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Enable Perf JITEvents by default #37682

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merged 3 commits into from
Oct 2, 2020
Merged

Enable Perf JITEvents by default #37682

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fdbc86e
default to USE_PERF_JITEVENTS=1
vchuravy Sep 18, 2020
fdfac75
allow users to enable GDB JIT integration on release builds
vchuravy Sep 21, 2020
b2220ed
Update perf docs a bit
vchuravy Sep 21, 2020
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allow users to enable GDB JIT integration on release builds
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@vchuravy
vchuravy committed Sep 21, 2020
commit fdfac757dfff129eb92a731ddd5b668700541cca
6 changes: 6 additions & 0 deletions doc/src/manual/environment-variables.md
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Expand Up @@ -314,6 +314,12 @@ event listener for just-in-time (JIT) profiling.
* [OProfile](http:https://oprofile.sourceforge.net/news/) (`USE_OPROFILE_JITEVENTS` set to `1`
in the build configuration).

### `ENABLE_GDBLISTENER`

If set to anything besides `0` enables GDB registration of Julia code on release builds.
On debug builds of Julia this is always enabled. Recommended to use with `-g 2`.


### `JULIA_LLVM_ARGS`

Arguments to be passed to the LLVM backend.
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7 changes: 3 additions & 4 deletions src/codegen.cpp
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Expand Up @@ -7728,10 +7728,9 @@ extern "C" void jl_init_llvm(void)
std::string DL = jl_data_layout.getStringRepresentation() + "-ni:10:11:12:13";
jl_data_layout.reset(DL);

// Register GDB event listener
#ifdef JL_DEBUG_BUILD
jl_ExecutionEngine->RegisterJITEventListener(JITEventListener::createGDBRegistrationListener());
#endif
// Register GDB event listener
if(jl_using_gdb_jitevents)
jl_ExecutionEngine->RegisterJITEventListener(JITEventListener::createGDBRegistrationListener());

#ifdef JL_USE_INTEL_JITEVENTS
if (jl_using_intel_jitevents)
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11 changes: 11 additions & 0 deletions src/init.c
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Expand Up @@ -436,6 +436,8 @@ char jl_using_oprofile_jitevents = 0; // Non-zero if running under OProfile
char jl_using_perf_jitevents = 0;
#endif

char jl_using_gdb_jitevents = 0;

int isabspath(const char *in) JL_NOTSAFEPOINT
{
#ifdef _OS_WINDOWS_
Expand Down Expand Up @@ -692,6 +694,15 @@ void _julia_init(JL_IMAGE_SEARCH rel)
}
#endif

#if defined(JL_DEBUG_BUILD)
jl_using_gdb_jitevents = 1;
# else
const char *jit_gdb = getenv("ENABLE_GDBLISTENER");
if (jit_gdb && atoi(jit_gdb)) {
jl_using_gdb_jitevents = 1;
}
#endif

if ((jl_options.outputo || jl_options.outputbc || jl_options.outputasm) &&
(jl_options.code_coverage || jl_options.malloc_log)) {
jl_error("cannot generate code-coverage or track allocation information while generating a .o, .bc, or .s output file");
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1 change: 1 addition & 0 deletions src/julia_internal.h
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Expand Up @@ -595,6 +595,7 @@ extern char jl_using_oprofile_jitevents;
#ifdef JL_USE_PERF_JITEVENTS
extern char jl_using_perf_jitevents;
#endif
extern char jl_using_gdb_jitevents;
extern size_t jl_arr_xtralloc_limit;

// -- init.c -- //
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