Reopening binary using "do" via HTTP makes binary stdout lost.

[akrasuski1]

Check out this log:

[0x7f0c3b34fcd0]> =h
Starting http server...
open http://localhost:9090/
r2 -C http://localhost:9090/cmd/
[HTTP] 127.0.0.1:58752 /cmd/db%20main
[HTTP] 127.0.0.1:58754 /cmd/dc;dcr
hit breakpoint at: 400536
Debugging pid = 25437, tid = 1 now
Test...
hit breakpoint at: 400544
[HTTP] 127.0.0.1:58756 /cmd/do
Wait event received by different pid 25437
Process with PID 25443 started...
File dbg://./a.out reopened in read-write mode
Debugging pid = 25443, tid = 25443 now
Assuming filepath ./a.out
Attached debugger to pid = 25443, tid = 25443
[HTTP] 127.0.0.1:58758 /cmd/dc;dcr
hit breakpoint at: 400536
Debugging pid = 25443, tid = 1 now
hit breakpoint at: 400544

The debugged binary was just puts("Test...") in main - so it should print it. In the first time, continuing until return from main did it, but when later I issued do (reopen binary) and requested same commands, no string was printed. This happens only in HTTP mode - this is equivalent log from radare2 usual console:

[0x7fef51610cd0]> db main
[0x7fef51610cd0]> dc; dcr
hit breakpoint at: 400536
Debugging pid = 25495, tid = 1 now
Test...
hit breakpoint at: 400544
[0x00400536]> do
Wait event received by different pid 25495
Process with PID 25496 started...
File dbg://./a.out reopened in read-write mode
Debugging pid = 25496, tid = 25496 now
Assuming filepath ./a.out
Attached debugger to pid = 25496, tid = 25496
[0x7f604f4becd0]> dc;dcr
hit breakpoint at: 400536
Debugging pid = 25496, tid = 1 now
Test...
hit breakpoint at: 400544

As expected, "Test..." is printed twice, one time for each instance of binary ran.

[radare]

confirmed. i can reproduce this issue

On 14 Jan 2016, at 21:02, akrasuski1 [email protected] wrote:

Check out this log:

[0x7f0c3b34fcd0]> =h Starting http server... open http://localhost:9090/ r2 -C http://localhost:9090/cmd/ [HTTP] 127.0.0.1:58752 /cmd/db%20main [HTTP] 127.0.0.1:58754 /cmd/dc;dcr hit breakpoint at: 400536 Debugging pid = 25437, tid = 1 now Test... hit breakpoint at: 400544 [HTTP] 127.0.0.1:58756 /cmd/do Wait event received by different pid 25437 Process with PID 25443 started... File dbg://./a.out reopened in read-write mode Debugging pid = 25443, tid = 25443 now Assuming filepath ./a.out Attached debugger to pid = 25443, tid = 25443 [HTTP] 127.0.0.1:58758 /cmd/dc;dcr hit breakpoint at: 400536 Debugging pid = 25443, tid = 1 now hit breakpoint at: 400544 The debugged binary was just puts("Test...") in main - so it should print it. In the first time, continuing until return from main did it, but when later I issued do (reopen binary) and requested same commands, no string was printed. This happens only in HTTP mode - this is equivalent log from radare2 usual console:

[0x7fef51610cd0]> db main [0x7fef51610cd0]> dc; dcr hit breakpoint at: 400536 Debugging pid = 25495, tid = 1 now Test... hit breakpoint at: 400544 [0x00400536]> do Wait event received by different pid 25495 Process with PID 25496 started... File dbg://./a.out reopened in read-write mode Debugging pid = 25496, tid = 25496 now Assuming filepath ./a.out Attached debugger to pid = 25496, tid = 25496 [0x7f604f4becd0]> dc;dcr hit breakpoint at: 400536 Debugging pid = 25496, tid = 1 now Test... hit breakpoint at: 400544 As expected, "Test..." is printed twice, one time for each instance of binary ran.

— Reply to this email directly or view it on GitHub https://github.com/radare/radare2/issues/3956.

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