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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!
[KProcess 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)
[KProcess 63633 exited with status = 0 (0x00000000)
sending 'process launch -- ' command... (iteration: 2)
[KHello, 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!
[KProcess 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!
[KProcess 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)
[KProcess 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 }
[KHello, fault!
val=7
(lldb)
llvm-svn: 132430
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