Hi,
I would suggest following patch, which removes the special communication between ld.so and gdb. While debugging a ld.so issue with gdb 8.0 on alpha, I recognized that the debugger stalled when trying to execute this code. It thought this code was added to help debugging ld.so, but it seems nowadays it prevents to do so. May be bitrotted?
Does anyone found it useful while debugging ld.so with gdb in the past?
best regards Waldemar
+CC Anton who maintains gdb for ARC
On 06/26/2017 09:36 PM, Waldemar Brodkorb wrote:
Hi,
I would suggest following patch, which removes the special communication between ld.so and gdb. While debugging a ld.so issue with gdb 8.0 on alpha, I recognized that the debugger stalled when trying to execute this code. It thought this code was added to help debugging ld.so, but it seems nowadays it prevents to do so. May be bitrotted?
Does anyone found it useful while debugging ld.so with gdb in the past?
best regards Waldemar
Hi Waldemar,
On Mon, Jun 26, 2017 at 11:36 AM, Waldemar Brodkorb wbx@uclibc-ng.org wrote:
I would suggest following patch, which removes the special communication between ld.so and gdb. While debugging a ld.so issue with gdb 8.0 on alpha, I recognized that the debugger stalled when trying to execute this code. It thought this code was added to help debugging ld.so, but it seems nowadays it prevents to do so. May be bitrotted?
Does anyone found it useful while debugging ld.so with gdb in the past?
AFAIU this code is responsible for notifying gdb of loading/unloading shared objects, not just for ld.so debugging. It makes gdb commands like 'catch load' work, which I occasionally find useful.
Hi Max, Max Filippov wrote,
Hi Waldemar,
On Mon, Jun 26, 2017 at 11:36 AM, Waldemar Brodkorb wbx@uclibc-ng.org wrote:
I would suggest following patch, which removes the special communication between ld.so and gdb. While debugging a ld.so issue with gdb 8.0 on alpha, I recognized that the debugger stalled when trying to execute this code. It thought this code was added to help debugging ld.so, but it seems nowadays it prevents to do so. May be bitrotted?
Does anyone found it useful while debugging ld.so with gdb in the past?
AFAIU this code is responsible for notifying gdb of loading/unloading shared objects, not just for ld.so debugging. It makes gdb commands like 'catch load' work, which I occasionally find useful.
Okay, thanks for your feedback. I think I will just discard the patch and locally hack out the calls for now. Maybe when alpha ld.so is working and the failure still exist, I add another option to disable these calls via make menuconfig.
best regards Waldemar
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Max Filippov -
Vineet Gupta -
Waldemar Brodkorb