* [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes
@ 2020-07-01 7:01 Sharma, Alok Kumar
2020-07-01 8:20 ` Andrew Burgess
0 siblings, 1 reply; 4+ messages in thread
From: Sharma, Alok Kumar @ 2020-07-01 7:01 UTC (permalink / raw)
To: gdb-patches; +Cc: George, Jini Susan, Achra, Nitika
[-- Attachment #1: Type: text/plain, Size: 816 bytes --]
Hi All,
I request you all to please review this patch. Below are the details.
Problem Description:
Currently, GDB rejects the (die) reference form while it accepts exprloc
form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
in DWARF5 standard. Flang compiler assigns (die) reference to
DW_AT_associated and DW_AT_allocated for some cases.
Resolution:
Now ' set_die_type' Is modified to accept reference form as well.
This change will not impact testsuite for gfortran, and will fix failures for
Flang compiler with existing testsuite.
gdb/ChangeLog
* dwarf2/read.c (set_die_type): Allow reference form for
DW_AT_associated and DW_AT_allocated attributes.
Please let me know your valuable comments.
Regards,
Alok
[-- Attachment #2: 0001-Allow-reference-form-for-DW_AT_associated-and-DW_AT_.patch --]
[-- Type: application/octet-stream, Size: 2215 bytes --]
From 9a37e9973e513738234b4fed4b66d0ffc1438398 Mon Sep 17 00:00:00 2001
From: alosharm <AlokKumar.Sharma@amd.com>
Date: Wed, 1 Jul 2020 11:53:09 +0530
Subject: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated
attributes
Currently, GDB rejects the (die) reference form while it accepts exprloc
form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
in DWARF5 standard. Flang compiler assigns (die) reference to
DW_AT_associated and DW_AT_allocated for some cases.
gdb/ChangeLog
* dwarf2/read.c (set_die_type): Allow reference form for
DW_AT_associated and DW_AT_allocated attributes.
---
gdb/ChangeLog | 5 +++++
gdb/dwarf2/read.c | 4 ++--
2 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d64f572e07..75ea79471c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2020-07-01 Alok Kumar Sharma <AlokKumar.Sharma@amd.com>
+
+ * dwarf2/read.c (set_die_type): Allow reference form for
+ DW_AT_associated and DW_AT_allocated attributes.
+
2020-06-30 Tom Tromey <tromey@adacore.com>
* dwarf2/read.c (quirk_rust_enum): Correctly call
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index b097f624b6..0fba590184 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -23859,7 +23859,7 @@ set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
/* Read DW_AT_allocated and set in type. */
attr = dwarf2_attr (die, DW_AT_allocated, cu);
- if (attr != NULL && attr->form_is_block ())
+ if (attr != NULL && (attr->form_is_block () || attr->form_is_ref ()))
{
struct type *prop_type = cu->addr_sized_int_type (false);
if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
@@ -23874,7 +23874,7 @@ set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
/* Read DW_AT_associated and set in type. */
attr = dwarf2_attr (die, DW_AT_associated, cu);
- if (attr != NULL && attr->form_is_block ())
+ if (attr != NULL && (attr->form_is_block () || attr->form_is_ref ()))
{
struct type *prop_type = cu->addr_sized_int_type (false);
if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
--
2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes
2020-07-01 7:01 [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes Sharma, Alok Kumar
@ 2020-07-01 8:20 ` Andrew Burgess
2020-07-01 9:37 ` Sharma, Alok Kumar
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Burgess @ 2020-07-01 8:20 UTC (permalink / raw)
To: Sharma, Alok Kumar; +Cc: gdb-patches, George, Jini Susan, Achra, Nitika
* Sharma, Alok Kumar <AlokKumar.Sharma@amd.com> [2020-07-01 07:01:53 +0000]:
> Hi All,
>
> I request you all to please review this patch. Below are the details.
>
> Problem Description:
> Currently, GDB rejects the (die) reference form while it accepts exprloc
> form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
> in DWARF5 standard. Flang compiler assigns (die) reference to
> DW_AT_associated and DW_AT_allocated for some cases.
> Resolution:
> Now ' set_die_type' Is modified to accept reference form as well.
> This change will not impact testsuite for gfortran, and will fix failures for
> Flang compiler with existing testsuite.
