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make more portable #55

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shawnl opened this issue Oct 14, 2019 · 10 comments
Open

make more portable #55

shawnl opened this issue Oct 14, 2019 · 10 comments

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@shawnl
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shawnl commented Oct 14, 2019 •
edited

mesh uses many symbols from glibc, and I didn't manage to build it against musl either. I was interested in investigating using it as an allocator for zig, which does not use libc (and implements its own, as llvm does require some libc symbols).

shawn@shawn-ThinkPad-L420:~/git/mesh$ readelf --dyn-syms libmesh.so | grep GLIBC
     2: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strtof_l@GLIBC_2.2.5 (2)
     4: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mprotect@GLIBC_2.2.5 (2)
     5: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fileno@GLIBC_2.2.5 (2)
     6: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strcoll_l@GLIBC_2.2.5 (2)
     7: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __nl_langinfo_l@GLIBC_2.2.5 (2)
     8: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND dgettext@GLIBC_2.2.5 (2)
     9: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fseeko64@GLIBC_2.2.5 (2)
    10: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wmemcpy@GLIBC_2.2.5 (2)
    11: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memset@GLIBC_2.2.5 (2)
    12: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mbrtowc@GLIBC_2.2.5 (2)
    13: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND signalfd@GLIBC_2.7 (3)
    14: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcslen@GLIBC_2.2.5 (2)
    15: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND close@GLIBC_2.2.5 (4)
    16: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __duplocale@GLIBC_2.2.5 (2)
    17: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ioctl@GLIBC_2.2.5 (2)
    18: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND abort@GLIBC_2.2.5 (2)
    19: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memchr@GLIBC_2.2.5 (2)
    20: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND clock_gettime@GLIBC_2.17 (5)
    22: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __printf_chk@GLIBC_2.3.4 (6)
    23: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND bindtextdomain@GLIBC_2.2.5 (2)
    24: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wmemcmp@GLIBC_2.2.5 (2)
    25: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strftime_l@GLIBC_2.3 (7)
    26: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND setvbuf@GLIBC_2.2.5 (2)
    27: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __register_atfork@GLIBC_2.3.2 (8)
    28: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strxfrm_l@GLIBC_2.2.5 (2)
    30: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mbsnrtowcs@GLIBC_2.2.5 (2)
    31: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND read@GLIBC_2.2.5 (4)
    32: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fopen@GLIBC_2.2.5 (2)
    33: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND __free_hook@GLIBC_2.2.5 (2)
    34: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND gettext@GLIBC_2.2.5 (2)
    35: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND unlink@GLIBC_2.2.5 (2)
    36: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND __malloc_hook@GLIBC_2.2.5 (2)
    37: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND rmdir@GLIBC_2.2.5 (2)
    38: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtold_l@GLIBC_2.3 (7)
    39: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sched_yield@GLIBC_2.2.5 (2)
    40: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ungetwc@GLIBC_2.2.5 (2)
    41: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wctype_l@GLIBC_2.2.5 (2)
    42: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __cxa_atexit@GLIBC_2.2.5 (2)
    43: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getpid@GLIBC_2.2.5 (2)
    44: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_init@GLIBC_2.2.5 (4)
    45: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __vsnprintf_chk@GLIBC_2.3.4 (6)
    46: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __towupper_l@GLIBC_2.2.5 (2)
    47: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wcsxfrm_l@GLIBC_2.2.5 (2)
    48: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __fxstat64@GLIBC_2.2.5 (2)
    49: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND iconv_open@GLIBC_2.2.5 (2)
    52: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strnlen@GLIBC_2.2.5 (2)
    53: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ungetc@GLIBC_2.2.5 (2)
    54: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wcscoll_l@GLIBC_2.2.5 (2)
    55: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fputc@GLIBC_2.2.5 (2)
    56: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strlen@GLIBC_2.2.5 (2)
    58: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wmemchr@GLIBC_2.2.5 (2)
    59: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __ctype_get_mb_cur_max@GLIBC_2.2.5 (2)
    60: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND __cxa_finalize@GLIBC_2.2.5 (2)
    61: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wctob@GLIBC_2.2.5 (2)
    62: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wcsftime_l@GLIBC_2.3 (7)
    63: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __iswctype_l@GLIBC_2.2.5 (2)
    64: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __tls_get_addr@GLIBC_2.3 (9)
    65: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND stdin@GLIBC_2.2.5 (2)
    66: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fdopen@GLIBC_2.2.5 (2)
    67: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND syscall@GLIBC_2.2.5 (2)
    68: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pipe@GLIBC_2.2.5 (2)
    69: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND iconv@GLIBC_2.2.5 (2)
    71: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __newlocale@GLIBC_2.2.5 (2)
    72: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND poll@GLIBC_2.2.5 (2)
    73: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strerror@GLIBC_2.2.5 (2)
