Merge branch 'rickard/pcre-8.40'

OTP-14331

* rickard/pcre-8.40:
  Update documentation
  Update README.pcre_update.md
  Stack guard for PCRE
  Adjust for incompatibility between PCRE 8.40 and perl 5.22.1
  Generate re replacement and split tests with perl vsn 5.22.1
  Fix re_SUITE:pcre_compile_workspace_overflow/1
  Skip line with lockout of modifiers in PCRE tests
  Update tests for PCRE version 8.40
  Update PCRE to version 8.40

Conflicts:
	erts/emulator/beam/beam_debug.c

2 files changed, 4 insertions, 0 deletions

diff --git a/erts/include/internal/ethr_internal.h b/erts/include/internal/ethr_internal.h
index 6657c8affc..d42d93afc6 100644
--- a/erts/include/internal/ethr_internal.h
+++ b/erts/include/internal/ethr_internal.h
@@ -90,6 +90,7 @@ int ethr_init_common__(ethr_init_data *id);
 int ethr_late_init_common__(ethr_late_init_data *lid);
 void ethr_run_exit_handlers__(void);
 void ethr_ts_event_destructor__(void *vtsep);
+void ethr_set_stacklimit__(char *prev_c, size_t stacksize);
 
 #if defined(ETHR_X86_RUNTIME_CONF__)
 void ethr_x86_cpuid__(int *eax, int *ebx, int *ecx, int *edx);
diff --git a/erts/include/internal/ethread.h b/erts/include/internal/ethread.h
index b23644d361..9f23bd09c4 100644
--- a/erts/include/internal/ethread.h
+++ b/erts/include/internal/ethread.h
@@ -516,6 +516,9 @@ int ethr_tsd_key_delete(ethr_tsd_key);
 int ethr_tsd_set(ethr_tsd_key, void *);
 void *ethr_tsd_get(ethr_tsd_key);
 
+void *ethr_get_stacklimit(void);
+int ethr_set_stacklimit(void *limit);
+
 #ifdef ETHR_HAVE_ETHR_SIG_FUNCS
 #include <signal.h>
 int ethr_sigmask(int how, const sigset_t *set, sigset_t *oset);