head	1.4;
access;
symbols
	netbsd-11-0-RC4:1.3
	netbsd-11-0-RC3:1.3
	netbsd-11-0-RC2:1.3
	netbsd-11-0-RC1:1.3
	gcc-14-3-0:1.1.1.3
	perseant-exfatfs-base-20250801:1.3
	netbsd-11:1.3.0.4
	netbsd-11-base:1.3
	gcc-12-5-0:1.1.1.2
	perseant-exfatfs-base-20240630:1.3
	gcc-12-4-0:1.1.1.2
	perseant-exfatfs:1.3.0.2
	perseant-exfatfs-base:1.3
	gcc-12-3-0:1.1.1.2
	gcc-10-5-0:1.1.1.1
	gcc-10-4-0:1.1.1.1
	cjep_sun2x:1.2.0.4
	cjep_sun2x-base:1.2
	cjep_staticlib_x-base1:1.2
	cjep_staticlib_x:1.2.0.2
	cjep_staticlib_x-base:1.2
	gcc-10-3-0:1.1.1.1
	FSF:1.1.1;
locks; strict;
comment	@// @;


1.4
date	2025.09.14.00.08.58;	author mrg;	state Exp;
branches;
next	1.3;
commitid	x9D5QEnvbeMI4CaG;

1.3
date	2023.07.31.01.44.57;	author mrg;	state Exp;
branches;
next	1.2;
commitid	q79F5Opf0FLsyTyE;

1.2
date	2021.04.11.23.54.28;	author mrg;	state dead;
branches;
next	1.1;
commitid	wJn7ggfUTEMOWVOC;

1.1
date	2021.04.10.22.09.21;	author mrg;	state Exp;
branches
	1.1.1.1;
next	;
commitid	eC4g0MRpqTvEkNOC;

1.1.1.1
date	2021.04.10.22.09.21;	author mrg;	state Exp;
branches;
next	1.1.1.2;
commitid	eC4g0MRpqTvEkNOC;

1.1.1.2
date	2023.07.30.05.20.40;	author mrg;	state Exp;
branches;
next	1.1.1.3;
commitid	tk6nV4mbc9nVEMyE;

1.1.1.3
date	2025.09.13.23.45.04;	author mrg;	state Exp;
branches;
next	;
commitid	KwhwN4krNWa6XBaG;


desc
@@


1.4
log
@merge GCC 14.3.0.
@
text
@//===-- sanitizer_tls_get_addr.cpp ----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Handle the __tls_get_addr call.
//
//===----------------------------------------------------------------------===//

#include "sanitizer_tls_get_addr.h"

#include "sanitizer_allocator_interface.h"
#include "sanitizer_atomic.h"
#include "sanitizer_flags.h"
#include "sanitizer_platform_interceptors.h"

namespace __sanitizer {
#if SANITIZER_INTERCEPT_TLS_GET_ADDR

// The actual parameter that comes to __tls_get_addr
// is a pointer to a struct with two words in it:
struct TlsGetAddrParam {
  uptr dso_id;
  uptr offset;
};

// This must be static TLS
__attribute__((tls_model("initial-exec")))
static __thread DTLS dtls;

// Make sure we properly destroy the DTLS objects:
// this counter should never get too large.
static atomic_uintptr_t number_of_live_dtls;

static const uptr kDestroyedThread = -1;

static void DTLS_Deallocate(DTLS::DTVBlock *block) {
  VReport(2, "__tls_get_addr: DTLS_Deallocate %p\n", (void *)block);
  UnmapOrDie(block, sizeof(DTLS::DTVBlock));
  atomic_fetch_sub(&number_of_live_dtls, 1, memory_order_relaxed);
}

static DTLS::DTVBlock *DTLS_NextBlock(atomic_uintptr_t *cur) {
  uptr v = atomic_load(cur, memory_order_acquire);
  if (v == kDestroyedThread)
    return nullptr;
  DTLS::DTVBlock *next = (DTLS::DTVBlock *)v;
  if (next)
    return next;
  DTLS::DTVBlock *new_dtv =
      (DTLS::DTVBlock *)MmapOrDie(sizeof(DTLS::DTVBlock), "DTLS_NextBlock");
  uptr prev = 0;
  if (!atomic_compare_exchange_strong(cur, &prev, (uptr)new_dtv,
                                      memory_order_seq_cst)) {
    UnmapOrDie(new_dtv, sizeof(DTLS::DTVBlock));
    return (DTLS::DTVBlock *)prev;
  }
  uptr num_live_dtls =
      atomic_fetch_add(&number_of_live_dtls, 1, memory_order_relaxed);
  VReport(2, "__tls_get_addr: DTLS_NextBlock %p %zd\n", (void *)&dtls,
          num_live_dtls);
  return new_dtv;
}