    74: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strstr@GLIBC_2.2.5 (2)
    75: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fputs@GLIBC_2.2.5 (2)
    76: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND lseek@GLIBC_2.2.5 (4)
    77: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtol@GLIBC_2.2.5 (2)
    78: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mbsrtowcs@GLIBC_2.2.5 (2)
    79: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcrtomb@GLIBC_2.2.5 (2)
    80: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND putwc@GLIBC_2.2.5 (2)
    81: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND __realloc_hook@GLIBC_2.2.5 (2)
    82: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND raise@GLIBC_2.2.5 (4)
    83: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND putc@GLIBC_2.2.5 (2)
    84: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND _Exit@GLIBC_2.2.5 (2)
    85: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memmove@GLIBC_2.2.5 (2)
    86: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND vsnprintf@GLIBC_2.2.5 (2)
    87: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fread@GLIBC_2.2.5 (2)
    88: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wmemmove@GLIBC_2.2.5 (2)
    89: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __fxstat@GLIBC_2.2.5 (2)
    90: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getenv@GLIBC_2.2.5 (2)
    91: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sendfile@GLIBC_2.2.5 (2)
    93: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND dl_iterate_phdr@GLIBC_2.2.5 (2)
    94: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __errno_location@GLIBC_2.2.5 (4)
    95: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND __memalign_hook@GLIBC_2.2.5 (2)
    96: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND madvise@GLIBC_2.2.5 (2)
    97: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strdup@GLIBC_2.2.5 (2)
    98: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mkstemp@GLIBC_2.2.5 (2)
    99: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sigaddset@GLIBC_2.2.5 (2)
   100: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __uselocale@GLIBC_2.3 (7)
   101: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __stack_chk_fail@GLIBC_2.4 (10)
   102: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strcmp@GLIBC_2.2.5 (2)
   103: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strtod_l@GLIBC_2.2.5 (2)
   104: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strcpy@GLIBC_2.2.5 (2)
   105: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getwc@GLIBC_2.2.5 (2)
   106: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND pthread_once@GLIBC_2.2.5 (4)
   107: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memcmp@GLIBC_2.2.5 (2)
   108: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND munmap@GLIBC_2.2.5 (2)
   109: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND writev@GLIBC_2.2.5 (2)
   110: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fclose@GLIBC_2.2.5 (2)
   111: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strncpy@GLIBC_2.2.5 (2)
   112: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND lseek64@GLIBC_2.2.5 (4)
   113: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND dlsym@GLIBC_2.2.5 (11)
   114: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __libc_current_sigrtmin@GLIBC_2.2.5 (4)
   115: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __freelocale@GLIBC_2.2.5 (2)
   116: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND bind_textdomain_codeset@GLIBC_2.2.5 (2)
   117: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcsnrtombs@GLIBC_2.2.5 (2)
   118: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __sprintf_chk@GLIBC_2.3.4 (6)
   119: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fallocate@GLIBC_2.10 (12)
   120: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND stderr@GLIBC_2.2.5 (2)
   121: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND btowc@GLIBC_2.2.5 (2)
   122: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ftruncate@GLIBC_2.2.5 (2)
   123: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __snprintf_chk@GLIBC_2.3.4 (6)
   124: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sigemptyset@GLIBC_2.2.5 (2)
   125: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND __pthread_key_create@GLIBC_2.2.5 (4)
   126: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fopen64@GLIBC_2.2.5 (2)
   127: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtoll@GLIBC_2.2.5 (2)
   128: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcscmp@GLIBC_2.2.5 (2)
   129: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fwrite@GLIBC_2.2.5 (2)
   130: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_lock@GLIBC_2.2.5 (4)
   132: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND setlocale@GLIBC_2.2.5 (2)
   133: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_destroy@GLIBC_2.2.5 (4)
   134: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND write@GLIBC_2.2.5 (4)
   135: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ftello64@GLIBC_2.2.5 (2)
   136: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtoul@GLIBC_2.2.5 (2)
   137: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_unlock@GLIBC_2.2.5 (4)
   138: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memcpy@GLIBC_2.14 (13)
   139: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fcntl@GLIBC_2.2.5 (2)
   140: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND open@GLIBC_2.2.5 (4)
   141: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mmap@GLIBC_2.2.5 (2)
   142: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND iconv_close@GLIBC_2.2.5 (2)
   143: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __towlower_l@GLIBC_2.2.5 (2)
   144: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND stdout@GLIBC_2.2.5 (2)
   145: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mkdir@GLIBC_2.2.5 (2)
   146: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wmemset@GLIBC_2.2.5 (2)
   147: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fflush@GLIBC_2.2.5 (2)
   148: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getc@GLIBC_2.2.5 (2)
@shawnl
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shawnl commented Oct 14, 2019 •
edited

