Enable --trace-compile during SIGUSR1/SIGINFO1 profiling

[IanButterworth]

Highlights compilation that's happening during the profiling period, which is otherwise just indicated by non-specific profile hits.

i.e. hitting ctrl-T on macOS just after starting Pkg.update()

load: 4.66  cmd: julia 29738 running 14.25u 0.90s

======================================================================================
Information request received. A stacktrace will print followed by a 1.0 second profile.
--trace-compile is enabled during profile collection.
======================================================================================

signal (29): Information request: 29
__psynch_cvwait at /usr/lib/system/libsystem_kernel.dylib (unknown line)
unknown function (ip: 0x0) at (unknown file)
_ZNK4llvm17RegisterClassInfo16computePSetLimitEj at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm17ScheduleDAGMILive15initRegPressureEv at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm17ScheduleDAGMILive8scheduleEv at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN12_GLOBAL__N_120MachineSchedulerBase15scheduleRegionsERN4llvm17ScheduleDAGInstrsEb at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN12_GLOBAL__N_116MachineScheduler20runOnMachineFunctionERN4llvm15MachineFunctionE at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm19MachineFunctionPass13runOnFunctionERNS_8FunctionE at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm13FPPassManager13runOnFunctionERNS_8FunctionE at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm13FPPassManager11runOnModuleERNS_6ModuleE at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm6legacy15PassManagerImpl3runERNS_6ModuleE at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
_ZN4llvm3orc14SimpleCompilerclERNS_6ModuleE at /Users/ian/Documents/GitHub/julia/usr/lib/libLLVM.dylib (unknown line)
#=  225.2 ms =# precompile(Tuple{typeof(Core.kwcall), NamedTuple{(:io,), Tuple{Base.IOContext{IO}}}, typeof(Pkg.Registry.update)})
operator() at /Users/ian/Documents/GitHub/julia/src/jitlayers.cpp:1612
addModule at /Users/ian/Documents/GitHub/julia/src/jitlayers.cpp:2093
jl_compile_codeinst_now at /Users/ian/Documents/GitHub/julia/src/jitlayers.cpp:682
jl_compile_codeinst_impl at /Users/ian/Documents/GitHub/julia/src/jitlayers.cpp:873
jl_compile_method_internal at /Users/ian/Documents/GitHub/julia/src/gf.c:3535
_jl_invoke at /Users/ian/Documents/GitHub/julia/src/gf.c:3993 [inlined]
ijl_apply_generic at /Users/ian/Documents/GitHub/julia/src/gf.c:4198
#update_registries#162 at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/Operations.jl:1713
update_registries at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/Operations.jl:1710 [inlined]
#up#165 at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/API.jl:421
up at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/API.jl:406
unknown function (ip: 0x125c440ef) at (unknown file)
#up#48 at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/API.jl:168
unknown function (ip: 0x125c0c4b7) at (unknown file)
up at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/API.jl:157
jfptr_up_44121 at /Users/ian/Documents/GitHub/julia/usr/share/julia/compiled/v1.13/Pkg/tUTdb_L0OKt.dylib (unknown line)
do_cmd at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/REPLMode/REPLMode.jl:422
do_cmds at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/src/REPLMode/REPLMode.jl:406
jfptr_do_cmds_44950 at /Users/ian/Documents/GitHub/julia/usr/share/julia/compiled/v1.13/Pkg/tUTdb_L0OKt.dylib (unknown line)
do_cmds at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/ext/REPLExt/REPLExt.jl:118
on_done at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/ext/REPLExt/REPLExt.jl:132
jfptr_on_done_2682 at /Users/ian/Documents/GitHub/julia/usr/share/julia/compiled/v1.13/REPLExt/c9i2p_L0OKt.dylib (unknown line)
jl_apply at /Users/ian/Documents/GitHub/julia/src/julia.h:2382 [inlined]
jl_f_invoke_in_world at /Users/ian/Documents/GitHub/julia/src/builtins.c:902
#invokelatest_gr#233 at ./reflection.jl:1333 [inlined]
invokelatest_gr at ./reflection.jl:1327 [inlined]
#create_mode##0 at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Pkg/ext/REPLExt/REPLExt.jl:156
unknown function (ip: 0x125bfc163) at (unknown file)
jl_apply at /Users/ian/Documents/GitHub/julia/src/julia.h:2382 [inlined]
jl_f_invokelatest at /Users/ian/Documents/GitHub/julia/src/builtins.c:883
run_interface at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/REPL/src/LineEdit.jl:2854
run_frontend at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:1697
#61 at /Users/ian/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/REPL/src/REPL.jl:678
jfptr_YY.61_17068 at /Users/ian/Documents/GitHub/julia/usr/share/julia/compiled/v1.13/REPL/u0gqU_L0OKt.dylib (unknown line)
jl_apply at /Users/ian/Documents/GitHub/julia/src/julia.h:2382 [inlined]
start_task at /Users/ian/Documents/GitHub/julia/src/task.c:1253
unknown function (ip: 0x0) at (unknown file)

