| 2024-03-31 08:00:17 |
Zixing Liu |
bug |
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added bug |
| 2024-03-31 08:00:37 |
Zixing Liu |
bug watch added |
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https://sourceware.org/bugzilla/show_bug.cgi?id=31580 |
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| 2024-03-31 08:00:37 |
Zixing Liu |
bug task added |
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gdb |
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| 2024-03-31 08:01:01 |
Zixing Liu |
gdb (Ubuntu): milestone |
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jammy-updates |
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| 2024-03-31 08:01:48 |
Zixing Liu |
summary |
gdb 12.1 fails to examine any global variables in D programs |
gdb 10.0 fails to examine any global variables in D programs |
|
| 2024-03-31 08:08:17 |
Bug Watch Updater |
gdb: status |
Unknown |
Confirmed |
|
| 2024-03-31 08:08:17 |
Bug Watch Updater |
gdb: importance |
Unknown |
Medium |
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| 2024-04-03 00:46:23 |
Zixing Liu |
description |
Summary:
* GDB 10.0 introduced a regression where it cannot inspect any global variables in any D programs compiled by any D compiler.
* LDC2 and GDC upstream stated Focal does not have such a problem and stuck to this release for their test images.
Reproduce steps:
Considering the following D program:
```
module t;
class uv {
int i;
}
__gshared uv i;
int main() {
i = new uv();
return 0; // #break
}
```
If you build it using `gdc -g -O0 t.d -o t` or `ldc2 -o t.o t.d -g`, run the GDB using the following commands ...
```
b t.d:10
p t.i
```
... you will notice GDB will complain that "'t.i' has unknown type; cast it to its declared type." |
[ Impact ]
* GDB 10.0 introduced a regression where it cannot inspect any global variables in any D programs compiled by any D compiler.
* LDC2 and GDC upstream stated Focal does not have such a problem and stuck to this release for their test images.
[ Test Plan ]
Considering the following D program:
```
module t;
class uv {
int i;
}
__gshared uv i;
int main() {
i = new uv();
return 0; // #break
}
```
If you build it using `gdc -g -O0 t.d -o t` or `ldc2 -o t.o t.d -g`, run the GDB using the following commands ...
```
b t.d:10
p t.i
```
... you will notice GDB will complain that "'t.i' has unknown type; cast it to its declared type."
[ Where problems could occur ]
* The fix consists of a single line change to the demangler. The worst-case scenario would be breaking the demangling functionality of other programming languages. However, the newer D ABI uses a symbol mangling scheme that is very difficult to confuse with other programming languages.
* Incorrect symbol de-mangling may also cause user confusion. However, the patch fixed a fundamental usability issue. |
|
| 2024-04-03 00:54:35 |
Zixing Liu |
description |
[ Impact ]
* GDB 10.0 introduced a regression where it cannot inspect any global variables in any D programs compiled by any D compiler.
* LDC2 and GDC upstream stated Focal does not have such a problem and stuck to this release for their test images.
[ Test Plan ]
Considering the following D program:
```
module t;
class uv {
int i;
}
__gshared uv i;
int main() {
i = new uv();
return 0; // #break
}
```
If you build it using `gdc -g -O0 t.d -o t` or `ldc2 -o t.o t.d -g`, run the GDB using the following commands ...
```
b t.d:10
p t.i
```
... you will notice GDB will complain that "'t.i' has unknown type; cast it to its declared type."
[ Where problems could occur ]
* The fix consists of a single line change to the demangler. The worst-case scenario would be breaking the demangling functionality of other programming languages. However, the newer D ABI uses a symbol mangling scheme that is very difficult to confuse with other programming languages.
* Incorrect symbol de-mangling may also cause user confusion. However, the patch fixed a fundamental usability issue. |
[ Impact ]
* GDB 10.0 introduced a regression where it cannot inspect any global variables in any D programs compiled by any D compiler.
* LDC2 and GDC upstream stated Focal does not have such a problem and stuck to this release for their test images.
[ Test Plan ]
Considering the following D program:
```
module t;
class uv {
int i;
}
__gshared uv i;
int main() {
i = new uv();
return 0; // #break
}
```
If you build it using `gdc -g -O0 t.d -o t` or `ldc2 -o t.o t.d -g`, run the GDB using the following commands ...
```
b t.d:10
p t.i
```
... you will notice GDB will complain that "'t.i' has unknown type; cast it to its declared type."
[ Where problems could occur ]
* The fix consists of a single line change to the demangler. The worst-case scenario would be breaking the demangling functionality of other programming languages. However, the newer D ABI uses a symbol mangling scheme that is very difficult to confuse with other programming languages.
* Incorrect symbol de-mangling may also cause user confusion. However, the patch fixed a fundamental usability issue.
[ Other Info ]
* Initial discussion in the LDC2 bug tracker: https://github.com/ldc-developers/ldc/issues/4389 |
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| 2024-04-03 09:41:01 |
Bug Watch Updater |
gdb: status |
Confirmed |
Fix Released |
|
| 2024-04-03 09:41:05 |
Bug Watch Updater |
bug watch added |
|
https://sourceware.org/bugzilla/show_bug.cgi?id=30276 |
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| 2024-04-04 05:18:59 |
Zixing Liu |
merge proposal linked |
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https://code.launchpad.net/~liushuyu-011/ubuntu/+source/gdb/+git/gdb/+merge/463546 |
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