You are also monkey-patching epoll_wait and stuff. Maybe there should be a "light" version that only provides malloc, realloc, calloc and free, along with a sized free and a few mesh_* functions.

@bpowers
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bpowers commented Oct 17, 2019

most of those are pulled in indirectly. let me see what I can do. very open to a light version.

@bobby-stripe bobby-stripe mentioned this issue Oct 17, 2019
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@bobby-stripe
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its not much shorter yet, but our full list of symbols is now:

$ readelf --dyn-syms libmesh.so

Symbol table '.dynsym' contains 167 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND __gmon_start__
     2: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _ITM_deregisterTMCloneTab
     3: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _ITM_registerTMCloneTable
     4: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND __cxa_finalize@GLIBC_2.2.5 (2)
     5: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND unlink@GLIBC_2.2.5 (2)
     6: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fcntl@GLIBC_2.2.5 (2)
     7: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND write@GLIBC_2.2.5 (3)
     8: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getpid@GLIBC_2.2.5 (2)
     9: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND pthread_once@GLIBC_2.2.5 (3)
    10: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strlen@GLIBC_2.2.5 (2)
    11: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __stack_chk_fail@GLIBC_2.4 (4)
    12: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __register_atfork@GLIBC_2.3.2 (5)
    13: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND read@GLIBC_2.2.5 (3)
    14: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sigemptyset@GLIBC_2.2.5 (2)
    15: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memcpy@GLIBC_2.14 (6)
    16: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_unlock@GLIBC_2.2.5 (3)
    17: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND open@GLIBC_2.2.5 (3)
    18: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_lock@GLIBC_2.2.5 (3)
    19: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND clock_gettime@GLIBC_2.2.5 (7)
    20: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __cxa_atexit@GLIBC_2.2.5 (2)
    21: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND syscall@GLIBC_2.2.5 (2)
    22: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND __pthread_key_create@GLIBC_2.2.5 (3)
    23: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mmap@GLIBC_2.2.5 (2)
    24: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_destroy@GLIBC_2.2.5 (3)
    25: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND abort@GLIBC_2.2.5 (2)
    26: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_init@GLIBC_2.2.5 (3)
    27: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND munmap@GLIBC_2.2.5 (2)
    28: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strcmp@GLIBC_2.2.5 (2)
    29: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND close@GLIBC_2.2.5 (3)
    30: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND lseek@GLIBC_2.2.5 (3)
    31: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __errno_location@GLIBC_2.2.5 (3)
    32: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sendfile@GLIBC_2.2.5 (2)
    33: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtoll@GLIBC_2.2.5 (2)
    34: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strerror@GLIBC_2.2.5 (2)
    35: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sigaddset@GLIBC_2.2.5 (2)
    36: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __libc_current_sigrtmin@GLIBC_2.2.5 (3)
    37: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND signalfd@GLIBC_2.7 (8)
    38: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sched_yield@GLIBC_2.2.5 (2)
    39: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND raise@GLIBC_2.2.5 (3)
    40: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND _Exit@GLIBC_2.2.5 (2)
    41: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strstr@GLIBC_2.2.5 (2)
    42: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtol@GLIBC_2.2.5 (2)
    43: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND dlsym@GLIBC_2.2.5 (9)