>
> gdb/ChangeLog
>
> * dwarf2/read.c (set_die_type): Allow reference form for
> DW_AT_associated and DW_AT_allocated attributes.
>
> Please let me know your valuable comments.
>
> Regards,
> Alok
>
> From 9a37e9973e513738234b4fed4b66d0ffc1438398 Mon Sep 17 00:00:00 2001
> From: alosharm <AlokKumar.Sharma@amd.com>
> Date: Wed, 1 Jul 2020 11:53:09 +0530
> Subject: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated
> attributes
>
> Currently, GDB rejects the (die) reference form while it accepts exprloc
> form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
> in DWARF5 standard. Flang compiler assigns (die) reference to
> DW_AT_associated and DW_AT_allocated for some cases.
>
> gdb/ChangeLog
>
> * dwarf2/read.c (set_die_type): Allow reference form for
> DW_AT_associated and DW_AT_allocated attributes.
> ---
> gdb/ChangeLog | 5 +++++
> gdb/dwarf2/read.c | 4 ++--
> 2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/gdb/ChangeLog b/gdb/ChangeLog
> index d64f572e07..75ea79471c 100644
> --- a/gdb/ChangeLog
> +++ b/gdb/ChangeLog
> @@ -1,3 +1,8 @@
> +2020-07-01 Alok Kumar Sharma <AlokKumar.Sharma@amd.com>
> +
> + * dwarf2/read.c (set_die_type): Allow reference form for
> + DW_AT_associated and DW_AT_allocated attributes.
> +
> 2020-06-30 Tom Tromey <tromey@adacore.com>
>
> * dwarf2/read.c (quirk_rust_enum): Correctly call
> diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
> index b097f624b6..0fba590184 100644
> --- a/gdb/dwarf2/read.c
> +++ b/gdb/dwarf2/read.c
> @@ -23859,7 +23859,7 @@ set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
>
> /* Read DW_AT_allocated and set in type. */
> attr = dwarf2_attr (die, DW_AT_allocated, cu);
> - if (attr != NULL && attr->form_is_block ())
> + if (attr != NULL && (attr->form_is_block () || attr->form_is_ref ()))
> {
> struct type *prop_type = cu->addr_sized_int_type (false);
> if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
Looking at attr_to_dynamic_prop we handle block, ref, and constants,
otherwise we give complain about an unexpected attribute type.
I think then that there's no need to check the form of the attribute
here at all, you could just perform a NULL check and proceed to handle
the attribute. The error in the else block (about incorrect attribute
form) can be deleted.
This applies to both the changes in this patch.
Thanks,
Andrew
> @@ -23874,7 +23874,7 @@ set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
>
> /* Read DW_AT_associated and set in type. */
> attr = dwarf2_attr (die, DW_AT_associated, cu);
> - if (attr != NULL && attr->form_is_block ())
> + if (attr != NULL && (attr->form_is_block () || attr->form_is_ref ()))
> {
> struct type *prop_type = cu->addr_sized_int_type (false);
> if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
> --
> 2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes
2020-07-01 8:20 ` Andrew Burgess
@ 2020-07-01 9:37 ` Sharma, Alok Kumar
2020-07-01 11:15 ` Andrew Burgess
0 siblings, 1 reply; 4+ messages in thread
From: Sharma, Alok Kumar @ 2020-07-01 9:37 UTC (permalink / raw)
To: Andrew Burgess; +Cc: gdb-patches, George, Jini Susan, Achra, Nitika
[-- Attachment #1: Type: text/plain, Size: 4542 bytes --]
Thanks for your comment/suggestion. Please find updated patch as an attachment.
gdb/ChangeLog
* dwarf2/read.c (set_die_type): Removed conditions to restrict
forms for DW_AT_associated and DW_AT_allocated attributes,
which is already checked in function attr_to_dynamic_prop.
Regards,
Alok
-----Original Message-----
From: Andrew Burgess <andrew.burgess@embecosm.com>
Sent: Wednesday, July 1, 2020 1:50 PM
To: Sharma, Alok Kumar <AlokKumar.Sharma@amd.com>
Cc: gdb-patches@sourceware.org; George, Jini Susan <JiniSusan.George@amd.com>; Achra, Nitika <Nitika.Achra@amd.com>
Subject: Re: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes
[CAUTION: External Email]
* Sharma, Alok Kumar <AlokKumar.Sharma@amd.com> [2020-07-01 07:01:53 +0000]:
> Hi All,
>
> I request you all to please review this patch. Below are the details.
