From: Abdul Basit Ijaz <abdul.b.ijaz@intel.com>
To: gdb-patches@sourceware.org
Cc: abdul.b.ijaz@intel.com, thiago.bauermann@linaro.org,
tom@tromey.com, simark@simark.ca,
Bernhard Heckel <bernhard.heckel@intel.com>
Subject: [PATCH v4 2/3] gdb, types: Resolve pointer types dynamically
Date: Thu, 4 Jan 2024 13:35:19 +0100 [thread overview]
Message-ID: <20240104123520.7706-3-abdul.b.ijaz@intel.com> (raw)
In-Reply-To: <20240104123520.7706-1-abdul.b.ijaz@intel.com>
From: Bernhard Heckel <bernhard.heckel@intel.com>
This commit allows pointers to be dynamic types (on the outmost
level). Similar to references, a pointer is considered a dynamic type
if its target type is a dynamic type and it is on the outmost level.
Also this commit removes the redundant code inside function
"value_check_printable" for handling of DW_AT_associated type.
The pointer resolution follows the one of references.
This change generally makes the GDB output more verbose. We are able to
print more details about a pointer's target like the dimension of an array.
In Fortran, if we have a pointer to a dynamic type
type buffer
real, dimension(:), pointer :: ptr
end type buffer
type(buffer), pointer :: buffer_ptr
allocate (buffer_ptr)
allocate (buffer_ptr%ptr (5))
which then gets allocated, we now resolve the dynamic type before
printing the pointer's type:
Before:
(gdb) ptype buffer_ptr
type = PTR TO -> ( Type buffer
real(kind=4) :: alpha(:)
End Type buffer )
After:
(gdb) ptype buffer_ptr
type = PTR TO -> ( Type buffer
real(kind=4) :: alpha(5)
End Type buffer )
Similarly in C++ we can dynamically resolve e.g. pointers to arrays:
int len = 3;
int arr[len];
int (*ptr)[len];
int ptr = &arr;
Once the pointer is assigned one gets:
Before:
(gdb) p ptr
$1 = (int (*)[variable length]) 0x123456
(gdb) ptype ptr
type = int (*)[variable length]
After:
(gdb) p ptr
$1 = (int (*)[3]) 0x123456
(gdb) ptype ptr
type = int (*)[3]
For more examples see the modified/added test cases.
Tested-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
---
gdb/gdbtypes.c | 7 +-
gdb/testsuite/gdb.cp/vla-cxx.cc | 4 +
gdb/testsuite/gdb.cp/vla-cxx.exp | 15 +++
gdb/testsuite/gdb.dwarf2/dynarr-ptr.exp | 16 +--
.../gdb.fortran/pointer-to-pointer.exp | 2 +-
gdb/testsuite/gdb.fortran/pointers.exp | 115 ++++++++++++++++++
gdb/testsuite/gdb.fortran/pointers.f90 | 29 +++++
gdb/valprint.c | 6 -
8 files changed, 177 insertions(+), 17 deletions(-)
create mode 100644 gdb/testsuite/gdb.fortran/pointers.exp
diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c
index 2580b4f19ee..14589eafb93 100644
--- a/gdb/gdbtypes.c
+++ b/gdb/gdbtypes.c
@@ -2042,8 +2042,10 @@ is_dynamic_type_internal (struct type *type, int top_level)
{
type = check_typedef (type);
- /* We only want to recognize references at the outermost level. */
- if (top_level && type->code () == TYPE_CODE_REF)
+ /* We only want to recognize references and pointers at the outermost
+ level. */
+ if (top_level
+ && (type->code () == TYPE_CODE_REF || type->code () == TYPE_CODE_PTR))
type = check_typedef (type->target_type ());
/* Types that have a dynamic TYPE_DATA_LOCATION are considered
@@ -2779,6 +2781,7 @@ resolve_dynamic_type_internal (struct type *type,
switch (type->code ())
{
case TYPE_CODE_REF:
+ case TYPE_CODE_PTR:
{
struct property_addr_info pinfo;
diff --git a/gdb/testsuite/gdb.cp/vla-cxx.cc b/gdb/testsuite/gdb.cp/vla-cxx.cc
index 0ecb130f676..83e238339ac 100644
--- a/gdb/testsuite/gdb.cp/vla-cxx.cc
+++ b/gdb/testsuite/gdb.cp/vla-cxx.cc
@@ -40,6 +40,10 @@ int main(int argc, char **argv)
typedef typeof (vla) &vlareftypedef;
vlareftypedef vlaref2 (vla);
container c;
+ typeof (vla) *ptr = nullptr;
+
+ // Before pointer assignment.