#=   34.0 ms =# precompile(Tuple{Base.Experimental.var"#sync_end##0#sync_end##1"{Base.Channel{Any}, Task}})
#=   27.7 ms =# precompile(Tuple{Downloads.Curl.var"#socket_callback##6#socket_callback##7"{Int32, FileWatching.FDWatcher, Downloads.Curl.Multi}})
#=    4.8 ms =# precompile(Tuple{Base.var"#702#703"{Base.Process}})
#=    4.8 ms =# precompile(Tuple{typeof(Base.lock), Base.TTY})
    Updating registry at `~/.julia/registries/HolyLabRegistry`
#=    6.1 ms =# precompile(Tuple{typeof(Base.unlock), Base.TTY})
    Updating git-repo `git@github.com:HolyLab/HolyLabRegistry`
#=    3.7 ms =# precompile(Tuple{typeof(Base.merge), NamedTuple{(:payload,), Tuple{Base.Dict{Symbol, Any}}}, NamedTuple{(:transfer_progress, :credentials), Tuple{Ptr{Nothing}, Ptr{Nothing}}}})
#=    7.0 ms =# precompile(Tuple{typeof(Core.kwcall), NamedTuple{(:payload, :transfer_progress, :credentials), Tuple{Base.Dict{Symbol, Any}, Ptr{Nothing}, Ptr{Nothing}}}, Type{LibGit2.RemoteCallbacks}})

==============================================================
Profile collected. A report will print at the next yield point
Disabling --trace-compile
==============================================================

┌ Warning: There were no samples collected in one or more groups.
│ This may be due to idle threads, or you may need to run your
│ program longer (perhaps by running it multiple times),
│ or adjust the delay between samples with `Profile.init()`.
└ @ Profile ~/Documents/GitHub/julia/usr/share/julia/stdlib/v1.13/Profile/src/Profile.jl:1362
Overhead ╎ [+additional indent] Count File:Line  Function
=========================================================
Thread 1 (interactive)
 Task 0x000000010f3f92d0 Total snapshots: 364. Utilization: 100%
   ╎204 @REPL/src/REPL.jl:678  (::REPL.var"#61#62"{REPL.LineEditREPL, REPL.REPLBackendRef})()
   ╎ 204 @REPL/src/REPL.jl:1697  run_frontend(repl::REPL.LineEditREPL, backend::REPL.REPLBackendRef)
   ╎  204 @REPL/src/LineEdit.jl:2854  run_interface(terminal::REPL.Terminals.TextTerminal, m::REPL.LineEdit.ModalInterface, s::R…
   ╎   204 @Pkg/ext/REPLExt/REPLExt.jl:156  (::REPLExt.var"#create_mode##0#create_mode##1"{REPL.LineEditREPL})(s::REPL.LineEdit.…
   ╎    204 @Base/reflection.jl:1327  invokelatest_gr
   ╎     204 @Base/reflection.jl:1333  #invokelatest_gr#233
   ╎    ╎ 204 @Pkg/ext/REPLExt/REPLExt.jl:132  on_done(s::REPL.LineEdit.MIState, buf::IOBuffer, ok::Bool, repl::REPL.LineEditREP…
   ╎    ╎  204 @Pkg/ext/REPLExt/REPLExt.jl:118  do_cmds(repl::REPL.LineEditREPL, commands::String)
...