Change unw_init_local_signal to unw_init_local2(..., UNW_INIT_SIGNAL_FRAME)

Add unw_init_local2 with a flag for better extensibility in the future

doc/Makefile.am

@@ -12,7 +12,7 @@ man3_MANS = libunwind.man libunwind-dynamic.man libunwind-ia64.man	\
 	unw_get_reg.man							\
 	unw_getcontext.man						\
 	unw_init_local.man unw_init_remote.man				\
-	unw_init_local_signal.man					\
+	unw_init_local2.man						\
 	unw_is_fpreg.man						\
 	unw_is_signal_frame.man						\
 	unw_create_addr_space.man					\

doc/unw_init_local.man

@@ -1,5 +1,5 @@
 '\" t
-.\" Manual page created with latex2man on Thu Mar 30 16:13:10 PDT 2017
+.\" Manual page created with latex2man on Wed Aug 16 12:11:05 PDT 2017
 .\" NOTE: This file is generated, DO NOT EDIT.
 .de Vb
 .ft CW
@@ -10,7 +10,7 @@
 
 .fi
 ..
-.TH "UNW\\_INIT\\_LOCAL" "3" "30 March 2017" "Programming Library " "Programming Library "
+.TH "UNW\\_INIT\\_LOCAL" "3" "16 August 2017" "Programming Library " "Programming Library "
 .SH NAME
 unw_init_local
 \-\- initialize cursor for local unwinding 
@@ -26,8 +26,10 @@ unw_init_local(unw_cursor_t *c,
 unw_context_t *ctxt);
 .br
 int
-unw_init_local_signal(unw_cursor_t *c,
-unw_context_t *ctxt);
+unw_init_local2(unw_cursor_t *c,
+unw_context_t *ctxt,
+int
+flag);
 .br
 .PP
 .SH DESCRIPTION
@@ -66,9 +68,9 @@ is not.
 .PP
 If the unw_context_t is known to be a signal frame (i.e., from the 
 third argument in a sigaction handler on linux), 
-unw_init_local_signal()
-should be used for correct 
-initialization on some platforms. 
+unw_init_local2()
+should be used for correct initialization 
+on some platforms, passing the UNW_INIT_SIGNAL_FRAME flag. 
 .PP
 .SH RETURN VALUE
 

doc/unw_init_local.tex

@@ -13,7 +13,7 @@
 \File{\#include $<$libunwind.h$>$}\\
 
 \Type{int} \Func{unw\_init\_local}(\Type{unw\_cursor\_t~*}\Var{c}, \Type{unw\_context\_t~*}\Var{ctxt});\\
-\Type{int} \Func{unw\_init\_local_signal}(\Type{unw\_cursor\_t~*}\Var{c}, \Type{unw\_context\_t~*}\Var{ctxt});\\
+\Type{int} \Func{unw\_init\_local2}(\Type{unw\_cursor\_t~*}\Var{c}, \Type{unw\_context\_t~*}\Var{ctxt}, \Type{int} \Var{flag});\\
 
 \section{Description}
 
@@ -39,8 +39,8 @@ is not.
 
 If the unw_context_t is known to be a signal frame (i.e., from the
 third argument in a sigaction handler on linux),
-\Func{unw\_init\_local\_signal}() should be used for correct
-initialization on some platforms.
+\Func{unw\_init\_local2}() should be used for correct initialization
+on some platforms, passing the UNW_INIT_SIGNAL_FRAME flag.
 
 \section{Return Value}
 

src/aarch64/Ginit_local.c

@@ -59,9 +59,20 @@ unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal (unw_cursor_t *cursor, unw_context_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/arm/Ginit_local.c

@@ -59,9 +59,20 @@ unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal (unw_cursor_t *cursor, unw_context_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/hppa/Ginit_local.c

@@ -58,9 +58,20 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal (unw_cursor_t *cursor, ucontext_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/mips/Ginit_local.c

@@ -57,9 +57,20 @@ unw_init_local(unw_cursor_t *cursor, ucontext_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal(unw_cursor_t *cursor, ucontext_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/ppc/Ginit_local.c

@@ -69,9 +69,20 @@ unw_init_local(unw_cursor_t *cursor, ucontext_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal(unw_cursor_t *cursor, ucontext_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/sh/Ginit_local.c

@@ -59,9 +59,20 @@ unw_init_local (unw_cursor_t *cursor, unw_context_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal (unw_cursor_t *cursor, unw_context_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/tilegx/Ginit_local.c

@@ -61,9 +61,20 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal (unw_cursor_t *cursor, ucontext_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

src/x86/Ginit_local.c

@@ -60,9 +60,20 @@ unw_init_local (unw_cursor_t *cursor, ucontext_t *uc)
 }
 
 PROTECTED int
-unw_init_local_signal (unw_cursor_t *cursor, ucontext_t *uc)
+unw_init_local2 (unw_cursor_t *cursor, ucontext_t *uc, int flag)
 {
-  return unw_init_local_common(cursor, uc, 0);
+  if (!flag)
+    {
+      return unw_init_local_common(cursor, uc, 1);
+    }
+  else if (flag == UNW_INIT_SIGNAL_FRAME)
+    {
+      return unw_init_local_common(cursor, uc, 0);
+    }
+  else
+    {
+      return -UNW_EINVAL;
+    }
 }
 
 #endif /* !UNW_REMOTE_ONLY */

tests/check-namespace.sh.in

@@ -99,7 +99,7 @@ check_local_unw_abi () {
     match _UL${plat}_get_reg
     match _UL${plat}_get_save_loc
     match _UL${plat}_init_local
-    match _UL${plat}_init_local_signal
+    match _UL${plat}_init_local2
     match _UL${plat}_init_remote
     match _UL${plat}_is_signal_frame
     match _UL${plat}_handle_signal_frame
@@ -205,7 +205,7 @@ check_generic_unw_abi () {
     match _U${plat}_get_reg
     match _U${plat}_get_save_loc
     match _U${plat}_init_local
-    match _U${plat}_init_local_signal
+    match _U${plat}_init_local2
     match _U${plat}_init_remote
     match _U${plat}_is_signal_frame
     match _U${plat}_handle_signal_frame