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
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
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
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "tracechild.hh"
33 #include <sys/ptrace.h>
39 bool TraceChild::startTracing(const char * pathToFile
, char * const argv
[])
45 cout
<< "fork failed" << endl
;
50 //We're the child. Get things ready and then exec the
53 //Let our parent trace us
54 if(ptrace(PTRACE_TRACEME
, 0, 0, 0) == -1)
56 cout
<< "Failure calling TRACEME\n";
57 cout
<< strerror(errno
) << endl
;
61 //Set up an empty environment for the child...
62 //We would want to specify this somehow at some point
63 char * env
[] = {NULL
};
65 //Start the program to trace
66 execve(pathToFile
, argv
, env
);
68 //We should never get here, so this is an error!
69 cout
<< "Exec failed\n";
70 cout
<< strerror(errno
) << endl
;
74 //From this point forward, we know we're in the parent process.
77 cout
<< "Didn't wait successfully" << endl
;
83 cout
<< "Didn't update successfully!" << endl
;
89 bool TraceChild::stopTracing()
91 if(ptrace(PTRACE_KILL
, pid
, 0, 0) != 0)
97 bool TraceChild::step()
102 bool TraceChild::ptraceSingleStep()
106 cout
<< "Not tracing!" << endl
;
109 if(ptrace(PTRACE_SINGLESTEP
, pid
, 0, 0) != 0)
113 case EBUSY
: cout
<< "EBUSY" << endl
; break;
114 case EFAULT
: cout
<< "EFAULT" << endl
; break;
115 case EIO
: cout
<< "EIO" << endl
; break;
116 case EPERM
: cout
<< "EPERM" << endl
; break;
117 case ESRCH
: cout
<< "ESRCH" << endl
; break;
118 default: cout
<< "Unknown error" << endl
; break;
120 cout
<< "Not able to single step!" << endl
;
128 bool TraceChild::doWait()
132 if(WIFEXITED(wait_val
))
134 cerr
<< "Program exited! Exit status is "
135 << WEXITSTATUS(wait_val
) << endl
;
136 cerr
<< "Executed " << instructions
137 << " instructions." << endl
;
141 if(WIFSIGNALED(wait_val
))
143 if(WTERMSIG(wait_val
))
144 cerr
<< "Program terminated by signal "
145 << WTERMSIG(wait_val
) << endl
;
146 if(WCOREDUMP(wait_val
))
147 cerr
<< "Program core dumped!" << endl
;
149 cerr
<< "Executed " << instructions
150 << " instructions." << endl
;
153 if(WIFSTOPPED(wait_val
) && WSTOPSIG(wait_val
) != SIGTRAP
)
155 cerr
<< "Program stopped by signal "
156 << WSTOPSIG(wait_val
) << endl
;
158 cerr
<< "Executed " << instructions
159 << " instructions." << endl
;