Fortran: Testsuite, add cyclic pointers.

2016-05-25  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/testsuite/Changelog:
	* pointers.f90: Add cylic pointers.
	* pointers.exp: Add print of cyclic pointers.

Change-Id: Ic3b6187c5980fd6c37e2e94787f8321e5b7f2d75

gdb/testsuite/gdb.fortran/pointers.exp

@@ -57,6 +57,24 @@ gdb_test_multiple "print intap" $test {
 gdb_test "print realp" "= \\(PTR TO -> \\( $real \\)\\) 0x0" "print realp, not associated"
 gdb_test "print *realp" "Cannot access memory at address 0x0" "print *realp, not associated"
 gdb_test "print \$my_var = intp" "= \\(PTR TO -> \\( $int \\)\\) 0x0"
+set test "print cyclicp1, not associated"
+gdb_test_multiple "print cyclicp1" $test {
+  -re "= \\( i = -?\\d+, p = 0x0 \\)\r\n$gdb_prompt $" {
+    pass $test
+  }
+  -re "= \\( i = -?\\d+, p = <not associated> \\)\r\n$gdb_prompt $" {
+    pass $test
+  }
+}
+set test "print cyclicp1%p, not associated"
+gdb_test_multiple "print cyclicp1%p" $test {
+  -re "= \\(PTR TO -> \\( Type typewithpointer \\)\\) 0x0\r\n$gdb_prompt $" {
+    pass $test
+  }
+  -re "= \\(PTR TO -> \\( Type typewithpointer \\)\\) <not associated>\r\n$gdb_prompt $" {
+    pass $test
+  }
+}
 
 
 gdb_breakpoint [gdb_get_line_number "Before value assignment"]
@@ -118,6 +136,8 @@ gdb_test_multiple "print *(arrayOfPtr(3)%p)" $test_name {
     pass $test_name
   }
 }
+gdb_test "print cyclicp1" "= \\( i = 1, p = $hex\( <.*>\)? \\)"
+gdb_test "print cyclicp1%p" "= \\(PTR TO -> \\( Type typewithpointer \\)\\) $hex\( <.*>\)?"
 gdb_test "print *((integer*) &inta + 2)" "= 3" "print temporary pointer, array"
 gdb_test "print *((integer*) &intvla + 3)" "= 4" "print temporary pointer, allocated vla"
 gdb_test "print \$pc" "= \\(PTR TO -> \\( void \\(\\)\\(\\)\\)\\) $hex <pointers\\+\\d+>" "Print program counter"

gdb/testsuite/gdb.fortran/pointers.f90

@@ -20,6 +20,11 @@ program pointers
     integer, allocatable :: ivla2 (:, :)
   end type two
 
+  type :: typeWithPointer
+    integer i
+    type(typeWithPointer), pointer:: p
+  end type typeWithPointer
+
   type :: twoPtr
     type (two), pointer :: p
   end type twoPtr
@@ -34,6 +39,7 @@ program pointers
   real, target    :: realv
   type(two), target  :: twov
   type(twoPtr) :: arrayOfPtr (3)
+  type(typeWithPointer), target:: cyclicp1,cyclicp2
 
   logical, pointer :: logp
   complex, pointer :: comp
@@ -57,6 +63,8 @@ program pointers
   nullify (arrayOfPtr(1)%p)
   nullify (arrayOfPtr(2)%p)
   nullify (arrayOfPtr(3)%p)
+  nullify (cyclicp1%p)
+  nullify (cyclicp2%p)
 
   logp => logv    ! Before pointer assignment
   comp => comv
@@ -68,6 +76,10 @@ program pointers
   realp => realv
   twop => twov
   arrayOfPtr(2)%p => twov
+  cyclicp1%i = 1
+  cyclicp1%p => cyclicp2
+  cyclicp2%i = 2
+  cyclicp2%p => cyclicp1
 
   logv = associated(logp)     ! Before value assignment
   comv = cmplx(1,2)