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Overview
| Comment: | Fix a case where the mapped part of a database file may be written during a backup operation. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | experimental-mmap |
| Files: | files | file ages | folders |
| SHA1: | c8d67aefff7299dd5c8abeb2a3a52109c0a823ee |
| User & Date: | dan 2013-03-22 19:17:45 |
Context
|
2013-03-22
| ||
| 19:56 | Fix a potential NULL-pointer dereference in btreeSwapOutMmap(). check-in: e81ccdcd user: drh tags: experimental-mmap | |
| 19:17 | Fix a case where the mapped part of a database file may be written during a backup operation. check-in: c8d67aef user: dan tags: experimental-mmap | |
| 18:20 | Allow the database file to be memory mapped in wal mode. check-in: d190ddab user: dan tags: experimental-mmap | |
Changes
Changes to src/backup.c.
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iOff+=pgszSrc
){
PgHdr *pSrcPg = 0;
const Pgno iSrcPg = (Pgno)((iOff/pgszSrc)+1);
rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
if( rc==SQLITE_OK ){
u8 *zData = sqlite3PagerGetData(pSrcPg);
rc = sqlite3OsWrite(pFile, zData, pgszSrc, iOff);
}
sqlite3PagerUnref(pSrcPg);
}
if( rc==SQLITE_OK ){
rc = backupTruncateFile(pFile, iSize);
}
|
| |
516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 |
iOff+=pgszSrc
){
PgHdr *pSrcPg = 0;
const Pgno iSrcPg = (Pgno)((iOff/pgszSrc)+1);
rc = sqlite3PagerGet(pSrcPager, iSrcPg, &pSrcPg);
if( rc==SQLITE_OK ){
u8 *zData = sqlite3PagerGetData(pSrcPg);
rc = sqlite3PagerWriteData(pDestPager, zData, pgszSrc, iOff);
}
sqlite3PagerUnref(pSrcPg);
}
if( rc==SQLITE_OK ){
rc = backupTruncateFile(pFile, iSize);
}
|
Changes to test/permutations.test.
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 |
test_suite "mmap" -prefix "mm-" -description {
Similar to veryquick. Except with memory mapping enabled.
} -presql {
pragma mmap_size = -65536;
} -files [
test_set $allquicktests -exclude *malloc* *ioerr* *fault* \
multiplex* server1.test shared2.test shared6.test
]
test_suite "valgrind" -prefix "" -description {
Run the "veryquick" test suite with a couple of multi-process tests (that
fail under valgrind) omitted.
} -files [
test_set $allquicktests -exclude *malloc* *ioerr* *fault* wal.test atof1.test
|
| |
140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 |
test_suite "mmap" -prefix "mm-" -description {
Similar to veryquick. Except with memory mapping enabled.
} -presql {
pragma mmap_size = -65536;
} -files [
test_set $allquicktests -exclude *malloc* *ioerr* *fault* \
multiplex* server1.test shared2.test shared6.test
]
test_suite "valgrind" -prefix "" -description {
Run the "veryquick" test suite with a couple of multi-process tests (that
fail under valgrind) omitted.
} -files [
test_set $allquicktests -exclude *malloc* *ioerr* *fault* wal.test atof1.test
|
Changes to test/speed1p.test.
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return $txt
}
# Create a database schema.
#
do_test speed1p-1.0 {
execsql {
PRAGMA page_size=1024;
PRAGMA cache_size=500;
PRAGMA locking_mode=EXCLUSIVE;
CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT);
CREATE INDEX i2a ON t2(a);
CREATE INDEX i2b ON t2(b);
|
> > > |
61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 |
return $txt
}
# Create a database schema.
#
do_test speed1p-1.0 {
execsql {
PRAGMA mmap_size=65536;
PRAGMA journal_mode=wal;
PRAGMA page_size=1024;
PRAGMA cache_size=500;
PRAGMA locking_mode=EXCLUSIVE;
CREATE TABLE t1(a INTEGER, b INTEGER, c TEXT);
CREATE TABLE t2(a INTEGER, b INTEGER, c TEXT);
CREATE INDEX i2a ON t2(a);
CREATE INDEX i2b ON t2(b);
|