[all-commits] [llvm/llvm-project] ca10de: [z/OS] Add backtrace support for z/OS. (#121826)

[Kai Nacke via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ca10deaa72c37fb5eee8bf1c95466b12a8773e95
      https://github.com/llvm/llvm-project/commit/ca10deaa72c37fb5eee8bf1c95466b12a8773e95
  Author: Kai Nacke <kai.peter.nacke at ibm.com>
  Date:   2025-01-09 (Thu, 09 Jan 2025)

  Changed paths:
    M llvm/lib/Support/Unix/Signals.inc

  Log Message:
  -----------
  [z/OS] Add backtrace support for z/OS. (#121826)

The system call `__CELQTBCK()` is used to build a backtrace like
on other systems. The collected information are the address of the PC,
the address of the entry point (EP), the difference between both
addresses (+EP), the dynamic storage area (DSA aka the stack
pointer), and the function name.
The system call is described here:

https://www.ibm.com/docs/en/zos/3.1.0?topic=cwicsa6a-celqtbck-also-known-as-celqtbck-64-bit-traceback-service



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