diff options
Diffstat (limited to 'contrib/compiler-rt/lib/xray/xray_init.cc')
| -rw-r--r-- | contrib/compiler-rt/lib/xray/xray_init.cc | 29 |
1 files changed, 15 insertions, 14 deletions
diff --git a/contrib/compiler-rt/lib/xray/xray_init.cc b/contrib/compiler-rt/lib/xray/xray_init.cc index eb86182..aa660ba 100644 --- a/contrib/compiler-rt/lib/xray/xray_init.cc +++ b/contrib/compiler-rt/lib/xray/xray_init.cc @@ -12,7 +12,6 @@ // XRay initialisation logic. //===----------------------------------------------------------------------===// -#include <atomic> #include <fcntl.h> #include <strings.h> #include <unistd.h> @@ -26,9 +25,10 @@ extern "C" { void __xray_init(); extern const XRaySledEntry __start_xray_instr_map[] __attribute__((weak)); extern const XRaySledEntry __stop_xray_instr_map[] __attribute__((weak)); +extern const XRayFunctionSledIndex __start_xray_fn_idx[] __attribute__((weak)); +extern const XRayFunctionSledIndex __stop_xray_fn_idx[] __attribute__((weak)); } -using namespace __sanitizer; using namespace __xray; // When set to 'true' this means the XRay runtime has been initialised. We use @@ -38,29 +38,30 @@ using namespace __xray; // // FIXME: Support DSO instrumentation maps too. The current solution only works // for statically linked executables. -std::atomic<bool> XRayInitialized{false}; +__sanitizer::atomic_uint8_t XRayInitialized{0}; // This should always be updated before XRayInitialized is updated. -std::atomic<__xray::XRaySledMap> XRayInstrMap{}; +__sanitizer::SpinMutex XRayInstrMapMutex; +XRaySledMap XRayInstrMap; // __xray_init() will do the actual loading of the current process' memory map // and then proceed to look for the .xray_instr_map section/segment. void __xray_init() XRAY_NEVER_INSTRUMENT { - InitializeFlags(); + initializeFlags(); if (__start_xray_instr_map == nullptr) { Report("XRay instrumentation map missing. Not initializing XRay.\n"); return; } - // Now initialize the XRayInstrMap global struct with the address of the - // entries, reinterpreted as an array of XRaySledEntry objects. We use the - // virtual pointer we have from the section to provide us the correct - // information. - __xray::XRaySledMap SledMap{}; - SledMap.Sleds = __start_xray_instr_map; - SledMap.Entries = __stop_xray_instr_map - __start_xray_instr_map; - XRayInstrMap.store(SledMap, std::memory_order_release); - XRayInitialized.store(true, std::memory_order_release); + { + __sanitizer::SpinMutexLock Guard(&XRayInstrMapMutex); + XRayInstrMap.Sleds = __start_xray_instr_map; + XRayInstrMap.Entries = __stop_xray_instr_map - __start_xray_instr_map; + XRayInstrMap.SledsIndex = __start_xray_fn_idx; + XRayInstrMap.Functions = __stop_xray_fn_idx - __start_xray_fn_idx; + } + __sanitizer::atomic_store(&XRayInitialized, true, + __sanitizer::memory_order_release); if (flags()->patch_premain) __xray_patch(); |