+ ptr = &vla;
for (int i = 0; i < z; ++i)
vla[i] = 5 + 2 * i;
diff --git a/gdb/testsuite/gdb.cp/vla-cxx.exp b/gdb/testsuite/gdb.cp/vla-cxx.exp
index 0a588220679..ade688cedda 100644
--- a/gdb/testsuite/gdb.cp/vla-cxx.exp
+++ b/gdb/testsuite/gdb.cp/vla-cxx.exp
@@ -23,6 +23,18 @@ if ![runto_main] {
return -1
}
+gdb_breakpoint [gdb_get_line_number "Before pointer assignment"]
+gdb_continue_to_breakpoint "Before pointer assignment"
+
+gdb_test "ptype ptr" "= int \\(\\*\\)\\\[3\\\]" \
+ "ptype ptr, before pointer assignment"
+
+gdb_test "print ptr" "= \\(int \\(\\*\\)\\\[3\\\]\\) 0x0" \
+ "print ptr, before pointer assignment"
+
+gdb_test "print *ptr" "Cannot access memory at address 0x0" \
+ "print *ptr, before pointer assignment"
+
gdb_breakpoint [gdb_get_line_number "vlas_filled"]
gdb_continue_to_breakpoint "vlas_filled"
@@ -33,3 +45,6 @@ gdb_test "print vlaref" " = \\(int \\(&\\)\\\[3\\\]\\) @$hex: \\{5, 7, 9\\}"
# bug being tested, it's better not to depend on the exact spelling.
gdb_test "print vlaref2" " = \\(.*\\) @$hex: \\{5, 7, 9\\}"
gdb_test "print c" " = \\{e = \\{c = @$hex\\}\\}"
+gdb_test "ptype ptr" "int \\(\\*\\)\\\[3\\\]"
+gdb_test "print ptr" "\\(int \\(\\*\\)\\\[3\\\]\\) $hex"
+gdb_test "print *ptr" " = \\{5, 7, 9\\}"
diff --git a/gdb/testsuite/gdb.dwarf2/dynarr-ptr.exp b/gdb/testsuite/gdb.dwarf2/dynarr-ptr.exp
index 26c64278103..72b79a87235 100644
--- a/gdb/testsuite/gdb.dwarf2/dynarr-ptr.exp
+++ b/gdb/testsuite/gdb.dwarf2/dynarr-ptr.exp
@@ -154,7 +154,7 @@ gdb_test "print foo.three_ptr.all'length" \
" = 3"
gdb_test "ptype foo.three_ptr.all" \
- " = array \\(<>\\) of integer"
+ " = array \\(1 \\.\\. 3\\) of integer"
# foo.three_ptr
@@ -177,7 +177,7 @@ gdb_test "print foo.three_ptr'length" \
" = 3"
gdb_test "ptype foo.three_ptr" \
- " = access array \\(<>\\) of integer"
+ " = access array \\(1 \\.\\. 3\\) of integer"
# foo.three_ptr_tdef.all
@@ -203,7 +203,7 @@ gdb_test "print foo.three_ptr_tdef.all'length" \
" = 3"
gdb_test "ptype foo.three_ptr_tdef.all" \
- " = array \\(<>\\) of integer"
+ " = array \\(1 \\.\\. 3\\) of integer"
# foo.three_ptr_tdef
@@ -226,7 +226,7 @@ gdb_test "print foo.three_ptr_tdef'length" \
" = 3"
gdb_test "ptype foo.three_ptr_tdef" \
- " = access array \\(<>\\) of integer"
+ " = access array \\(1 \\.\\. 3\\) of integer"
# foo.five_ptr.all
@@ -258,7 +258,7 @@ gdb_test "print foo.five_ptr.all'length" \
" = 5"
gdb_test "ptype foo.five_ptr.all" \
- " = array \\(<>\\) of integer"
+ " = array \\(2 \\.\\. 6\\) of integer"
# foo.five_ptr
@@ -287,7 +287,7 @@ gdb_test "print foo.five_ptr'length" \
" = 5"
gdb_test "ptype foo.five_ptr" \
- " = access array \\(<>\\) of integer"
+ " = access array \\(2 \\.\\. 6\\) of integer"
# foo.five_ptr_tdef.all
@@ -319,7 +319,7 @@ gdb_test "print foo.five_ptr_tdef.all'length" \
" = 5"
gdb_test "ptype foo.five_ptr_tdef.all" \
- " = array \\(<>\\) of integer"
+ " = array \\(2 \\.\\. 6\\) of integer"
# foo.five_ptr_tdef
@@ -348,4 +348,4 @@ gdb_test "print foo.five_ptr_tdef'length" \
" = 5"
gdb_test "ptype foo.five_ptr_tdef" \
- " = access array \\(<>\\) of integer"
+ " = access array \\(2 \\.\\. 6\\) of integer"
diff --git a/gdb/testsuite/gdb.fortran/pointer-to-pointer.exp b/gdb/testsuite/gdb.fortran/pointer-to-pointer.exp
index 0fd5fb0996f..78b7ba17588 100644
--- a/gdb/testsuite/gdb.fortran/pointer-to-pointer.exp
