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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "utils_llvm.h"
#include <fcntl.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "android/librsloader.h"
#include "class_loader.h"
#include "object.h"
#include "object_utils.h"
#include "runtime_support_llvm.h"
namespace art {
std::string MangleForLLVM(const std::string& s) {
std::string result;
size_t char_count = CountModifiedUtf8Chars(s.c_str());
const char* cp = &s[0];
for (size_t i = 0; i < char_count; ++i) {
uint16_t ch = GetUtf16FromUtf8(&cp);
if (ch == '$' || ch == '<' || ch == '>' || ch > 127) {
StringAppendF(&result, "_0%04x", ch);
} else {
switch (ch) {
case '_':
result += "_1";
break;
case ';':
result += "_2";
break;
case '[':
result += "_3";
break;
case '/':
result += "_";
break;
default:
result.push_back(ch);
break;
}
}
}
return result;
}
std::string LLVMShortName(const Method* m) {
MethodHelper mh(m);
std::string class_name(mh.GetDeclaringClassDescriptor());
// Remove the leading 'L' and trailing ';'...
CHECK_EQ(class_name[0], 'L') << class_name;
CHECK_EQ(class_name[class_name.size() - 1], ';') << class_name;
class_name.erase(0, 1);
class_name.erase(class_name.size() - 1, 1);
std::string method_name(mh.GetName());
std::string short_name;
short_name += "Art_";
short_name += MangleForLLVM(class_name);
short_name += "_";
short_name += MangleForLLVM(method_name);
return short_name;
}
std::string LLVMLongName(const Method* m) {
std::string long_name;
long_name += LLVMShortName(m);
long_name += "__";
std::string signature(MethodHelper(m).GetSignature());
signature.erase(0, 1);
signature.erase(signature.begin() + signature.find(')'), signature.end());
long_name += MangleForLLVM(signature);
return long_name;
}
std::string LLVMStubName(const Method* m) {
MethodHelper mh(m);
std::string stub_name;
if (m->IsStatic()) {
stub_name += "ArtSUpcall_";
} else {
stub_name += "ArtUpcall_";
}
stub_name += mh.GetShorty();
return stub_name;
}
void LLVMLinkLoadMethod(const std::string& file_name, Method* method) {
CHECK(method != NULL);
int fd = open(file_name.c_str(), O_RDONLY);
CHECK(fd >= 0) << "Error: ELF not found: " << file_name;
struct stat sb;
CHECK(fstat(fd, &sb) == 0) << "Error: Unable to stat ELF: " << file_name;
unsigned char const *image = (unsigned char const *)
mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
CHECK(image != MAP_FAILED) << "Error: Unable to mmap ELF: " << file_name;
RSExecRef relocatable =
rsloaderCreateExec(image, sb.st_size, art_find_runtime_support_func, 0);
CHECK(relocatable) << "Error: Unable to load ELF: " << file_name;
const void *addr = rsloaderGetSymbolAddress(relocatable, LLVMLongName(method).c_str());
CHECK(addr) << "Error: ELF (" << file_name << ") has no symbol " << LLVMLongName(method);
method->SetCode(reinterpret_cast<const uint32_t*>(addr));
method->SetFrameSizeInBytes(0);
method->SetCoreSpillMask(0);
method->SetFpSpillMask(0);
method->SetMappingTable(reinterpret_cast<const uint32_t*>(NULL));
method->SetVmapTable(reinterpret_cast<const uint16_t*>(NULL));
method->SetGcMap(reinterpret_cast<const uint8_t*>(NULL));
addr = rsloaderGetSymbolAddress(relocatable, LLVMStubName(method).c_str());
CHECK(addr) << "Error: ELF (" << file_name << ") has no symbol " << LLVMStubName(method);
method->SetInvokeStub(reinterpret_cast<void (*)(const art::Method*, art::Object*, art::Thread*,
art::byte*, art::JValue*)>(addr));
close(fd);
}
} // namespace art
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