libdb/SOURCES/db-5.3.28-condition-variable-ppc.patch
2021-09-09 20:02:51 +00:00

136 lines
4.8 KiB
Diff

diff -up db-5.3.28/src/dbinc_auto/int_def.in.pthreads_ppc db-5.3.28/src/dbinc_auto/int_def.in
--- db-5.3.28/src/dbinc_auto/int_def.in.pthreads_ppc 2017-06-26 15:06:09.282020804 +0200
+++ db-5.3.28/src/dbinc_auto/int_def.in 2017-06-26 15:06:22.238771039 +0200
@@ -1572,6 +1572,7 @@
#define __os_strerror __os_strerror@DB_VERSION_UNIQUE_NAME@
#define __os_posix_err __os_posix_err@DB_VERSION_UNIQUE_NAME@
#define __os_fileid __os_fileid@DB_VERSION_UNIQUE_NAME@
+#define __check_lock_fn __check_lock_fn@DB_VERSION_UNIQUE_NAME@
#define __os_fdlock __os_fdlock@DB_VERSION_UNIQUE_NAME@
#define __os_fsync __os_fsync@DB_VERSION_UNIQUE_NAME@
#define __os_getenv __os_getenv@DB_VERSION_UNIQUE_NAME@
diff -up db-5.3.28/src/dbinc_auto/os_ext.h.pthreads_ppc db-5.3.28/src/dbinc_auto/os_ext.h
--- db-5.3.28/src/dbinc_auto/os_ext.h.pthreads_ppc 2017-06-26 15:05:23.792897700 +0200
+++ db-5.3.28/src/dbinc_auto/os_ext.h 2017-06-26 15:06:22.172772311 +0200
@@ -41,6 +41,7 @@ void __os_set_errno __P((int));
char *__os_strerror __P((int, char *, size_t));
int __os_posix_err __P((int));
int __os_fileid __P((ENV *, const char *, int, u_int8_t *));
+int __check_lock_fn __P((char *, pid_t));
int __os_fdlock __P((ENV *, DB_FH *, off_t, db_lockmode_t, int));
int __os_fsync __P((ENV *, DB_FH *));
int __os_getenv __P((ENV *, const char *, char **, size_t));
diff -up db-5.3.28/src/env/env_region.c.pthreads_ppc db-5.3.28/src/env/env_region.c
--- db-5.3.28/src/env/env_region.c.pthreads_ppc 2017-06-26 15:04:40.805726365 +0200
+++ db-5.3.28/src/env/env_region.c 2017-06-26 15:04:40.807726326 +0200
@@ -305,14 +305,6 @@ user_map_functions:
goto creation;
}
- /* We have an old environment but cannot rebuild it safely. */
- if (ret == DB_OLD_VERSION) {
- __db_errx(env, DB_STR("1539",
- "Build signature doesn't match environment"));
- ret = DB_VERSION_MISMATCH;
- goto err;
- }
-
if (renv->majver != DB_VERSION_MAJOR ||
renv->minver != DB_VERSION_MINOR) {
/*
@@ -337,6 +329,20 @@ user_map_functions:
goto err;
}
+ /*
+ * We have an old environment but cannot rebuild it safely.
+ * The environment might still be readable by the current process
+ * (only the libpthread timestamp changed) if this process is the one
+ * that is holding the lock on the region file as we can be sure
+ * the environment did not get rebuilt under our feet.
+ */
+ if (ret == DB_OLD_VERSION && __check_lock_fn(env->lockfhp->name, getpid()) ) {
+ __db_errx(env, DB_STR("1539",
+ "Build signature doesn't match environment"));
+ ret = DB_VERSION_MISMATCH;
+ goto err;
+ }
+
/*
* Check if the environment has had a catastrophic failure.
*
diff -up db-5.3.28/src/os/os_flock.c.pthreads_ppc db-5.3.28/src/os/os_flock.c
--- db-5.3.28/src/os/os_flock.c.pthreads_ppc 2017-06-26 15:04:40.806726346 +0200
+++ db-5.3.28/src/os/os_flock.c 2017-06-26 15:04:40.807726326 +0200
@@ -15,6 +15,70 @@ static int __os_filelocking_notsup __P((
#endif
/*
+ * __check_lock_fn --
+ * Parse /proc/locks to see if the file described by 'fn' is locked.
+ * Additionally (if 'pid' is not 0) check if the process holding
+ * the lock has the same pid value as 'pid'.
+ *
+ * Returns 0 if a lock on fn is found, 1 if it is not found and -1 on error.
+ * PUBLIC: int __check_lock_fn __P((char *, pid_t));
+ */
+
+int __check_lock_fn(fn, pid)
+ char *fn;
+ pid_t pid;
+{
+ FILE* fp;
+ char buffer[PATH_MAX];
+ char *token;
+ int i, inode;
+ struct stat st;
+ pid_t lpid = 0;
+
+ if (!fn)
+ return -1;
+
+ fp = fopen("/proc/locks", "r");
+ if (!fp)
+ return -1;
+
+ /* Get the file's inode */
+ if (stat(fn, &st)) {
+ fclose(fp);
+ return -1;
+ }
+
+ while (fgets(buffer, sizeof(buffer), fp))
+ for (token = strtok(buffer, " "), i = 0; token; token = strtok(NULL, " "), i++) {
+ /* Do not parse any other fields */
+ if (i > 5)
+ break;
+ /* Save the PID */
+ if (i == 4)
+ lpid = atoi(token);
+ /* Check the inode */
+ else if (i == 5) {
+ inode = 0;
+ sscanf(token, "%*02x:%*02x:%d", &inode);
+ /* Not the inode we are looking for */
+ if (inode != st.st_ino)
+ continue;
+ /*
+ * We have the correct file.
+ * We are either looking for a specific process or we do not care at all.
+ */
+ if (!pid || lpid == pid) {
+ fclose(fp);
+ return 0;
+ }
+ /* Not the lock we are looking for */
+ }
+ }
+ fclose(fp);
+ return 1;
+}
+
+/*
* __os_fdlock --
* Acquire/release a lock on a byte in a file.
*