    44: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mkdir@GLIBC_2.2.5 (2)
    45: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fallocate@GLIBC_2.10 (10)
    46: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mprotect@GLIBC_2.2.5 (2)
    47: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mkstemp@GLIBC_2.2.5 (2)
    48: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ftruncate@GLIBC_2.2.5 (2)
    49: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pipe@GLIBC_2.2.5 (2)
    50: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strcat_chk@GLIBC_2.3.4 (11)
    51: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND rmdir@GLIBC_2.2.5 (2)
    52: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __fxstat@GLIBC_2.2.5 (2)
    53: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND madvise@GLIBC_2.2.5 (2)
    54: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND snprintf@GLIBC_2.2.5 (2)
    55: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __vsnprintf_chk@GLIBC_2.3.4 (11)
    56: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getenv@GLIBC_2.2.5 (2)
    57: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strnlen@GLIBC_2.2.5 (2)
    58: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fputs@GLIBC_2.2.5 (2)
    59: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memset@GLIBC_2.2.5 (2)
    60: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memmove@GLIBC_2.2.5 (2)
    61: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fwrite@GLIBC_2.2.5 (2)
    62: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND stderr@GLIBC_2.2.5 (2)
    63: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strcpy@GLIBC_2.2.5 (2)
    64: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __tls_get_addr@GLIBC_2.3 (12)
    65: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __sprintf_chk@GLIBC_2.3.4 (11)
    66: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fputc@GLIBC_2.2.5 (2)
    67: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND stdout@GLIBC_2.2.5 (2)
    68: 0000000000000000     0 OBJECT  GLOBAL DEFAULT  UND stdin@GLIBC_2.2.5 (2)
    69: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strtof_l@GLIBC_2.2.5 (2)
    70: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strtod_l@GLIBC_2.2.5 (2)
    71: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtold_l@GLIBC_2.3 (13)
    72: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __newlocale@GLIBC_2.2.5 (2)
    73: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __freelocale@GLIBC_2.2.5 (2)
    74: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __duplocale@GLIBC_2.2.5 (2)
    75: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strdup@GLIBC_2.2.5 (2)
    76: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memcmp@GLIBC_2.2.5 (2)
    77: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __uselocale@GLIBC_2.3 (13)
    78: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wmemchr@GLIBC_2.2.5 (2)
    79: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcsnrtombs@GLIBC_2.2.5 (2)
    80: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcrtomb@GLIBC_2.2.5 (2)
    81: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memchr@GLIBC_2.2.5 (2)
    82: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mbsnrtowcs@GLIBC_2.2.5 (2)
    83: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mbrtowc@GLIBC_2.2.5 (2)
    84: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __ctype_get_mb_cur_max@GLIBC_2.2.5 (2)
    85: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __nl_langinfo_l@GLIBC_2.2.5 (2)
    86: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND wcslen@GLIBC_2.2.5 (2)
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   100: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strxfrm_l@GLIBC_2.2.5 (2)
   101: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wcscoll_l@GLIBC_2.2.5 (2)
   102: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wcsxfrm_l@GLIBC_2.2.5 (2)
   103: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND vsnprintf@GLIBC_2.2.5 (2)
   104: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __strftime_l@GLIBC_2.3 (13)
   105: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __wcsftime_l@GLIBC_2.3 (13)
   106: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND bind_textdomain_codeset@GLIBC_2.2.5 (2)
   107: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND dgettext@GLIBC_2.2.5 (2)