+++ b/gdb/testsuite/gdb.fortran/pointer-to-pointer.exp
@@ -41,7 +41,7 @@ gdb_test "print buffer" \
gdb_test "ptype buffer" \
[multi_line \
"type = PTR TO -> \\( Type l_buffer" \
- " $real4 :: alpha\\(:\\)" \
+ " $real4 :: alpha\\(5\\)" \
"End Type l_buffer \\)" ]
gdb_test "ptype buffer%alpha" "type = $real4 \\(5\\)"
diff --git a/gdb/testsuite/gdb.fortran/pointers.exp b/gdb/testsuite/gdb.fortran/pointers.exp
new file mode 100644
index 00000000000..dafea392799
--- /dev/null
+++ b/gdb/testsuite/gdb.fortran/pointers.exp
@@ -0,0 +1,115 @@
+# Copyright 2024 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+standard_testfile "pointers.f90"
+load_lib fortran.exp
+
+if {[prepare_for_testing ${testfile}.exp ${testfile} ${srcfile} \
+ {debug f90 quiet}]} {
+ return -1
+}
+
+if {![fortran_runto_main]} {
+ untested "could not run to main"
+ return -1
+}
+
+# Depending on the compiler being used, the type names can be printed
+# differently.
+set logical [fortran_logical4]
+set real [fortran_real4]
+set int [fortran_int4]
+set complex [fortran_complex4]
+
+gdb_breakpoint [gdb_get_line_number "Before pointer assignment"]
+gdb_continue_to_breakpoint "Before pointer assignment"
+gdb_test "print logp" "= \\(PTR TO -> \\( $logical \\)\\) 0x0" \
+ "print logp, not associated"
+gdb_test "print *logp" "Cannot access memory at address 0x0" \
+ "print *logp, not associated"
+gdb_test "print comp" "= \\(PTR TO -> \\( $complex \\)\\) 0x0" \
+ "print comp, not associated"
+gdb_test "print *comp" "Cannot access memory at address 0x0" \
+ "print *comp, not associated"
+gdb_test "print charp" "= \\(PTR TO -> \\( character\\*1 \\)\\) 0x0" \
+ "print charp, not associated"
+gdb_test "print *charp" "Cannot access memory at address 0x0" \
+ "print *charp, not associated"
+gdb_test "print charap" "= \\(PTR TO -> \\( character\\*3 \\)\\) 0x0" \
+ "print charap, not associated"
+gdb_test "print *charap" "Cannot access memory at address 0x0" \
+ "print *charap, not associated"
+gdb_test "print intp" "= \\(PTR TO -> \\( $int \\)\\) 0x0" \
+ "print intp, not associated"
+gdb_test "print *intp" "Cannot access memory at address 0x0" \
+ "print *intp, not associated"
+gdb_test "print intap" " = <not associated>" "print intap, not associated"
+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"
+gdb_test "print cyclicp1" "= \\( i = -?\\d+, p = 0x0 \\)" \
+ "print cyclicp1, not associated"
+gdb_test "print cyclicp1%p" \
+ "= \\(PTR TO -> \\( Type typewithpointer \\)\\) 0x0" \
+ "print cyclicp1%p, not associated"
+
+gdb_breakpoint [gdb_get_line_number "Before value assignment"]
+gdb_continue_to_breakpoint "Before value assignment"
+gdb_test "print *(twop)%ivla2" "= <not allocated>"
+
+gdb_breakpoint [gdb_get_line_number "After value assignment"]
+gdb_continue_to_breakpoint "After value assignment"
+gdb_test "print logp" "= \\(PTR TO -> \\( $logical \\)\\) $hex\( <.*>\)?"
+gdb_test "print *logp" "= \\.TRUE\\."
+gdb_test "print comp" "= \\(PTR TO -> \\( $complex \\)\\) $hex\( <.*>\)?"
+gdb_test "print *comp" "= \\(1,2\\)"
+gdb_test "print charp" "= \\(PTR TO -> \\( character\\*1 \\)\\) $hex\( <.*>\)?"
+gdb_test "print *charp" "= 'a'"
+gdb_test "print charap" "= \\(PTR TO -> \\( character\\*3 \\)\\) $hex\( <.*>\)?"
+gdb_test "print *charap" "= 'abc'"
+gdb_test "print intp" "= \\(PTR TO -> \\( $int \\)\\) $hex\( <.*>\)?"
