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📁 ..
📄 sancov_flags.cpp(1.64 KB)
📄 sancov_flags.h(1.08 KB)
📄 sancov_flags.inc(777 B)
📄 sanitizer_addrhashmap.h(9.19 KB)
📄 sanitizer_allocator.cpp(8.73 KB)
📄 sanitizer_allocator.h(2.69 KB)
📄 sanitizer_allocator_bytemap.h(3.12 KB)
📄 sanitizer_allocator_checks.cpp(686 B)
📄 sanitizer_allocator_checks.h(2.67 KB)
📄 sanitizer_allocator_combined.h(6.29 KB)
📄 sanitizer_allocator_interface.h(1.83 KB)
📄 sanitizer_allocator_internal.h(2.03 KB)
📄 sanitizer_allocator_local_cache.h(8.95 KB)
📄 sanitizer_allocator_primary32.h(12.64 KB)
📄 sanitizer_allocator_primary64.h(32.71 KB)
📄 sanitizer_allocator_report.cpp(4.68 KB)
📄 sanitizer_allocator_report.h(1.72 KB)
📄 sanitizer_allocator_secondary.h(10.78 KB)
📄 sanitizer_allocator_size_class_map.h(10.12 KB)
📄 sanitizer_allocator_stats.h(2.76 KB)
📄 sanitizer_asm.h(2.57 KB)
📄 sanitizer_atomic.h(1.97 KB)
📄 sanitizer_atomic_clang.h(3.42 KB)
📄 sanitizer_atomic_clang_mips.h(3.77 KB)
📄 sanitizer_atomic_clang_other.h(3.02 KB)
📄 sanitizer_atomic_clang_x86.h(3.77 KB)
📄 sanitizer_atomic_msvc.h(8.53 KB)
📄 sanitizer_bitvector.h(9.43 KB)
📄 sanitizer_bvgraph.h(4.62 KB)
📄 sanitizer_common.cpp(10.13 KB)
📄 sanitizer_common.h(30.64 KB)
📄 sanitizer_common_interceptors.inc(348.66 KB)
📄 sanitizer_common_interceptors_format.inc(16.84 KB)
📄 sanitizer_common_interceptors_ioctl.inc(22.13 KB)
📄 sanitizer_common_interceptors_netbsd_compat.inc(4.07 KB)
📄 sanitizer_common_interceptors_vfork_aarch64.inc.S(1.23 KB)
📄 sanitizer_common_interceptors_vfork_arm.inc.S(1.24 KB)
📄 sanitizer_common_interceptors_vfork_i386.inc.S(1.66 KB)
📄 sanitizer_common_interceptors_vfork_x86_64.inc.S(1.03 KB)
📄 sanitizer_common_interface.inc(2.05 KB)
📄 sanitizer_common_interface_posix.inc(732 B)
📄 sanitizer_common_libcdep.cpp(5.4 KB)
📄 sanitizer_common_nolibc.cpp(1.12 KB)
📄 sanitizer_common_syscalls.inc(85 KB)
📄 sanitizer_coverage_fuchsia.cpp(10.1 KB)
📄 sanitizer_coverage_interface.inc(1.73 KB)
📄 sanitizer_coverage_libcdep_new.cpp(7.39 KB)
📄 sanitizer_coverage_win_dll_thunk.cpp(1.03 KB)
📄 sanitizer_coverage_win_dynamic_runtime_thunk.cpp(1.16 KB)
📄 sanitizer_coverage_win_sections.cpp(3.36 KB)
📄 sanitizer_coverage_win_weak_interception.cpp(1.17 KB)
📄 sanitizer_dbghelp.h(1.44 KB)
📄 sanitizer_deadlock_detector.h(13.28 KB)
📄 sanitizer_deadlock_detector1.cpp(5.6 KB)
📄 sanitizer_deadlock_detector2.cpp(10.84 KB)
📄 sanitizer_deadlock_detector_interface.h(2.66 KB)
