bool DataLocation::getParams( vector<string>& params,
Walker* proc) {
assert(proc != 0);
bool found = false;
vector<Stackwalker::Frame> stackWalk;
vector<localVar *> vars;
vector<localVar *>::iterator varIter;
if(!proc->walkStack(stackWalk)) {
return Err::warn(false, "Could not walk stack");
}
Stackwalker::Frame& curFrame = stackWalk[0];
string frameName;
curFrame.getName(frameName);
SymtabAPI::Function* func = getFunctionForFrame(curFrame);
if (!func) {
return Err::warn(false, "Function for frame '%s' not found", frameName.c_str());
}
func->getParams(vars);
if(!vars.empty()) {
varIter = vars.begin();
for(; varIter != vars.end(); varIter++) {
localVar* var = *varIter;
if(var) {
string name = var->getName();
params.push_back(name);
}
}
}
return true;
}
bool DataLocation::getParams( vector<string>& params,
Walker* proc) {
assert(proc != 0);
bool found = false;
vector<localVar *> vars;
vector<localVar *>::iterator varIter;
Stackwalker::Frame curFrame(proc);
if(!proc->getInitialFrame(curFrame)) {
return DYSECTWARN(false, "FuncParamNames could not get Initial Frame: %s", Stackwalker::getLastErrorMsg());
}
string frameName;
if(!curFrame.getName(frameName))
DYSECTWARN(false, "Failed to get frame name: %s", Stackwalker::getLastErrorMsg());
SymtabAPI::Function* func = getFunctionForFrame(curFrame);
if (!func) {
return DYSECTWARN(false, "Function for frame '%s' not found", frameName.c_str());
}
func->getParams(vars);
if(!vars.empty()) {
varIter = vars.begin();
for(; varIter != vars.end(); varIter++) {
localVar* var = *varIter;
if(var) {
string name = var->getName();
params.push_back(name);
}
}
}
return true;
}
bool DataLocation::findVariable(Process::const_ptr process, Walker* proc, string name, DataLocation*& location) {
assert(proc != 0);
bool found = false;
string baseStr, memberStr;
int len = name.size();
#if 0
// XXX: Quick hack to get structure members
// Should really be a part of the expression engine
enum struct_parser {
base,
dash,
gt,
member
} state = base;
const char* str = name.c_str();
for(int i = 0; i < len; i++) {
char c = str[i];
if((state == base) && (c == '-'))
state = dash;
else if((state == dash) && (c == '>'))
state = member;
else {
if(state == base)
baseStr += c;
if(state == member)
memberStr += c;
}
}
#endif
if(!memberStr.empty()) {
name = baseStr;
}
// 1st approach - look for local variable (resident in function for current frame)
vector<Stackwalker::Frame> stackWalk;
vector<localVar *> vars;
vector<localVar *>::iterator varIter;
if(!proc->walkStack(stackWalk)) {
return Err::warn(false, "Could not walk stack");
}
Stackwalker::Frame& curFrame = stackWalk[0];
string frameName;
curFrame.getName(frameName);
SymtabAPI::Function* func = getFunctionForFrame(curFrame);
if (!func) {
return Err::warn(false, "Function for frame '%s' not found", frameName.c_str());
}
func->findLocalVariable(vars, name);
Err::verbose(true, "Is variables for '%s' empty? %s", name.c_str(), vars.empty() ? "yes" : "no");
if(!vars.empty()) {
found = true;
Module* mod = func->getModule();
Symtab* symtab = 0;
if(mod) {
symtab = mod->exec();
} else {
return Err::warn(false, "Could not find symbol table containing variable '%s'", name.c_str());
}
location = new LocalVariableLocation(stackWalk, 0, vars[0], symtab);
#if 0
// XXX: Hack continued
if(!memberStr.empty()) {
Type* symType = location->getType();
if(symType) {
typeStruct *stType = symType->getStructType();
if(stType) {
vector<Field*>* fields = stType->getComponents();
if(fields) {
vector<Field*>::iterator fieldIter = fields->begin();
for(;fieldIter != fields->end(); fieldIter++) {
Field* field = *fieldIter;
if(field && (field->getName().compare(memberStr) == 0)) {
// Rebase
Err::verbose(true, "Rebasing to member '%s' from %s", field->getName().c_str(), memberStr.c_str());
int offset = field->getOffset();
Type* fieldType = field->getType();
DataLocation* fieldVariable = location->getInnerVariable(fieldType, offset);
if(fieldVariable) {
location = fieldVariable;
}
}
}
}
}
}
}
#endif
return true;
}
// Is parameter?
if(func->getParams(vars)) {
Err::verbose(true, "Is parameters empty? %s", vars.empty() ? "yes" : "no" );
if(!vars.empty()) {
varIter = vars.begin();
for(;varIter != vars.end(); varIter++) {
Err::verbose(true, "Parameter found: '%s'", (*varIter)->getName().c_str());
}
}
}
if(func->getLocalVariables(vars)) {
Err::verbose(true, "Is locals empty? %s", vars.empty() ? "yes" : "no" );
if(!vars.empty()) {
varIter = vars.begin();
for(;varIter != vars.end(); varIter++) {
Err::verbose(true, "Local found: '%s'", (*varIter)->getName().c_str());
}
}
} else {
Err::verbose(true, "Local variables not present");
}
if(!found) {
// Try "global" variable / Available through symbol table
vector<LibAddrPair> libs;
vector<LibAddrPair>::iterator libIter;
if(SymbolTable::getLibraries(libs, proc) != OK) {
return Error;
}
// Search through libraries
for(libIter = libs.begin(); libIter != libs.end(); libIter++) {
string curLibName = libIter->first;
Dyninst::Address offset = libIter->second;
Symtab* symtab = 0;
if(SymbolTable::getSymbolTable(curLibName, symtab) != OK) {
return Err::warn(false, "Could not get symbol table");
}
if(findVariable(offset, symtab, process, name, location)) {
return true;
}
}
}
return false;
}
