Latency Handover#11
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Static storage duration objects that has non-trivial destructor are bad. And a function-local static reference of the form static T& t = *new T; is allowed Reference for the style guide: https://google.github.io/styleguide/cppguide.html#Static_and_Global_Variables Background: There's a segmentation fault on the arm server if I run the gem5 simulation with --dry-run, do m5.instantiation() but no m5.simulation(). Stack trace: Thread 1 "gem5.opt" received signal SIGSEGV, Segmentation fault. __GI_strcmp () at ../sysdeps/aarch64/strcmp.S:136 warning: 136 ../sysdeps/aarch64/strcmp.S: No such file or directory (gdb) bt #0 __GI_strcmp () at ../sysdeps/aarch64/strcmp.S:136 #1 0x0000aaaab415f424 in sc_gem5::(anonymous namespace)::findEventIn (events=std::vector of length 2, capacity 2 = {...}, name="event_0") at /usr/include/c++/14/bits/basic_string.h:227 #2 sc_gem5::(anonymous namespace)::popEvent (events=0xaaaac00aed50 <sc_gem5::topLevelEvents()::topLevelEvents>, name="event_0") at src/systemc/core/event.cc:68 #3 sc_gem5::Event::~Event (this=0xaaaac1d8b000, __in_chrg=<optimized out>) at src/systemc/core/event.cc:150 #4 0x0000aaaab417e95c in sc_core::sc_event::~sc_event (this=<optimized out>, __in_chrg=<optimized out>) at src/systemc/core/sc_event.cc:321 #5 0x0000aaaabf7b39e0 in scx::async_request::~async_request() () #6 0x0000aaaabf7b12d4 in scx::scheduler_mapping::~scheduler_mapping() () #7 0x0000aaaabf7b1498 in scx::scheduler_mapping::~scheduler_mapping() () #8 0x0000aaaabf7adfb4 in scx::scx_simcontroller::~scx_simcontroller() () #9 0x0000ffffe7b5946c in __run_exit_handlers (status=0, listp=0xffffe7cd0660 <__exit_funcs>, run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at ./stdlib/exit.c:118 #10 0x0000ffffe7b59560 [PAC] in __GI_exit (status=<optimized out>) at ./stdlib/exit.c:148 #11 0x0000ffffe7b42220 [PAC] in __libc_start_call_main (main=main@entry=0xaaaab6af43a0 <main(int, char**)>, argc=argc@entry=15, argv=argv@entry=0xffffffffeee8) at ../sysdeps/nptl/libc_start_call_main.h:74 #12 0x0000ffffe7b422fc [PAC] in __libc_start_main_impl (main=0xaaaab6af43a0 <main(int, char**)>, argc=15, argv=0xffffffffeee8, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=<optimized out>) at ../csu/libc-start.c:360 gem5#13 0x0000aaaab4003b30 [PAC] in _start () The issue seems to be the destruction order. There's a static topLevelEvents() that will be used in Event() ctor with sc_event. The segmentation fault happens when topLevelEvents already be destruct before ~Event calling destructor that will use topLevelEvents.
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