static DTLS::DTV *DTLS_Find(uptr id) {
  VReport(2, "__tls_get_addr: DTLS_Find %p %zd\n", (void *)&dtls, id);
  static constexpr uptr kPerBlock = ARRAY_SIZE(DTLS::DTVBlock::dtvs);
  DTLS::DTVBlock *cur = DTLS_NextBlock(&dtls.dtv_block);
  if (!cur)
    return nullptr;
  for (; id >= kPerBlock; id -= kPerBlock) cur = DTLS_NextBlock(&cur->next);
  return cur->dtvs + id;
}

void DTLS_Destroy() {
  if (!common_flags()->intercept_tls_get_addr) return;
  VReport(2, "__tls_get_addr: DTLS_Destroy %p\n", (void *)&dtls);
  DTLS::DTVBlock *block = (DTLS::DTVBlock *)atomic_exchange(
      &dtls.dtv_block, kDestroyedThread, memory_order_release);
  while (block) {
    DTLS::DTVBlock *next =
        (DTLS::DTVBlock *)atomic_load(&block->next, memory_order_acquire);
    DTLS_Deallocate(block);
    block = next;
  }
}

#if defined(__powerpc64__) || defined(__mips__)
// This is glibc's TLS_DTV_OFFSET:
// "Dynamic thread vector pointers point 0x8000 past the start of each
//  TLS block." (sysdeps/<arch>/dl-tls.h)
static const uptr kDtvOffset = 0x8000;
#elif defined(__riscv)
// This is glibc's TLS_DTV_OFFSET:
// "Dynamic thread vector pointers point 0x800 past the start of each
// TLS block." (sysdeps/riscv/dl-tls.h)
static const uptr kDtvOffset = 0x800;
#else
static const uptr kDtvOffset = 0;
#endif

extern "C" {
SANITIZER_WEAK_ATTRIBUTE
uptr __sanitizer_get_allocated_size(const void *p);

SANITIZER_WEAK_ATTRIBUTE
const void *__sanitizer_get_allocated_begin(const void *p);
}

DTLS::DTV *DTLS_on_tls_get_addr(void *arg_void, void *res,
                                uptr static_tls_begin, uptr static_tls_end) {
  if (!common_flags()->intercept_tls_get_addr) return 0;
  TlsGetAddrParam *arg = reinterpret_cast<TlsGetAddrParam *>(arg_void);
  uptr dso_id = arg->dso_id;
  DTLS::DTV *dtv = DTLS_Find(dso_id);
  if (!dtv || dtv->beg)
    return 0;
  uptr tls_size = 0;
  uptr tls_beg = reinterpret_cast<uptr>(res) - arg->offset - kDtvOffset;
  VReport(2,
          "__tls_get_addr: %p {0x%zx,0x%zx} => %p; tls_beg: 0x%zx; sp: %p "
          "num_live_dtls %zd\n",
          (void *)arg, arg->dso_id, arg->offset, res, tls_beg, (void *)&tls_beg,
          atomic_load(&number_of_live_dtls, memory_order_relaxed));
  if (dtls.last_memalign_ptr == tls_beg) {
    tls_size = dtls.last_memalign_size;
    VReport(2, "__tls_get_addr: glibc <=2.24 suspected; tls={0x%zx,0x%zx}\n",
            tls_beg, tls_size);
  } else if (tls_beg >= static_tls_begin && tls_beg < static_tls_end) {
    // This is the static TLS block which was initialized / unpoisoned at thread
    // creation.
    VReport(2, "__tls_get_addr: static tls: 0x%zx\n", tls_beg);
    tls_size = 0;
  } else if (const void *start =
                 __sanitizer_get_allocated_begin((void *)tls_beg)) {
    tls_beg = (uptr)start;
    tls_size = __sanitizer_get_allocated_size(start);
    VReport(2, "__tls_get_addr: glibc >=2.25 suspected; tls={0x%zx,0x%zx}\n",
            tls_beg, tls_size);
  } else {
    VReport(2, "__tls_get_addr: Can't guess glibc version\n");
    // This may happen inside the DTOR of main thread, so just ignore it.
    tls_size = 0;
  }
  dtv->beg = tls_beg;
  dtv->size = tls_size;
  return dtv;
}

