bool PCLibraryState::cacheLibraryRanges(Library::ptr lib)
{
std::string filename = lib->getName();
Address base = lib->getLoadAddress();
SymbolReaderFactory *fact = getDefaultSymbolReader();
SymReader *reader = fact->openSymbolReader(filename);
if (!reader) {
sw_printf("[%s:%u] - Error could not open expected file %s\n",
FILE__, __LINE__, filename.c_str());
return false;
}
int num_segments = reader->numSegments();
for (int i=0; i<num_segments; i++) {
SymSegment segment;
reader->getSegment(i, segment);
if (segment.type != 1) continue;
Address segment_start = segment.mem_addr + base;
Address segment_end = segment_start + segment.mem_size;
loadedLibs.insert(segment_start, segment_end,
makeCache(LibAddrPair(lib->getName(),
lib->getLoadAddress()),
lib));
}
return true;
}
void PCLibraryState::checkForNewLib(Library::ptr lib)
{
if (lib->getData())
return;
sw_printf("[%s:%u] - Detected new library %s at %lx, notifying\n",
FILE__, __LINE__, lib->getName().c_str(), lib->getLoadAddress());
lib->setData((void *) 0x1);
StepperGroup *group = pdebug->getWalker()->getStepperGroup();
LibAddrPair la(lib->getName(), lib->getLoadAddress());
group->newLibraryNotification(&la, library_load);
}
bool PCLibraryState::getAOut(LibAddrPair &ao)
{
Process::ptr proc = pdebug->getProc();
CHECK_PROC_LIVE;
Library::ptr lib = proc->libraries().getExecutable();
if (!lib) {
sw_printf("[%s:%u] - Could not get executable\n", FILE__, __LINE__);
return false;
}
ao = LibAddrPair(lib->getName(), lib->getLoadAddress());
return true;
}
DysectErrorCode Backend::writeModuleVariable(Dyninst::ProcControlAPI::Process::ptr process, std::string variableName, std::string libraryPath, void *value, int size) {
bool result, found = false;
string libraryName;
Symtab *symtab = NULL;
Offset varOffset;
Address loadAddress;
vector<SymtabAPI::Variable *> variables;
LibraryPool::iterator libsIter;
if (symtabs.find(libraryPath) == symtabs.end()) {
result = Symtab::openFile(symtab, libraryPath.c_str());
if (result == false) {
DYSECTWARN(false, "Failed to find file %s for symtab", libraryPath.c_str());
return Error;
}
}
else {
symtab = symtabs[libraryPath];
}
result = symtab->findVariablesByName(variables, variableName);
if (result == false || variables.size() < 1) {
DYSECTWARN(false, "Failed to find %s variable", variableName.c_str());
return Error;
}
varOffset = variables[0]->getOffset();
DYSECTLOG(true, "found %s at offset 0x%lx", variableName.c_str(), varOffset);
libraryName = basename(libraryPath.c_str());
LibraryPool &libs = process->libraries();
for (libsIter = libs.begin(); libsIter != libs.end(); libsIter++)
{
Library::ptr libraryPtr = *libsIter;
if (libraryPtr->getName().find(libraryName) == string::npos)
continue;
loadAddress = (*libsIter)->getLoadAddress();
found = true;
DYSECTLOG(true, "found library %s at 0x%lx", libraryName.c_str(), loadAddress);
break;
}
if (found == false) {
DYSECTWARN(false, "Failed to find library %s", libraryName.c_str());
return Error;
}
process->writeMemory(loadAddress + varOffset, value, size);
return OK;
}
bool PCLibraryState::memoryScan(Process::ptr proc, Address addr, LibAddrPair &lib) {
LibraryPool::iterator i;
Library::ptr nearest_predecessor = Library::ptr();
signed int pred_distance = 0;
Library::ptr nearest_successor = Library::ptr();
signed int succ_distance = 0;
/**
* Search the entire library list for the dynamic sections that come
* directly before and after our target address (nearest_predecessor
* and nearest_successor).