   108: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getc@GLIBC_2.2.5 (2)
   109: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ungetc@GLIBC_2.2.5 (2)
   110: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fflush@GLIBC_2.2.5 (2)
   111: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND putc@GLIBC_2.2.5 (2)
   112: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fseeko64@GLIBC_2.2.5 (2)
   113: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ftello64@GLIBC_2.2.5 (2)
   114: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getwc@GLIBC_2.2.5 (2)
   115: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND ungetwc@GLIBC_2.2.5 (2)
   116: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND putwc@GLIBC_2.2.5 (2)
   117: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fread@GLIBC_2.2.5 (2)
   118: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND dl_iterate_phdr@GLIBC_2.2.5 (2)
   119: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strncpy@GLIBC_2.2.5 (2)
   120: 0000000000090440   347 FUNC    GLOBAL DEFAULT   16 mesh_free
   121: 00000000000918c0    54 FUNC    GLOBAL DEFAULT   16 mesh_memalign
   122: 0000000000093120    94 FUNC    GLOBAL DEFAULT   16 mesh_posix_memalign
   123: 0000000000093220    60 FUNC    GLOBAL DEFAULT   16 mesh_strdup
   124: 0000000000093380   266 FUNC    GLOBAL DEFAULT   16 _Znwm
   125: 0000000000093740   194 FUNC    GLOBAL DEFAULT   16 _ZnwmRKSt9nothrow_t
   126: 0000000000093840   266 FUNC    GLOBAL DEFAULT   16 _Znam
   127: 0000000000091ed0   515 FUNC    GLOBAL DEFAULT   16 sigaction
   128: 0000000000093180    69 FUNC    GLOBAL DEFAULT   16 mesh_aligned_alloc
   129: 0000000000093c80    61 FUNC    GLOBAL DEFAULT   16 mesh_recalloc
   130: 0000000000093180    69 FUNC    WEAK   DEFAULT   16 aligned_alloc
   131: 00000000000902c0   175 FUNC    WEAK   DEFAULT   16 malloc
   132: 00000000000931d0    80 FUNC    GLOBAL DEFAULT   16 mesh_strndup
   133: 00000000000918c0    54 FUNC    WEAK   DEFAULT   16 memalign
   134: 00000000000935c0   366 FUNC    GLOBAL DEFAULT   16 _ZdlPv
   135: 00000000000932f0     6 FUNC    GLOBAL DEFAULT   16 mesh_mallopt
   136: 0000000000093300     3 FUNC    GLOBAL DEFAULT   16 mesh_malloc_trim
   137: 0000000000093a80   366 FUNC    GLOBAL DEFAULT   16 _ZdaPv
   138: 0000000000093110     5 FUNC    WEAK   DEFAULT   16 cfree
   139: 0000000000091600   351 FUNC    WEAK   DEFAULT   16 malloc_usable_size
   140: 0000000000092200   370 FUNC    GLOBAL DEFAULT   16 pthread_create
   141: 0000000000090840  1758 FUNC    GLOBAL DEFAULT   16 mesh_realloc
   142: 0000000000091600   351 FUNC    GLOBAL DEFAULT   16 mesh_malloc_usable_size
   143: 00000000000920e0   283 FUNC    GLOBAL DEFAULT   16 sigprocmask
   144: 0000000000093340    23 FUNC    GLOBAL DEFAULT   16 mesh_mallinfo
   145: 0000000000093980   194 FUNC    GLOBAL DEFAULT   16 _ZnamRKSt9nothrow_t
   146: 0000000000093c30    72 FUNC    GLOBAL DEFAULT   16 mesh_pvalloc
   147: 0000000000091d30   199 FUNC    GLOBAL DEFAULT   16 xxmalloc_lock
   148: 0000000000092e90   636 FUNC    GLOBAL DEFAULT   16 epoll_pwait
   149: 0000000000093110     5 FUNC    GLOBAL DEFAULT   16 mesh_cfree
   150: 0000000000091b00   286 FUNC    WEAK   DEFAULT   16 calloc
   151: 0000000000092380    22 FUNC    GLOBAL DEFAULT   16 pthread_exit
   152: 00000000000923a0  2154 FUNC    GLOBAL DEFAULT   16 mesh_mallctl
   153: 0000000000093310     1 FUNC    GLOBAL DEFAULT   16 mesh_malloc_stats
   154: 00000000000906c0   347 FUNC    GLOBAL DEFAULT   16 mesh_sized_free
   155: 0000000000091e00   196 FUNC    GLOBAL DEFAULT   16 xxmalloc_unlock
   156: 0000000000093330     3 FUNC    GLOBAL DEFAULT   16 mesh_malloc_set_state
   157: 0000000000093120    94 FUNC    WEAK   DEFAULT   16 posix_memalign
   158: 0000000000090440   347 FUNC    WEAK   DEFAULT   16 free
   159: 00000000000902c0   175 FUNC    GLOBAL DEFAULT   16 mesh_malloc
   160: 0000000000091b00   286 FUNC    GLOBAL DEFAULT   16 mesh_calloc
   161: 0000000000093320     3 FUNC    GLOBAL DEFAULT   16 mesh_malloc_get_state
   162: 0000000000093bf0    58 FUNC    GLOBAL DEFAULT   16 mesh_valloc
   163: 0000000000091600   351 FUNC    WEAK   DEFAULT   16 mesh_usable_size
   164: 0000000000090840  1758 FUNC    WEAK   DEFAULT   16 realloc
   165: 0000000000092c10   628 FUNC    GLOBAL DEFAULT   16 epoll_wait
   166: 0000000000093260   131 FUNC    GLOBAL DEFAULT   16 mesh_getcwd

