tarantool / tarantool / 13477
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LAST BUILD BRANCH: ligurio/gh-xxxx-ctest-tap-support
DEFAULT BRANCH: master
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Jobs 1
Files 293
Run time 52s
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kshcherbatov 
box: fix crash in ncurses on fedora 28

Tarantool has been crashing when trying to go into an
interactive loop in ncurses-libs/libtinfo library via
lbox_console_readline.
Ncurses on Fedora 28 is compiled with flag
--fstack-clash-protection that use stack protection
mechanism (strictly speaking configure option --enable-widec
is also required, but it is not a part of problem we
investigated): gcc inserting code to step the stack down
one page at a time, running a logical-OR with zero
at each point, which doesn't affect any value on the stack
but forces a memory access:

     lea r11,[rsp-frameSize]
 label:
     sub rsp,pageSize
     or QWORD PTR [rsp],0x0
     cmp rsp,r11
     jne label

where frameSize=32768 b and pageSize=4096 b
(read also https://ldpreload.com/blog/stack-smashes-you)

Tarantool main interactive loop is working in fiber with
default stack size 65536 b

BINARY IMAGE MEMORY MAP:
_____________________________________________________

SECTION      ADDRESSES       COMMENT

DATA         0x0       ^
HEAP                   |
             0x0ec18   |  # < --fstack-clash-
                       |  #   protection check
STACK: @               |  #
       @     0x16c18   | $# < ncurses/readline
       @               | $    internals, access
       @               | $    syscall in wrapper
       @               | $
       @               | $
       @     0x1ffe0   | $  < frame0 -- LUA
             ....      |
             0xffff    |

+------+-----------------------------+-------------+
| SIGN | DESCRIPTION                 | TOTAL SIZE  |
+------+-----------------------------+-------------+
|  @   | stack area region; (fiber)  |   65536 b   |
+------+-----------------------------+-------------+
|  $   | user-space application stack|   37832 b   |
|      | memory usage                |             |
+------+-----------------------------+-------------+
|  #   | a memory that checked stack |   32768 b   |
|      | probing generated with      |     ... (continued)

38371 of 47023 relevant lines covered (81.6%)

903462.1 hits per line

Jobs
ID Job ID Ran Files Coverage
3 13477.3 (TARGET=coverage) 293
81.6
 Travis Job 13477.3
Source Files on build 13477