Fix up compilation and test failures

.gitignore

@@ -51,3 +51,4 @@ tests/test-proc-info
 tests/test-ptrace-misc
 tests/test-varargs
 tests/test-static-link
+tests/[GL]test-trace

include/libunwind-arm.h

@@ -297,7 +297,7 @@ unw_tdep_frame_t;
 #define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
 extern int unw_tdep_is_fpreg (int);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

include/libunwind-common.h.in

@@ -228,7 +228,6 @@ unw_save_loc_t;
 #define unw_regname		UNW_ARCH_OBJ(regname)
 #define unw_flush_cache		UNW_ARCH_OBJ(flush_cache)
 #define unw_strerror		UNW_ARCH_OBJ(strerror)
-#define unw_backtrace           UNW_OBJ(backtrace)
 
 extern unw_addr_space_t unw_create_addr_space (unw_accessors_t *, int);
 extern void unw_destroy_addr_space (unw_addr_space_t);
@@ -254,6 +253,4 @@ extern int unw_handle_signal_frame (unw_cursor_t *);
 extern int unw_get_proc_name (unw_cursor_t *, char *, size_t, unw_word_t *);
 extern const char *unw_strerror (int);
 
-extern int unw_backtrace (void **buffer, int size);
-
 extern unw_addr_space_t unw_local_addr_space;

include/libunwind-hppa.h

@@ -124,7 +124,7 @@ unw_tdep_proc_info_t;
 #define unw_tdep_getcontext		UNW_ARCH_OBJ (getcontext)
 extern int unw_tdep_getcontext (unw_tdep_context_t *);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

include/libunwind-ia64.h

@@ -193,7 +193,7 @@ extern unw_word_t _Uia64_find_dyn_list (unw_addr_space_t, unw_dyn_info_t *,
    signal-safe.  */
 extern int _Uia64_get_kernel_table (unw_dyn_info_t *);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

include/libunwind-mips.h

@@ -154,7 +154,7 @@ extern int unw_tdep_getcontext (ucontext_t *uc);
 #define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
 extern int unw_tdep_is_fpreg (int);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

include/libunwind-ppc32.h

@@ -206,7 +206,7 @@ unw_tdep_frame_t;
 #define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
 extern int unw_tdep_is_fpreg (int);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

include/libunwind-ppc64.h

@@ -263,7 +263,7 @@ unw_tdep_frame_t;
 #define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
 extern int unw_tdep_is_fpreg (int);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

include/libunwind-x86.h

@@ -186,7 +186,7 @@ extern int unw_tdep_getcontext (unw_tdep_context_t *);
 #define unw_tdep_is_fpreg		UNW_ARCH_OBJ(is_fpreg)
 extern int unw_tdep_is_fpreg (int);
 
-#define unw_tdep_trace(cur,addr,n,c)	(-UNW_ENOINFO)
+#define unw_tdep_trace(cur,addr,n)	(-UNW_ENOINFO)
 
 #if defined(__cplusplus) || defined(c_plusplus)
 }

src/mi/backtrace.c

@@ -31,32 +31,51 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
 
 /* See glibc manual for a description of this function.  */
 
-int
+static inline int
-unw_backtrace (void **buffer, int size)
+slow_backtrace (void **buffer, int size)
 {
   unw_cursor_t cursor;
-  unw_context_t uc, ucsave;
+  unw_context_t uc;
-  int n = size;
+  unw_word_t ip;
+  int n = 0;
+
+  unw_getcontext (&uc);
+  if (unw_init_local (&cursor, &uc) < 0)
+    return 0;
+
+  while (unw_step (&cursor) > 0)
+    {
+      if (n >= size)
+	return n;
+
+      if (unw_get_reg (&cursor, UNW_REG_IP, &ip) < 0)
+	return n;
+      buffer[n++] = (void *) (uintptr_t) ip;
+    }
+  return n;
+}
+
+int
+backtrace (void **buffer, int size)
+{
+  unw_cursor_t cursor;
+  unw_context_t uc;
+  int n = size;
+  int ret;
 
   unw_getcontext (&uc);
-  memcpy (&ucsave, &uc, sizeof(uc));
 
   if (unw_init_local (&cursor, &uc) < 0)
     return 0;
 
