Handle fork in target application (#191)

* Always print PID in log messages

* omnitrace-dl updates

- omnitrace_preload does not call omnitrace_init or omnitrace_init_tooling
- omnitrace_preload will call omnitrace_set_mpi if OMNITRACE_USE_MPI
  or OMNITRACE_USE_MPIP in the env is true but not call it otherwise
  because doing so either overrides OMNITRACE_USE_PID (when true) or
  disable mpip from initialization (when false) and the MPI
  init can be caught later and override OMNITRACE_USE_PID

* config updates

- set_setting_value sets user update type
- remove volatile from get_settings_configured
- don't override settings::default_process_suffix
- don't kill process in omnitrace_exit_action
- set_state ignores updating state if >= State::Finalized

* Handle state > State::Finalized

* fork gotcha updates

- unsets LD_PRELOAD
- sets OMNITRACE_ROOT_PROCESS
- sets OMNITRACE_CHILD_PROCESS

* libomnitrace library.cpp updates

- basic_bundle for fini metrics
- handle finalization from child process

* sampling updates

- sampling::shutdown handles when child process

* Add example and test using fork

* Update run-ci script to support not submitting

* Tweak test envs

* Update build flags when codecov enabled

* remove unnecessary includes of sampling header

* Replace mpi copy/fini static lambda with free-funcs

* Update codecov job

* Fix OMPT segfaults after finalization

* Miscellaneous updates after rebase

* fixes for causal profiling

* revert some run-ci.sh changes

* Disable storing env in sampling::shutdown

* formatting fix

* Update timemory submodule

- fixed occasional synchronization issues with allocator offloading
- exclude protozero:: from internal samples

* improve root/child process detection

- avoid omnitrace_finalize in MPI when child process
- revert some testing tweaks

source/lib/core/debug.hpp

@@ -86,6 +86,12 @@ set_source_location(source_location&&);
 FILE*
 get_file();
 //
+void
+close_file();
+//
+int64_t
+get_tid();
+//
 inline void
 flush()
 {
@@ -168,7 +174,7 @@ as_hex<void*>(void*, size_t);
 #endif
 
 #if !defined(OMNITRACE_DEBUG_THREAD_IDENTIFIER)
-#    define OMNITRACE_DEBUG_THREAD_IDENTIFIER ::tim::threading::get_id()
+#    define OMNITRACE_DEBUG_THREAD_IDENTIFIER ::omnitrace::debug::get_tid()
 #endif
 
 #if !defined(OMNITRACE_SOURCE_LOCATION)
@@ -394,7 +400,6 @@ as_hex<void*>(void*, size_t);
         fprintf(::omnitrace::debug::get_file(), __VA_ARGS__);                            \
         ::omnitrace::debug::flush();                                                     \
         ::omnitrace::set_state(::omnitrace::State::Finalized);                           \
-        ::tim::signals::disable_signal_detection();                                      \
         timemory_print_demangled_backtrace<64>();                                        \
         METHOD;                                                                          \
     }
@@ -410,7 +415,6 @@ as_hex<void*>(void*, size_t);
         fprintf(::omnitrace::debug::get_file(), __VA_ARGS__);                            \
         ::omnitrace::debug::flush();                                                     \
         ::omnitrace::set_state(::omnitrace::State::Finalized);                           \
-        ::tim::signals::disable_signal_detection();                                      \
         timemory_print_demangled_backtrace<64>();                                        \
         METHOD;                                                                          \
     }
@@ -427,7 +431,6 @@ as_hex<void*>(void*, size_t);
         fprintf(::omnitrace::debug::get_file(), __VA_ARGS__);                            \
         ::omnitrace::debug::flush();                                                     \
         ::omnitrace::set_state(::omnitrace::State::Finalized);                           \
-        ::tim::signals::disable_signal_detection();                                      \
         timemory_print_demangled_backtrace<64>();                                        \
         METHOD;                                                                          \
     }
@@ -443,7 +446,6 @@ as_hex<void*>(void*, size_t);
         fprintf(::omnitrace::debug::get_file(), __VA_ARGS__);                            \
         ::omnitrace::debug::flush();                                                     \
         ::omnitrace::set_state(::omnitrace::State::Finalized);                           \
-        ::tim::signals::disable_signal_detection();                                      \
         timemory_print_demangled_backtrace<64>();                                        \
         METHOD;                                                                          \
     }