*
* They dynamic linker (and who-knows-what on future systems) can have a
* dynamic address of zero. Remember any library with a zero dynamic
* address with zero_dynamic_libs, and manually check those if the
* nearest_successor and nearest_predecessor.
**/
std::vector<Library::ptr> zero_dynamic_libs;
for (i = proc->libraries().begin(); i != proc->libraries().end(); i++)
{
Library::ptr slib = *i;
checkForNewLib(slib);
Address dyn_addr = slib->getDynamicAddress();
if (!dyn_addr) {
zero_dynamic_libs.push_back(slib);
continue;
}
signed int distance = addr - dyn_addr;
if (distance == 0) {
lib.first = slib->getName();
lib.second = slib->getLoadAddress();
sw_printf("[%s:%u] - Found library %s contains address %lx\n",
FILE__, __LINE__, lib.first.c_str(), addr);
return true;
}
else if (distance < 0) {
if (!pred_distance || pred_distance < distance) {
nearest_predecessor = slib;
pred_distance = distance;
}
}
else if (distance > 0) {
if (!succ_distance || succ_distance > distance) {
nearest_successor = slib;
succ_distance = distance;
}
}
}
/**
* Likely a static binary, set nearest_predecessor so that
* the following check will test it.
**/
if (!nearest_predecessor && !nearest_successor) {
nearest_predecessor = proc->libraries().getExecutable();
}
/**
* Check if predessor contains our address first--this should be the typical case
**/
if (nearest_predecessor && checkLibraryContains(addr, nearest_predecessor)) {
lib.first = nearest_predecessor->getName();
lib.second = nearest_predecessor->getLoadAddress();
sw_printf("[%s:%u] - Found library %s contains address %lx\n",
FILE__, __LINE__, lib.first.c_str(), addr);
return true;
}
/**
* Check successor
**/
if (nearest_successor && checkLibraryContains(addr, nearest_successor)) {
lib.first = nearest_successor->getName();
lib.second = nearest_successor->getLoadAddress();
sw_printf("[%s:%u] - Found library %s contains address %lx\n",
FILE__, __LINE__, lib.first.c_str(), addr);
return true;
}
/**
* The address wasn't located by the dynamic section tests. Check
* any libraries without dynamic pointers, plus the executable.
**/
std::vector<Library::ptr>::iterator k = zero_dynamic_libs.begin();
for (; k != zero_dynamic_libs.end(); k++) {
if (checkLibraryContains(addr, *k)) {
lib.first = (*k)->getName();
lib.second = (*k)->getLoadAddress();
return true;
}
}
if(checkLibraryContains(addr, proc->libraries().getExecutable()))
{
lib.first = proc->libraries().getExecutable()->getName();
lib.second = proc->libraries().getExecutable()->getLoadAddress();
sw_printf("[%s:%u] - Found executable %s contains address %lx\n", FILE__,
__LINE__, lib.first.c_str(), addr);
return true;
}
sw_printf("[%s:%u] - Could not find library for addr %lx\n",
FILE__, __LINE__, addr);
return false;
}
DysectErrorCode Backend::irpc(Process::ptr process, string libraryPath, string funcName, void *arg, int argLength) {
int funcAddrOffset = -1, argOffset = -1;
bool result, found = false;
unsigned char *begin, *end, *c, *buffer;
unsigned long size, *valuePtr, *ptr, value;
string libraryName;
Symtab *symtab = NULL;
Address loadAddress;
Offset funcOffset;
vector<SymtabAPI::Function *> functions;
if (symtabs.find(libraryPath) == symtabs.end()) {
result = Symtab::openFile(symtab, libraryPath.c_str());
if (result == false) {
DYSECTWARN(false, "Failed to find file %s for symtab", libraryPath.c_str());
return Error;
}
}
else {