+  /* We don't need backtrace() to show up in buffer */
+  ret = unw_step (&cursor);
+  if (ret < 0)
+    return ret;
+
   if (unw_tdep_trace (&cursor, buffer, &n) < 0)
     {
-      n = 0;
+      return slow_backtrace(buffer, size);
-      unw_init_local (&cursor, &ucsave);
-      while (n < size)
-        {
-          unw_word_t ip;
-          if (unw_get_reg (&cursor, UNW_REG_IP, &ip) < 0)
-	    return n;
-          buffer[n++] = (void *) (uintptr_t) ip;
-	  if (unw_step (&cursor) <= 0)
-	    break;
-        }
     }
 
   return n;

tests/Gtest-trace.c

@@ -53,9 +53,6 @@ char buf[512], name[256];
 void *addresses[2][128];
 unw_cursor_t cursor;
 ucontext_t uc;
-#if UNW_TARGET_X86_64
-unw_tdep_frame_t *cache;
-#endif
 
 static void
 do_backtrace (void)
@@ -73,7 +70,7 @@ do_backtrace (void)
     panic ("unw_init_local failed!\n");
 
 #if UNW_TARGET_X86_64
-  if ((ret = unw_tdep_trace (&cursor, addresses[0], &depth, cache)) < 0)
+  if ((ret = unw_tdep_trace (&cursor, addresses[0], &depth)) < 0)
     {
       unw_get_reg (&cursor, UNW_REG_IP, &ip);
       printf ("FAILURE: unw_tdep_trace() returned %d for ip=%lx\n", ret, (long) ip);
@@ -211,10 +208,6 @@ main (int argc, char **argv)
   struct sigaction act;
   stack_t stk;
 
-#if UNW_TARGET_X86_64
-  cache = unw_tdep_make_frame_cache (0);
-#endif
-
   verbose = (argc > 1);
 
   if (verbose)
@@ -255,10 +248,6 @@ main (int argc, char **argv)
       exit (-1);
     }
 
-#if UNW_TARGET_X86_64
-  unw_tdep_free_frame_cache (cache);
-#endif
-
   if (verbose)
     printf ("SUCCESS.\n");
   return 0;

tests/Makefile.am

@@ -136,6 +136,7 @@ Gtest_exc_LDADD = $(LIBUNWIND)
 Gtest_init_LDADD = $(LIBUNWIND)
 Gtest_resume_sig_LDADD = $(LIBUNWIND)
 Gperf_simple_LDADD = $(LIBUNWIND)
+Gtest_trace_LDADD=$(LIBUNWIND)
 
 Ltest_bt_LDADD = $(LIBUNWIND_local)
 Ltest_concurrent_LDADD = $(LIBUNWIND_local) -lpthread
@@ -145,6 +146,8 @@ Ltest_init_LDADD = $(LIBUNWIND_local)
 Ltest_nomalloc_LDADD = $(LIBUNWIND_local) @DLLIB@
 Ltest_resume_sig_LDADD = $(LIBUNWIND)
 Lperf_simple_LDADD = $(LIBUNWIND_local)
+Ltest_trace_LDADD = $(LIBUNWIND_local)
 
 test_setjmp_LDADD = $(LIBUNWIND_setjmp)
 ia64_test_setjmp_LDADD = $(LIBUNWIND_setjmp)
+

tests/check-namespace.sh.in

@@ -123,8 +123,6 @@ check_local_unw_abi () {
 	    match _U${plat}_is_fpreg
 	    match _UL${plat}_dwarf_search_unwind_table
 	    match _U${plat}_setcontext
-            match _UL${plat}_free_frame_cache
-            match _UL${plat}_make_frame_cache
             match _UL${plat}_trace
 	    ;;
 	*)
@@ -189,8 +187,6 @@ check_generic_unw_abi () {
 	    match _U${plat}_get_elf_image
 	    match _U${plat}_is_fpreg
 	    match _U${plat}_dwarf_search_unwind_table
-            match _U${plat}_free_frame_cache
-            match _U${plat}_make_frame_cache
             match _U${plat}_trace
 	    ;;
 	*)