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If you try to use the overloaded subscript operator of a class
in python, it fails like this:
(gdb) py print(gdb.parse_and_eval('b')[5])
Traceback (most recent call last):
File "<string>", line 1, in <module>
gdb.error: Cannot subscript requested type.
Error while executing Python code.
This simply checks if such an operator exists, and calls it
instead, making this possible:
(gdb) py print(gdb.parse_and_eval('b')[5])
102 'f'
Approved-By: Tom Tromey <tom@tromey.com>
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Currently it's not possible to call C++ methods from python.
Using this example:
```
class B
{
static int static_func ();
int arg0_func ();
int arg1_func (int arg1);
int arg2_func (int arg1, int arg2);
};
B *b_obj = new B;
```
Trying to call B::static_func gives this error:
```
(gdb) py b_obj = gdb.parse_and_eval('b_obj')
(gdb) py print(b_obj['static_func']())
Traceback (most recent call last):
File "<string>", line 1, in <module>
RuntimeError: Value is not callable (not TYPE_CODE_FUNC).
Error while executing Python code.
```
TYPE_CODE_METHOD was simply missing as a possible type in
valpy_call, now the same is possible:
```
(gdb) py b_obj = gdb.parse_and_eval('b_obj')
(gdb) py print(b_obj['static_func']())
1111
```
Note that it's necessary to explicitely add the this pointer
as the first argument in a call of non-static methods:
```
(gdb) py print(b_obj['arg0_func']())
Traceback (most recent call last):
File "<string>", line 1, in <module>
gdb.error: Too few arguments in function call.
Error while executing Python code.
(gdb) py print(b_obj['arg0_func'](b_obj))
198
```
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=13326
Approved-By: Tom Tromey <tom@tromey.com>
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This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
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On s390x-linux, I run into:
...
(gdb) python print(u[u_fields[0]])^M
99^M
(gdb) PASS: gdb.python/py-value-cc.exp: u's first field via field
python print(u[u_fields[1]])^M
0 '\000'^M
(gdb) FAIL: gdb.python/py-value-cc.exp: u's second field via field
...
There's a var u of this type:
...
union U {
int a;
char c;
};
...
and after assigning 99 to u.a, the test-case expects u.c to contain 99 (which
it does on x86_64), but instead it contains 0.
Fix this by instead assigning 0x63636363, to ensure that u.c == 99 for both
little and big endian.
Tested on x86_64-linux and s390x-linux.
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This commit is the result of running the gdb/copyright.py script,
which automated the update of the copyright year range for all
source files managed by the GDB project to be updated to include
year 2023.
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This commit brings all the changes made by running gdb/copyright.py
as per GDB's Start of New Year Procedure.
For the avoidance of doubt, all changes in this commits were
performed by the script.
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This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
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gdb/ChangeLog:
Update copyright year range in all GDB files.
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This commit applies all changes made after running the gdb/copyright.py
script.
Note that one file was flagged by the script, due to an invalid
copyright header
(gdb/unittests/basic_string_view/element_access/char/empty.cc).
As the file was copied from GCC's libstdc++-v3 testsuite, this commit
leaves this file untouched for the time being; a patch to fix the header
was sent to gcc-patches first.
gdb/ChangeLog:
Update copyright year range in all GDB files.
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gdb/ChangeLog:
Update copyright year range in all GDB files
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This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.
gdb/ChangeLog:
Update copyright year range in all GDB files.
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gdb/ChangeLog:
Update year range in copyright notice of all files.
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gdb/ChangeLog:
Update year range in copyright notice of all files.
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* NEWS: Add entry for the new feature
* python/py-value.c (valpy_binop): Call value_x_binop for struct
and class values.
testsuite/
* gdb.python/py-value-cc.cc: Improve test case to enable testing
operations on gdb.Value objects.
* gdb.python/py-value-cc.exp: Add new test to test operations on
gdb.Value objects.
doc/
* python.texi (Values From Inferior): Add description about the
new feature.
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PR python/15464
PR python/16113
* valops.c (value_struct_elt_bitpos): New function
* py-type.c (convert_field): Set 'name' attribute of a gdb.Field
object to 'None' if the field name is an empty string ("").
* python/py-value.c (valpy_getitem): Use 'bitpos' and 'type'
attribute to look for a field when 'name' is 'None'.
(get_field_type): New function
testsuite/
* gdb.python/py-type.c: Enhance test case.
* gdb.python/py-value-cc.cc: Likewise
* gdb.python/py-type.exp: Add new tests.
* gdb.python/py-value-cc.exp: Likewise
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PR python/16113
* NEWS (Python Scripting): Add entry for the new feature and the
new attribute of gdb.Field objects.
* python/py-type.c (gdbpy_is_field): New function
(convert_field): Add 'parent_type' attribute to gdb.Field
objects.
* python/py-value.c (valpy_getitem): Allow subscript value to be
a gdb.Field object.
(value_has_field): New function
(get_field_flag): New function
* python/python-internal.h (gdbpy_is_field): Add declaration.
testsuite/
* gdb.python/py-value-cc.cc: Improve test case.
* gdb.python/py-value-cc.exp: Add new tests to test usage of
gdb.Field objects as subscripts on gdb.Value objects.
doc/
* gdb.texinfo (Values From Inferior): Add a note about using
gdb.Field objects as subscripts on gdb.Value objects.
(Types In Python): Add description about the new attribute
"parent_type" of gdb.Field objects.
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* gdb.python/py-value-cc.exp: Update.
* gdb.python/py-value.exp: Use different names for .o files for
C and C++. Only perform C++ tests if !skip_cplus_tests.
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