2 * Copyright (c) 2006-2007 The Regents of The University of Michigan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
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9 * redistributions in binary form must reproduce the above copyright
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14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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31 #include "tracechild.hh"
35 #include <sys/ptrace.h>
40 bool TraceChild::startTracing(const char * pathToFile
, char * const argv
[])
46 cout
<< "fork failed" << endl
;
51 //We're the child. Get things ready and then exec the
54 //Let our parent trace us
55 if(ptrace(PTRACE_TRACEME
, 0, 0, 0) == -1)
57 cout
<< "Failure calling TRACEME\n";
58 cout
<< strerror(errno
) << endl
;
62 //Set up an empty environment for the child...
63 //We would want to specify this somehow at some point
64 char * env
[] = {NULL
};
66 //Start the program to trace
67 execve(pathToFile
, argv
, env
);
69 //We should never get here, so this is an error!
70 cout
<< "Exec failed\n";
71 cout
<< strerror(errno
) << endl
;
75 //From this point forward, we know we're in the parent process.
78 cout
<< "Didn't wait successfully" << endl
;
85 bool TraceChild::stopTracing()
87 if(ptrace(PTRACE_KILL
, pid
, 0, 0) != 0)
93 bool TraceChild::step()
98 bool TraceChild::ptraceSingleStep()
102 cout
<< "Not tracing!" << endl
;
105 if(ptrace(PTRACE_SINGLESTEP
, pid
, 0, 0) != 0)
109 case EBUSY
: cout
<< "EBUSY" << endl
; break;
110 case EFAULT
: cout
<< "EFAULT" << endl
; break;
111 case EIO
: cout
<< "EIO" << endl
; break;
112 case EPERM
: cout
<< "EPERM" << endl
; break;
113 case ESRCH
: cout
<< "ESRCH" << endl
; break;
114 default: cout
<< "Unknown error" << endl
; break;
116 cout
<< "Not able to single step!" << endl
;
124 bool TraceChild::doWait()
128 if(WIFEXITED(wait_val
))
130 cerr
<< "Program exited! Exit status is "
131 << WEXITSTATUS(wait_val
) << endl
;
132 cerr
<< "Executed " << instructions
133 << " instructions." << endl
;
137 if(WIFSIGNALED(wait_val
))
139 if(WTERMSIG(wait_val
))
140 cerr
<< "Program terminated by signal "
141 << WTERMSIG(wait_val
) << endl
;
142 if(WCOREDUMP(wait_val
))
143 cerr
<< "Program core dumped!" << endl
;
145 cerr
<< "Executed " << instructions
146 << " instructions." << endl
;
149 if(WIFSTOPPED(wait_val
) && WSTOPSIG(wait_val
) != SIGTRAP
)
151 cerr
<< "Program stopped by signal "
152 << WSTOPSIG(wait_val
) << endl
;
154 cerr
<< "Executed " << instructions
155 << " instructions." << endl
;