Software Mansion•9mo ago

bundlex nifs and libasan

Is it anyone build nifs with libasan support? Even if I put compiler_flags ["-fno-omit-frame-pointer -fsanitize=address"] it doesn't detect leaks I intentionally left in nif code. I run elixir with ERL_EXEC="cerl" and set -asan option for vm and erlang is running with address_sanitizer flag.

1 Reply

spscreamOP•9mo ago

e.g. for ex_dtls it found some leak, maybe false positive:

    #0 0x7f319eb1fa57 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
    #1 0x7f3190536ccf in export_keying_material /home/amalaev/work/sip_trunk/deps/ex_dtls/c_src/ex_dtls/dtls.c:96

-----------------------------------------------------
Suppressions used:
  count      bytes template
     70     945280 sys_thread_init_signal_stack
-----------------------------------------------------

SUMMARY: AddressSanitizer: 10002 byte(s) leaked in 171 allocation(s).

    #0 0x7f319eb1fa57 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cpp:154
    #1 0x7f3190536ccf in export_keying_material /home/amalaev/work/sip_trunk/deps/ex_dtls/c_src/ex_dtls/dtls.c:96

-----------------------------------------------------
Suppressions used:
  count      bytes template
     70     945280 sys_thread_init_signal_stack
-----------------------------------------------------

SUMMARY: AddressSanitizer: 10002 byte(s) leaked in 171 allocation(s).

but for my plugin I got no leaks found even if I put it intentionally

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bundlex nifs and libasan