📄 sanitizer_errno.cpp(1.09 KB)
📄 sanitizer_errno.h(1.3 KB)
📄 sanitizer_errno_codes.h(1.1 KB)
📄 sanitizer_file.cpp(6.24 KB)
📄 sanitizer_file.h(3.67 KB)
📄 sanitizer_flag_parser.cpp(5.55 KB)
📄 sanitizer_flag_parser.h(5.71 KB)
📄 sanitizer_flags.cpp(3.95 KB)
📄 sanitizer_flags.h(2.13 KB)
📄 sanitizer_flags.inc(12.73 KB)
📄 sanitizer_freebsd.h(3.31 KB)
📄 sanitizer_fuchsia.cpp(16.58 KB)
📄 sanitizer_fuchsia.h(1.03 KB)
📄 sanitizer_getauxval.h(1.73 KB)
📄 sanitizer_glibc_version.h(748 B)
📄 sanitizer_hash.h(1.04 KB)
📄 sanitizer_interceptors_ioctl_netbsd.inc(68.81 KB)
📄 sanitizer_interface_internal.h(5.28 KB)
📄 sanitizer_internal_defs.h(14.28 KB)
📄 sanitizer_lfstack.h(2.08 KB)
📄 sanitizer_libc.cpp(7.21 KB)
📄 sanitizer_libc.h(3.23 KB)
📄 sanitizer_libignore.cpp(4.24 KB)
📄 sanitizer_libignore.h(3.5 KB)
📄 sanitizer_linux.cpp(71.58 KB)
📄 sanitizer_linux.h(5.47 KB)
📄 sanitizer_linux_libcdep.cpp(25.67 KB)
📄 sanitizer_linux_s390.cpp(6.91 KB)
📄 sanitizer_list.h(3.81 KB)
📄 sanitizer_local_address_space_view.h(3.67 KB)
📄 sanitizer_mac.cpp(38.67 KB)
📄 sanitizer_mac.h(2.49 KB)
📄 sanitizer_mac_libcdep.cpp(968 B)
📄 sanitizer_malloc_mac.inc(13.06 KB)
📄 sanitizer_mutex.h(5.17 KB)
📄 sanitizer_netbsd.cpp(9.95 KB)
📄 sanitizer_openbsd.cpp(3.17 KB)
📄 sanitizer_persistent_allocator.cpp(687 B)
📄 sanitizer_persistent_allocator.h(2.31 KB)
📄 sanitizer_placement_new.h(885 B)
📄 sanitizer_platform.h(10.11 KB)
📄 sanitizer_platform_interceptors.h(24.93 KB)
📄 sanitizer_platform_limits_freebsd.cpp(19.79 KB)
📄 sanitizer_platform_limits_freebsd.h(18.41 KB)
📄 sanitizer_platform_limits_linux.cpp(3.32 KB)
📄 sanitizer_platform_limits_netbsd.cpp(109.73 KB)
📄 sanitizer_platform_limits_netbsd.h(81.54 KB)
📄 sanitizer_platform_limits_openbsd.cpp(8.69 KB)
📄 sanitizer_platform_limits_openbsd.h(8.68 KB)
📄 sanitizer_platform_limits_posix.cpp(48.89 KB)
📄 sanitizer_platform_limits_posix.h(40.65 KB)
📄 sanitizer_platform_limits_solaris.cpp(11.93 KB)
📄 sanitizer_platform_limits_solaris.h(12.26 KB)
📄 sanitizer_posix.cpp(11.93 KB)
📄 sanitizer_posix.h(5.14 KB)
📄 sanitizer_posix_libcdep.cpp(16.21 KB)
📄 sanitizer_printf.cpp(12.07 KB)
📄 sanitizer_procmaps.h(2.93 KB)
📄 sanitizer_procmaps_bsd.cpp(3.81 KB)
📄 sanitizer_procmaps_common.cpp(5.27 KB)
📄 sanitizer_procmaps_fuchsia.cpp(2.51 KB)
📄 sanitizer_procmaps_linux.cpp(2.9 KB)
📄 sanitizer_procmaps_mac.cpp(13.7 KB)
📄 sanitizer_procmaps_solaris.cpp(2.18 KB)
📄 sanitizer_ptrauth.h(720 B)
