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just a proof to show that issue analysis is correct
hathach
commented
Feb 3, 2021
| #include "shared-bindings/microcontroller/__init__.h" | ||
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| STATIC volatile background_callback_t *callback_head, *callback_tail; | ||
| STATIC volatile background_callback_t * volatile callback_head, * volatile callback_tail; |
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I think you mean the pointer is volatile rather than the data it is pointed to. We actually can have it as
STATIC background_callback_t * volatile callback_head, * volatile callback_tail;
But I will leave it as both volatile just in case.
hathach
commented
Feb 3, 2021
| cb->prev = (background_callback_t*)callback_tail; | ||
| if (callback_tail) { | ||
| callback_tail->next = cb; | ||
| cb->prev = (background_callback_t*)callback_tail; |
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this function seem to be redundant
unconditionally schedule usb background after background_callback_reset()
hathach
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Feb 17, 2021
Merge latest CircuitPython changes (6.0.0-rc.1)
hathach
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Jul 13, 2021
asan considers that memcmp(p, q, N) is permitted to access N bytes at each
of p and q, even for values of p and q that have a difference earlier.
Accessing additional values is frequently done in practice, reading 4 or
more bytes from each input at a time for efficiency, so when completing
"non_exist<TAB>" in the repl, this causes a diagnostic:
==16938==ERROR: AddressSanitizer: global-buffer-overflow on
address 0x555555cd8dc8 at pc 0x7ffff726457b bp 0x7fffffffda20 sp 0x7fff
READ of size 9 at 0x555555cd8dc8 thread T0
#0 0x7ffff726457a (/usr/lib/x86_64-linux-gnu/libasan.so.5+0xb857a)
#1 0x555555b0e82a in mp_repl_autocomplete ../../py/repl.c:301
adafruit#2 0x555555c89585 in readline_process_char ../../lib/mp-readline/re
adafruit#3 0x555555c8ac6e in readline ../../lib/mp-readline/readline.c:513
adafruit#4 0x555555b8dcbd in do_repl /home/jepler/src/micropython/ports/uni
adafruit#5 0x555555b90859 in main_ /home/jepler/src/micropython/ports/unix/
adafruit#6 0x555555b90a3a in main /home/jepler/src/micropython/ports/unix/m
adafruit#7 0x7ffff619a09a in __libc_start_main ../csu/libc-start.c:308
adafruit#8 0x55555595fd69 in _start (/home/jepler/src/micropython/ports/uni
0x555555cd8dc8 is located 0 bytes to the right of global variable
'import_str' defined in '../../py/repl.c:285:23' (0x555555cd8dc0) of
size 8
'import_str' is ascii string 'import '
Signed-off-by: Jeff Epler <jepler@gmail.com>
hathach
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Jun 29, 2023
Board files for LOLIN S3 MINI
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just a proof to show that issue analysis is correct
@dhalbert @tannewt