Temporary / for CI.

Author: xclerc

ocaml/runtime/amd64.S

@@ -545,6 +545,23 @@ LBL(caml_call_gc):
 CFI_ENDPROC
 ENDFUNCTION(G(caml_call_gc))
 
+FUNCTION(G(caml_raise_stack_overflow_XXX))
+CFI_STARTPROC
+        CFI_SIGNAL_FRAME
+        ENTER_FUNCTION
+LBL(caml_raise_stack_overflow_XXX):
+        SAVE_ALL_REGS
+        movq    %r15, Caml_state(gc_regs)
+        SWITCH_OCAML_TO_C
+        C_call (GCALL(caml_raise_stack_overflow))
+        SWITCH_C_TO_OCAML
+        movq    Caml_state(gc_regs), %r15
+        RESTORE_ALL_REGS
+        LEAVE_FUNCTION
+        ret
+CFI_ENDPROC
+ENDFUNCTION(G(caml_raise_stack_overflow_XXX))
+
 FUNCTION(G(caml_alloc1))
 CFI_STARTPROC
         ENTER_FUNCTION

ocaml/runtime/signals_nat.c

@@ -15,6 +15,10 @@
 
 #define CAML_INTERNALS
 
+#include <unistd.h>
+#define __USE_GNU
+#include <sys/ucontext.h>
+
 /* Signal handling, code specific to the native-code compiler */
 
 #include <signal.h>
@@ -93,7 +97,8 @@ void caml_garbage_collection(void)
   sigact.sa_sigaction = (void (*)(int,siginfo_t *,void *)) (name);    \
   sigact.sa_flags = SA_SIGINFO
 
-#include <unistd.h>
+
+CAMLextern void caml_raise_stack_overflow_XXX(void);
 
 DECLARE_SIGNAL_HANDLER(segv_handler)
 {
@@ -104,7 +109,7 @@ DECLARE_SIGNAL_HANDLER(segv_handler)
   char* protected_low = (char *) block + page_size;
   char* protected_high = protected_low + page_size;
   if ((fault_addr >= protected_low) && (fault_addr < protected_high)) {
-    caml_raise_stack_overflow();
+    context->uc_mcontext.gregs[REG_RIP]= (greg_t) &caml_raise_stack_overflow_XXX;
   } else {
     act.sa_handler = SIG_DFL;
     act.sa_flags = 0;

ocaml/testsuite/tests/runtime-errors/stackoverflow.ml

@@ -6,7 +6,6 @@
 
 
 
-*)
 
 let rec f x =
   if not (x = 0 || x = 10000 || x = 20000)

ocaml/testsuite/tests/runtime-errors/stackoverflow.opt.reference

@@ -6,5 +6,5 @@ x = 20000
 x = 10000
 x = 0
 second Stack overflow caught
-Called from Stackoverflow in file "stackoverflow.ml", line 35, characters 4-47
+Called from Stackoverflow in file "stackoverflow.ml", line 34, characters 4-47
 !p = 42