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Re: Add tests that backtrace and backtrace_symbols produce correct results

"Joseph S. Myers" <> writes:

> I'd expect there to be unwind information for read as it's a cancellation 
> point; the tests themselves are explicitly built with unwind information.  

This is not a multithreaded program, and read is invisible because it
does not create a frame in that case.

$ cat debug/tst-backtrace5.out
Obtained backtrace with 7 functions
Function 0: /home/andreas/src/libc/ppc/debug/tst-backtrace5(handle_signal+0x2c) [0x1000130c]
Function 1: [0x100394]
Function 2: /home/andreas/src/libc/ppc/debug/tst-backtrace5(fn+0x90) [0x100017c0]
Function 3: /home/andreas/src/libc/ppc/debug/tst-backtrace5(fn+0x20) [0x10001750]
Function 4: /home/andreas/src/libc/ppc/debug/tst-backtrace5(fn+0x20) [0x10001750]
Function 5: /home/andreas/src/libc/ppc/debug/tst-backtrace5() [0x10001834]
Function 6: /home/andreas/src/libc/ppc/debug/tst-backtrace5(main+0x370) [0x10001170]


Andreas Schwab,
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