diff options
Diffstat (limited to 'compiler-rt/lib/xray/xray_init.cc')
| -rw-r--r-- | compiler-rt/lib/xray/xray_init.cc | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/compiler-rt/lib/xray/xray_init.cc b/compiler-rt/lib/xray/xray_init.cc index 8c2a5d380c8..e5dc0d9557d 100644 --- a/compiler-rt/lib/xray/xray_init.cc +++ b/compiler-rt/lib/xray/xray_init.cc @@ -22,18 +22,20 @@ #include "xray_interface_internal.h" extern "C" { -extern void __xray_init(); +void __xray_init(); extern const XRaySledEntry __start_xray_instr_map[] __attribute__((weak)); extern const XRaySledEntry __stop_xray_instr_map[] __attribute__((weak)); } using namespace __xray; -// We initialize some global variables that pertain to specific sections of XRay -// data structures in the binary. We do this for the current process using -// /proc/curproc/map and make sure that we're able to get it. We signal failure -// via a global atomic boolean to indicate whether we've initialized properly. +// When set to 'true' this means the XRay runtime has been initialised. We use +// the weak symbols defined above (__start_xray_inst_map and +// __stop_xray_instr_map) to initialise the instrumentation map that XRay uses +// for runtime patching/unpatching of instrumentation points. // +// FIXME: Support DSO instrumentation maps too. The current solution only works +// for statically linked executables. std::atomic<bool> XRayInitialized{false}; // This should always be updated before XRayInitialized is updated. |