symtab = symtabs[libraryPath];
}
libraryName = basename(libraryPath.c_str());
LibraryPool &libs = process->libraries();
LibraryPool::iterator libsIter;
for (libsIter = libs.begin(); libsIter != libs.end(); libsIter++)
{
Library::ptr libraryPtr = *libsIter;
if (libraryPtr->getName().find(libraryName) == string::npos)
continue;
loadAddress = (*libsIter)->getLoadAddress();
found = true;
DYSECTLOG(true, "found library %s at 0x%lx", libraryName.c_str(), loadAddress);
break;
}
if (found == false) {
DYSECTWARN(false, "Failed to find library %s", libraryName.c_str());
return Error;
}
begin = call_snippet_begin;
end = call_snippet_end;
size = (unsigned long)*end - (unsigned long)*begin;
for (c = begin; c != end; c++) {
valuePtr = (unsigned long *)c;
if (*valuePtr == 0x1122334455667788) {
funcAddrOffset = (long)(c - begin);
}
if (*valuePtr == 0xaabbccddeeffaabb) {
argOffset = (long)(c - begin);
}
}
result = symtab->findFunctionsByName(functions, funcName);
if (result == false || functions.size() < 1) {
DYSECTWARN(false, "Failed to find %s function", funcName.c_str());
return Error;
}
funcOffset = functions[0]->getOffset();
DYSECTLOG(true, "found %s at offset 0x%lx", funcName.c_str(), funcOffset);
buffer = (unsigned char *)malloc(size);
if (!buffer) {
DYSECTWARN(false, "Failed to allocate %d bytes for target %d", size);
return Error;
}
memcpy(buffer, begin, size);
c = buffer + funcAddrOffset;
value = loadAddress + funcOffset;
memcpy(c, &value, sizeof(unsigned long));
c = buffer + argOffset;
memcpy(c, arg, argLength);
IRPC::ptr irpc;
irpc = IRPC::createIRPC((void *)buffer, size, false);
if (!irpc) {
DYSECTWARN(false, "Failed to create IRPC in target");
return Error;
}
result = process->postIRPC(irpc);
if (!result) {
DYSECTWARN(false, "Failed to post IRPC in target");
return Error;
}
DYSECTLOG(true, "irpc successful for target");
return OK;
}
test_results_t pc_libraryMutator::executeTest()
{
//std::cerr << "ExecuteTest" << std::endl;
proclibs.clear();
got_breakpoint = false;
myerror = false;
Process::registerEventCallback(EventType::Breakpoint, on_breakpoint);
Process::registerEventCallback(EventType::Library, on_library);
std::vector<Process::ptr>::iterator i;
for (i = comp->procs.begin(); i != comp->procs.end(); i++) {
std::string libc_fullname;
Library::ptr libc_lib;
Process::ptr proc = *i;
Process::const_ptr cproc = proc;
proc_info_lib &pi = proclibs[cproc];
for (LibraryPool::iterator j = proc->libraries().begin();
j != proc->libraries().end(); j++)
{
Library::ptr lib = *j;
#if !defined(os_windows_test)
if (lib->getName().find("libc") != std::string::npos) {
pi.found_libc = true;
libc_fullname = lib->getName();
libc_lib = lib;
}
#else
if (lib->getName().find("msvcrt") != std::string::npos) {
pi.found_libc = true;
libc_fullname = lib->getName();
libc_lib = lib;
}
#endif
if (lib->getName().find("pc_library_mutatee") != std::string::npos ||
lib->getName().find("pc_library.") != std::string::npos) {
pi.found_exec = true;
}
}
if(!libc_fullname.empty()) {
Library::ptr libc_lib2 = proc->libraries().getLibraryByName(libc_fullname);
if (libc_lib != libc_lib2) {
logerror("Failed to find libc in getLibraryByName\n");
myerror = true;
}
}
bool result = proc->continueProc();
if (!result) {
logerror("Failed to continue process\n");
myerror = true;
}
}
syncloc loc[NUM_PARALLEL_PROCS];
bool result = comp->recv_broadcast((unsigned char *) loc, sizeof(syncloc));
