature (BaseTypeRef RetType, string name, IList param_list, int gen_param_count)
{
StringBuilder builder = new StringBuilder ();
builder.Append (RetType.FullName);
builder.Append (" ");
builder.Append (name);
if (gen_param_count > 0)
builder.AppendFormat ("`{0}", gen_param_count);
builder.Append ('(');
if (param_list != null) {
bool first = true;
foreach (ParamDef paramdef in param_list) {
if (!first)
builder.Append (',');
builder.Append (paramdef.TypeName);
first = false;
}
}
builder.Append (')');
return builder.ToString ();
}
public static string CreateVarargSignature (BaseTypeRef RetType, string name, IList param_list)
{
StringBuilder builder = new StringBuilder ();
ParamDef last = null;
builder.Append (RetType.FullName);
builder.Append (" ");
builder.Append (name);
builder.Append ('(');
bool first = true;
if (param_list != null) {
foreach (ParamDef paramdef in param_list) {
if (!first)
builder.Append (',');
builder.Append (paramdef.TypeName);
first = false;
}
last = (ParamDef) param_list[param_list.Count - 1];
}
if (last == null || !last.IsSentinel ()) {
if (!first)
builder.Append (',');
builder.Append ("...");
}
builder.Append (')');
return builder.ToString ();
}
public static string CreateVarargSignature (BaseTypeRef RetType, string name, BaseTypeRef [] param_list)
{
StringBuilder builder = new StringBuilder ();
BaseTypeRef last = null;
builder.Append (RetType.FullName);
builder.Append (" ");
builder.Append (name);
builder.Append ('(');
bool first = true;
if (param_list != null && param_list.Length > 0) {
foreach (BaseTypeRef param in param_list) {
if (!first)
builder.Append (',');
builder.Append (param.FullName);
first = false;
last = param;
if (param is SentinelTypeRef)
break;
}
}
if (last == null || !(last is SentinelTypeRef)) {
if (!first)
builder.Append (',');
builder.Append ("...");
}
builder.Append (')');
return builder.ToString ();
}
public static string CreateSignature (BaseTypeRef RetType, string name, BaseTypeRef[] param_list, int gen_param_count)
{
StringBuilder builder = new StringBuilder ();
builder.Append (RetType.FullName);
builder.Append (" ");
builder.Append (name);
if (gen_param_count > 0)
builder.AppendFormat ("`{0}", gen_param_count);
builder.Append ('(');
if (param_list != null) {
bool first = true;
foreach (BaseTypeRef param in param_list) {
if (!first)
builder.Append (',');
builder.Append (param.FullName);
first = false;
if (param is SentinelTypeRef)
break;
}
}
builder.Append (')');
return builder.ToString ();
}
private void FixAttributes ()
{
if (name == ".ctor" || name == ".cctor")
meth_attr |= PEAPI.MethAttr.SpecialName | PEAPI.MethAttr.RTSpecialName;
// If methods aren't flagged as static they are instance
if ((PEAPI.MethAttr.Static & meth_attr) == 0)
call_conv |= PEAPI.CallConv.Instance;
}
}
}
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