Hang occurred during reading SPEF in a generate_abstract stage #8109
Description
Describe the bug
In a hierarchical flow, hang occurred during reading SPEF in a generate_abstract stage after successfully generating GDS.
DESIGN: ihp-sg13g2/i2c-gpio-expander
Expected Behavior
No hang.
Environment
-- OpenROAD version: v2.0-23726-g68827da706
-- System name: Linux
-- Compiler: GNU 13.3.0
-- Build type: RELEASE
-- Install prefix: /usr/local
-- C++ Standard: 17
-- C++ Standard Required: ON
-- C++ Extensions: OFF
-- Performing Test C_COMPILER_SUPPORTS__-std=c++17
-- Performing Test C_COMPILER_SUPPORTS__-std=c++17 - Failed
-- Performing Test CXX_COMPILER_SUPPORTS__-std=c++17
-- Performing Test CXX_COMPILER_SUPPORTS__-std=c++17 - Success
-- Found Python3: /usr/bin/python3.12 (found version "3.12.3") found components: Interpreter
-- TCL library: /usr/lib/x86_64-linux-gnu/libtcl.so
-- TCL header: /usr/include/tcl/tcl.h
-- TCL readline library: /usr/lib/x86_64-linux-gnu/libtclreadline.so
-- TCL readline header: /usr/include/x86_64-linux-gnu
-- Found SWIG: /usr/local/bin/swig (found suitable version "4.3.0", minimum required is "4.0")
-- Using SWIG >= 4.3.0 -flatstaticmethod flag for python
-- boost: 1.86.0
-- GTest: 1.13.0
-- Found Python3: /usr/include/python3.12 (found version "3.12.3") found components: Development Development.Module Development.Embed
-- spdlog: 1.15.0
-- STA version: 2.7.0
-- STA git sha: d5761004cd2cd2bcfa85d73327867966c279c83d
-- System name: Linux
-- Compiler: GNU 13.3.0
-- Build type: RELEASE
-- Build CXX_FLAGS: -O3 -DNDEBUG
-- Install prefix: /usr/local
-- TCL library: /usr/lib/x86_64-linux-gnu/libtcl.so
-- TCL header: /usr/include/tcl/tcl.h
-- TCL readline library: /usr/lib/x86_64-linux-gnu/libtclreadline.so
-- TCL readline header: /usr/include/x86_64-linux-gnu/tclreadline.h
-- CUDD library: /usr/local/lib/libcudd.a
-- CUDD header: /usr/local/include/cudd.h
-- SSTA: 0
-- Found SWIG: /usr/local/bin/swig (found suitable version "4.3.0", minimum required is "3.0")
-- STA library: /workspace/ws1_test/OpenROAD-flow-scripts/tools/OpenROAD/build/libOpenSTA.a
-- STA executable: /workspace/ws1_test/OpenROAD-flow-scripts/tools/OpenROAD/build/sta
-- Found OR-Tools: /opt/or-tools/lib/cmake/ortools (version: 9.11.4210)
-- TCL library: /usr/lib/x86_64-linux-gnu/libtcl.so
-- TCL header: /usr/include/tcl/tcl.h
-- Found OpenMP: TRUE (found version "4.5")
-- Found OpenMP: TRUE (found version "4.5")
-- GUI is enabled
-- Could NOT find VTune (missing: VTune_LIBRARIES VTune_INCLUDE_DIRS)
-- TCL library: /usr/lib/x86_64-linux-gnu/libtcl.so
-- TCL header: /usr/include/tcl/tcl.h
-- TCL readline enabled
-- Tcl Extended disabled
-- Python3 enabled
-- Configuring done (1.7s)
-- Generating done (0.6s)To Reproduce
OpenROAD-flow-scripts/flow$ make SYNTH_WRAPPED_OPERATORS=1 DESIGN_CONFIG=./design/ihp-sg13g2/i2c-gpio-expander/config.mk
Relevant log output
[2025-08-25T05:06:06.237Z] Report metrics stage 6, finish...
[2025-08-25T05:06:07.174Z]
[2025-08-25T05:06:07.174Z] ==========================================================================
[2025-08-25T05:06:07.174Z] finish report_design_area
[2025-08-25T05:06:07.174Z] --------------------------------------------------------------------------
[2025-08-25T05:06:07.174Z] Design area 11353 u^2 94% utilization.
[2025-08-25T05:06:07.432Z] [WARNING GUI-0076] QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-root'
[2025-08-25T05:06:08.840Z] [WARNING GUI-0066] Heat map "Routing Congestion" has not been populated with data.
[2025-08-25T05:06:08.840Z] Elapsed time: 0:03.99[h:]min:sec. CPU time: user 4.62 sys 1.91 (163%). Peak memory: 163496KB.
