本文很水，是对于不会移植fart的小白来写的，整个项目就只是做了一些针对高版本fart api的迭代，大佬请绕过，不喜勿喷。如有错误，还请指点
aosp基于android_13_r78，fart8.0
修改处代码中均已注释
修改点：
art_method.cc
extern "C" void dumpArtMethod(ArtMethod *artmethod) REQUIRES_SHARED(Locks::mutator_lock_) {
char *dexfilepath = (char *) malloc(sizeof(char) * 1000);
if (dexfilepath == nullptr) {
LOG(INFO) << "ArtMethod::dumpArtMethod,methodname:" << artmethod->PrettyMethod().c_str() <<
"malloc 1000 byte failed";
return;
}
int result = 0;
int fcmdline = -1;
char szCmdline[64] = {0};
char szProcName[256] = {0};
int procid = getpid();
sprintf(szCmdline, "/proc/%d/cmdline", procid);
fcmdline = open(szCmdline, O_RDONLY);
if (fcmdline > 0) {
result = read(fcmdline, szProcName, 256);
if (result < 0) {
LOG(ERROR) << "ArtMethod::dumpArtMethod,open cmdline file file error";
return;
}
close(fcmdline);
}
if (szProcName[0]) {
const DexFile *dex_file = artmethod->GetDexFile();
const uint8_t *begin_ = dex_file->Begin(); // Start of data.
size_t size_ = dex_file->Size(); // Length of data.
memset(dexfilepath, 0, 1000);
int size_int_ = (int) size_;
memset(dexfilepath, 0, 1000);
sprintf(dexfilepath, "/data/data/%s/%d_dexfile.dex", szProcName, size_int_);
int dexfilefp = open(dexfilepath,O_RDONLY);
if (dexfilefp > 0) {
close(dexfilefp);
dexfilefp = 0;
} else {
int fp = open(dexfilepath,O_CREAT | O_APPEND | O_RDWR, 0666);
if (fp > 0) {
result = write(fp, (void *) begin_, size_);
if (result < 0) {
}
fsync(fp);
close(fp);
memset(dexfilepath, 0, 1000);
sprintf(dexfilepath, "/data/data/%s/%d_classlist.txt", szProcName, size_int_);
int classlistfile = open(dexfilepath,O_CREAT | O_APPEND | O_RDWR, 0666);
if (classlistfile > 0) {
for (size_t ii = 0; ii < dex_file->NumClassDefs(); ++ii) {
const dex::ClassDef &class_def = dex_file->GetClassDef(ii);
const char *descriptor = dex_file->GetClassDescriptor(class_def);
result = write(classlistfile, (void *) descriptor, strlen(descriptor));
if (result < 0) {
}
const char *temp = "\n";
result = write(classlistfile, (void *) temp, 1);
if (result < 0) {
}
}
fsync(classlistfile);
close(classlistfile);
}
}
}
// const DexFile::CodeItem* code_item = artmethod->GetCodeItem();
#include "dex/standard_dex_file.h"
LOG(ERROR) << "[dumpArtMethod->]" << "codeitem";
//修改处
const art::StandardDexFile::CodeItem *code_item = (art::StandardDexFile::CodeItem *) artmethod->
GetCodeItem();
if (LIKELY(code_item != nullptr)) {
//修改处开始
CodeItemInstructionAccessor codeitemins(*dex_file, code_item);
CodeItemDataAccessor codeitemdata(*dex_file, code_item);
int code_item_len = 0;
void *item = (void *) code_item;
// if (code_item->tries_size_>0) {
//原本的8.0直接访问tries_size，但是在源码版本13处，这个变成了私有的，但是在code_item类中
//定义了友元，所以可以通过友元访问私有
if (codeitemdata.TriesSize() > 0) {
//inline const dex::TryItem* DexFile::GetTryItems(const DexInstructionIterator& code_item_end,uint32_t offset)
// const uint8_t *handler_data = (const uint8_t *)(DexFile::GetTryItems(*code_item, code_item->tries_size_));
// uint8_t * tail = codeitem_end(&handler_data);
//同上，友元访问
const void *data_end = codeitemdata.CodeItemDataEnd();
code_item_len = (int) ((uint64_t) data_end - (uint64_t) item);
//修改处结束
} else {
// code_item_len = 16+code_item->insns_size_in_code_units_*2;
//同上，友元访问
code_item_len = 16 + codeitemins.InsnsSizeInCodeUnits() * 2;
}
memset(dexfilepath, 0, 1000);
int size_int = (int) dex_file->Size(); // Length of data
// uint32_t method_idx=artmethod->GetDexMethodIndexUnchecked();
//修改处
uint32_t method_idx = artmethod->GetDexMethodIndex();
sprintf(dexfilepath, "/data/data/%s/%d_ins_%d.bin", szProcName, size_int, (int) gettidv1());
int fp2 = open(dexfilepath,O_CREAT | O_APPEND | O_RDWR, 0666);
if (fp2 > 0) {
lseek(fp2, 0,SEEK_END);
memset(dexfilepath, 0, 1000);
int offset = (int) ((uint64_t) item - (uint64_t) begin_);
result = write(fp2, "{name:", 6);
if (result < 0) {
}
std::string funcname = artmethod->PrettyMethod();
const char *methodname = funcname.c_str();
result = write(fp2, methodname, strlen(methodname));
if (result < 0) {
}
memset(dexfilepath, 0, 1000);
sprintf(dexfilepath, ",method_idx:%d,offset:%d,code_item_len:%d,ins:", method_idx, offset,
code_item_len);
int contentlength = strlen(dexfilepath);
result = write(fp2, (void *) dexfilepath, contentlength);
if (result < 0) {
}
long outlen = 0;
char *base64result = base64_encode((char *) item, (long) code_item_len, &outlen);
if (base64result != nullptr) {
result = write(fp2, base64result, outlen);
if (result < 0) {
}
} else {
const char *errorinfo = "base64encode codeitem error";
result = write(fp2, errorinfo, strlen(errorinfo));
if (result < 0) {
}
}
if (base64result != nullptr) {
free(base64result);
base64result = nullptr;
}
result = write(fp2, "};", 2);
if (result < 0) {
}
fsync(fp2);
close(fp2);
}
}
}
if (dexfilepath != nullptr) {
free(dexfilepath);
dexfilepath = nullptr;
}
}
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