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593eff42ca
This patch improves several things for Linux/ARM: - Better detection of the number of CPUs on the target device. The content of /proc/cpuinfo only matches the number of "online" CPUs, which varies over time with recent Android devices. - Reconstruct the CPUID and ELF hwcaps values from /proc/cpuinfo, this is useful to better identify target devices in minidumps. - Make minidump_dump display the new information in useful ways. - Write a small helper class to parse /proc/cpuinfo and also use it for x86/64. - Write a small helper class to parse sysfds cpu lists. - Add a my_memchr() implementation. - Add unit tests. Tested on a Nexus S (1 CPU), Galaxy Nexus (2 CPUs) and a Nexus 4 (4 CPUs). Review URL: https://breakpad.appspot.com/540003 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1160 4c0a9323-5329-0410-9bdc-e9ce6186880e
96 lines
3.7 KiB
C
96 lines
3.7 KiB
C
// Copyright (c) 2009, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// This header provides replacements for libc functions that we need. We if
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// call the libc functions directly we risk crashing in the dynamic linker as
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// it tries to resolve uncached PLT entries.
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#ifndef CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
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#define CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
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#include <stdint.h>
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#include <limits.h>
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#include <sys/types.h>
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extern "C" {
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extern size_t my_strlen(const char* s);
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extern int my_strcmp(const char* a, const char* b);
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extern int my_strncmp(const char* a, const char* b, size_t len);
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// Parse a non-negative integer.
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// result: (output) the resulting non-negative integer
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// s: a NUL terminated string
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// Return true iff successful.
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extern bool my_strtoui(int* result, const char* s);
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// Return the length of the given unsigned integer when expressed in base 10.
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extern unsigned my_uint_len(uintmax_t i);
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// Convert an unsigned integer to a string
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// output: (output) the resulting string is written here. This buffer must be
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// large enough to hold the resulting string. Call |my_uint_len| to get the
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// required length.
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// i: the unsigned integer to serialise.
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// i_len: the length of the integer in base 10 (see |my_uint_len|).
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extern void my_uitos(char* output, uintmax_t i, unsigned i_len);
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extern const char* my_strchr(const char* haystack, char needle);
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extern const char* my_strrchr(const char* haystack, char needle);
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// Read a hex value
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// result: (output) the resulting value
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// s: a string
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// Returns a pointer to the first invalid charactor.
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extern const char* my_read_hex_ptr(uintptr_t* result, const char* s);
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extern const char* my_read_decimal_ptr(uintptr_t* result, const char* s);
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extern void my_memset(void* ip, char c, size_t len);
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extern void* my_memchr(const void* src, int c, size_t len);
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// The following are considered safe to use in a compromised environment.
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// Besides, this gives the compiler an opportunity to optimize their calls.
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#define my_memcpy memcpy
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#define my_memmove memmove
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#define my_memcmp memcmp
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extern size_t my_strlcpy(char* s1, const char* s2, size_t len);
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extern size_t my_strlcat(char* s1, const char* s2, size_t len);
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extern int my_isspace(int ch);
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} // extern "C"
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#endif // CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
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