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xorg-x11-server
b_cache-xkbcomp-output-for-fast-start-up.patch
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File b_cache-xkbcomp-output-for-fast-start-up.patch of Package xorg-x11-server
From 0f70ba9d3412b17ac4e08e33e1be3c226c06ea54 Mon Sep 17 00:00:00 2001 From: Yan Li <yan.i.li@intel.com> Date: Tue, 12 May 2009 17:49:07 +0800 Subject: [PATCH] XKB: cache xkbcomp output for fast start-up v5 for 1.6.1 Organization: Intel xkbcomp outputs will be cached in files with hashed keymap as names. This saves boot time for around 1s on commodity netbooks. Signed-off-by: Yan Li <yan.i.li@intel.com> ================================================================================ --- xorg-server-1.7.99/configure.ac +++ xorg-server-1.7.99/configure.ac @@ -527,9 +527,9 @@ AC_ARG_WITH(xkb-path, AS_HELP_STRING([--with-xkb-path=PATH], [Path to XKB base dir (default: ${datadir}/X11/xkb)]), [ XKBPATH="$withval" ], [ XKBPATH="${datadir}/X11/xkb" ]) -AC_ARG_WITH(xkb-output, AS_HELP_STRING([--with-xkb-output=PATH], [Path to XKB output dir (default: ${datadir}/X11/xkb/compiled)]), +AC_ARG_WITH(xkb-output, AS_HELP_STRING([--with-xkb-output=PATH], [Path to XKB output dir (default: ${localstatedir}/cache/xkb)]), [ XKBOUTPUT="$withval" ], - [ XKBOUTPUT="compiled" ]) + [ XKBOUTPUT="${localstatedir}/cache/xkb" ]) AC_ARG_WITH(default-xkb-rules, AS_HELP_STRING([--with-default-xkb-rules=RULES], [Keyboard ruleset (default: base/evdev)]), [ XKB_DFLT_RULES="$withval" ], @@ -1160,7 +1160,7 @@ dnl Make sure XKM_OUTPUT_DIR is an absolute path XKBOUTPUT_FIRSTCHAR=`echo $XKBOUTPUT | cut -b 1` if [[ x$XKBOUTPUT_FIRSTCHAR != x/ -a x$XKBOUTPUT_FIRSTCHAR != 'x$' ]] ; then - XKBOUTPUT="$XKB_BASE_DIRECTORY/$XKBOUTPUT" + AC_MSG_ERROR([xkb-output must be an absolute path.]) fi dnl XKM_OUTPUT_DIR (used in code) must end in / or file names get hosed --- xorg-server-1.7.99/xkb/README.compiled +++ xorg-server-1.7.99/xkb/README.compiled @@ -4,10 +4,10 @@ or some other tool might destroy or replace the files in this directory, so it is not a safe place to store compiled keymaps for long periods of time. The default keymap for any server is usually stored in: - X<num>-default.xkm -where <num> is the display number of the server in question, which makes -it possible for several servers *on the same host* to share the same -directory. + server-<SHA1>.xkm + +where <SHA1> is the SHA1 hash of keymap source, so that compiled +keymap of different keymap sources are stored in different files. Unless the X server is modified, sharing this directory between servers on different hosts could cause problems. --- xorg-server-1.9.0/xkb/ddxLoad.c.orig 2010-07-14 22:23:17.000000000 +0200 +++ xorg-server-1.9.0/xkb/ddxLoad.c 2010-08-23 15:23:47.000000000 +0200 @@ -30,6 +30,12 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE. #include <xkb-config.h> +#ifdef HAVE_SHA1_IN_LIBMD /* Use libmd for SHA1 */ +# include <sha1.h> +#else /* Use OpenSSL's libcrypto */ +# include <stddef.h> /* buggy openssl/sha.h wants size_t */ +# include <openssl/sha.h> +#endif #include <stdio.h> #include <ctype.h> #include <X11/X.h> @@ -43,24 +49,13 @@ THE USE OR PERFORMANCE OF THIS SOFTWARE. #define XKBSRV_NEED_FILE_FUNCS #include <xkbsrv.h> #include <X11/extensions/XI.h> +#include <errno.h> #include "xkb.h" #if defined(CSRG_BASED) || defined(linux) || defined(__GNU__) #include <paths.h> #endif - /* - * If XKM_OUTPUT_DIR specifies a path without a leading slash, it is - * relative to the top-level XKB configuration directory. - * Making the server write to a subdirectory of that directory - * requires some work in