+gdb_test "print *intp" "= 10"
+gdb_test "print intap" "= \\(\\(1, 1, 3(, 1){7}\\) \\(1(, 1){9}\\)\\)" \
+ "print intap, associated"
+gdb_test "print intvlap" "= \\(2, 2, 2, 4(, 2){6}\\)" \
+ "print intvlap, associated"
+gdb_test "print realp" "= \\(PTR TO -> \\( $real \\)\\) $hex\( <.*>\)?"
+gdb_test "print *realp" "= 3\\.14000\\d+"
+gdb_test "print arrayOfPtr(2)%p" "= \\(PTR TO -> \\( Type two \\)\\) $hex\( <.*>\)?"
+gdb_test "print *(arrayOfPtr(2)%p)" \
+ "= \\( ivla1 = \\(11, 12, 13\\), ivla2 = \\(\\(211, 221\\) \\(212, 222\\)\\) \\)"
+gdb_test "print arrayOfPtr(3)%p" "= \\(PTR TO -> \\( Type two \\)\\) 0x0" \
+ "print arrayOfPtr(3)%p"
+
+gdb_test_multiple "print *(arrayOfPtr(3)%p)" \
+ "print *(arrayOfPtr(3)%p), associated" {
+ # gfortran
+ -re -wrap "Cannot access memory at address 0x0" {
+ pass $gdb_test_name
+ }
+ # ifx
+ -re -wrap "Location address is not set." {
+ pass $gdb_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"
diff --git a/gdb/testsuite/gdb.fortran/pointers.f90 b/gdb/testsuite/gdb.fortran/pointers.f90
index 8708d505ada..0fb6b36a25c 100644
--- a/gdb/testsuite/gdb.fortran/pointers.f90
+++ b/gdb/testsuite/gdb.fortran/pointers.f90
@@ -20,14 +20,26 @@ 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
+
logical, target :: logv
complex, target :: comv
character, target :: charv
character (len=3), target :: chara
integer, target :: intv
integer, target, dimension (10,2) :: inta
+ integer, target, allocatable, dimension (:) :: intvla
real, target :: realv
type(two), target :: twov
+ type(twoPtr) :: arrayOfPtr (3)
+ type(typeWithPointer), target:: cyclicp1,cyclicp2
logical, pointer :: logp
complex, pointer :: comp
@@ -35,6 +47,7 @@ program pointers
character (len=3), pointer :: charap
integer, pointer :: intp
integer, pointer, dimension (:,:) :: intap
+ integer, pointer, dimension (:) :: intvlap
real, pointer :: realp
type(two), pointer :: twop
@@ -44,8 +57,14 @@ program pointers
nullify (charap)
nullify (intp)
nullify (intap)
+ nullify (intvlap)
nullify (realp)
nullify (twop)
+ 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
@@ -53,8 +72,14 @@ program pointers
charap => chara
intp => intv
intap => inta
+ intvlap => intvla
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)
@@ -63,6 +88,10 @@ program pointers
intv = 10
inta(:,:) = 1
inta(3,1) = 3
+ allocate (intvla(10))
+ intvla(:) = 2
+ intvla(4) = 4
+ intvlap => intvla
realv = 3.14
allocate (twov%ivla1(3))
diff --git a/gdb/valprint.c b/gdb/valprint.c
index 00943c1111a..2da435d153b 100644
--- a/gdb/valprint.c
+++ b/gdb/valprint.c
@@ -1156,12 +1156,6 @@ value_check_printable (struct value *val, struct ui_file *stream,
return 0;
}
- if (type_not_associated (val->type ()))
- {
- val_print_not_associated (stream);
- return 0;
- }
-
if (type_not_allocated (val->type ()))
{
val_print_not_allocated (stream);
--
2.34.1
Intel Deutschland GmbH
Registered Address: Am Campeon 10, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de <http://www.intel.de>
Managing Directors: Christin Eisenschmid, Sharon Heck, Tiffany Doon Silva
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928
next prev parent reply other threads:[~2024-01-04 12:35 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-04 12:35 [PATCH v4 0/3] Dynamic properties of pointers Abdul Basit Ijaz
2024-01-04 12:35 ` [PATCH v4 1/3] gdb/testsuite: Fix indentation issues in gdb.dwarf2/dynarr-ptr.exp Abdul Basit Ijaz
2024-01-11 17:47 ` Tom Tromey
2024-01-12 12:46 ` Ijaz, Abdul B
2024-01-04 12:35 ` Abdul Basit Ijaz [this message]
2024-01-11 17:50 ` [PATCH v4 2/3] gdb, types: Resolve pointer types dynamically Tom Tromey
2024-01-12 17:42 ` Ijaz, Abdul B
2024-01-04 12:35 ` [PATCH v4 3/3] gdb, testsuite, fortran: Fix sizeof intrinsic for Fortran pointers Abdul Basit Ijaz
2024-01-11 17:51 ` [PATCH v4 0/3] Dynamic properties of pointers Tom Tromey
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