[2025-08-25T05:06:09.099Z] Log Elapsed/s Peak Memory/MB sha1sum .odb [0:20)
[2025-08-25T05:06:09.099Z] 6_report 3 159 N/A
[2025-08-25T05:06:09.357Z] cp /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/lef/sg13g2_tech.lef ./objects/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/klayout_tech.lef
[2025-08-25T05:06:09.923Z] SC_LEF_RELATIVE_PATH="../../../../platforms/ihp-sg13g2/lef/sg13g2_stdcell.lef"; \
[2025-08-25T05:06:09.923Z] OTHER_LEFS_RELATIVE_PATHS=$(echo "<lef-files>$(realpath --relative-to=./results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base ./objects/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/klayout_tech.lef)</lef-files>"); \
[2025-08-25T05:06:09.923Z] sed 's,<lef-files>.*</lef-files>,<lef-files>'"$SC_LEF_RELATIVE_PATH"'</lef-files>'"$OTHER_LEFS_RELATIVE_PATHS"',g' /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/sg13g2.lyt > ./objects/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/klayout.lyt
[2025-08-25T05:06:09.923Z] sed -i 's,<map-file>.*</map-file>,<map-file>/tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/sg13g2.map</map-file>,g' ./objects/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/klayout.lyt
[2025-08-25T05:06:10.488Z] (env time -f 'Elapsed time: %E[h:]min:sec. CPU time: user %U sys %S (%P). Peak memory: %MKB.' stdbuf -o L /usr/bin/klayout -zz -rd design_name=I2cDeviceCtrl \
[2025-08-25T05:06:10.488Z] -rd in_def=./results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_final.def \
[2025-08-25T05:06:10.488Z] -rd in_files="/tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/gds/sg13g2_stdcell.gds " \
[2025-08-25T05:06:10.488Z] -rd seal_file="" \
[2025-08-25T05:06:10.488Z] -rd out_file=./results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_1_merged.gds \
[2025-08-25T05:06:10.488Z] -rd tech_file=./objects/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/klayout.lyt \
[2025-08-25T05:06:10.488Z] -rd layer_map= \
[2025-08-25T05:06:10.488Z] -r /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/util/def2stream.py) 2>&1 | tee /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/logs/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_1_merge.log
[2025-08-25T05:06:13.019Z] [INFO] Reporting cells prior to loading DEF ...
[2025-08-25T05:06:13.019Z] /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/gds/sg13g2_stdcell.gds
[2025-08-25T05:06:13.019Z] [INFO] GDS_ALLOW_EMPTY=RM_IHPSG13_1P_BITKIT_16x2_(CORNER|EDGE_TB|LE_con_corner|LE_con_edge_lr|LE_con_tap_lr|POWER_ramtap|TAP|TAP_LR)
[2025-08-25T05:06:13.019Z] [INFO] All LEF cells have matching GDS/OAS cells
[2025-08-25T05:06:13.019Z] [INFO] No orphan cells in the final layout
[2025-08-25T05:06:13.019Z] Elapsed time: 0:02.44[h:]min:sec. CPU time: user 2.20 sys 0.22 (99%). Peak memory: 433996KB.
[2025-08-25T05:06:13.019Z] cp results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_1_merged.gds results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_final.gds
[2025-08-25T05:06:13.277Z] cp ./results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/5_route.sdc ./results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_final.sdc
[2025-08-25T05:06:13.843Z] mkdir -p ./logs/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base ./reports/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base
[2025-08-25T05:06:13.843Z] (env time -f 'Elapsed time: %E[h:]min:sec. CPU time: user %U sys %S (%P). Peak memory: %MKB.' /tmp/workspace/ripts-Private_secure-jhkim-orfs2/tools/install/OpenROAD/bin/openroad -exit -no_init -threads 32 /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/scripts/generate_abstract.tcl -metrics ./logs/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/generate_abstract.json) 2>&1 | tee /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/logs/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/generate_abstract.log
[2025-08-25T05:06:13.843Z] OpenROAD v2.0-23726-g47057b73fe
[2025-08-25T05:06:13.843Z] Features included (+) or not (-): +GPU +GUI +Python
[2025-08-25T05:06:13.843Z] This program is licensed under the BSD-3 license. See the LICENSE file for details.
[2025-08-25T05:06:13.843Z] Components of this program may be licensed under more restrictive licenses which must be honored.
[2025-08-25T05:06:13.843Z] [INFO ORD-0030] Using 32 thread(s).
[2025-08-25T05:06:14.102Z] load_design 6_final.odb 6_final.sdc
[2025-08-25T05:06:14.102Z] read_liberty -corner slow /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/lib/sg13g2_stdcell_slow_1p08V_125C.lib
[2025-08-25T05:06:14.102Z] read_liberty -corner typ /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/lib/sg13g2_stdcell_typ_1p20V_25C.lib
[2025-08-25T05:06:14.102Z] read_liberty -corner fast /tmp/workspace/ripts-Private_secure-jhkim-orfs2/flow/platforms/ihp-sg13g2/lib/sg13g2_stdcell_fast_1p32V_m40C.lib
[2025-08-25T05:06:14.102Z] read_spef ./results/ihp-sg13g2/i2c-gpio-expander_I2cDeviceCtrl/base/6_final.spef
(Hang....)Screenshots
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Additional Context
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