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_PUBLIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_ 6 #define CONTENT_PUBLIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_ 7 8 #include <stdint.h> 9 #include <string> 10 11 #include "content/common/content_export.h" 12 #include "ppapi/c/trusted/ppb_browser_font_trusted.h" 13 14 namespace content { 15 16 // Returns a file descriptor for a shared memory segment. The 17 // executable flag indicates that the caller intends to use mprotect 18 // with PROT_EXEC after making a mapping, but not that it intends to 19 // mmap with PROT_EXEC in the first place. (Some systems, such as 20 // ChromeOS, disallow PROT_EXEC in mmap on /dev/shm files but do allow 21 // PROT_EXEC in mprotect on mappings from such files. This function 22 // can yield an object that has that constraint.) 23 CONTENT_EXPORT int MakeSharedMemorySegmentViaIPC(size_t length, 24 bool executable); 25 26 // Return a read-only file descriptor to the font which best matches the given 27 // properties or -1 on failure. 28 // charset: specifies the language(s) that the font must cover. See 29 // render_sandbox_host_linux.cc for more information. 30 // fallback_family: If not set to PP_BROWSERFONT_TRUSTED_FAMILY_DEFAULT, font 31 // selection should fall back to generic Windows font names like Arial and 32 // Times New Roman. 33 CONTENT_EXPORT int MatchFontWithFallback( 34 const std::string& face, 35 bool bold, 36 bool italic, 37 int charset, 38 PP_BrowserFont_Trusted_Family fallback_family); 39 40 // GetFontTable loads a specified font table from an open SFNT file. 41 // fd: a file descriptor to the SFNT file. The position doesn't matter. 42 // table_tag: the table tag in *big-endian* format, or 0 for the entire font. 43 // offset: offset into the table or entire font where loading should start. 44 // The offset must be between 0 and 1 GB - 1. 45 // output: a buffer of size output_length that gets the data. can be 0, in 46 // which case output_length will be set to the required size in bytes. 47 // output_length: size of output, if it's not 0. 48 // 49 // returns: true on success. 50 CONTENT_EXPORT bool GetFontTable(int fd, uint32_t table_tag, off_t offset, 51 uint8_t* output, size_t* output_length); 52 53 // Sends a zygote child "ping" message to browser process via socket |fd|. 54 // Returns true on success. 55 CONTENT_EXPORT bool SendZygoteChildPing(int fd); 56 57 }; // namespace content 58 59 #endif // CONTENT_PUBLIC_COMMON_CHILD_PROCESS_SANDBOX_SUPPORT_LINUX_H_ 60