📄 sanitizer_quarantine.h(9.57 KB)
📄 sanitizer_report_decorator.h(1.89 KB)
📄 sanitizer_ring_buffer.h(4.7 KB)
📄 sanitizer_rtems.cpp(7.61 KB)
📄 sanitizer_rtems.h(772 B)
📄 sanitizer_signal_interceptors.inc(2.89 KB)
📄 sanitizer_solaris.cpp(6.6 KB)
📄 sanitizer_stackdepot.cpp(4.54 KB)
📄 sanitizer_stackdepot.h(2.13 KB)
📄 sanitizer_stackdepotbase.h(5.58 KB)
📄 sanitizer_stacktrace.cpp(4.58 KB)
📄 sanitizer_stacktrace.h(5.65 KB)
📄 sanitizer_stacktrace_libcdep.cpp(5.54 KB)
📄 sanitizer_stacktrace_printer.cpp(9.08 KB)
📄 sanitizer_stacktrace_printer.h(3.08 KB)
📄 sanitizer_stacktrace_sparc.cpp(3.05 KB)
📄 sanitizer_stoptheworld.h(2.34 KB)
📄 sanitizer_stoptheworld_fuchsia.cpp(1.28 KB)
📄 sanitizer_stoptheworld_linux_libcdep.cpp(20.8 KB)
📄 sanitizer_stoptheworld_mac.cpp(5.29 KB)
📄 sanitizer_stoptheworld_netbsd_libcdep.cpp(11.02 KB)
📄 sanitizer_suppressions.cpp(5.67 KB)
📄 sanitizer_suppressions.h(1.69 KB)
📄 sanitizer_symbolizer.cpp(3.65 KB)
📄 sanitizer_symbolizer.h(6.62 KB)
📄 sanitizer_symbolizer_fuchsia.h(1.56 KB)
📄 sanitizer_symbolizer_internal.h(5.8 KB)
📄 sanitizer_symbolizer_libbacktrace.cpp(6.1 KB)
📄 sanitizer_symbolizer_libbacktrace.h(1.49 KB)
📄 sanitizer_symbolizer_libcdep.cpp(17.45 KB)
📄 sanitizer_symbolizer_mac.cpp(8.48 KB)
📄 sanitizer_symbolizer_mac.h(1.37 KB)
📄 sanitizer_symbolizer_markup.cpp(5.39 KB)
📄 sanitizer_symbolizer_posix_libcdep.cpp(16.5 KB)
📄 sanitizer_symbolizer_report.cpp(10.01 KB)
📄 sanitizer_symbolizer_rtems.h(1.56 KB)
📄 sanitizer_symbolizer_win.cpp(11.59 KB)
📄 sanitizer_syscall_generic.inc(1.06 KB)
📄 sanitizer_syscall_linux_aarch64.inc(4.58 KB)
📄 sanitizer_syscall_linux_arm.inc(4.58 KB)
📄 sanitizer_syscall_linux_x86_64.inc(3.07 KB)
📄 sanitizer_syscalls_netbsd.inc(120.97 KB)
📄 sanitizer_termination.cpp(2.86 KB)
📄 sanitizer_thread_registry.cpp(10.31 KB)
📄 sanitizer_thread_registry.h(5.44 KB)
📄 sanitizer_tls_get_addr.cpp(5.29 KB)
📄 sanitizer_tls_get_addr.h(2.21 KB)
📄 sanitizer_type_traits.cpp(708 B)
📄 sanitizer_type_traits.h(1.49 KB)
📄 sanitizer_unwind_linux_libcdep.cpp(6.13 KB)
📄 sanitizer_unwind_win.cpp(2.41 KB)
📄 sanitizer_vector.h(2.57 KB)
📄 sanitizer_win.cpp(33.3 KB)
📄 sanitizer_win.h(851 B)
📄 sanitizer_win_defs.h(7.23 KB)
📄 sanitizer_win_dll_thunk.cpp(3.41 KB)
📄 sanitizer_win_dll_thunk.h(11.13 KB)
📄 sanitizer_win_dynamic_runtime_thunk.cpp(1.16 KB)
📄 sanitizer_win_weak_interception.cpp(3.49 KB)
📄 sanitizer_win_weak_interception.h(1.64 KB)
📁 symbolizer
📄 weak_symbols.txt(230 B)

