|
|
|
|
/*-------------------------------------------------------------------------
|
|
|
|
|
*
|
|
|
|
|
* dfmgr.c
|
|
|
|
|
* Dynamic function manager code.
|
|
|
|
|
*
|
|
|
|
|
* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
|
|
|
|
|
* Portions Copyright (c) 1994, Regents of the University of California
|
|
|
|
|
*
|
|
|
|
|
*
|
|
|
|
|
* IDENTIFICATION
|
|
|
|
|
* src/backend/utils/fmgr/dfmgr.c
|
|
|
|
|
*
|
|
|
|
|
*-------------------------------------------------------------------------
|
|
|
|
|
*/
|
|
|
|
|
#include "postgres.h"
|
|
|
|
|
|
|
|
|
|
#include <sys/stat.h>
|
|
|
|
|
|
|
|
|
|
#ifndef WIN32
|
|
|
|
|
#include <dlfcn.h>
|
|
|
|
|
#endif /* !WIN32 */
|
|
|
|
|
|
|
|
|
|
#include "fmgr.h"
|
|
|
|
|
#include "lib/stringinfo.h"
|
|
|
|
|
#include "miscadmin.h"
|
|
|
|
|
#include "storage/fd.h"
|
Create an infrastructure for parallel computation in PostgreSQL.
This does four basic things. First, it provides convenience routines
to coordinate the startup and shutdown of parallel workers. Second,
it synchronizes various pieces of state (e.g. GUCs, combo CID
mappings, transaction snapshot) from the parallel group leader to the
worker processes. Third, it prohibits various operations that would
result in unsafe changes to that state while parallelism is active.
Finally, it propagates events that would result in an ErrorResponse,
NoticeResponse, or NotifyResponse message being sent to the client
from the parallel workers back to the master, from which they can then
be sent on to the client.
Robert Haas, Amit Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke.
Suggestions and review from Andres Freund, Heikki Linnakangas, Noah
Misch, Simon Riggs, Euler Taveira, and Jim Nasby.
11 years ago
|
|
|
#include "storage/shmem.h"
|
|
|
|
|
#include "utils/hsearch.h"
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* signature for PostgreSQL-specific library init function */
|
|
|
|
|
typedef void (*PG_init_t) (void);
|
|
|
|
|
|
|
|
|
|
/* hashtable entry for rendezvous variables */
|
|
|
|
|
typedef struct
|
|
|
|
|
{
|
|
|
|
|
char varName[NAMEDATALEN]; /* hash key (must be first) */
|
|
|
|
|
void *varValue;
|
|
|
|
|
} rendezvousHashEntry;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* List of dynamically loaded files (kept in malloc'd memory).
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
typedef struct df_files
|
|
|
|
|
{
|
|
|
|
|
struct df_files *next; /* List link */
|
|
|
|
|
dev_t device; /* Device file is on */
|
|
|
|
|
#ifndef WIN32 /* ensures we never again depend on this under
|
|
|
|
|
* win32 */
|
|
|
|
|
ino_t inode; /* Inode number of file */
|
|
|
|
|
#endif
|
|
|
|
|
void *handle; /* a handle for pg_dl* functions */
|
Phase 2 of pgindent updates.
Change pg_bsd_indent to follow upstream rules for placement of comments
to the right of code, and remove pgindent hack that caused comments
following #endif to not obey the general rule.
Commit e3860ffa4dd0dad0dd9eea4be9cc1412373a8c89 wasn't actually using
the published version of pg_bsd_indent, but a hacked-up version that
tried to minimize the amount of movement of comments to the right of
code. The situation of interest is where such a comment has to be
moved to the right of its default placement at column 33 because there's
code there. BSD indent has always moved right in units of tab stops
in such cases --- but in the previous incarnation, indent was working
in 8-space tab stops, while now it knows we use 4-space tabs. So the
net result is that in about half the cases, such comments are placed
one tab stop left of before. This is better all around: it leaves
more room on the line for comment text, and it means that in such
cases the comment uniformly starts at the next 4-space tab stop after
the code, rather than sometimes one and sometimes two tabs after.
Also, ensure that comments following #endif are indented the same
as comments following other preprocessor commands such as #else.
That inconsistency turns out to have been self-inflicted damage
from a poorly-thought-through post-indent "fixup" in pgindent.
This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.
Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
8 years ago
|
|
|
char filename[FLEXIBLE_ARRAY_MEMBER]; /* Full pathname of file */
|
|
|
|
|
} DynamicFileList;
|
|
|
|
|
|
|
|
|
|
static DynamicFileList *file_list = NULL;
|
|
|
|
|
static DynamicFileList *file_tail = NULL;
|
|
|
|
|
|
|
|
|
|
/* stat() call under Win32 returns an st_ino field, but it has no meaning */
|
|
|
|
|
#ifndef WIN32
|
|
|
|
|
#define SAME_INODE(A,B) ((A).st_ino == (B).inode && (A).st_dev == (B).device)
|
|
|
|
|
#else
|
|
|
|
|
#define SAME_INODE(A,B) false
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
char *Dynamic_library_path;
|
|
|
|
|
|
|
|
|
|
static void *internal_load_library(const char *libname);
|
|
|
|
|
static void incompatible_module_error(const char *libname,
|
|
|
|
|
const Pg_magic_struct *module_magic_data) pg_attribute_noreturn();
|
|
|
|
|
static char *expand_dynamic_library_name(const char *name);
|
|
|
|
|
static void check_restricted_library_name(const char *name);
|
|
|
|
|
static char *substitute_libpath_macro(const char *name);
|
|
|
|
|
static char *find_in_dynamic_libpath(const char *basename);
|
|
|
|
|
|
|
|
|
|
/* Magic structure that module needs to match to be accepted */
|
|
|
|
|
static const Pg_magic_struct magic_data = PG_MODULE_MAGIC_DATA;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Load the specified dynamic-link library file, and look for a function
|
|
|
|
|
* named funcname in it.
|
|
|
|
|
*
|
|
|
|
|
* If the function is not found, we raise an error if signalNotFound is true,
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
* else return NULL. Note that errors in loading the library
|
|
|
|
|
* will provoke ereport() regardless of signalNotFound.
|
|
|
|
|
*
|
|
|
|
|
* If filehandle is not NULL, then *filehandle will be set to a handle
|
|
|
|
|
* identifying the library file. The filehandle can be used with
|
|
|
|
|
* lookup_external_function to lookup additional functions in the same file
|
|
|
|
|
* at less cost than repeating load_external_function.
|
|
|
|
|
*/
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
void *
|
|
|
|
|
load_external_function(const char *filename, const char *funcname,
|
|
|
|
|
bool signalNotFound, void **filehandle)
|
|
|
|
|
{
|
|
|
|
|
char *fullname;
|
|
|
|
|
void *lib_handle;
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
void *retval;
|
|
|
|
|
|
|
|
|
|
/* Expand the possibly-abbreviated filename to an exact path name */
|
|
|
|
|
fullname = expand_dynamic_library_name(filename);
|
|
|
|
|
|
|
|
|
|
/* Load the shared library, unless we already did */
|
|
|
|
|
lib_handle = internal_load_library(fullname);
|
|
|
|
|
|
|
|
|
|
/* Return handle if caller wants it */
|
|
|
|
|
if (filehandle)
|
|
|
|
|
*filehandle = lib_handle;
|
|
|
|
|
|
|
|
|
|
/* Look up the function within the library. */
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
retval = dlsym(lib_handle, funcname);
|
|
|
|
|
|
|
|
|
|
if (retval == NULL && signalNotFound)
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode(ERRCODE_UNDEFINED_FUNCTION),
|
|
|
|
|
errmsg("could not find function \"%s\" in file \"%s\"",
|
|
|
|
|
funcname, fullname)));
|
|
|
|
|
|
|
|
|
|
pfree(fullname);
|
|
|
|
|
return retval;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* This function loads a shlib file without looking up any particular
|
|
|
|
|
* function in it. If the same shlib has previously been loaded,
|
|
|
|
|
* unload and reload it.
|
|
|
|
|
*
|
|
|
|
|
* When 'restricted' is true, only libraries in the presumed-secure
|
|
|
|
|
* directory $libdir/plugins may be referenced.
|
|
|
|
|
*/
|
|
|
|
|
void
|
|
|
|
|
load_file(const char *filename, bool restricted)
|
|
|
|
|
{
|
|
|
|
|
char *fullname;
|
|
|
|
|
|
|
|
|
|
/* Apply security restriction if requested */
|
|
|
|
|
if (restricted)
|
|
|
|
|
check_restricted_library_name(filename);
|
|
|
|
|
|
|
|
|
|
/* Expand the possibly-abbreviated filename to an exact path name */
|
|
|
|
|
fullname = expand_dynamic_library_name(filename);
|
|
|
|
|
|
|
|
|
|
/* Load the shared library */
|
|
|
|
|
(void) internal_load_library(fullname);
|
|
|
|
|
|
|
|
|
|
pfree(fullname);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Lookup a function whose library file is already loaded.
