1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CONTENT_PULIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_ 6 #define CONTENT_PULIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_ 7 8 #include <stdint.h> 9 #include <string> 10 11 #include "content/common/content_export.h" 12 13 namespace content { 14 15 // Returns a file descriptor for a shared memory segment. The 16 // executable flag indicates that the caller intends to use mprotect 17 // with PROT_EXEC after making a mapping, but not that it intends to 18 // mmap with PROT_EXEC in the first place. (Some systems, such as 19 // ChromeOS, disallow PROT_EXEC in mmap on /dev/shm files but do allow 20 // PROT_EXEC in mprotect on mappings from such files. This function 21 // can yield an object that has that constraint.) 22 CONTENT_EXPORT int MakeSharedMemorySegmentViaIPC(size_t length, 23 bool executable); 24 25 // Return a read-only file descriptor to the font which best matches the given 26 // properties or -1 on failure. 27 // charset: specifies the language(s) that the font must cover. See 28 // render_sandbox_host_linux.cc for more information. 29 CONTENT_EXPORT int MatchFontWithFallback(const std::string& face, bool bold, 30 bool italic, int charset); 31 32 // GetFontTable loads a specified font table from an open SFNT file. 33 // fd: a file descriptor to the SFNT file. The position doesn't matter. 34 // table_tag: the table tag in *big-endian* format, or 0 for the entire font. 35 // offset: offset into the table or entire font where loading should start. 36 // The offset must be between 0 and 1 GB - 1. 37 // output: a buffer of size output_length that gets the data. can be 0, in 38 // which case output_length will be set to the required size in bytes. 39 // output_length: size of output, if it's not 0. 40 // 41 // returns: true on success. 42 CONTENT_EXPORT bool GetFontTable(int fd, uint32_t table_tag, off_t offset, 43 uint8_t* output, size_t* output_length); 44 45 }; // namespace content 46 47 #endif // CONTENT_PULIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_ 48
