void __stdcall jitStartup(ICorJitHost* jitHost)
{
g_jitHost = jitHost;
// `jitStartup` may be called multiple times
// when pre-jitting. We should not reinitialize
// config values each time.
if (!JitConfig.isInitialized())
{
JitConfig.initialize(jitHost);
}
#if defined(PLATFORM_UNIX)
jitstdout = procstdout();
#else
if (jitstdout == nullptr)
{
int jitstdoutFd = _dup(_fileno(procstdout()));
_setmode(jitstdoutFd, _O_TEXT);
jitstdout = _fdopen(jitstdoutFd, "w");
assert(jitstdout != nullptr);
}
#endif
#ifdef FEATURE_TRACELOGGING
JitTelemetry::NotifyDllProcessAttach();
#endif
Compiler::compStartup();
}
extern "C" void __stdcall jitStartup(ICorJitHost* jitHost)
{
if (g_jitInitialized)
{
return;
}
g_jitHost = jitHost;
assert(!JitConfig.isInitialized());
JitConfig.initialize(jitHost);
#if defined(PLATFORM_UNIX)
jitstdout = procstdout();
#else
if (jitstdout == nullptr)
{
int stdoutFd = _fileno(procstdout());
// Check fileno error output(s) -1 may overlap with errno result
// but is included for completness.
// We want to detect the case where the initial handle is null
// or bogus and avoid making further calls.
if ((stdoutFd != -1) && (stdoutFd != -2) && (errno != EINVAL))
{
int jitstdoutFd = _dup(_fileno(procstdout()));
// Check the error status returned by dup.
if (jitstdoutFd != -1)
{
_setmode(jitstdoutFd, _O_TEXT);
jitstdout = _fdopen(jitstdoutFd, "w");
assert(jitstdout != nullptr);
// Prevent the FILE* from buffering its output in order to avoid calls to
// `fflush()` throughout the code.
setvbuf(jitstdout, nullptr, _IONBF, 0);
}
}
}
// If jitstdout is still null, fallback to whatever procstdout() was
// initially set to.
if (jitstdout == nullptr)
{
jitstdout = procstdout();
}
#endif // PLATFORM_UNIX
#ifdef FEATURE_TRACELOGGING
JitTelemetry::NotifyDllProcessAttach();
#endif
Compiler::compStartup();
g_jitInitialized = true;
}
void jitShutdown(bool processIsTerminating)
{
if (!g_jitInitialized)
{
return;
}
Compiler::compShutdown();
if (jitstdout != procstdout())
{
// When the process is terminating, the fclose call is unnecessary and is also prone to
// crashing since the UCRT itself often frees the backing memory earlier on in the
// termination sequence.
if (!processIsTerminating)
{
fclose(jitstdout);
}
}
#ifdef FEATURE_TRACELOGGING
JitTelemetry::NotifyDllProcessDetach();
#endif
g_jitInitialized = false;
}
void jitShutdown()
{
Compiler::compShutdown();
if (jitstdout != procstdout())
{
fclose(jitstdout);
}
#ifdef FEATURE_TRACELOGGING
JitTelemetry::NotifyDllProcessDetach();
#endif
}
extern "C" DLLEXPORT void __stdcall jitStartup(ICorJitHost* jitHost)
{
if (g_jitInitialized)
{
if (jitHost != g_jitHost)
{
// We normally don't expect jitStartup() to be invoked more than once.
// (We check whether it has been called once due to an abundance of caution.)
// However, during SuperPMI playback of MCH file, we need to JIT many different methods.
// Each one carries its own environment configuration state.
// So, we need the JIT to reload the JitConfig state for each change in the environment state of the
// replayed compilations.
// We do this by calling jitStartup with a different ICorJitHost,
// and have the JIT re-initialize its JitConfig state when this happens.
JitConfig.destroy(g_jitHost);
JitConfig.initialize(jitHost);
g_jitHost = jitHost;
}
return;
}
g_jitHost = jitHost;
assert(!JitConfig.isInitialized());
JitConfig.initialize(jitHost);
#ifdef DEBUG
const wchar_t* jitStdOutFile = JitConfig.JitStdOutFile();
if (jitStdOutFile != nullptr)
{
jitstdout = _wfopen(jitStdOutFile, W("a"));
assert(jitstdout != nullptr);
}
#endif // DEBUG
#if !defined(_HOST_UNIX_)
if (jitstdout == nullptr)
{
int stdoutFd = _fileno(procstdout());
// Check fileno error output(s) -1 may overlap with errno result
// but is included for completness.
// We want to detect the case where the initial handle is null
// or bogus and avoid making further calls.
if ((stdoutFd != -1) && (stdoutFd != -2) && (errno != EINVAL))
{
int jitstdoutFd = _dup(_fileno(procstdout()));
// Check the error status returned by dup.
if (jitstdoutFd != -1)
{
_setmode(jitstdoutFd, _O_TEXT);
jitstdout = _fdopen(jitstdoutFd, "w");
assert(jitstdout != nullptr);
// Prevent the FILE* from buffering its output in order to avoid calls to
// `fflush()` throughout the code.
setvbuf(jitstdout, nullptr, _IONBF, 0);
}
}
}
#endif // !_HOST_UNIX_
// If jitstdout is still null, fallback to whatever procstdout() was
// initially set to.
if (jitstdout == nullptr)
{
jitstdout = procstdout();
}
#ifdef FEATURE_TRACELOGGING
JitTelemetry::NotifyDllProcessAttach();
#endif
Compiler::compStartup();
g_jitInitialized = true;
}