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
* Return NULL if not found.
|
|
|
|
|
*/
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
void *
|
|
|
|
|
lookup_external_function(void *filehandle, const char *funcname)
|
|
|
|
|
{
|
Fix -Wcast-function-type warnings
Three groups of issues needed to be addressed:
load_external_function() and related functions returned PGFunction,
even though not necessarily all callers are looking for a function of
type PGFunction. Since these functions are really just wrappers
around dlsym(), change to return void * just like dlsym().
In dynahash.c, we are using strlcpy() where a function with a
signature like memcpy() is expected. This should be safe, as the new
comment there explains, but the cast needs to be augmented to avoid
the warning.
In PL/Python, methods all need to be cast to PyCFunction, per Python
API, but this now runs afoul of these warnings. (This issue also
exists in core CPython.)
To fix the second and third case, we add a new type pg_funcptr_t that
is defined specifically so that gcc accepts it as a special function
pointer that can be cast to any other function pointer without the
warning.
Also add -Wcast-function-type to the standard warning flags, subject
to configure check.
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://www.postgresql.org/message-id/flat/1e97628e-6447-b4fd-e230-d109cec2d584%402ndquadrant.com
5 years ago
|
|
|
return dlsym(filehandle, funcname);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Load the specified dynamic-link library file, unless it already is
|
|
|
|
|
* loaded. Return the pg_dl* handle for the file.
|
|
|
|
|
*
|
|
|
|
|
* Note: libname is expected to be an exact name for the library file.
|
|
|
|
|
*
|
|
|
|
|
* NB: There is presently no way to unload a dynamically loaded file. We might
|
|
|
|
|
* add one someday if we can convince ourselves we have safe protocols for un-
|
|
|
|
|
* hooking from hook function pointers, releasing custom GUC variables, and
|
|
|
|
|
* perhaps other things that are definitely unsafe currently.
|
|
|
|
|
*/
|
|
|
|
|
static void *
|
|
|
|
|
internal_load_library(const char *libname)
|
|
|
|
|
{
|
|
|
|
|
DynamicFileList *file_scanner;
|
|
|
|
|
PGModuleMagicFunction magic_func;
|
|
|
|
|
char *load_error;
|
|
|
|
|
struct stat stat_buf;
|
|
|
|
|
PG_init_t PG_init;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Scan the list of loaded FILES to see if the file has been loaded.
|
|
|
|
|
*/
|
|
|
|
|
for (file_scanner = file_list;
|
|
|
|
|
file_scanner != NULL &&
|
|
|
|
|
strcmp(libname, file_scanner->filename) != 0;
|
|
|
|
|
file_scanner = file_scanner->next)
|
|
|
|
|
;
|
|
|
|
|
|
|
|
|
|
if (file_scanner == NULL)
|
|
|
|
|
{
|
|
|
|
|
/*
|
|
|
|
|
* Check for same files - different paths (ie, symlink or link)
|
|
|
|
|
*/
|
|
|
|
|
if (stat(libname, &stat_buf) == -1)
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode_for_file_access(),
|
|
|
|
|
errmsg("could not access file \"%s\": %m",
|
|
|
|
|
libname)));
|
|
|
|
|
|
|
|
|
|
for (file_scanner = file_list;
|
|
|
|
|
file_scanner != NULL &&
|
|
|
|
|
!SAME_INODE(stat_buf, *file_scanner);
|
|
|
|
|
file_scanner = file_scanner->next)
|
|
|
|
|
;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (file_scanner == NULL)
|
|
|
|
|
{
|
|
|
|
|
/*
|
|
|
|
|
* File not loaded yet.