void DTLS_on_libc_memalign(void *ptr, uptr size) {
  if (!common_flags()->intercept_tls_get_addr) return;
  VReport(2, "DTLS_on_libc_memalign: %p 0x%zx\n", ptr, size);
  dtls.last_memalign_ptr = reinterpret_cast<uptr>(ptr);
  dtls.last_memalign_size = size;
}

DTLS *DTLS_Get() { return &dtls; }

bool DTLSInDestruction(DTLS *dtls) {
  return atomic_load(&dtls->dtv_block, memory_order_relaxed) ==
         kDestroyedThread;
}

#else
void DTLS_on_libc_memalign(void *ptr, uptr size) {}
DTLS::DTV *DTLS_on_tls_get_addr(void *arg, void *res,
  unsigned long, unsigned long) { return 0; }
DTLS *DTLS_Get() { return 0; }
void DTLS_Destroy() {}
bool DTLSInDestruction(DTLS *dtls) {
  UNREACHABLE("dtls is unsupported on this platform!");
}

#endif  // SANITIZER_INTERCEPT_TLS_GET_ADDR

}  // namespace __sanitizer
@


1.3
log
@make this actually be GCC 12.3.0's libsanitizer.

the libsanitizer we used with GCC 9 and GCC 10 was significantly
ahead of the GCC 9 and GCC 10 provided versions.
@
text
@d15 1
a29 7
// Glibc starting from 2.19 allocates tls using __signal_safe_memalign,
// which has such header.
struct Glibc_2_19_tls_header {
  uptr size;
  uptr start;
};

d105 8
d130 1
a130 1
    VReport(2, "__tls_get_addr: glibc <=2.18 suspected; tls={0x%zx,0x%zx}\n",
d137 5
a141 6
  } else if ((tls_beg % 4096) == sizeof(Glibc_2_19_tls_header)) {
    // We may want to check gnu_get_libc_version().
    Glibc_2_19_tls_header *header = (Glibc_2_19_tls_header *)tls_beg - 1;
    tls_size = header->size;
    tls_beg = header->start;
    VReport(2, "__tls_get_addr: glibc >=2.19 suspected; tls={0x%zx 0x%zx}\n",
@


1.2
log
@revert sanitizer back to the version we were using with GCC 9, since
that one was already newer than the GCC 10 version.
@
text
@d15 1
d46 3
a48 4
static inline void DTLS_Deallocate(DTLS::DTV *dtv, uptr size) {
  if (!size) return;
  VReport(2, "__tls_get_addr: DTLS_Deallocate %p %zd\n", dtv, size);
  UnmapOrDie(dtv, size * sizeof(DTLS::DTV));
d52 15
a66 6
static inline void DTLS_Resize(uptr new_size) {
  if (dtls.dtv_size >= new_size) return;
  new_size = RoundUpToPowerOfTwo(new_size);
  new_size = Max(new_size, 4096UL / sizeof(DTLS::DTV));
  DTLS::DTV *new_dtv =
      (DTLS::DTV *)MmapOrDie(new_size * sizeof(DTLS::DTV), "DTLS_Resize");
d69 13
a81 10
  VReport(2, "__tls_get_addr: DTLS_Resize %p %zd\n", &dtls, num_live_dtls);
  CHECK_LT(num_live_dtls, 1 << 20);
  uptr old_dtv_size = dtls.dtv_size;
  DTLS::DTV *old_dtv = dtls.dtv;
  if (old_dtv_size)
    internal_memcpy(new_dtv, dtls.dtv, dtls.dtv_size * sizeof(DTLS::DTV));
  dtls.dtv = new_dtv;
  dtls.dtv_size = new_size;
  if (old_dtv_size)
    DTLS_Deallocate(old_dtv, old_dtv_size);
d86 9
a94 4
  VReport(2, "__tls_get_addr: DTLS_Destroy %p %zd\n", &dtls, dtls.dtv_size);
  uptr s = dtls.dtv_size;
  dtls.dtv_size = kDestroyedThread;  // Do this before unmap for AS-safety.
  DTLS_Deallocate(dtls.dtv, s);
d100 1
a100 1
//  TLS block."
d102 5
d116 3
a118 3
  if (dtls.dtv_size == kDestroyedThread) return 0;
  DTLS_Resize(dso_id + 1);
  if (dtls.dtv[dso_id].beg) return 0;
d121 4
a124 3
  VReport(2, "__tls_get_addr: %p {%p,%p} => %p; tls_beg: %p; sp: %p "
             "num_live_dtls %zd\n",
          arg, arg->dso_id, arg->offset, res, tls_beg, &tls_beg,
d128 2
a129 2
    VReport(2, "__tls_get_addr: glibc <=2.18 suspected; tls={%p,%p}\n",
        tls_beg, tls_size);
d133 1
a133 1
    VReport(2, "__tls_get_addr: static tls: %p\n", tls_beg);
d140 2
a141 2
    VReport(2, "__tls_get_addr: glibc >=2.19 suspected; tls={%p %p}\n",
        tls_beg, tls_size);
d147 3
a149 3
  dtls.dtv[dso_id].beg = tls_beg;
  dtls.dtv[dso_id].size = tls_size;
  return dtls.dtv + dso_id;
d154 1
a154 1
  VReport(2, "DTLS_on_libc_memalign: %p %p\n", ptr, size);
d162 2
a163 1
  return dtls->dtv_size == kDestroyedThread;
@


