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Make 'run-until-faulted.py' script more interesting by modifying the example main.c program 

to seg fault randomly instead of deterministically.

Example:

[15:10:43] johnny:/Volumes/data/lldb/svn/trunk/utils/test $ clang -g main.c
[15:10:46] johnny:/Volumes/data/lldb/svn/trunk/utils/test $ ./run-until-faulted.py -l $PWD/../../build/Debug/lldb -e a.out
lldb command: /Volumes/data/lldb/svn/trunk/utils/test/../../build/Debug/lldb
executable: a.out
executable options: 
(lldb) sending 'file a.out' command...
file a.out
Current executable set to 'a.out' (x86_64).
(lldb) sending 'process launch -- ' command... (iteration: 0)
process launch -- 
Process 63630 launched: '/Volumes/data/lldb/svn/trunk/utils/test/a.out' (x86_64)
Hello, fault!
val=9
Better luck next time!
Process 63630 exited with status = 0 (0x00000000) 
(lldb) sending 'process launch -- ' command... (iteration: 1)
process launch -- 
Process 63633 launched: '/Volumes/data/lldb/svn/trunk/utils/test/a.out' (x86_64)
Process 63633 exited with status = 0 (0x00000000) 
sending 'process launch -- ' command... (iteration: 2)
Hello, fault!
val=0
Better luck next time!
(lldb) process launch -- 
Process 63637 launched: '/Volumes/data/lldb/svn/trunk/utils/test/a.out' (x86_64)
Hello, fault!
val=15
Better luck next time!
Process 63637 exited with status = 0 (0x00000000) 
(lldb) sending 'process launch -- ' command... (iteration: 3)
process launch -- 
Process 63640 launched: '/Volumes/data/lldb/svn/trunk/utils/test/a.out' (x86_64)
Hello, fault!
val=2
Better luck next time!
Process 63640 exited with status = 0 (0x00000000) 
sending 'process launch -- ' command... (iteration: 4)
(lldb) process launch -- 
Process 63643 launched: '/Volumes/data/lldb/svn/trunk/utils/test/a.out' (x86_64)
Process 63643 stopped
* thread #1: tid = 0x2d03, 0x0000000100000e93 a.out`main + 99 at main.c:11, stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
  frame #0: 0x0000000100000e93 a.out`main + 99 at main.c:11
   8   	    u_int32_t val = (arc4random() & 0x0f);
   9   	    printf("val=%u\n", val);
   10  	    if (val == 0x07) // Lucky 7 :-)
-> 11  	        printf("Now segfault %d\n", *null_ptr);
   12  	    else
   13  	        printf("Better luck next time!\n");
   14  	}
(lldb) 
* thread #1: tid = 0x2d03, 0x0000000100000e93 a.out`main + 99 at main.c:11, stop reason = EXC_BAD_ACCESS (code=1, address=0x0)
  frame #0: 0x0000000100000e93 a.out`main + 99 at main.c:11
   8   	    u_int32_t val = (arc4random() & 0x0f);
   9   	    printf("val=%u\n", val);
   10  	    if (val == 0x07) // Lucky 7 :-)
-> 11  	        printf("Now segfault %d\n", *null_ptr);
   12  	    else
   13  	        printf("Better luck next time!\n");
   14  	}
Hello, fault!
val=7
(lldb) 

llvm-svn: 132430
This commit is contained in:
Johnny Chen 2011-06-01 22:12:27 +00:00
parent 324f843107
commit 8831e18b17
2 changed files with 13 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
lldb/utils/test/main.c
View File

@ -1,8 +1,14 @@
#include <stdio.h>
#include <stdlib.h>
int main(int argc, const char* argv[])
{
int *null_ptr = 0;
printf("Hello, fault!\n");
printf("Now segfault %d\n", *null_ptr);
u_int32_t val = (arc4random() & 0x0f);
printf("val=%u\n", val);
if (val == 0x07) // Lucky 7 :-)
printf("Now segfault %d\n", *null_ptr);
else
printf("Better luck next time!\n");
}

19
lldb/utils/test/run-until-faulted.py
View File

@ -33,31 +33,25 @@ def do_lldb_launch_loop(lldb_command, exe, exe_options):
prompt = "\(lldb\) "
lldb = pexpect.spawn(lldb_command)
# Turn on logging for what lldb sends back.
#lldb.logfile_read = sys.stdout
lldb.logfile_read = sys.stdout
lldb.expect(prompt)
# Now issue the file command.
print "sending file command...."
print "sending 'file %s' command..." % exe
lldb.sendline('file %s' % exe)
lldb.expect(prompt)
#print "lldb.buffer:--->", lldb.buffer, "<---"
#print "lldb.before:--->", lldb.before, "<---"
#print "lldb.after:--->", lldb.buffer, "<----"
# Loop until it faults....
count = 0
#while True:
# count = count + 1
for i in range(10):
for i in range(100):
count = i
print "sending process launch -- %s (iteration: %d)" % (exe_options, count)
print "sending 'process launch -- %s' command... (iteration: %d)" % (exe_options, count)
lldb.sendline('process launch -- %s' % exe_options)
index = lldb.expect(['Process .* exited with status',
'Process .* stopped',
pexpect.TIMEOUT])
#print "lldb.buffer:--->", lldb.buffer, "<---"
#print "lldb.before:--->", lldb.before, "<----"
#print "lldb.after:--->", lldb.buffer, "<----"
if index == 0:
# We'll try again later.
time.sleep(3)
@ -78,10 +72,9 @@ def main():
sys.path.append(os.path.join(scriptPath, os.pardir, os.pardir, 'test', 'pexpect-2.4'))
parser = OptionParser(usage="""\
%prog [options]
Run a program via lldb until it fails.
The lldb executable is located via your PATH env variable, if not specified.
Usage: %prog [options]
The lldb executable is located via your PATH env variable, if not specified.\
""")
parser.add_option('-l', '--lldb-command',
type='string', action='store', metavar='LLDB_COMMAND',