Editing: sanitizer_libc.cpp

//===-- sanitizer_libc.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
//
//===----------------------------------------------------------------------===//
//
// This file is shared between AddressSanitizer and ThreadSanitizer
// run-time libraries. See sanitizer_libc.h for details.
//===----------------------------------------------------------------------===//

#include "sanitizer_allocator_internal.h"
#include "sanitizer_common.h"
#include "sanitizer_libc.h"

namespace __sanitizer {

s64 internal_atoll(const char *nptr) {
  return internal_simple_strtoll(nptr, nullptr, 10);
}

void *internal_memchr(const void *s, int c, uptr n) {
  const char *t = (const char *)s;
  for (uptr i = 0; i < n; ++i, ++t)
    if (*t == c)
      return reinterpret_cast<void *>(const_cast<char *>(t));
  return nullptr;
}

void *internal_memrchr(const void *s, int c, uptr n) {
  const char *t = (const char *)s;
  void *res = nullptr;
  for (uptr i = 0; i < n; ++i, ++t) {
    if (*t == c) res = reinterpret_cast<void *>(const_cast<char *>(t));
  }
  return res;
}

int internal_memcmp(const void* s1, const void* s2, uptr n) {
  const char *t1 = (const char *)s1;
  const char *t2 = (const char *)s2;
  for (uptr i = 0; i < n; ++i, ++t1, ++t2)
    if (*t1 != *t2)
      return *t1 < *t2 ? -1 : 1;
  return 0;
}

void *internal_memcpy(void *dest, const void *src, uptr n) {
  char *d = (char*)dest;
  const char *s = (const char *)src;
  for (uptr i = 0; i < n; ++i)
    d[i] = s[i];
  return dest;
}

void *internal_memmove(void *dest, const void *src, uptr n) {
  char *d = (char*)dest;
  const char *s = (const char *)src;
  sptr i, signed_n = (sptr)n;
  CHECK_GE(signed_n, 0);
  if (d < s) {
    for (i = 0; i < signed_n; ++i)
      d[i] = s[i];
  } else {
    if (d > s && signed_n > 0) {
      for (i = signed_n - 1; i >= 0; --i) {
        d[i] = s[i];
      }
    }
  }
  return dest;
}

void *internal_memset(void* s, int c, uptr n) {
  // Optimize for the most performance-critical case:
  if ((reinterpret_cast<uptr>(s) % 16) == 0 && (n % 16) == 0) {
    u64 *p = reinterpret_cast<u64*>(s);
    u64 *e = p + n / 8;
    u64 v = c;
    v |= v << 8;
    v |= v << 16;
    v |= v << 32;
    for (; p < e; p += 2)
      p[0] = p[1] = v;
    return s;
  }
  // The next line prevents Clang from making a call to memset() instead of the
  // loop below.
  // FIXME: building the runtime with -ffreestanding is a better idea. However
  // there currently are linktime problems due to PR12396.
  char volatile *t = (char*)s;
  for (uptr i = 0; i < n; ++i, ++t) {
    *t = c;
  }
  return s;
}

uptr internal_strcspn(const char *s, const char *reject) {
  uptr i;
  for (i = 0; s[i]; i++) {
    if (internal_strchr(reject, s[i]))
      return i;
  }
  return i;
}

char* internal_strdup(const char *s) {
  uptr len = internal_strlen(s);
  char *s2 = (char*)InternalAlloc(len + 1);
  internal_memcpy(s2, s, len);
  s2[len] = 0;
  return s2;
}

int internal_strcmp(const char *s1, const char *s2) {
  while (true) {
    unsigned c1 = *s1;
    unsigned c2 = *s2;
    if (c1 != c2) return (c1 < c2) ? -1 : 1;
    if (c1 == 0) break;
    s1++;
    s2++;
  }
  return 0;
}

int internal_strncmp(const char *s1, const char *s2, uptr n) {
  for (uptr i = 0; i < n; i++) {
    unsigned c1 = *s1;
    unsigned c2 = *s2;
    if (c1 != c2) return (c1 < c2) ? -1 : 1;
    if (c1 == 0) break;
    s1++;
    s2++;
  }
  return 0;
}

char* internal_strchr(const char *s, int c) {
  while (true) {
    if (*s == (char)c)
      return const_cast<char *>(s);
    if (*s == 0)
      return nullptr;
    s++;
  }
}

char *internal_strchrnul(const char *s, int c) {
  char *res = internal_strchr(s, c);
  if (!res)
    res = const_cast<char *>(s) + internal_strlen(s);
  return res;
}

char *internal_strrchr(const char *s, int c) {
  const char *res = nullptr;
  for (uptr i = 0; s[i]; i++) {
    if (s[i] == c) res = s + i;
  }
  return const_cast<char *>(res);
}

