Follow-up Comment #2, bug #48776 (project avrdude):
Cool, thanks for looking into this!
Am unfamiliar with most debugging tools, though I did attempt to use valgrind.
In so-doing, it updated libc6, which apparently caused it to replace the
"free()" message with "Segmentation Fault".
Oddities surrounding use of 'sudo' (a few times, running sudo, it didn't
segfault, now it does. Same effect as not running sudo.).
Again, the read-process completes, the file is written, but the segfault
occurs after that.
---------------
Here's the output:
$ make read
rm -f flash.hex
valgrind --leak-check=yes avrdude -c usbtiny -pt861 -U flash:r:flash.hex:i
==2729== Memcheck, a memory error detector
==2729== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==2729== Using Valgrind-3.10.0 and LibVEX; rerun with -h for copyright info
==2729== Command: avrdude -c usbtiny -pt861 -U flash:r:flash.hex:i
==2729==
==2729== Invalid read of size 1
==2729== at 0x407ADD0: usb_parse_descriptor (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x407B709: usb_parse_configuration (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x407D08B: usb_os_find_devices (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x407A791: usb_find_devices (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x8064026: usbtiny_open (usbtiny.c:224)
==2729== by 0x804BB87: main (main.c:956)
==2729== Address 0x479cada is 0 bytes after a block of size 18 alloc'd
==2729== at 0x40291CC: malloc (vg_replace_malloc.c:296)
==2729== by 0x407D02F: usb_os_find_devices (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x407A791: usb_find_devices (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x8064026: usbtiny_open (usbtiny.c:224)
==2729== by 0x804BB87: main (main.c:956)
==2729==
avrdude: AVR device initialized and ready to accept instructions
Reading | ################################################## | 100% 0.10s
avrdude: Device signature = 0x1e930d (probably t861)
avrdude: reading flash memory:
Reading | ################################################## | 99%
22.38s==2729== Syscall param ioctl(USBDEVFS_CONTROL).data points to
unaddressable byte(s)
==2729== at 0x4214AC9: ioctl (syscall-template.S:81)
==2729== by 0x407C88C: usb_control_msg (in
/lib/i386-linux-gnu/libusb-0.1.so.4.4.4)
==2729== by 0x8063DA9: usb_in (usbtiny.c:123)
==2729== by 0x80647B7: usbtiny_paged_load (usbtiny.c:461)
==2729== by 0x804EFD5: avr_read (avr.c:405)
==2729== by 0x80650F1: do_op (update.c:236)
==2729== by 0x804C4E6: main (main.c:1227)
==2729== Address 0x4755878 is 0 bytes after a block of size 8,192 alloc'd
==2729== at 0x40291CC: malloc (vg_replace_malloc.c:296)
==2729== by 0x8050C44: avr_initmem (avrpart.c:273)
==2729== by 0x804B897: main (main.c:891)
==2729==
Reading | ################################################## | 100% 22.55s
avrdude: writing output file "flash.hex"
avrdude: safemode: Fuses OK (E:FF, H:DF, L:E1)
avrdude done. Thank you.
==2729==
==2729== HEAP SUMMARY:
==2729== in use at exit: 88,734 bytes in 99 blocks
==2729== total heap usage: 24,085 allocs, 23,986 frees, 3,700,669 bytes
allocated
==2729==
==2729== LEAK SUMMARY:
==2729== definitely lost: 0 bytes in 0 blocks
==2729== indirectly lost: 0 bytes in 0 blocks
==2729== possibly lost: 0 bytes in 0 blocks
==2729== still reachable: 88,734 bytes in 99 blocks
==2729== suppressed: 0 bytes in 0 blocks
==2729== Reachable blocks (those to which a pointer was found) are not shown.
==2729== To see them, rerun with: --leak-check=full --show-leak-kinds=all
==2729==
==2729== For counts of detected and suppressed errors, rerun with: -v
==2729== ERROR SUMMARY: 3 errors from 2 contexts (suppressed: 0 from 0)
-------------------
here's my makefile:
VALGRIND = valgrind --leak-check=yes
#VALGRIND =
MCU = t861
AVRDUDE_PROGRAMMER = usbtiny
AVRDUDE = avrdude -c $(AVRDUDE_PROGRAMMER) -p$(MCU)
read:
rm -f flash.hex
$(VALGRIND) $(AVRDUDE) -U flash:r:flash.hex:i
# $(AVRDUDE) -U eeprom:r:$(BACKUP_DIR)/eeprom.hex:i
-------------
If you've got specific instructions for what to try, lemme know.
Oh, currently it's connected via USB2.0 hub, if that helps.
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