PinCmd::PinCmd(Config* conf, const char* configFile, const char* outputDir, uint64_t shmid) {
//Figure the program paths
const char* zsimEnvPath = getenv("ZSIM_PATH");
g_string pinPath, zsimPath;
if (zsimEnvPath) {
info("Using env path %s", zsimEnvPath);
pinPath = zsimEnvPath;
pinPath += "/pinbin";
zsimPath = zsimEnvPath;
zsimPath += "/libzsim.so";
} else {
pinPath = QUOTED(PIN_PATH);
zsimPath = QUOTED(ZSIM_PATH);
}
args.push_back(pinPath);
//Global pin options
args.push_back("-follow_execv"); //instrument child processes
args.push_back("-tool_exit_timeout"); //don't wait much of internal threads
args.push_back("1");
//Additional options (e.g., -smc_strict for Java), parsed from config
const char* pinOptions = conf->get<const char*>("sim.pinOptions", "");
wordexp_t p;
wordexp(pinOptions, &p, 0);
for (uint32_t i = 0; i < p.we_wordc; i++) {
args.push_back(g_string(p.we_wordv[i]));
}
wordfree(&p);
//Load tool
args.push_back("-t");
args.push_back(zsimPath);
//Tool options
if (configFile) {
//Check configFile is an absolute path
//NOTE: We check rather than canonicalizing it ourselves because by the time we're created, we might be in another directory
char* absPath = realpath(configFile, nullptr);
if (std::string(configFile) != std::string(absPath)) {
panic("Internal zsim bug, configFile should be absolute");
}
free(absPath);
args.push_back("-config");
args.push_back(configFile);
}
args.push_back("-outputDir");
args.push_back(outputDir);
std::stringstream shmid_ss;
shmid_ss << shmid;
args.push_back("-shmid");
args.push_back(shmid_ss.str().c_str());
if (conf->get<bool>("sim.logToFile", false)) {
args.push_back("-logToFile");
}
//Read the per-process params of the processes run directly by the harness
while (true) {
std::stringstream p_ss;
p_ss << "process" << procInfo.size();
if (!conf->exists(p_ss.str().c_str())) break;
const char* cmd = conf->get<const char*>(p_ss.str() + ".command");
const char* input = conf->get<const char*>(p_ss.str() + ".input", "");
const char* loader = conf->get<const char*>(p_ss.str() + ".loader", "");
const char* env = conf->get<const char*>(p_ss.str() + ".env", "");
ProcCmdInfo pi = {g_string(cmd), g_string(input), g_string(loader), g_string(env)};
procInfo.push_back(pi);
}
}
int launchXtermDebugger(int targetPid, LibInfo* libzsimAddrs) {
int childPid = fork();
if (childPid == 0) {
std::string targetPidStr = Str(targetPid);
char symbolCmdStr[2048];
snprintf(symbolCmdStr, sizeof(symbolCmdStr), "add-symbol-file %s %p -s .data %p -s .bss %p", QUOTED(ZSIM_PATH), libzsimAddrs->textAddr, libzsimAddrs->dataAddr, libzsimAddrs->bssAddr);
const char* const args[] = {"xterm", "-e", "cgdb", "-p", targetPidStr.c_str(),
"-ex", "set confirm off", //we know what we're doing in the following 2 commands
"-ex", symbolCmdStr,
"-ex", "handle SIGTRAP nostop noprint", // For some reason we receive a lot of spurious sigtraps
"-ex", "set confirm on", //reenable confirmations
"-ex", "c", //start running
nullptr};
execvp(args[0], (char* const*)args);
panic("shouldn't reach this...");
} else {
return childPid;
}
}