|
|
|
|
|
*/
|
|
|
|
|
file_scanner = (DynamicFileList *)
|
|
|
|
|
malloc(offsetof(DynamicFileList, filename) + strlen(libname) + 1);
|
|
|
|
|
if (file_scanner == NULL)
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode(ERRCODE_OUT_OF_MEMORY),
|
|
|
|
|
errmsg("out of memory")));
|
|
|
|
|
|
|
|
|
|
MemSet(file_scanner, 0, offsetof(DynamicFileList, filename));
|
|
|
|
|
strcpy(file_scanner->filename, libname);
|
|
|
|
|
file_scanner->device = stat_buf.st_dev;
|
|
|
|
|
#ifndef WIN32
|
|
|
|
|
file_scanner->inode = stat_buf.st_ino;
|
|
|
|
|
#endif
|
|
|
|
|
file_scanner->next = NULL;
|
|
|
|
|
|
|
|
|
|
file_scanner->handle = dlopen(file_scanner->filename, RTLD_NOW | RTLD_GLOBAL);
|
|
|
|
|
if (file_scanner->handle == NULL)
|
|
|
|
|
{
|
|
|
|
|
load_error = dlerror();
|
|
|
|
|
free(file_scanner);
|
|
|
|
|
/* errcode_for_file_access might not be appropriate here? */
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode_for_file_access(),
|
|
|
|
|
errmsg("could not load library \"%s\": %s",
|
|
|
|
|
libname, load_error)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Check the magic function to determine compatibility */
|
|
|
|
|
magic_func = (PGModuleMagicFunction)
|
|
|
|
|
dlsym(file_scanner->handle, PG_MAGIC_FUNCTION_NAME_STRING);
|
|
|
|
|
if (magic_func)
|
|
|
|
|
{
|
|
|
|
|
const Pg_magic_struct *magic_data_ptr = (*magic_func) ();
|
|
|
|
|
|
|
|
|
|
if (magic_data_ptr->len != magic_data.len ||
|
|
|
|
|
memcmp(magic_data_ptr, &magic_data, magic_data.len) != 0)
|
|
|
|
|
{
|
|
|
|
|
/* copy data block before unlinking library */
|
|
|
|
|
Pg_magic_struct module_magic_data = *magic_data_ptr;
|
|
|
|
|
|
|
|
|
|
/* try to close library */
|
|
|
|
|
dlclose(file_scanner->handle);
|
|
|
|
|
free(file_scanner);
|
|
|
|
|
|
|
|
|
|
/* issue suitable complaint */
|
|
|
|
|
incompatible_module_error(libname, &module_magic_data);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* try to close library */
|
|
|
|
|
dlclose(file_scanner->handle);
|
|
|
|
|
free(file_scanner);
|
|
|
|
|
/* complain */
|
|
|
|
|
ereport(ERROR,
|
Phase 3 of pgindent updates.
Don't move parenthesized lines to the left, even if that means they
flow past the right margin.
By default, BSD indent lines up statement continuation lines that are
within parentheses so that they start just to the right of the preceding
left parenthesis. However, traditionally, if that resulted in the
continuation line extending to the right of the desired right margin,
then indent would push it left just far enough to not overrun the margin,
if it could do so without making the continuation line start to the left of
the current statement indent. That makes for a weird mix of indentations
unless one has been completely rigid about never violating the 80-column
limit.
This behavior has been pretty universally panned by Postgres developers.
Hence, disable it with indent's new -lpl switch, so that parenthesized
lines are always lined up with the preceding left paren.
This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.
Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
8 years ago
|
|
|
(errmsg("incompatible library \"%s\": missing magic block",
|
|
|
|
|
libname),
|
|
|
|
|
errhint("Extension libraries are required to use the PG_MODULE_MAGIC macro.")));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If the library has a _PG_init() function, call it.
|
|
|
|
|
*/
|
|
|
|
|
PG_init = (PG_init_t) dlsym(file_scanner->handle, "_PG_init");
|
|
|
|
|
if (PG_init)
|
|
|
|
|
(*PG_init) ();
|
|
|
|
|
|
|
|
|
|
/* OK to link it into list */
|
|
|
|
|
if (file_list == NULL)
|
|
|
|
|
file_list = file_scanner;
|
|
|
|
|
else
|
|
|
|
|
file_tail->next = file_scanner;
|
|
|
|
|
file_tail = file_scanner;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return file_scanner->handle;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Report a suitable error for an incompatible magic block.
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
incompatible_module_error(const char *libname,
|
|
|
|
|
const Pg_magic_struct *module_magic_data)
|
|
|
|
|
{
|
|
|
|
|
StringInfoData details;
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If the version doesn't match, just report that, because the rest of the
|
|
|
|
|
* block might not even have the fields we expect.
|
|
|
|
|
*/
|
|
|
|
|
if (magic_data.version != module_magic_data->version)
|
Fix assorted places in psql to print version numbers >= 10 in new style.
This is somewhat cosmetic, since as long as you know what you are looking
at, "10.0" is a serviceable substitute for "10". But there is a potential
for confusion between version numbers with minor numbers and those without
--- we don't want people asking "why is psql saying 10.0 when my server is
10.2". Therefore, back-patch as far as practical, which turns out to be
9.3. I could have redone the patch to use fprintf(stderr) in place of
psql_error(), but it seems more work than is warranted for branches that
will be EOL or nearly so by the time v10 comes out.