>
> Problem Description:
> Currently, GDB rejects the (die) reference form while it accepts exprloc
> form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
> in DWARF5 standard. Flang compiler assigns (die) reference to
> DW_AT_associated and DW_AT_allocated for some cases.
> Resolution:
> Now ' set_die_type' Is modified to accept reference form as well.
> This change will not impact testsuite for gfortran, and will fix
> failures for Flang compiler with existing testsuite.
>
> gdb/ChangeLog
>
> * dwarf2/read.c (set_die_type): Allow reference form for
> DW_AT_associated and DW_AT_allocated attributes.
>
> Please let me know your valuable comments.
>
> Regards,
> Alok
>
> From 9a37e9973e513738234b4fed4b66d0ffc1438398 Mon Sep 17 00:00:00 2001
> From: alosharm <AlokKumar.Sharma@amd.com>
> Date: Wed, 1 Jul 2020 11:53:09 +0530
> Subject: [PATCH] Allow reference form for DW_AT_associated and
> DW_AT_allocated attributes
>
> Currently, GDB rejects the (die) reference form while it accepts
> exprloc form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
> in DWARF5 standard. Flang compiler assigns (die) reference to
> DW_AT_associated and DW_AT_allocated for some cases.
>
> gdb/ChangeLog
>
> * dwarf2/read.c (set_die_type): Allow reference form for
> DW_AT_associated and DW_AT_allocated attributes.
> ---
> gdb/ChangeLog | 5 +++++
> gdb/dwarf2/read.c | 4 ++--
> 2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/gdb/ChangeLog b/gdb/ChangeLog index
> d64f572e07..75ea79471c 100644
> --- a/gdb/ChangeLog
> +++ b/gdb/ChangeLog
> @@ -1,3 +1,8 @@
> +2020-07-01 Alok Kumar Sharma <AlokKumar.Sharma@amd.com>
> +
> + * dwarf2/read.c (set_die_type): Allow reference form for
> + DW_AT_associated and DW_AT_allocated attributes.
> +
> 2020-06-30 Tom Tromey <tromey@adacore.com>
>
> * dwarf2/read.c (quirk_rust_enum): Correctly call diff --git
> a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index b097f624b6..0fba590184
> 100644
> --- a/gdb/dwarf2/read.c
> +++ b/gdb/dwarf2/read.c
> @@ -23859,7 +23859,7 @@ set_die_type (struct die_info *die, struct
> type *type, struct dwarf2_cu *cu)
>
> /* Read DW_AT_allocated and set in type. */
> attr = dwarf2_attr (die, DW_AT_allocated, cu);
> - if (attr != NULL && attr->form_is_block ())
> + if (attr != NULL && (attr->form_is_block () || attr->form_is_ref
> + ()))
> {
> struct type *prop_type = cu->addr_sized_int_type (false);
> if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
Looking at attr_to_dynamic_prop we handle block, ref, and constants, otherwise we give complain about an unexpected attribute type.
I think then that there's no need to check the form of the attribute here at all, you could just perform a NULL check and proceed to handle the attribute. The error in the else block (about incorrect attribute
form) can be deleted.
This applies to both the changes in this patch.
Thanks,
Andrew
> @@ -23874,7 +23874,7 @@ set_die_type (struct die_info *die, struct
> type *type, struct dwarf2_cu *cu)
>
> /* Read DW_AT_associated and set in type. */
> attr = dwarf2_attr (die, DW_AT_associated, cu);
> - if (attr != NULL && attr->form_is_block ())
> + if (attr != NULL && (attr->form_is_block () || attr->form_is_ref
> + ()))
> {
> struct type *prop_type = cu->addr_sized_int_type (false);
> if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
> --
> 2.17.1
[-- Attachment #2: 0001-Allow-reference-form-for-DW_AT_associated-and-DW_AT_.patch --]
[-- Type: application/octet-stream, Size: 2839 bytes --]
From ea3ca77d3e53a467b90f9b8ae97ac29968909719 Mon Sep 17 00:00:00 2001
From: alosharm <AlokKumar.Sharma@amd.com>
Date: Wed, 1 Jul 2020 11:53:09 +0530
Subject: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated
attributes
Currently, GDB rejects the (die) reference form while it accepts exprloc
form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
in DWARF5 standard. Flang compiler assigns (die) reference to
DW_AT_associated and DW_AT_allocated for some cases.
gdb/ChangeLog
* dwarf2/read.c (set_die_type): Removed conditions to restrict
forms for DW_AT_associated and DW_AT_allocated attributes,
which is already checked in function attr_to_dynamic_prop.
