[lldb-dev] [Bug 23371] New: Setting up stdio redirection does not work if inferior started in synchronous mode (-o run)

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23371

            Bug ID: 23371
           Summary: Setting up stdio redirection does not work if inferior
                    started in synchronous mode (-o run)
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at cs.uiuc.edu
          Reporter: labath at google.com
    Classification: Unclassified

I think the example says it all:

$ cat a.c
#include <stdio.h>

int main()
{
    int i;
    printf("enter a number: ");
    scanf("%d", &i);
    printf("got %d\n", i);
    return 0;
}
$ gcc a.c
$ lldb a.out -o run
(lldb) target create "a.out"
Current executable set to 'a.out' (x86_64).
(lldb) run
enter a number: 47
42
...
^CProcess 6656 stopped
* thread #1: tid = 6656, 0x00007ffff7b00810 libc.so.6`__GI___read + 16, name =
'a.out', stop reason = signal SIGSTOP
    frame #0: 0x00007ffff7b00810 libc.so.6`__GI___read + 16
libc.so.6`__GI___read:
->  0x7ffff7b00810 <+16>: cmpq   $-0xfff, %rax
    0x7ffff7b00816 <+22>: jae    0x7ffff7b00849            ; <+73>
    0x7ffff7b00818 <+24>: retq   

libc.so.6`???:
    0x7ffff7b00819 <+25>: subq   $0x8, %rsp

Process 6656 launched: '/usr/local/google/home/labath/ll/build/dbg/a.out'
(x86_64)

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