Although only psql seems to contain any code that needs this, I chose
to put the support function into fe_utils, since it seems likely we'll
need it in other client programs in future. (In 9.3-9.5, use dumputils.c,
the predecessor of fe_utils/string_utils.c.)
In HEAD, also fix the backend code that whines about loadable-library
version mismatch. I don't see much need to back-patch that.
9 years ago
|
|
|
{
|
|
|
|
|
char library_version[32];
|
|
|
|
|
|
|
|
|
|
if (module_magic_data->version >= 1000)
|
|
|
|
|
snprintf(library_version, sizeof(library_version), "%d",
|
|
|
|
|
module_magic_data->version / 100);
|
|
|
|
|
else
|
|
|
|
|
snprintf(library_version, sizeof(library_version), "%d.%d",
|
|
|
|
|
module_magic_data->version / 100,
|
|
|
|
|
module_magic_data->version % 100);
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errmsg("incompatible library \"%s\": version mismatch",
|
|
|
|
|
libname),
|
Fix assorted places in psql to print version numbers >= 10 in new style.
This is somewhat cosmetic, since as long as you know what you are looking
at, "10.0" is a serviceable substitute for "10". But there is a potential
for confusion between version numbers with minor numbers and those without
--- we don't want people asking "why is psql saying 10.0 when my server is
10.2". Therefore, back-patch as far as practical, which turns out to be
9.3. I could have redone the patch to use fprintf(stderr) in place of
psql_error(), but it seems more work than is warranted for branches that
will be EOL or nearly so by the time v10 comes out.
Although only psql seems to contain any code that needs this, I chose
to put the support function into fe_utils, since it seems likely we'll
need it in other client programs in future. (In 9.3-9.5, use dumputils.c,
the predecessor of fe_utils/string_utils.c.)
In HEAD, also fix the backend code that whines about loadable-library
version mismatch. I don't see much need to back-patch that.
9 years ago
|
|
|
errdetail("Server is version %d, library is version %s.",
|
|
|
|
|
magic_data.version / 100, library_version)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Similarly, if the ABI extra field doesn't match, error out. Other
|
|
|
|
|
* fields below might also mismatch, but that isn't useful information if
|
|
|
|
|
* you're using the wrong product altogether.
|
|
|
|
|
*/
|
|
|
|
|
if (strcmp(module_magic_data->abi_extra, magic_data.abi_extra) != 0)
|
|
|
|
|
{
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errmsg("incompatible library \"%s\": ABI mismatch",
|
|
|
|
|
libname),
|
|
|
|
|
errdetail("Server has ABI \"%s\", library has \"%s\".",
|
|
|
|
|
magic_data.abi_extra,
|
|
|
|
|
module_magic_data->abi_extra)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Otherwise, spell out which fields don't agree.
|
|
|
|
|
*
|
|
|
|
|
* XXX this code has to be adjusted any time the set of fields in a magic
|
|
|
|
|
* block change!
|
|
|
|
|
*/
|
|
|
|
|
initStringInfo(&details);
|
|
|
|
|
|
|
|
|
|
if (module_magic_data->funcmaxargs != magic_data.funcmaxargs)
|
|
|
|
|
{
|
|
|
|
|
if (details.len)
|
|
|
|
|
appendStringInfoChar(&details, '\n');
|
|
|
|
|
appendStringInfo(&details,
|
|
|
|
|
/* translator: %s is a variable name and %d its values */
|
|
|
|
|
_("Server has %s = %d, library has %d."),
|
|
|
|
|
"FUNC_MAX_ARGS", magic_data.funcmaxargs,
|
|
|
|
|
module_magic_data->funcmaxargs);
|
|
|
|
|
}
|
|
|
|
|
if (module_magic_data->indexmaxkeys != magic_data.indexmaxkeys)
|
|
|
|
|
{
|
|
|
|
|
if (details.len)
|
|
|
|
|
appendStringInfoChar(&details, '\n');
|
|
|
|
|
appendStringInfo(&details,
|
|
|
|
|
/* translator: %s is a variable name and %d its values */
|
|
|
|
|
_("Server has %s = %d, library has %d."),
|
|
|
|
|
"INDEX_MAX_KEYS", magic_data.indexmaxkeys,
|
|
|
|
|
module_magic_data->indexmaxkeys);
|
|
|
|
|
}
|
|
|
|
|
if (module_magic_data->namedatalen != magic_data.namedatalen)
|
|
|
|
|
{
|
|
|
|
|
if (details.len)
|
|
|
|
|
appendStringInfoChar(&details, '\n');
|
|
|
|
|
appendStringInfo(&details,
|
|
|
|
|
/* translator: %s is a variable name and %d its values */
|
|
|
|
|
_("Server has %s = %d, library has %d."),
|
|
|
|
|
"NAMEDATALEN", magic_data.namedatalen,
|
|
|
|
|
module_magic_data->namedatalen);
|
|
|
|
|
}
|
|
|
|
|
if (module_magic_data->float8byval != magic_data.float8byval)
|
|
|
|
|
{
|
|
|
|
|
if (details.len)
|
|
|
|
|
appendStringInfoChar(&details, '\n');
|
|
|
|
|
appendStringInfo(&details,
|
|
|
|
|
/* translator: %s is a variable name and %d its values */
|
|
|
|
|
_("Server has %s = %s, library has %s."),
|
|
|
|
|
"FLOAT8PASSBYVAL", magic_data.float8byval ? "true" : "false",
|
|
|
|
|
module_magic_data->float8byval ? "true" : "false");
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (details.len == 0)
|
|
|
|
|
appendStringInfoString(&details,
|
Phase 3 of pgindent updates.
