breakpad/src/common/linux/linux_libc_support.cc
Ian Barkley-Yeung f5123d7196 Add #include <config.h> to the beginning of all cc files
Added
 #ifdef HAVE_CONFIG_H
 #include <config.h>
 #endif
to the beginning of all source files that didn't have it.

This ensures that configuration options are respected in all source
files. In particular, it ensures that the defines needed to fix Large
File System issues are set before including system headers.

More generally, it ensures consistency between the source files, and
avoids the possibility of ODR violations between source files that were
including config.h and source files that were not.

Process:
Ran
find . \( -name third_party -prune \) -o \( -name '.git*' -prune \) -o \( \( -name '*.cc' -o -name '*.c' \) -exec sed -i '0,/^#include/ s/^#include/#ifdef HAVE_CONFIG_H\n#include <config.h>  \/\/ Must come first\n#endif\n\n#include/' {} + \)
and then manually fixed up src/common/linux/guid_creator.cc,
src/tools/solaris/dump_syms/testdata/dump_syms_regtest.cc,
src/tools/windows/dump_syms/testdata/dump_syms_regtest.cc,
src/common/stabs_reader.h, and src/common/linux/breakpad_getcontext.h.

BUG=google-breakpad:877
Fixed: google-breakpad:877
TEST=./configure && make && make check
TEST=Did the find/sed in ChromeOS's copy, ensured emerge-hana google-breakpad
worked and had fewer LFS violations.
TEST=Did the find/sed in Chrome's copy, ensured compiling hana, windows, linux, and
eve still worked (since Chrome doesn't used config.h)

Change-Id: I16cededbba0ea0c28e919b13243e35300999e799
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/4289676
Reviewed-by: Mike Frysinger <vapier@chromium.org>
2023-02-27 19:31:32 +00:00

241 lines
5.7 KiB
C++

// Copyright 2012 Google LLC
//
// 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 LLC 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 source file provides replacements for libc functions that we need. If
// we call the libc functions directly we risk crashing in the dynamic linker
// as it tries to resolve uncached PLT entries.
#ifdef HAVE_CONFIG_H
#include <config.h> // Must come first
#endif
#include "common/linux/linux_libc_support.h"
#include <stddef.h>
extern "C" {
size_t my_strlen(const char* s) {
size_t len = 0;
while (*s++) len++;
return len;
}
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++;
}
}
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.
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 unsigned integer when expressed in base 10.
unsigned my_uint_len(uintmax_t i) {
if (!i)
return 1;
int len = 0;
while (i) {
len++;
i /= 10;
}
return len;
}
// Convert an unsigned 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_uint_len| to get the
// required length.
// i: the unsigned integer to serialise.
// i_len: the length of the integer in base 10 (see |my_uint_len|).
void my_uitos(char* output, uintmax_t i, unsigned i_len) {
for (unsigned index = i_len; index; --index, i /= 10)
output[index - 1] = '0' + (i % 10);
}
const char* my_strchr(const char* haystack, char needle) {
while (*haystack && *haystack != needle)
haystack++;
if (*haystack == needle)
return haystack;
return (const char*) 0;
}
const char* my_strrchr(const char* haystack, char needle) {
const char* ret = NULL;
while (*haystack) {
if (*haystack == needle)
ret = haystack;
haystack++;
}
return ret;
}
void* my_memchr(const void* src, int needle, size_t src_len) {
const unsigned char* p = (const unsigned char*)src;
const unsigned char* p_end = p + src_len;
for (; p < p_end; ++p) {
if (*p == needle)
return (void*)p;
}
return NULL;
}
// Read a hex value
// result: (output) the resulting value
// s: a string
// Returns a pointer to the first invalid charactor.
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;
}
const char* my_read_decimal_ptr(uintptr_t* result, const char* s) {
uintptr_t r = 0;
for (;; ++s) {
if (*s >= '0' && *s <= '9') {
r *= 10;
r += *s - '0';
} else {
break;
}
}
*result = r;
return s;
}
void my_memset(void* ip, char c, size_t len) {
char* p = (char*) ip;
while (len--)
*p++ = c;
}
size_t my_strlcpy(char* s1, const char* s2, size_t len) {
size_t pos1 = 0;
size_t pos2 = 0;
while (s2[pos2] != '\0') {
if (pos1 + 1 < len) {
s1[pos1] = s2[pos2];
pos1++;
}
pos2++;
}
if (len > 0)
s1[pos1] = '\0';
return pos2;
}
size_t my_strlcat(char* s1, const char* s2, size_t len) {
size_t pos1 = 0;
while (pos1 < len && s1[pos1] != '\0')
pos1++;
if (pos1 == len)
return pos1;
return pos1 + my_strlcpy(s1 + pos1, s2, len - pos1);
}
int my_isspace(int ch) {
// Matches the C locale.
const char spaces[] = " \t\f\n\r\t\v";
for (size_t i = 0; i < sizeof(spaces); i++) {
if (ch == spaces[i])
return 1;
}
return 0;
}
} // extern "C"