[ERROR STA-0026] unterminated string constant

[thesourcerer8]

Description

There is a buffer overflow in read_liberty -corner Typical /home/philipp/libresilicon/StdCellLib/Catalog/gf180_stdcelllib_1/dependencies/pdks/gf180mcuD/libs.ref/gf180mcu_fd_sc_mcu7t5v0/liberty/gf180mcu_fd_sc_mcu7t5v0__tt_025C_5v00.lib
when reading liberty files with a function definition that is 67797 characters long. The string is properly terminated, but most likely due to the too small buffer, it thinks that the string constant isn't terminated.

Expected Behavior

Well, 67790 characters is long, but it would be nice to have the scalability to even such very complex cells. I will also try to produce a more compact function description, but finding the right algorithms for that will take some time.

Environment report

open_pdks e0f692f46654d6c7c99fc70a0c94a080dab53571
Kernel: Linux v6.2.0-39-generic
Distribution: ubuntu 22.04
Python: v3.10.12 (OK)
Container Engine: docker v24.0.5 (OK)
OpenLane Git Version: 7ea7a2aeef4bea5445d133c26ca2b3e9f0d0c78f
pip: INSTALLED
python-venv: INSTALLED
---
PDK Version Verification Status: MISMATCH
The version of open_pdks used in building the PDK does not match the version OpenLane was tested on (installed: e0f692f46654d6c7c99fc70a0c94a080dab53571, tested: dd7771c384ed36b91a25e9f8b314355fc26561be)
This may introduce some issues. You may want to re-install the PDK by invoking `make pdk`.
---
Git Log (Last 3 Commits)

7ea7a2a 2023-10-15T17:01:59+03:00 Fix `FP_PIN_ORDER_CFG` being overriden (#2017) - Kareem Farid -  (grafted, HEAD, tag: 2023.10.16)
---
Git Remotes

origin	https://github.com/The-OpenROAD-Project/OpenLane (fetch)
origin	https://github.com/The-OpenROAD-Project/OpenLane (push)

Reproduction material

issue_reproducible.zip

Relevant log output

ERROR]: during executing openroad script /openlane/scripts/openroad/floorplan.tcl
[ERROR]: Log: ../home/philipp/libresilicon/StdCellLib/Catalog/gf180_stdcelllib_1/openlane/user_proj_example/runs/23_12_10_23_31/logs/floorplan/3-initial_fp.log
[ERROR]: Last 10 lines:
OpenROAD bdc8e944cd08ba8edebeca19fa531bd026690330 
This program is licensed under the BSD-3 license. See the LICENSE file for details.
Components of this program may be licensed under more restrictive licenses which must be honored.
define_corners Typical
read_liberty -corner Typical /home/philipp/libresilicon/StdCellLib/Catalog/gf180_stdcelllib_1/dependencies/pdks/gf180mcuD/libs.ref/gf180mcu_fd_sc_mcu7t5v0/liberty/gf180mcu_fd_sc_mcu7t5v0__tt_025C_5v00.lib
read_liberty -corner Typical /home/philipp/libresilicon/StdCellLib/Catalog/gf180_stdcelllib_1/cells/lib/libresilicon.lib
[ERROR STA-0026] /home/philipp/libresilicon/StdCellLib/Catalog/gf180_stdcelllib_1/cells/lib/libresilicon.lib line 331, unterminated string constant.
Error: floorplan.tcl, 15 STA-0026
child process exited abnormally

[ERROR]: Creating issue reproducible...

[maliberty]

What sort of cell has a "function definition that is 67797 characters long"?

[maliberty]

This looks to be a flex limit on a single token. However the expression is horrible unreduced and should be fixed.