uptr internal_strlen(const char *s) {
  uptr i = 0;
  while (s[i]) i++;
  return i;
}

uptr internal_strlcat(char *dst, const char *src, uptr maxlen) {
  const uptr srclen = internal_strlen(src);
  const uptr dstlen = internal_strnlen(dst, maxlen);
  if (dstlen == maxlen) return maxlen + srclen;
  if (srclen < maxlen - dstlen) {
    internal_memmove(dst + dstlen, src, srclen + 1);
  } else {
    internal_memmove(dst + dstlen, src, maxlen - dstlen - 1);
    dst[maxlen - 1] = '\0';
  }
  return dstlen + srclen;
}

char *internal_strncat(char *dst, const char *src, uptr n) {
  uptr len = internal_strlen(dst);
  uptr i;
  for (i = 0; i < n && src[i]; i++)
    dst[len + i] = src[i];
  dst[len + i] = 0;
  return dst;
}

uptr internal_strlcpy(char *dst, const char *src, uptr maxlen) {
  const uptr srclen = internal_strlen(src);
  if (srclen < maxlen) {
    internal_memmove(dst, src, srclen + 1);
  } else if (maxlen != 0) {
    internal_memmove(dst, src, maxlen - 1);
    dst[maxlen - 1] = '\0';
  }
  return srclen;
}

char *internal_strncpy(char *dst, const char *src, uptr n) {
  uptr i;
  for (i = 0; i < n && src[i]; i++)
    dst[i] = src[i];
  internal_memset(dst + i, '\0', n - i);
  return dst;
}

uptr internal_strnlen(const char *s, uptr maxlen) {
  uptr i = 0;
  while (i < maxlen && s[i]) i++;
  return i;
}

char *internal_strstr(const char *haystack, const char *needle) {
  // This is O(N^2), but we are not using it in hot places.
  uptr len1 = internal_strlen(haystack);
  uptr len2 = internal_strlen(needle);
  if (len1 < len2) return nullptr;
  for (uptr pos = 0; pos <= len1 - len2; pos++) {
    if (internal_memcmp(haystack + pos, needle, len2) == 0)
      return const_cast<char *>(haystack) + pos;
  }
  return nullptr;
}

s64 internal_simple_strtoll(const char *nptr, const char **endptr, int base) {
  CHECK_EQ(base, 10);
  while (IsSpace(*nptr)) nptr++;
  int sgn = 1;
  u64 res = 0;
  bool have_digits = false;
  char *old_nptr = const_cast<char *>(nptr);
  if (*nptr == '+') {
    sgn = 1;
    nptr++;
  } else if (*nptr == '-') {
    sgn = -1;
    nptr++;
  }
  while (IsDigit(*nptr)) {
    res = (res <= UINT64_MAX / 10) ? res * 10 : UINT64_MAX;
    int digit = ((*nptr) - '0');
    res = (res <= UINT64_MAX - digit) ? res + digit : UINT64_MAX;
    have_digits = true;
    nptr++;
  }
  if (endptr) {
    *endptr = (have_digits) ? const_cast<char *>(nptr) : old_nptr;
  }
  if (sgn > 0) {
    return (s64)(Min((u64)INT64_MAX, res));
  } else {
    return (res > INT64_MAX) ? INT64_MIN : ((s64)res * -1);
  }
}

bool mem_is_zero(const char *beg, uptr size) {
  CHECK_LE(size, 1ULL << FIRST_32_SECOND_64(30, 40));  // Sanity check.
  const char *end = beg + size;
  uptr *aligned_beg = (uptr *)RoundUpTo((uptr)beg, sizeof(uptr));
  uptr *aligned_end = (uptr *)RoundDownTo((uptr)end, sizeof(uptr));
  uptr all = 0;
  // Prologue.
  for (const char *mem = beg; mem < (char*)aligned_beg && mem < end; mem++)
    all |= *mem;
  // Aligned loop.
  for (; aligned_beg < aligned_end; aligned_beg++)
    all |= *aligned_beg;
  // Epilogue.
  if ((char *)aligned_end >= beg) {
    for (const char *mem = (char *)aligned_end; mem < end; mem++) all |= *mem;
  }
  return all == 0;
}

} // namespace __sanitizer

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