1.1
log
@Initial revision
@
text
@@


1.1.1.1
log
@initial import of GCC 10.3.0.  main changes include:

caveats:
- ABI issue between c++14 and c++17 fixed
- profile mode is removed from libstdc++
- -fno-common is now the default

new features:
- new flags -fallocation-dce, -fprofile-partial-training,
  -fprofile-reproducible, -fprofile-prefix-path, and -fanalyzer
- many new compile and link time optimisations
- enhanced drive optimisations
- openacc 2.6 support
- openmp 5.0 features
- new warnings: -Wstring-compare and -Wzero-length-bounds
- extended warnings: -Warray-bounds, -Wformat-overflow,
  -Wrestrict, -Wreturn-local-addr, -Wstringop-overflow,
  -Warith-conversion, -Wmismatched-tags, and -Wredundant-tags
- some likely C2X features implemented
- more C++20 implemented
- many new arm & intel CPUs known

hundreds of reported bugs are fixed.  full list of changes
can be found at:

   https://gcc.gnu.org/gcc-10/changes.html
@
text
@@


1.1.1.2
log
@initial import of GCC 12.3.0.

major changes in GCC 11 included:

- The default mode for C++ is now -std=gnu++17 instead of -std=gnu++14.
- When building GCC itself, the host compiler must now support C++11,
  rather than C++98.
- Some short options of the gcov tool have been renamed: -i to -j and
  -j to -H.
- ThreadSanitizer improvements.
- Introduce Hardware-assisted AddressSanitizer support.
- For targets that produce DWARF debugging information GCC now defaults
  to DWARF version 5. This can produce up to 25% more compact debug
  information compared to earlier versions.
- Many optimisations.
- The existing malloc attribute has been extended so that it can be
  used to identify allocator/deallocator API pairs. A pair of new
  -Wmismatched-dealloc and -Wmismatched-new-delete warnings are added.
- Other new warnings:
  -Wsizeof-array-div, enabled by -Wall, warns about divisions of two
    sizeof operators when the first one is applied to an array and the
    divisor does not equal the size of the array element.
  -Wstringop-overread, enabled by default, warns about calls to string
    functions reading past the end of the arrays passed to them as
    arguments.
  -Wtsan, enabled by default, warns about unsupported features in
    ThreadSanitizer (currently std::atomic_thread_fence).
- Enchanced warnings:
  -Wfree-nonheap-object detects many more instances of calls to
    deallocation functions with pointers not returned from a dynamic
    memory allocation function.
  -Wmaybe-uninitialized diagnoses passing pointers or references to
    uninitialized memory to functions taking const-qualified arguments.
  -Wuninitialized detects reads from uninitialized dynamically
    allocated memory.
  -Warray-parameter warns about functions with inconsistent array forms.
  -Wvla-parameter warns about functions with inconsistent VLA forms.
- Several new features from the upcoming C2X revision of the ISO C
  standard are supported with -std=c2x and -std=gnu2x.
- Several C++20 features have been implemented.
- The C++ front end has experimental support for some of the upcoming
  C++23 draft.
- Several new C++ warnings.
- Enhanced Arm, AArch64, x86, and RISC-V CPU support.
- The implementation of how program state is tracked within
  -fanalyzer has been completely rewritten with many enhancements.

