using namespace std;
-bool TraceChild::startTracing(const char * pathToFile, char * const argv[])
+bool
+TraceChild::startTracing(const char * pathToFile, char * const argv[])
{
- instructions = 0;
- pid = fork();
- if(pid == -1)
- {
- cout << "fork failed" << endl;
- return false;
+ instructions = 0;
+ pid = fork();
+ if (pid == -1) {
+ cout << "fork failed" << endl;
+ return false;
+ } else if (pid == 0) {
+ //We're the child. Get things ready and then exec the program to trace.
+ //Let our parent trace us
+ if (ptrace(PTRACE_TRACEME, 0, 0, 0) == -1) {
+ cout << "Failure calling TRACEME\n" << strerror(errno) << endl;
+ return false;
}
- else if(pid == 0)
- {
- //We're the child. Get things ready and then exec the
- //program to trace.
- //Let our parent trace us
- if(ptrace(PTRACE_TRACEME, 0, 0, 0) == -1)
- {
- cout << "Failure calling TRACEME\n";
- cout << strerror(errno) << endl;
- return false;
- }
+ //Set up an empty environment for the child... We would want to
+ //specify this somehow at some point
+ char * env[] = {NULL};
- //Set up an empty environment for the child...
- //We would want to specify this somehow at some point
- char * env[] = {NULL};
+ //Start the program to trace
+ execve(pathToFile, argv, env);
- //Start the program to trace
- execve(pathToFile, argv, env);
+ //We should never get here, so this is an error!
+ cout << "Exec failed\n" << strerror(errno) << endl;
+ return false;
+ }
- //We should never get here, so this is an error!
- cout << "Exec failed\n";
- cout << strerror(errno) << endl;
- return false;
- }
-
- //From this point forward, we know we're in the parent process.
- if(!doWait())
- {
- cout << "Didn't wait successfully" << endl;
- return false;
- }
- tracing = true;
- return true;
+ //From this point forward, we know we're in the parent process.
+ if (!doWait()) {
+ cout << "Didn't wait successfully" << endl;
+ return false;
+ }
+ tracing = true;
+ return true;
}
-bool TraceChild::stopTracing()
+bool
+TraceChild::stopTracing()
{
- if(ptrace(PTRACE_KILL, pid, 0, 0) != 0)
- return false;
- tracing = false;
- return true;
+ if (ptrace(PTRACE_KILL, pid, 0, 0) != 0)
+ return false;
+ tracing = false;
+ return true;
}
-bool TraceChild::step()
+bool
+TraceChild::step()
{
- ptraceSingleStep();
+ ptraceSingleStep();
}
-bool TraceChild::ptraceSingleStep()
+bool
+TraceChild::ptraceSingleStep()
{
- if(!tracing)
- {
- cout << "Not tracing!" << endl;
- return false;
- }
- if(ptrace(PTRACE_SINGLESTEP, pid, 0, 0) != 0)
- {
- switch(errno)
- {
- case EBUSY: cout << "EBUSY" << endl; break;
- case EFAULT: cout << "EFAULT" << endl; break;
- case EIO: cout << "EIO" << endl; break;
- case EPERM: cout << "EPERM" << endl; break;
- case ESRCH: cout << "ESRCH" << endl; break;
- default: cout << "Unknown error" << endl; break;
- }
- cout << "Not able to single step!" << endl;
- tracing == false;
- return false;
+ if (!tracing) {
+ cout << "Not tracing!" << endl;
+ return false;
+ }
+ if (ptrace(PTRACE_SINGLESTEP, pid, 0, 0) != 0) {
+ switch (errno) {
+ case EBUSY: cout << "EBUSY" << endl; break;
+ case EFAULT: cout << "EFAULT" << endl; break;
+ case EIO: cout << "EIO" << endl; break;
+ case EPERM: cout << "EPERM" << endl; break;
+ case ESRCH: cout << "ESRCH" << endl; break;
+ default: cout << "Unknown error" << endl; break;
}
- doWait();
- update(pid);
+ cout << "Not able to single step!" << endl;
+ tracing == false;
+ return false;
+ }
+ doWait();
+ update(pid);
}
-bool TraceChild::doWait()
+bool
+TraceChild::doWait()
{
- int wait_val;
- wait(&wait_val);
- if(WIFEXITED(wait_val))
- {
- cerr << "Program exited! Exit status is "
- << WEXITSTATUS(wait_val) << endl;
- cerr << "Executed " << instructions
- << " instructions." << endl;
- tracing = false;
- return false;
- }
- if(WIFSIGNALED(wait_val))
- {
- if(WTERMSIG(wait_val))
- cerr << "Program terminated by signal "
- << WTERMSIG(wait_val) << endl;
- if(WCOREDUMP(wait_val))
- cerr << "Program core dumped!" << endl;
- tracing = false;
- cerr << "Executed " << instructions
- << " instructions." << endl;
- return false;
- }
- if(WIFSTOPPED(wait_val) && WSTOPSIG(wait_val) != SIGTRAP)
- {
- cerr << "Program stopped by signal "
- << WSTOPSIG(wait_val) << endl;
- tracing = false;
- cerr << "Executed " << instructions
- << " instructions." << endl;
- return false;
- }
- return true;
+ int wait_val;
+ wait(&wait_val);
+ if (WIFEXITED(wait_val)) {
+ cerr << "Program exited! Exit status is "
+ << WEXITSTATUS(wait_val) << endl;
+ cerr << "Executed " << instructions
+ << " instructions." << endl;
+ tracing = false;
+ return false;
+ }
+ if (WIFSIGNALED(wait_val)) {
+ if (WTERMSIG(wait_val))
+ cerr << "Program terminated by signal "
+ << WTERMSIG(wait_val) << endl;
+ if (WCOREDUMP(wait_val))
+ cerr << "Program core dumped!" << endl;
+ tracing = false;
+ cerr << "Executed " << instructions
+ << " instructions." << endl;
+ return false;
+ }
+ if (WIFSTOPPED(wait_val) && WSTOPSIG(wait_val) != SIGTRAP) {
+ cerr << "Program stopped by signal " << WSTOPSIG(wait_val) << endl;
+ tracing = false;
+ cerr << "Executed " << instructions << " instructions." << endl;
+ return false;
+ }
+ return true;
}
projects / gem5.git / blobdiff