Don't move parenthesized lines to the left, even if that means they
flow past the right margin.
By default, BSD indent lines up statement continuation lines that are
within parentheses so that they start just to the right of the preceding
left parenthesis. However, traditionally, if that resulted in the
continuation line extending to the right of the desired right margin,
then indent would push it left just far enough to not overrun the margin,
if it could do so without making the continuation line start to the left of
the current statement indent. That makes for a weird mix of indentations
unless one has been completely rigid about never violating the 80-column
limit.
This behavior has been pretty universally panned by Postgres developers.
Hence, disable it with indent's new -lpl switch, so that parenthesized
lines are always lined up with the preceding left paren.
This patch is much less interesting than the first round of indent
changes, but also bulkier, so I thought it best to separate the effects.
Discussion: https://postgr.es/m/E1dAmxK-0006EE-1r@gemulon.postgresql.org
Discussion: https://postgr.es/m/30527.1495162840@sss.pgh.pa.us
8 years ago
|
|
|
_("Magic block has unexpected length or padding difference."));
|
|
|
|
|
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errmsg("incompatible library \"%s\": magic block mismatch",
|
|
|
|
|
libname),
|
|
|
|
|
errdetail_internal("%s", details.data)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If name contains a slash, check if the file exists, if so return
|
|
|
|
|
* the name. Else (no slash) try to expand using search path (see
|
|
|
|
|
* find_in_dynamic_libpath below); if that works, return the fully
|
|
|
|
|
* expanded file name. If the previous failed, append DLSUFFIX and
|
|
|
|
|
* try again. If all fails, just return the original name.
|
|
|
|
|
*
|
|
|
|
|
* The result will always be freshly palloc'd.
|
|
|
|
|
*/
|
|
|
|
|
static char *
|
|
|
|
|
expand_dynamic_library_name(const char *name)
|
|
|
|
|
{
|
|
|
|
|
bool have_slash;
|
|
|
|
|
char *new;
|
|
|
|
|
char *full;
|
|
|
|
|
|
|
|
|
|
Assert(name);
|
|
|
|
|
|
|
|
|
|
have_slash = (first_dir_separator(name) != NULL);
|
|
|
|
|
|
|
|
|
|
if (!have_slash)
|
|
|
|
|
{
|
|
|
|
|
full = find_in_dynamic_libpath(name);
|
|
|
|
|
if (full)
|
|
|
|
|
return full;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
full = substitute_libpath_macro(name);
|
|
|
|
|
if (pg_file_exists(full))
|
|
|
|
|
return full;
|
|
|
|
|
pfree(full);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
new = psprintf("%s%s", name, DLSUFFIX);
|
|
|
|
|
|
|
|
|
|
if (!have_slash)
|
|
|
|
|
{
|
|
|
|
|
full = find_in_dynamic_libpath(new);
|
|
|
|
|
pfree(new);
|
|
|
|
|
if (full)
|
|
|
|
|
return full;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
full = substitute_libpath_macro(new);
|
|
|
|
|
pfree(new);
|
|
|
|
|
if (pg_file_exists(full))
|
|
|
|
|
return full;
|
|
|
|
|
pfree(full);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* If we can't find the file, just return the string as-is. The ensuing
|
|
|
|
|
* load attempt will fail and report a suitable message.