see https://gcc.gnu.org/gcc-11/changes.html for a full list.

major changes in GCC 12 include:

- An ABI incompatibility between C and C++ when passing or returning
  by value certain aggregates containing zero width bit-fields has
  been discovered on various targets. x86-64, ARM and AArch64
  will always ignore them (so there is a C ABI incompatibility
  between GCC 11 and earlier with GCC 12 or later), PowerPC64 ELFv2
  always take them into account (so there is a C++ ABI
  incompatibility, GCC 4.4 and earlier compatible with GCC 12 or
  later, incompatible with GCC 4.5 through GCC 11). RISC-V has
  changed the handling of these already starting with GCC 10. As
  the ABI requires, MIPS takes them into account handling function
  return values so there is a C++ ABI incompatibility with GCC 4.5
  through 11.
- STABS: Support for emitting the STABS debugging format is
  deprecated and will be removed in the next release. All ports now
  default to emit DWARF (version 2 or later) debugging info or are
  obsoleted.
- Vectorization is enabled at -O2 which is now equivalent to the
  original -O2 -ftree-vectorize -fvect-cost-model=very-cheap.
- GCC now supports the ShadowCallStack sanitizer.
- Support for __builtin_shufflevector compatible with the clang
  language extension was added.
- Support for attribute unavailable was added.
- Support for __builtin_dynamic_object_size compatible with the
  clang language extension was added.
- New warnings:
  -Wbidi-chars warns about potentially misleading UTF-8
    bidirectional control characters.
  -Warray-compare warns about comparisons between two operands of
    array type.
- Some new features from the upcoming C2X revision of the ISO C
  standard are supported with -std=c2x and -std=gnu2x.
- Several C++23 features have been implemented.
- Many C++ enhancements across warnings and -f options.

see https://gcc.gnu.org/gcc-12/changes.html for a full list.
@
text
@a14 1
#include "sanitizer_atomic.h"
d45 4
a48 3
static void DTLS_Deallocate(DTLS::DTVBlock *block) {
  VReport(2, "__tls_get_addr: DTLS_Deallocate %p\n", (void *)block);
  UnmapOrDie(block, sizeof(DTLS::DTVBlock));
d52 6
a57 15
static DTLS::DTVBlock *DTLS_NextBlock(atomic_uintptr_t *cur) {
  uptr v = atomic_load(cur, memory_order_acquire);
  if (v == kDestroyedThread)
    return nullptr;
  DTLS::DTVBlock *next = (DTLS::DTVBlock *)v;
  if (next)
    return next;
  DTLS::DTVBlock *new_dtv =
      (DTLS::DTVBlock *)MmapOrDie(sizeof(DTLS::DTVBlock), "DTLS_NextBlock");
  uptr prev = 0;
  if (!atomic_compare_exchange_strong(cur, &prev, (uptr)new_dtv,
                                      memory_order_seq_cst)) {
    UnmapOrDie(new_dtv, sizeof(DTLS::DTVBlock));
    return (DTLS::DTVBlock *)prev;
  }
d60 10
a69 13
  VReport(2, "__tls_get_addr: DTLS_NextBlock %p %zd\n", (void *)&dtls,
          num_live_dtls);
  return new_dtv;
}

