Linux: Use upstream google-breakpad instead of our fork....

breakpad/linux/linux_libc_support.h

-// Copyright (c) 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This header provides replacements for libc functions that we need. We if
-// call the libc functions directly we risk crashing in the dynamic linker as
-// it tries to resolve uncached PLT entries.
-
-#ifndef CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
-#define CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
-
-#include <stdint.h>
-#include <limits.h>
-#include <sys/types.h>
-
-extern "C" {
-
-static inline size_t
-my_strlen(const char* s) {
-  size_t len = 0;
-  while (*s++) len++;
-  return len;
-}
-
-static inline int
-my_strcmp(const char* a, const char* b) {
-  for (;;) {
-    if (*a < *b)
-      return -1;
-    else if (*a > *b)
-      return 1;
-    else if (*a == 0)
-      return 0;
-    a++;
-    b++;
-  }
-}
-
-static inline int
-my_strncmp(const char* a, const char* b, size_t len) {
-  for (size_t i = 0; i < len; ++i) {
-    if (*a < *b)
-      return -1;
-    else if (*a > *b)
-      return 1;
-    else if (*a == 0)
-      return 0;
-    a++;
-    b++;
-  }
-
-  return 0;
-}
-
-// Parse a non-negative integer.
-//   result: (output) the resulting non-negative integer
-//   s: a NUL terminated string
-// Return true iff successful.
-static inline bool
-my_strtoui(int* result, const char* s) {
-  if (*s == 0)
-    return false;
-  int r = 0;
-  for (;; s++) {
-    if (*s == 0)
-      break;
-    const int old_r = r;
-    r *= 10;
-    if (*s < '0' || *s > '9')
-      return false;
-    r += *s - '0';
-    if (r < old_r)
-      return false;
-  }
-
-  *result = r;
-  return true;
-}
-
-// Return the length of the given, non-negative integer when expressed in base
-// 10.
-static inline unsigned
-my_int_len(int i) {
-  if (!i)
-    return 1;
-
-  int len = 0;
-  while (i) {
-    len++;
-    i /= 10;
-  }
-
-  return len;
-}
-
-// Convert a non-negative integer to a string
-//   output: (output) the resulting string is written here. This buffer must be
-//     large enough to hold the resulting string. Call |my_int_len| to get the
-//     required length.
-//   i: the non-negative integer to serialise.
-//   i_len: the length of the integer in base 10 (see |my_int_len|).
-static inline void
-my_itos(char* output, int i, unsigned i_len) {
-  for (unsigned index = i_len; index; --index, i /= 10)
-    output[index - 1] = '0' + (i % 10);
-}
-
-static inline const char*
-my_strchr(const char* haystack, char needle) {
-  while (*haystack && *haystack != needle)
-    haystack++;
-  if (*haystack == needle)
-    return haystack;
-  return (const char*) 0;
-}
-
-// Read a hex value
-//   result: (output) the resulting value
-//   s: a string
-// Returns a pointer to the first invalid charactor.
-static inline const char*
-my_read_hex_ptr(uintptr_t* result, const char* s) {
-  uintptr_t r = 0;
-
-  for (;; ++s) {
-    if (*s >= '0' && *s <= '9') {
-      r <<= 4;
-      r += *s - '0';
-    } else if (*s >= 'a' && *s <= 'f') {
-      r <<= 4;
-      r += (*s - 'a') + 10;
-    } else if (*s >= 'A' && *s <= 'F') {
-      r <<= 4;
-      r += (*s - 'A') + 10;
-    } else {
-      break;
-    }
-  }
-
-  *result = r;
-  return s;
-}
-
-static inline void
-my_memset(void* ip, char c, size_t len) {
-  char* p = (char *) ip;
-  while (len--)
-    *p++ = c;
-}
-
-}  // extern "C"
-
-#endif  // CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_