|
|
|
|
|
*/
|
|
|
|
|
return pstrdup(name);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Check a restricted library name. It must begin with "$libdir/plugins/"
|
|
|
|
|
* and there must not be any directory separators after that (this is
|
|
|
|
|
* sufficient to prevent ".." style attacks).
|
|
|
|
|
*/
|
|
|
|
|
static void
|
|
|
|
|
check_restricted_library_name(const char *name)
|
|
|
|
|
{
|
|
|
|
|
if (strncmp(name, "$libdir/plugins/", 16) != 0 ||
|
|
|
|
|
first_dir_separator(name + 16) != NULL)
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
|
|
|
|
|
errmsg("access to library \"%s\" is not allowed",
|
|
|
|
|
name)));
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Substitute for any macros appearing in the given string.
|
|
|
|
|
* Result is always freshly palloc'd.
|
|
|
|
|
*/
|
|
|
|
|
static char *
|
|
|
|
|
substitute_libpath_macro(const char *name)
|
|
|
|
|
{
|
|
|
|
|
const char *sep_ptr;
|
|
|
|
|
|
|
|
|
|
Assert(name != NULL);
|
|
|
|
|
|
|
|
|
|
/* Currently, we only recognize $libdir at the start of the string */
|
|
|
|
|
if (name[0] != '$')
|
|
|
|
|
return pstrdup(name);
|
|
|
|
|
|
|
|
|
|
if ((sep_ptr = first_dir_separator(name)) == NULL)
|
|
|
|
|
sep_ptr = name + strlen(name);
|
|
|
|
|
|
|
|
|
|
if (strlen("$libdir") != sep_ptr - name ||
|
|
|
|
|
strncmp(name, "$libdir", strlen("$libdir")) != 0)
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode(ERRCODE_INVALID_NAME),
|
|
|
|
|
errmsg("invalid macro name in dynamic library path: %s",
|
|
|
|
|
name)));
|
|
|
|
|
|
|
|
|
|
return psprintf("%s%s", pkglib_path, sep_ptr);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Search for a file called 'basename' in the colon-separated search
|
|
|
|
|
* path Dynamic_library_path. If the file is found, the full file name
|
|
|
|
|
* is returned in freshly palloc'd memory. If the file is not found,
|
|
|
|
|
* return NULL.
|
|
|
|
|
*/
|
|
|
|
|
static char *
|
|
|
|
|
find_in_dynamic_libpath(const char *basename)
|
|
|
|
|
{
|
|
|
|
|
const char *p;
|
|
|
|
|
size_t baselen;
|
|
|
|
|
|
|
|
|
|
Assert(basename != NULL);
|
|
|
|
|
Assert(first_dir_separator(basename) == NULL);
|
|
|
|
|
Assert(Dynamic_library_path != NULL);
|
|
|
|
|
|
|
|
|
|
p = Dynamic_library_path;
|
|
|
|
|
if (strlen(p) == 0)
|
|
|
|
|
return NULL;
|
|
|
|
|
|
|
|
|
|
baselen = strlen(basename);
|
|
|
|
|
|
|
|
|
|
for (;;)
|
|
|
|
|
{
|
|
|
|
|
size_t len;
|
|
|
|
|
char *piece;
|
|
|
|
|
char *mangled;
|
|
|
|
|
char *full;
|
|
|
|
|
|
|
|
|
|
piece = first_path_var_separator(p);
|
|
|
|
|
if (piece == p)
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode(ERRCODE_INVALID_NAME),
|
|
|
|
|
errmsg("zero-length component in parameter \"dynamic_library_path\"")));
|
|
|
|
|
|
|
|
|
|
if (piece == NULL)
|
|
|
|
|
len = strlen(p);
|
|
|
|
|
else
|
|
|
|
|
len = piece - p;
|
|
|
|
|
|
|
|
|
|
piece = palloc(len + 1);
|
|
|
|
|
strlcpy(piece, p, len + 1);
|
|
|
|
|
|
|
|
|
|
mangled = substitute_libpath_macro(piece);
|
|
|
|
|
pfree(piece);
|
|
|
|
|
|
|
|
|
|
canonicalize_path(mangled);
|
|
|
|
|
|
|
|
|
|
/* only absolute paths */
|
|
|
|
|
if (!is_absolute_path(mangled))
|
|
|
|
|
ereport(ERROR,
|
|
|
|
|
(errcode(ERRCODE_INVALID_NAME),
|
|
|
|
|
errmsg("component in parameter \"dynamic_library_path\" is not an absolute path")));
|
|
|
|
|
|
|
|
|
|
full = palloc(strlen(mangled) + 1 + baselen + 1);
|
|
|
|
|
sprintf(full, "%s/%s", mangled, basename);
|
|
|
|
|
pfree(mangled);
|
|
|
|
|
|
|
|
|
|
elog(DEBUG3, "find_in_dynamic_libpath: trying \"%s\"", full);
|
|
|
|
|
|
|
|
|
|
if (pg_file_exists(full))
|
|
|
|
|
return full;
|
|
|
|
|
|
|
|
|
|
pfree(full);
|
|
|
|
|
|
|
|
|
|
if (p[len] == '\0')
|
|
|
|
|
break;
|
|
|
|
|
else
|
|
|
|
|
p += len + 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Find (or create) a rendezvous variable that one dynamically
|
|
|
|
|
* loaded library can use to meet up with another.
