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//===-- sanitizer_symbolizer_libcdep.cc -----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries.
//===----------------------------------------------------------------------===//
#include "sanitizer_platform.h"
#include "sanitizer_internal_defs.h"
#include "sanitizer_placement_new.h"
#include "sanitizer_symbolizer.h"
namespace __sanitizer {
Symbolizer *Symbolizer::CreateAndStore(const char *path_to_external) {
Symbolizer *platform_symbolizer = PlatformInit(path_to_external);
if (!platform_symbolizer)
return Disable();
atomic_store(&symbolizer_, reinterpret_cast<uptr>(platform_symbolizer),
memory_order_release);
return platform_symbolizer;
}
Symbolizer *Symbolizer::Init(const char *path_to_external) {
CHECK_EQ(0, atomic_load(&symbolizer_, memory_order_acquire));
return CreateAndStore(path_to_external);
}
Symbolizer *Symbolizer::GetOrInit() {
static StaticSpinMutex init_mu;
uptr sym = atomic_load(&symbolizer_, memory_order_acquire);
if (!sym) {
SpinMutexLock l(&init_mu);
sym = atomic_load(&symbolizer_, memory_order_relaxed);
if (!sym) return CreateAndStore(0);
}
return reinterpret_cast<Symbolizer *>(sym);
}
} // namespace __sanitizer
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