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| author | Costa Tsaousis <costa@netdata.cloud> | 2022-10-13 08:04:14 +0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-10-13 08:04:14 +0300 |
| commit | 2974f525ec703329ef6ad079d8f6c685cfab11ad (patch) | |
| tree | b0e289a5fee787d764ee37cb8b5c2ac7bcd1bd20 /configure.ac | |
| parent | c805a9afad71ac96e703d599cbd6f54c29142ca7 (diff) | |
overload libc memory allocators with custom ones to trace all allocations (#13810)
* overload libc memory allocators with custom ones to trace all allocations
* grab libc pointers for external c plugins
* use -ldl when necessary; fallback to work without dlsym when it is not available
* initialize global variable
* add optional dl libs
* dynamically link every library function when needed for the first time
* prevent crashes on musl libc
* another attempt
* dont dereference function
* attempt no 3
* attempt no 4
* cleanup - all attempts failed
* dont enable tracing of allocations
* missing parenthesis
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 327cbb6c7a..68f1c8c742 100644 --- a/configure.ac +++ b/configure.ac @@ -269,6 +269,8 @@ if test "${enable_accept4}" != "no"; then AC_CHECK_FUNCS_ONCE(accept4) fi +AC_CHECK_FUNCS_ONCE(malloc_usable_size) + # ----------------------------------------------------------------------------- # operating system detection @@ -1529,6 +1531,30 @@ AC_SUBST([OPTIONAL_ATOMIC_LIBS]) AC_LANG_POP([C++]) +# ----------------------------------------------------------------------------- + +AC_MSG_CHECKING(whether we can use dlsym) +OLD_LIBS="${LIBS}" +LIBS="-ldl" +AC_LINK_IFELSE([AC_LANG_SOURCE([[ + #include <dlfcn.h> + static void *(*libc_malloc)(size_t); + int main() { + libc_malloc = dlsym(RTLD_NEXT, "malloc"); + } +]])], CAN_USE_DLSYM=yes, CAN_USE_DLSYM=no) +LIBS="${OLD_LIBS}" +AC_MSG_RESULT($CAN_USE_DLSYM) + +if test "x$CAN_USE_DLSYM" = xyes; then + AC_DEFINE([HAVE_DLSYM], [1], [dlsym usability]) + OPTIONAL_DL_LIBS="-ldl" +fi +AC_SUBST([OPTIONAL_DL_LIBS]) + +# ----------------------------------------------------------------------------- + + AC_DEFINE_UNQUOTED([NETDATA_USER], ["${with_user}"], [use this user to drop privileged]) varlibdir="${localstatedir}/lib/netdata" |