static DTLS::DTV *DTLS_Find(uptr id) {
  VReport(2, "__tls_get_addr: DTLS_Find %p %zd\n", (void *)&dtls, id);
  static constexpr uptr kPerBlock = ARRAY_SIZE(DTLS::DTVBlock::dtvs);
  DTLS::DTVBlock *cur = DTLS_NextBlock(&dtls.dtv_block);
  if (!cur)
    return nullptr;
  for (; id >= kPerBlock; id -= kPerBlock) cur = DTLS_NextBlock(&cur->next);
  return cur->dtvs + id;
d74 4
a77 9
  VReport(2, "__tls_get_addr: DTLS_Destroy %p\n", (void *)&dtls);
  DTLS::DTVBlock *block = (DTLS::DTVBlock *)atomic_exchange(
      &dtls.dtv_block, kDestroyedThread, memory_order_release);
  while (block) {
    DTLS::DTVBlock *next =
        (DTLS::DTVBlock *)atomic_load(&block->next, memory_order_acquire);
    DTLS_Deallocate(block);
    block = next;
  }
d83 1
a83 1
//  TLS block." (sysdeps/<arch>/dl-tls.h)
a84 5
#elif defined(__riscv)
// This is glibc's TLS_DTV_OFFSET:
// "Dynamic thread vector pointers point 0x800 past the start of each
// TLS block." (sysdeps/riscv/dl-tls.h)
static const uptr kDtvOffset = 0x800;
d94 3
a96 3
  DTLS::DTV *dtv = DTLS_Find(dso_id);
  if (!dtv || dtv->beg)
    return 0;
d99 3
a101 4
  VReport(2,
          "__tls_get_addr: %p {0x%zx,0x%zx} => %p; tls_beg: 0x%zx; sp: %p "
          "num_live_dtls %zd\n",
          (void *)arg, arg->dso_id, arg->offset, res, tls_beg, (void *)&tls_beg,
d105 2
a106 2
    VReport(2, "__tls_get_addr: glibc <=2.18 suspected; tls={0x%zx,0x%zx}\n",
            tls_beg, tls_size);
d110 1
a110 1
    VReport(2, "__tls_get_addr: static tls: 0x%zx\n", tls_beg);
d117 2
a118 2
    VReport(2, "__tls_get_addr: glibc >=2.19 suspected; tls={0x%zx 0x%zx}\n",
            tls_beg, tls_size);
d124 3
a126 3
  dtv->beg = tls_beg;
  dtv->size = tls_size;
  return dtv;
d131 1
a131 1
  VReport(2, "DTLS_on_libc_memalign: %p 0x%zx\n", ptr, size);
d139 1
a139 2
  return atomic_load(&dtls->dtv_block, memory_order_relaxed) ==
         kDestroyedThread;
@


1.1.1.3
log
@initial import of GCC 14.3.0.

major changes in GCC 13:
- improved sanitizer
- zstd debug info compression
- LTO improvements
- SARIF based diagnostic support
- new warnings: -Wxor-used-as-pow, -Wenum-int-mismatch, -Wself-move,
  -Wdangling-reference
- many new -Wanalyzer* specific warnings
- enhanced warnings: -Wpessimizing-move, -Wredundant-move
- new attributes to mark file descriptors, c++23 "assume"
- several C23 features added
- several C++23 features added
- many new features for Arm, x86, RISC-V

major changes in GCC 14:
- more strict C99 or newer support
- ia64* marked deprecated (but seemingly still in GCC 15.)
- several new hardening features
- support for "hardbool", which can have user supplied values of true/false
- explicit support for stack scrubbing upon function exit
- better auto-vectorisation support
- added clang-compatible __has_feature and __has_extension
- more C23, including -std=c23
- several C++26 features added
- better diagnostics in C++ templates
- new warnings: -Wnrvo, Welaborated-enum-base
- many new features for Arm, x86, RISC-V
- possible ABI breaking change for SPARC64 and small structures with arrays
  of floats.
@
text
@a14 1
#include "sanitizer_allocator_interface.h"
d29 7
a110 8
extern "C" {
SANITIZER_WEAK_ATTRIBUTE
uptr __sanitizer_get_allocated_size(const void *p);

SANITIZER_WEAK_ATTRIBUTE
const void *__sanitizer_get_allocated_begin(const void *p);
}

d128 1
a128 1
    VReport(2, "__tls_get_addr: glibc <=2.24 suspected; tls={0x%zx,0x%zx}\n",
d135 6
a140 5
  } else if (const void *start =
                 __sanitizer_get_allocated_begin((void *)tls_beg)) {
    tls_beg = (uptr)start;
    tls_size = __sanitizer_get_allocated_size(start);
    VReport(2, "__tls_get_addr: glibc >=2.25 suspected; tls={0x%zx,0x%zx}\n",
@