the general case (install procedure - * has to create links to /var or somesuch on many machines), - * so we just compile into /usr/tmp for now. - */ -#ifndef XKM_OUTPUT_DIR -#define XKM_OUTPUT_DIR "compiled/" -#endif - #define PRE_ERROR_MSG "\"The XKEYBOARD keymap compiler (xkbcomp) reports:\"" #define ERROR_PREFIX "\"> \"" #define POST_ERROR_MSG1 "\"Errors from xkbcomp are not fatal to the X server\"" @@ -175,6 +170,45 @@ OutputDirectory( } static Bool +Sha1Asc(char sha1Asc[SHA_DIGEST_LENGTH*2+1], const char * input) +{ + int i; + unsigned char sha1[SHA_DIGEST_LENGTH]; + +#ifdef HAVE_SHA1_IN_LIBMD /* Use libmd for SHA1 */ + SHA1_CTX ctx; + + SHA1Init (&ctx); + SHA1Update (&ctx, input, strlen(input)); + SHA1Final (sha1, &ctx); +#else /* Use OpenSSL's libcrypto */ + SHA_CTX ctx; + int success; + + success = SHA1_Init (&ctx); + if (! success) + return BadAlloc; + + success = SHA1_Update (&ctx, input, strlen(input)); + if (! success) + return BadAlloc; + + success = SHA1_Final (sha1, &ctx); + if (! success) + return BadAlloc; +#endif + + /* convert sha1 to sha1_asc */ + for(i=0; i<SHA_DIGEST_LENGTH; ++i) { + sprintf(sha1Asc+i*2, "%02X", sha1[i]); + } + + return Success; +} + +/* call xkbcomp and compile XKB keymap, return xkm file name in + nameRtrn */ +static Bool XkbDDXCompileKeymapByNames( XkbDescPtr xkb, XkbComponentNamesPtr names, unsigned want, @@ -183,7 +217,11 @@ XkbDDXCompileKeymapByNames( XkbDescPtr int nameRtrnLen) { FILE * out; - char *buf = NULL, keymap[PATH_MAX], xkm_output_dir[PATH_MAX]; + char * buf = NULL, xkmfile[PATH_MAX], xkm_output_dir[PATH_MAX]; + char * tmpXkmFile = NULL; + char * canonicalXkmFileName = NULL; + char sha1Asc[SHA_DIGEST_LENGTH*2+1], xkbKeyMapBuf[100*1024]; + int ret, result; const char *emptystring = ""; char *xkbbasedirflag = NULL; @@ -194,15 +232,70 @@ XkbDDXCompileKeymapByNames( XkbDescPtr /* WIN32 has no popen. The input must be stored in a file which is used as input for xkbcomp. xkbcomp does not read from stdin. */ char tmpname[PATH_MAX]; - const char *xkmfile = tmpname; + const char *xkbfile = tmpname; #else - const char *xkmfile = "-"; + const char *xkbfile = "-"; +#endif + + /* Write keymap source (xkbfile) to memory buffer `xkbKeyMapBuf', + of which SHA1 is generated and used as result xkm file name */ + memset(xkbKeyMapBuf, 0, sizeof(xkbKeyMapBuf)); + out = fmemopen(xkbKeyMapBuf, sizeof(xkbKeyMapBuf), "w"); + if (NULL == out) { + ErrorF("[xkb] Open xkbKeyMapBuf for writing failed\n"); + return FALSE; + } + ret = XkbWriteXKBKeymapForNames(out, names, xkb, want, need); + if (fclose(out) !=0) + { + ErrorF("[xkb] XkbWriteXKBKeymapForNames error, perhaps xkbKeyMapBuf is too small\n"); + return FALSE; + } +#ifdef DEBUG + if (xkbDebugFlags) { + ErrorF("[xkb] XkbDDXCompileKeymapByNames compiling keymap:\n"); + fputs(xkbKeyMapBuf, stderr); + } #endif + if (!ret) { + ErrorF("[xkb] Generating XKB Keymap failed, giving up compiling keymap\n"); + return FALSE; + } - snprintf(keymap, sizeof(keymap), "server-%s", display); + DebugF("[xkb] computing SHA1 of keymap\n"); + if (Success == Sha1Asc(sha1Asc, xkbKeyMapBuf)) { + snprintf(xkmfile, sizeof(xkmfile), "server-%s", sha1Asc); + } + else { + ErrorF("[xkb] Computing SHA1 of keymap failed, " + "using display name instead as xkm file name\n"); + snprintf(xkmfile, sizeof(xkmfile), "server-%s", display); + } OutputDirectory(xkm_output_dir, sizeof(xkm_output_dir)); + /* set nameRtrn, fail if it's too small */ + if ((strlen(xkmfile)+1 > nameRtrnLen) && nameRtrn) { + ErrorF("[xkb] nameRtrn too small to hold xkmfile name\n"); + return FALSE; + } + strncpy(nameRtrn, xkmfile, nameRtrnLen); + + /* if the xkm