---
gdb/ChangeLog | 6 ++++++
gdb/dwarf2/read.c | 16 ++--------------
2 files changed, 8 insertions(+), 14 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d64f572e07..404ee40667 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-07-01 Alok Kumar Sharma <AlokKumar.Sharma@amd.com>
+
+ * dwarf2/read.c (set_die_type): Removed conditions to restrict
+ forms for DW_AT_associated and DW_AT_allocated attributes,
+ which is already checked in function attr_to_dynamic_prop.
+
2020-06-30 Tom Tromey <tromey@adacore.com>
* dwarf2/read.c (quirk_rust_enum): Correctly call
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index b097f624b6..4622d14a05 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -23859,33 +23859,21 @@ set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
/* Read DW_AT_allocated and set in type. */
attr = dwarf2_attr (die, DW_AT_allocated, cu);
- if (attr != NULL && attr->form_is_block ())
+ if (attr != NULL)
{
struct type *prop_type = cu->addr_sized_int_type (false);
if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
type->add_dyn_prop (DYN_PROP_ALLOCATED, prop);
}
- else if (attr != NULL)
- {
- complaint (_("DW_AT_allocated has the wrong form (%s) at DIE %s"),
- (attr != NULL ? dwarf_form_name (attr->form) : "n/a"),
- sect_offset_str (die->sect_off));
- }
/* Read DW_AT_associated and set in type. */
attr = dwarf2_attr (die, DW_AT_associated, cu);
- if (attr != NULL && attr->form_is_block ())
+ if (attr != NULL)
{
struct type *prop_type = cu->addr_sized_int_type (false);
if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
type->add_dyn_prop (DYN_PROP_ASSOCIATED, prop);
}
- else if (attr != NULL)
- {
- complaint (_("DW_AT_associated has the wrong form (%s) at DIE %s"),
- (attr != NULL ? dwarf_form_name (attr->form) : "n/a"),
- sect_offset_str (die->sect_off));
- }
/* Read DW_AT_data_location and set in type. */
attr = dwarf2_attr (die, DW_AT_data_location, cu);
--
2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes
2020-07-01 9:37 ` Sharma, Alok Kumar
@ 2020-07-01 11:15 ` Andrew Burgess
0 siblings, 0 replies; 4+ messages in thread
From: Andrew Burgess @ 2020-07-01 11:15 UTC (permalink / raw)
To: Sharma, Alok Kumar; +Cc: gdb-patches, George, Jini Susan, Achra, Nitika
* Sharma, Alok Kumar <AlokKumar.Sharma@amd.com> [2020-07-01 09:37:37 +0000]:
> Thanks for your comment/suggestion. Please find updated patch as an attachment.
>
> gdb/ChangeLog
>
> * dwarf2/read.c (set_die_type): Removed conditions to restrict
> forms for DW_AT_associated and DW_AT_allocated attributes,
> which is already checked in function attr_to_dynamic_prop.
>
> Regards,
> Alok
Looks good. Please go ahead and apply.
Thanks,
Andrew
>
> -----Original Message-----
> From: Andrew Burgess <andrew.burgess@embecosm.com>
> Sent: Wednesday, July 1, 2020 1:50 PM
> To: Sharma, Alok Kumar <AlokKumar.Sharma@amd.com>
> Cc: gdb-patches@sourceware.org; George, Jini Susan <JiniSusan.George@amd.com>; Achra, Nitika <Nitika.Achra@amd.com>
> Subject: Re: [PATCH] Allow reference form for DW_AT_associated and DW_AT_allocated attributes
>
> [CAUTION: External Email]
>
> * Sharma, Alok Kumar <AlokKumar.Sharma@amd.com> [2020-07-01 07:01:53 +0000]:
>
> > Hi All,
> >
> > I request you all to please review this patch. Below are the details.
