dab-2 crash on RTLSDR selection #181
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Hi John
The error is a simple one and caused by adding code without proper testing
(I do not use a dabstick since the only one I have is mechanically
extremely weak)
The code in line 81 of the rtlsdr handler code reads
if (!theStick -> xmlDumping. load ())
theStick -> xmlWriter -> add ((std::complex<uint8_t>*)buf, len /
2);
and the "!" (the not operator) is killing here, it should be
if (theStick -> xmlDumping. load ())
theStick -> xmlWriter -> add ((std::complex<uint8_t>*)buf, len /
2);
In the erroneous case, the data from the callback is written using a
non-existent writer and file
In 3.6 is is fixed, I upgraded dab-2 such that it is (almost) functional
equivalent to qt-dab-3.6, but documentation
is not complete
Op zo 20 sep. 2020 om 22:13 schreef John Warburton <notifications@github.com
…:
Thank you for developing this.
The main program works well on this little Chromebook, self-compiled,
using Debian testing and kernel 5.8
I'm using tonight's Github master, commit 87044f9
In dab-2, the program starts but, on selecting RTLSDR, it segfaults. GDB
shows this:
Found Fitipower FC0012 tuner
Supported gain values (5): 19.2 17.9 7.1 -4.0 -9.9
Realtek RTL2838UHIDIR 00000001
channel reset: all services will be stopped
[New Thread 0x7fffab7fe700 (LWP 34572)]
Thread 23 "QThread" received signal SIGSEGV, Segmentation fault.
--Type <RET> for more, q to quit, c to continue without paging--
Switching to Thread 0x7fffab7fe700 (LWP 34909)]
0x00007ffff5f9e5e1 in __GI__IO_fwrite ***@***.***=0x55555563ab60 <buffer_uint8>, ***@***.***=1, ***@***.***=8192, fp=0x0) at iofwrite.c:35
35 iofwrite.c: No such file or directory.
[Switching to Thread 0x7fffab7fe700 (LWP 34572)]
#0 0x00005555555c0f13 in xml_fileWriter::add (this=0x0, ***@***.***=0x7fffa4003680, ***@***.***=4096) at devices-dab-2/xml-filewriter.cpp:99
99 nrElements += 2 * count;
#1 0x00005555555cc47e in RTLSDRCallBack(uint8_t*, uint32_t, void*)
(buf=0x7fffa4003680 "qr\224\206bf\177qm\222jso9tD\231~^v}mkqu\226ep\200\214s^\206h\210|\210\232\232vxf~mdK~m\245j~_u{bbtowqr\211i~t1]\202\253\220£O\201w\236\222o\217e\221\202\222\224\226s\242\213\252w\266t\243N\237d\246y\212pi\201q\255\225\205u\236\206\217\226Q\244v̎\201wtp\210\263\216r\250x\221Z\230T\230\222\224ndOm\200\224\262N\243\063\220_\206}Wy|\177\253\232\212\202}\220\222u\232\217qj\207\220\273y|ul\203rh\214Y\212\210{\211\225\235\204w\212}\224\237\230\205\230o\242\240c\225n]\232iz"..., len=8192, ctx=0x555555a167a0) at devices-dab-2/rtlsdr-handler/rtlsdr-handler.cpp:82
#2 0x00007fffd40217fd in _libusb_callback () at /usr/local/lib/librtlsdr.so
#3 0x00007fffd400a6a2 in () at /lib/x86_64-linux-gnu/libusb-1.0.so.0
#4 0x00007fffd400ef1c in () at /lib/x86_64-linux-gnu/libusb-1.0.so.0
#5 0x00007fffd40107b0 in () at /lib/x86_64-linux-gnu/libusb-1.0.so.0
#6 0x00007fffd400a0e9 in () at /lib/x86_64-linux-gnu/libusb-1.0.so.0
#7 0x00007fffd400b16c in libusb_handle_events_timeout_completed () at /lib/x86_64-linux-gnu/libusb-1.0.so.0
#8 0x00007fffd4021521 in rtlsdr_read_async () at /usr/local/lib/librtlsdr.so
#9 0x00007ffff64e3a01 in () at /lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007ffff5deeea7 in start_thread (arg=<optimized out>) at pthread_create.c:477
#11 0x00007ffff6026eaf in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
It seems to segfault when calling the XML filewriter; and doesn't handle a
"no such file or directory" error.
Before I investigate further (e.g. to find what file it may want to write
to) I thought it worth flagging the problem here first.
JW
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Thank you for developing this.
The main program works well on this little Chromebook, self-compiled, using Debian testing and kernel 5.8
I'm using tonight's Github master, commit
87044f9In dab-2, the program starts but, on selecting RTLSDR, it segfaults. GDB shows this:
It seems to segfault when calling the XML filewriter; and doesn't handle a "no such file or directory" error.
Before I investigate further (e.g. to find what file it may want to write to) I thought it worth flagging the problem here first.
JW
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