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/common/invoke.hpp

@@ -29,6 +29,7 @@
 #include <cstring>
 #include <functional>
 #include <string>
+#include <unistd.h>
 
 #if !defined(OMNITRACE_COMMON_LIBRARY_NAME)
 #    define OMNITRACE_COMMON_LIBRARY_NAME "common"
@@ -77,9 +78,9 @@ ignore(const char* _name, int _verbose, int _value, const char* _reason, Args...
         fflush(stderr);
         fprintf(stderr,
                 "[omnitrace][" OMNITRACE_COMMON_LIBRARY_NAME
-                "][%li] %s(%s) was ignored :: %s\n",
-                get_thread_index(), _name, join(QuoteStrings{}, ", ", _args...).c_str(),
-                _reason);
+                "][%i][%li] %s(%s) was ignored :: %s\n",
+                getpid(), get_thread_index(), _name,
+                join(QuoteStrings{}, ", ", _args...).c_str(), _reason);
         fflush(stderr);
     }
 }
@@ -109,8 +110,8 @@ invoke(const char* _name, int _verbose, bool& _toggle, FuncT&& _func, Args... _a
                 OMNITRACE_COMMON_LIBRARY_LOG_START
                 fprintf(stderr,
                         "[omnitrace][" OMNITRACE_COMMON_LIBRARY_NAME
-                        "][%li][%i] %s(%s)\n",
-                        get_thread_index(), _lk, _name,
+                        "][%i][%li][%i] %s(%s)\n",
+                        getpid(), get_thread_index(), _lk, _name,
                         join(QuoteStrings{}, ", ", _args...).c_str());
                 OMNITRACE_COMMON_LIBRARY_LOG_END
                 fflush(stderr);
@@ -123,8 +124,8 @@ invoke(const char* _name, int _verbose, bool& _toggle, FuncT&& _func, Args... _a
             OMNITRACE_COMMON_LIBRARY_LOG_START
             fprintf(stderr,
                     "[omnitrace][" OMNITRACE_COMMON_LIBRARY_NAME
-                    "][%li] %s(%s) was guarded :: value = %i\n",
-                    get_thread_index(), _name,
+                    "][%i][%li] %s(%s) was guarded :: value = %i\n",
+                    getpid(), get_thread_index(), _name,
                     join(QuoteStrings{}, ", ", _args...).c_str(), _lk);
             OMNITRACE_COMMON_LIBRARY_LOG_END
             fflush(stderr);
@@ -135,8 +136,9 @@ invoke(const char* _name, int _verbose, bool& _toggle, FuncT&& _func, Args... _a
         OMNITRACE_COMMON_LIBRARY_LOG_START
         fprintf(stderr,
                 "[omnitrace][" OMNITRACE_COMMON_LIBRARY_NAME
-                "][%li] %s(%s) ignored :: null function pointer\n",
-                get_thread_index(), _name, join(QuoteStrings{}, ", ", _args...).c_str());
+                "][%i][%li] %s(%s) ignored :: null function pointer\n",
+                getpid(), get_thread_index(), _name,
+                join(QuoteStrings{}, ", ", _args...).c_str());
         OMNITRACE_COMMON_LIBRARY_LOG_END
     }