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Diffstat (limited to 'compiler-rt/lib/xray/xray_init.cc')
-rw-r--r-- | compiler-rt/lib/xray/xray_init.cc | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/compiler-rt/lib/xray/xray_init.cc b/compiler-rt/lib/xray/xray_init.cc deleted file mode 100644 index be5d762675f..00000000000 --- a/compiler-rt/lib/xray/xray_init.cc +++ /dev/null @@ -1,68 +0,0 @@ -//===-- xray_init.cc --------------------------------------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file is a part of XRay, a dynamic runtime instrumentation system. -// -// XRay initialisation logic. -//===----------------------------------------------------------------------===// - -#include <atomic> -#include <fcntl.h> -#include <strings.h> -#include <unistd.h> - -#include "sanitizer_common/sanitizer_common.h" -#include "xray_flags.h" -#include "xray_interface_internal.h" -#include "llvm/Support/ELF.h" - -extern "C" { -extern 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. -// -std::atomic<bool> XRayInitialized{false}; - -// This should always be updated before XRayInitialized is updated. -std::atomic<__xray::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() { - 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); - - // FIXME: Check the flag/environment before patching. - if (flags()->patch_premain) - __xray_patch(); -} - -__attribute__((section(".preinit_array"), - used)) void (*__local_xray_preinit)(void) = __xray_init; |