> >
> > Problem Description:
> > Currently, GDB rejects the (die) reference form while it accepts exprloc
> > form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
> > in DWARF5 standard. Flang compiler assigns (die) reference to
> > DW_AT_associated and DW_AT_allocated for some cases.
> > Resolution:
> > Now ' set_die_type' Is modified to accept reference form as well.
> > This change will not impact testsuite for gfortran, and will fix
> > failures for Flang compiler with existing testsuite.
> >
> > gdb/ChangeLog
> >
> > * dwarf2/read.c (set_die_type): Allow reference form for
> > DW_AT_associated and DW_AT_allocated attributes.
> >
> > Please let me know your valuable comments.
> >
> > Regards,
> > Alok
> >
> > From 9a37e9973e513738234b4fed4b66d0ffc1438398 Mon Sep 17 00:00:00 2001
> > From: alosharm <AlokKumar.Sharma@amd.com>
> > Date: Wed, 1 Jul 2020 11:53:09 +0530
> > Subject: [PATCH] Allow reference form for DW_AT_associated and
> > DW_AT_allocated attributes
> >
> > Currently, GDB rejects the (die) reference form while it accepts
> > exprloc form. It is allowed in DWARF standard. "Table 7.5: Attribute encodings"
> > in DWARF5 standard. Flang compiler assigns (die) reference to
> > DW_AT_associated and DW_AT_allocated for some cases.
> >
> > gdb/ChangeLog
> >
> > * dwarf2/read.c (set_die_type): Allow reference form for
> > DW_AT_associated and DW_AT_allocated attributes.
> > ---
> > gdb/ChangeLog | 5 +++++
> > gdb/dwarf2/read.c | 4 ++--
> > 2 files changed, 7 insertions(+), 2 deletions(-)
> >
> > diff --git a/gdb/ChangeLog b/gdb/ChangeLog index
> > d64f572e07..75ea79471c 100644
> > --- a/gdb/ChangeLog
> > +++ b/gdb/ChangeLog
> > @@ -1,3 +1,8 @@
> > +2020-07-01 Alok Kumar Sharma <AlokKumar.Sharma@amd.com>
> > +
> > + * dwarf2/read.c (set_die_type): Allow reference form for
> > + DW_AT_associated and DW_AT_allocated attributes.
> > +
> > 2020-06-30 Tom Tromey <tromey@adacore.com>
> >
> > * dwarf2/read.c (quirk_rust_enum): Correctly call diff --git
> > a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c index b097f624b6..0fba590184
> > 100644
> > --- a/gdb/dwarf2/read.c
> > +++ b/gdb/dwarf2/read.c
> > @@ -23859,7 +23859,7 @@ set_die_type (struct die_info *die, struct
> > type *type, struct dwarf2_cu *cu)
> >
> > /* Read DW_AT_allocated and set in type. */
> > attr = dwarf2_attr (die, DW_AT_allocated, cu);
> > - if (attr != NULL && attr->form_is_block ())
> > + if (attr != NULL && (attr->form_is_block () || attr->form_is_ref
> > + ()))
> > {
> > struct type *prop_type = cu->addr_sized_int_type (false);
> > if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
>
> Looking at attr_to_dynamic_prop we handle block, ref, and constants, otherwise we give complain about an unexpected attribute type.
>
> I think then that there's no need to check the form of the attribute here at all, you could just perform a NULL check and proceed to handle the attribute. The error in the else block (about incorrect attribute
> form) can be deleted.
>
> This applies to both the changes in this patch.
>
> Thanks,
> Andrew
>
>
> > @@ -23874,7 +23874,7 @@ set_die_type (struct die_info *die, struct
> > type *type, struct dwarf2_cu *cu)
> >
> > /* Read DW_AT_associated and set in type. */
> > attr = dwarf2_attr (die, DW_AT_associated, cu);
> > - if (attr != NULL && attr->form_is_block ())
> > + if (attr != NULL && (attr->form_is_block () || attr->form_is_ref
> > + ()))
> > {
> > struct type *prop_type = cu->addr_sized_int_type (false);
> > if (attr_to_dynamic_prop (attr, die, cu, &prop, prop_type))
> > --
> > 2.17.1
>
^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-07-01 11:15 ` Andrew Burgess
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