@bobby-stripe
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most of the symbols we depend on are still included transitively through linking against static libstdc++. I'm not sure why -- I would have expected passing -flto would remove a bunch of that, but will investigate more later.

bpowers added a commit that referenced this issue Oct 18, 2019
@bpowers
d_assert: remove unused (glibc-only) header (updates #55)
fc4bac7
bpowers added a commit that referenced this issue Oct 18, 2019
@bpowers
wrapper: don't assume linux === glibc (updates #55)
6551f2f
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bpowers commented Oct 18, 2019

once emeryberger/Heap-Layers#26 is merged into Heap-Layers, I'll update our dep, and Mesh should build under musl (I've been testing in a local alpine docker container).

@shawnl
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shawnl commented Nov 6, 2019

We are pulling in a bunch of wide character support. Not of this should be necessary.

@emeryberger
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note that this commit (emeryberger/Heap-Layers#26) was merged.

bpowers added a commit that referenced this issue Jan 2, 2020
@bpowers
build: update to latest Heap-Layers
9a73343 
updates #55
bpowers added a commit that referenced this issue Jan 2, 2020
@bpowers
src/rng: don't pull in iostream
5787669 
updates #55
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bpowers commented Jan 3, 2020

a) I think we should build against musl at this point, and b) I've made a bit more progress in general. the symbols we now depend on are down to:

