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Trace thread config + paranoid level + preload (#176)

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- OMNITRACE_TRACE_THREAD_BARRIERS config option
  - set to OFF to disable wrapping `pthread_barrier`
- OMNITRACE_TRACE_THREAD_JOIN config option
  - set to OFF to disable wrapping `pthread_join`
- allow PAPI with perf_event_paranoid at level 2
- default to no PAPI events
- setenv LD_PRELOAD to not include libomnitrace after preload
  - closes #175 
- bump version to 1.7.1

[ROCm/rocprofiler-systems commit: a3439d5bf2]
This commit is contained in:
Jonathan R. Madsen
2022-10-06 19:11:08 -05:00
committed by GitHub
parent 45e5450bf2
commit 0ec0d18ac8
7 changed files with 94 additions and 21 deletions
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projects/rocprofiler-systems/source/lib/omnitrace-dl/dl.cpp
+26 -2
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@@ -98,9 +98,32 @@ get_omnitrace_dl_env()
inline bool
get_omnitrace_preload()
{
auto&& _preload = get_env("OMNITRACE_PRELOAD", true);
static bool _v = []() {
auto&& _preload = get_env("OMNITRACE_PRELOAD", true);
auto&& _preload_libs = get_env("LD_PRELOAD", std::string{});
return (_preload &&
_preload_libs.find("libomnitrace-dl.so") != std::string::npos);
}();
return _v;
}
inline void
reset_omnitrace_preload()
{
auto&& _preload_libs = get_env("LD_PRELOAD", std::string{});
return (_preload && _preload_libs.find("libomnitrace-dl.so") != std::string::npos);
if(_preload_libs.find("libomnitrace-dl.so") != std::string::npos)
{
auto _modified_preload = std::string{};
for(const auto& itr : delimit(_preload_libs, ":"))
{
if(itr.find("libomnitrace") != std::string::npos) continue;
_modified_preload += common::join("", ":", itr);
}
if(!_modified_preload.empty() && _modified_preload.find(':') == 0)
_modified_preload = _modified_preload.substr(1);
setenv("LD_PRELOAD", _modified_preload.c_str(), 1);
}
}
// environment priority:
@@ -940,6 +963,7 @@ omnitrace_preload()
if(_preload)
{
reset_omnitrace_preload();
omnitrace_preinit_library();
OMNITRACE_DL_LOG(1, "[%s] invoking %s(%s)\n", __FUNCTION__, "omnitrace_init",
::omnitrace::join(::omnitrace::QuoteStrings{}, ", ", "sampling",