if (!result) {
logerror("Failed to recieve sync broadcast\n");
myerror = true;
}
for (unsigned j=0; j<comp->procs.size(); j++) {
if (loc[j].code != SYNCLOC_CODE) {
logerror("Recieved unexpected message code\n");
myerror = true;
}
}
result = comp->send_broadcast((unsigned char *) loc, sizeof(syncloc));
if (!result) {
logerror("Failed to send sync broadcast\n");
myerror = true;
}
if (got_breakpoint) {
logerror("Recieved breakpoint, shouldn't have\n");
myerror = true;
}
if (comp->procs.size() != proclibs.size()) {
logerror("Didn't get library events from enough processes\n");
myerror = true;
}
for (std::map<Process::const_ptr, proc_info_lib>::iterator j = proclibs.begin();
j != proclibs.end(); j++)
{
const proc_info_lib &pi = j->second;
if (pi.loaded_libtesta == -1) {
logerror("Didn't load libtestA\n");
myerror = true;
}
if (pi.loaded_libtestb == -1) {
logerror("Didn't load libtestB\n");
myerror = true;
}
if (pi.unloaded_libtesta == -1) {
logerror("Didn't unload libtestA\n");
myerror = true;
}
if (pi.unloaded_libtestb == -1) {
logerror("Didn't unload libtestB\n");
myerror = true;
}
if (pi.loaded_libtesta != 0 ||
pi.loaded_libtestb != 1 ||
pi.unloaded_libtestb != 2 ||
pi.unloaded_libtesta != 3)
{
logerror("Unexpected library load order\n");
myerror = true;
}
if(!isAttach)
{
#if !defined(os_windows_test)
if (!pi.found_exec) {
logerror("Failed to find executable\n");
myerror = true;
}
#endif
if (!pi.found_libc) {
logerror("Failed to find libc\n");
myerror = true;
}
}
}
Process::removeEventCallback(on_library);
Process::removeEventCallback(on_breakpoint);
return myerror ? FAILED : PASSED;
}
Process::cb_ret_t on_library(Event::const_ptr ev)
{
EventLibrary::const_ptr evlib = ev->getEventLibrary();
if (!evlib) {
logerror("error, received non library event\n");
myerror = true;
return Process::cbDefault;
}
proc_info_lib &pi = proclibs[ev->getProcess()];
const LibraryPool& libpool = ev->getProcess()->libraries();
std::set<Library::ptr>::const_iterator i;
for (i = evlib->libsAdded().begin(); i != evlib->libsAdded().end(); i++) {
Library::ptr lib = *i;
// FIXME
//cerr << hex << "Callback library " << lib << dec << endl;
if (lib->getName().find("testA") != string::npos) {
pi.loaded_libtesta = pi.order++;
}
if (lib->getName().find("testB") != string::npos) {
pi.loaded_libtestb = pi.order++;
}
bool found_lib = false;
find_by_pointer F = find_by_pointer(lib);
for(LibraryPool::const_iterator i = libpool.begin();
i != libpool.end();
++i)
{
F(*i);
}
found_lib = F.found_it;
if (!found_lib) {
logerror("New library was not in library list\n");
myerror = true;
}
}
for (i = evlib->libsRemoved().begin(); i != evlib->libsRemoved().end(); i++) {
Library::ptr lib = *i;
// Reduce these to "testA/testB" because Windows standard is for DLLs not to be "lib" prefixed
if (lib->getName().find("testA") != string::npos) {
pi.unloaded_libtesta = pi.order++;
}
if (lib->getName().find("testB") != string::npos) {
pi.unloaded_libtestb = pi.order++;
}
find_by_pointer f(lib);
for(LibraryPool::const_iterator i = libpool.begin();
i != libpool.end();
++i)
{
f(*i);
}
if(f.found_it) {
logerror("Removed library was still in library list\n");
myerror = true;
}
/* for (LibraryPool::const_iterator j = libpool.begin();
j != libpool.end(); j++)
{
if (*j == lib) {
logerror("Removed library was still in library list\n");
myerror = true;
}
}
*/
}
return Process::cbDefault;
}