Compiler/C6000-CGT: support of __builtin_return_address()

Tobiasz Gajak

Part Number: C6000-CGT

Tool/software: TI C/C++ Compiler

Could you add to CGT real support of __builtin_return_address() compiler intrinsic ?

While I call it, it returns always zero. I am interested only in current function return address => __builtin_return_address(0);

over 5 years ago

0 George Mock over 5 years ago

TI__Guru**** 239845 points

To address your request, I filed the entry CODEGEN-6049 in the SDOWP system. You are welcome to follow it with the SDOWP link below in my signature. Note this entry does not report a bug, but requests a change in the compiler.

Such change requests are reviewed on a routine basis. Please give me more detail, as much as you can, on the problems you plan to solve with __builtin_return_address. That information will be helpful in the review.

Thanks and regards,

-George

0 Tobiasz Gajak over 5 years ago in reply to George Mock

Prodigy 90 points

Thank you George for your response.
I have two use cases for such feature:

1. printf-like logging function with offline formatting. We use currently macro that wraps PCE1 read and real logging function call in order to save address where log was taken. Having working __builtin_return_address(0) ,we don't have to read PCE1 every time and this reduces code size. Good example is this article : www.embeddedrelated.com/.../518.php

2. when implementing fatal error handling function it is convenient to save the fatal error caller address to "crash log"

0 George Mock over 5 years ago in reply to Tobiasz Gajak

TI__Guru**** 239845 points

Thank you! -George

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Compiler/C6000-CGT: support of __builtin_return_address()