ciSignature.cpp revision 2547:ddd894528dbc 
1266692Sgshapiro/*
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790792Sgshapiro * published by the Free Software Foundation.
890792Sgshapiro *
990792Sgshapiro * This code is distributed in the hope that it will be useful, but WITHOUT
1090792Sgshapiro * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1190792Sgshapiro * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
1290792Sgshapiro * version 2 for more details (a copy is included in the LICENSE file that
1390792Sgshapiro * accompanied this code).
1490792Sgshapiro *
1590792Sgshapiro * You should have received a copy of the GNU General Public License version
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1990792Sgshapiro * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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2390792Sgshapiro */
2490792Sgshapiro
25#include "precompiled.hpp"
26#include "ci/ciSignature.hpp"
27#include "ci/ciUtilities.hpp"
28#include "memory/allocation.inline.hpp"
29#include "oops/oop.inline.hpp"
30#include "runtime/signature.hpp"
31
32// ciSignature
33//
34// This class represents the signature of a method.
35
36// ------------------------------------------------------------------
37// ciSignature::ciSignature
38ciSignature::ciSignature(ciKlass* accessing_klass, constantPoolHandle cpool, ciSymbol* symbol) {
39  ASSERT_IN_VM;
40  EXCEPTION_CONTEXT;
41  _accessing_klass = accessing_klass;
42  _symbol = symbol;
43
44  ciEnv* env = CURRENT_ENV;
45  Arena* arena = env->arena();
46  _types = new (arena) GrowableArray<ciType*>(arena, 8, 0, NULL);
47
48  int size = 0;
49  int count = 0;
50  ResourceMark rm(THREAD);
51  Symbol* sh = symbol->get_symbol();
52  SignatureStream ss(sh);
53  for (; ; ss.next()) {
54    // Process one element of the signature
55    ciType* type;
56    if (!ss.is_object()) {
57      type = ciType::make(ss.type());
58    } else {
59      Symbol* name = ss.as_symbol(THREAD);
60      if (HAS_PENDING_EXCEPTION) {
61        type = ss.is_array() ? (ciType*)ciEnv::unloaded_ciobjarrayklass()
62          : (ciType*)ciEnv::unloaded_ciinstance_klass();
63        env->record_out_of_memory_failure();
64        CLEAR_PENDING_EXCEPTION;
65      } else {
66        ciSymbol* klass_name = env->get_symbol(name);
67        type = env->get_klass_by_name_impl(_accessing_klass, cpool, klass_name, false);
68      }
69    }
70    _types->append(type);
71    if (ss.at_return_type()) {
72      // Done processing the return type; do not add it into the count.
73      break;
74    }
75    size += type->size();
76    count++;
77  }
78  _size = size;
79  _count = count;
80}
81
82// ------------------------------------------------------------------
83// ciSignature::return_ciType
84//
85// What is the return type of this signature?
86ciType* ciSignature::return_type() const {
87  return _types->at(_count);
88}
89
90// ------------------------------------------------------------------
91// ciSignature::ciType_at
92//
93// What is the type of the index'th element of this
94// signature?
95ciType* ciSignature::type_at(int index) const {
96  assert(index < _count, "out of bounds");
97  // The first _klasses element holds the return klass.
98  return _types->at(index);
99}
100
101// ------------------------------------------------------------------
102// ciSignature::print_signature
103void ciSignature::print_signature() {
104  _symbol->print_symbol();
105}
106
107// ------------------------------------------------------------------
108// ciSignature::print
109void ciSignature::print() {
110  tty->print("<ciSignature symbol=");
111  print_signature();
112 tty->print(" accessing_klass=");
113  _accessing_klass->print();
114  tty->print(" address=0x%x>", (address)this);
115}
116