file already exists, reuse it */ + canonicalXkmFileName = Xprintf("%s%s.xkm", xkm_output_dir, xkmfile); + if (access(canonicalXkmFileName, R_OK) == 0) { + /* yes, we can reuse the old xkm file */ + LogMessage(X_INFO, "XKB: reuse xkmfile %s\n", canonicalXkmFileName); + result = TRUE; + goto _ret; + } + LogMessage(X_INFO, "XKB: generating xkmfile %s\n", canonicalXkmFileName); + + /* continue to call xkbcomp to compile the keymap. to avoid race + condition, we compile it to a tmpfile then rename it to + xkmfile */ + + #ifdef WIN32 strcpy(tmpname, Win32TempDir()); strcat(tmpname, "\\xkb_XXXXXX"); @@ -225,14 +318,20 @@ XkbDDXCompileKeymapByNames( XkbDescPtr } } + if ( (tmpXkmFile = tempnam(xkm_output_dir, NULL)) == NULL ) { + ErrorF("[xkb] Can't generate temp xkm file name"); + result = FALSE; + goto _ret; + } + buf = Xprintf("\"%s%sxkbcomp\" -w %d %s -xkm \"%s\" " - "-em1 %s -emp %s -eml %s \"%s%s.xkm\"", + "-em1 %s -emp %s -eml %s \"%s\"", xkbbindir, xkbbindirsep, ( (xkbDebugFlags < 2) ? 1 : ((xkbDebugFlags > 10) ? 10 : (int)xkbDebugFlags) ), - xkbbasedirflag ? xkbbasedirflag : "", xkmfile, + xkbbasedirflag ? xkbbasedirflag : "", xkbfile, PRE_ERROR_MSG, ERROR_PREFIX, POST_ERROR_MSG1, - xkm_output_dir, keymap); + tmpXkmFile); free(xkbbasedirflag); @@ -240,7 +339,12 @@ XkbDDXCompileKeymapByNames( XkbDescPtr LogMessage(X_ERROR, "XKB: Could not invoke xkbcomp: not enough memory\n"); return FALSE; } - + + /* there's a potential race condition between calling tempnam() + and invoking xkbcomp to write the result file (potential temp + file name conflicts), but since xkbcomp is a standalone + program, we have to live with this */ + #ifndef WIN32 out= Popen(buf,"w"); #else @@ -248,31 +352,42 @@ XkbDDXCompileKeymapByNames( XkbDescPtr #endif if (out!=NULL) { -#ifdef DEBUG - if (xkbDebugFlags) { - ErrorF("[xkb] XkbDDXCompileKeymapByNames compiling keymap:\n"); - XkbWriteXKBKeymapForNames(stderr,names,xkb,want,need); - } -#endif - XkbWriteXKBKeymapForNames(out,names,xkb,want,need); + /* write XKBKeyMapBuf to xkbcomp */ + if (EOF==fputs(xkbKeyMapBuf, out)) + { + ErrorF("[xkb] Sending keymap to xkbcomp failed\n"); + result = FALSE; + goto _ret; + } #ifndef WIN32 if (Pclose(out)==0) #else if (fclose(out)==0 && System(buf) >= 0) #endif { + /* xkbcomp success */ if (xkbDebugFlags) DebugF("[xkb] xkb executes: %s\n",buf); - if (nameRtrn) { - strncpy(nameRtrn,keymap,nameRtrnLen); - nameRtrn[nameRtrnLen-1]= '\0'; + /* if canonicalXkmFileName already exists now, we simply + overwrite it, this is OK */ + ret = rename(tmpXkmFile, canonicalXkmFileName); + if (0 != ret) { + ErrorF("[xkb] Can't rename %s to %s, error: %s\n", + tmpXkmFile, canonicalXkmFileName, + strerror(errno)); + + /* in case of error, don't unlink tmpXkmFile, leave it + for debugging */ + + result = FALSE; + goto _ret; } - if (buf != NULL) - free(buf); - return TRUE; + + result = TRUE; + goto _ret; } else - LogMessage(X_ERROR, "Error compiling keymap (%s)\n", keymap); + LogMessage(X_ERROR, "Error compiling keymap (%s)\n", xkbfile); #ifdef WIN32 /* remove the temporary file */ unlink(tmpname); @@ -289,7 +404,17 @@ XkbDDXCompileKeymapByNames( XkbDescPtr nameRtrn[0]= '\0'; if (buf != NULL) free(buf); - return FALSE; + result = FALSE; + +_ret: + if (tmpXkmFile) + free(tmpXkmFile); + if (canonicalXkmFileName) + xfree(canonicalXkmFileName); + if (buf != NULL) + xfree (buf); + + return result; } static FILE * @@ -373,7 +498,6 @@ unsigned missing; DebugF("Loaded XKB keymap %s, defined=0x%x\n",fileName,(*xkbRtrn)->defined); } fclose(file); - (void) unlink (fileName); return (need|want)&(~missing); }
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