Symbol table '.dynsym' contains 117 entries:
   Num:    Value          Size Type    Bind   Vis      Ndx Name
     0: 0000000000000000     0 NOTYPE  LOCAL  DEFAULT  UND 
     1: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND __gmon_start__
     2: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _ITM_deregisterTMCloneTab
     3: 0000000000000000     0 NOTYPE  WEAK   DEFAULT  UND _ITM_registerTMCloneTable
     4: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND __cxa_finalize@GLIBC_2.2.5 (2)
     5: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND unlink@GLIBC_2.2.5 (2)
     6: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fcntl@GLIBC_2.2.5 (2)
     7: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND write@GLIBC_2.2.5 (3)
     8: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND getpid@GLIBC_2.2.5 (2)
     9: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_once@GLIBC_2.2.5 (3)
    10: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strlen@GLIBC_2.2.5 (2)
    11: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __stack_chk_fail@GLIBC_2.4 (4)
    12: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __register_atfork@GLIBC_2.3.2 (5)
    13: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND read@GLIBC_2.2.5 (3)
    14: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sigemptyset@GLIBC_2.2.5 (2)
    15: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND memcpy@GLIBC_2.14 (6)
    16: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_unlock@GLIBC_2.2.5 (3)
    17: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND open@GLIBC_2.2.5 (3)
    18: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_lock@GLIBC_2.2.5 (3)
    19: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND syscall@GLIBC_2.2.5 (2)
    20: 0000000000000000     0 FUNC    WEAK   DEFAULT  UND __pthread_key_create@GLIBC_2.2.5 (3)
    21: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mmap@GLIBC_2.2.5 (2)
    22: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_destroy@GLIBC_2.2.5 (3)
    23: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND abort@GLIBC_2.2.5 (2)
    24: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND pthread_mutex_init@GLIBC_2.2.5 (3)
    25: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND munmap@GLIBC_2.2.5 (2)
    26: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strcmp@GLIBC_2.2.5 (2)
    27: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND clock_gettime@GLIBC_2.17 (7)
    28: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND close@GLIBC_2.2.5 (3)
    29: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND lseek@GLIBC_2.2.5 (3)
    30: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __errno_location@GLIBC_2.2.5 (3)
    31: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sendfile@GLIBC_2.2.5 (2)
    32: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strtoll@GLIBC_2.2.5 (2)
    33: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND strerror@GLIBC_2.2.5 (2)
    34: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sigaddset@GLIBC_2.2.5 (2)
    35: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __libc_current_sigrtmin@GLIBC_2.2.5 (3)
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    37: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND sched_yield@GLIBC_2.2.5 (2)
    38: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND raise@GLIBC_2.2.5 (3)
    39: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND _Exit@GLIBC_2.2.5 (2)
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    43: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND mkdir@GLIBC_2.2.5 (2)
    44: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND fallocate@GLIBC_2.10 (10)
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    53: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND snprintf@GLIBC_2.2.5 (2)
    54: 0000000000000000     0 FUNC    GLOBAL DEFAULT  UND __vsnprintf_chk@GLIBC_2.3.4 (11)
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I'll note two things -- first, a bunch of these symbols are simply syscall wrappers (mprotect, sendfile, etc). The others are somewhat unfortunately pulled in transitively through libstdc++ (e.g. __gnu_cxx::__verbose_terminate_handler() calls fputs) which we statically link against. Similarly, using std::mutex somewhat surprisingly pulls in std::string to deal with fatal error messages, and I don't think there is an easy out here.

We could consider switching to our own wrappers around pthread_mutex* or Google's absail, but neither are particularly small changes.

Hope this helps! let me know if you see any smaller/easier answers here!

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bpowers commented Jan 3, 2020

one more note, verbose_terminate_handler is also pulled in transitively from std::mutex, afaict

@jvoisin
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jvoisin commented Aug 11, 2022

https://github.com/daanx/mimalloc-bench is interested as well :)

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@jvoisin @shawnl @bpowers @emeryberger @bobby-stripe