|
|
|
|
|
*
|
|
|
|
|
* On the first call of this function for a particular varName,
|
|
|
|
|
* a "rendezvous variable" is created with the given name.
|
|
|
|
|
* The value of the variable is a void pointer (initially set to NULL).
|
|
|
|
|
* Subsequent calls with the same varName just return the address of
|
|
|
|
|
* the existing variable. Once created, a rendezvous variable lasts
|
|
|
|
|
* for the life of the process.
|
|
|
|
|
*
|
|
|
|
|
* Dynamically loaded libraries can use rendezvous variables
|
|
|
|
|
* to find each other and share information: they just need to agree
|
|
|
|
|
* on the variable name and the data it will point to.
|
|
|
|
|
*/
|
|
|
|
|
void **
|
|
|
|
|
find_rendezvous_variable(const char *varName)
|
|
|
|
|
{
|
|
|
|
|
static HTAB *rendezvousHash = NULL;
|
|
|
|
|
|
|
|
|
|
rendezvousHashEntry *hentry;
|
|
|
|
|
bool found;
|
|
|
|
|
|
|
|
|
|
/* Create a hashtable if we haven't already done so in this process */
|
|
|
|
|
if (rendezvousHash == NULL)
|
|
|
|
|
{
|
|
|
|
|
HASHCTL ctl;
|
|
|
|
|
|
|
|
|
|
ctl.keysize = NAMEDATALEN;
|
|
|
|
|
ctl.entrysize = sizeof(rendezvousHashEntry);
|
|
|
|
|
rendezvousHash = hash_create("Rendezvous variable hash",
|
|
|
|
|
16,
|
|
|
|
|
&ctl,
|
Improve hash_create()'s API for some added robustness.
Invent a new flag bit HASH_STRINGS to specify C-string hashing, which
was formerly the default; and add assertions insisting that exactly
one of the bits HASH_STRINGS, HASH_BLOBS, and HASH_FUNCTION be set.
This is in hopes of preventing recurrences of the type of oversight
fixed in commit a1b8aa1e4 (i.e., mistakenly omitting HASH_BLOBS).
Also, when HASH_STRINGS is specified, insist that the keysize be
more than 8 bytes. This is a heuristic, but it should catch
accidental use of HASH_STRINGS for integer or pointer keys.
(Nearly all existing use-cases set the keysize to NAMEDATALEN or
more, so there's little reason to think this restriction should
be problematic.)
Tweak hash_create() to insist that the HASH_ELEM flag be set, and
remove the defaults it had for keysize and entrysize. Since those
defaults were undocumented and basically useless, no callers
omitted HASH_ELEM anyway.
Also, remove memset's zeroing the HASHCTL parameter struct from
those callers that had one. This has never been really necessary,
and while it wasn't a bad coding convention it was confusing that
some callers did it and some did not. We might as well save a few
cycles by standardizing on "not".
Also improve the documentation for hash_create().
In passing, improve reinit.c's usage of a hash table by storing
the key as a binary Oid rather than a string; and, since that's
a temporary hash table, allocate it in CurrentMemoryContext for
neatness.
Discussion: https://postgr.es/m/590625.1607878171@sss.pgh.pa.us
5 years ago
|
|
|
HASH_ELEM | HASH_STRINGS);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Find or create the hashtable entry for this varName */
|
|
|
|
|
hentry = (rendezvousHashEntry *) hash_search(rendezvousHash,
|
|
|
|
|
varName,
|
|
|
|
|
HASH_ENTER,
|
|
|
|
|
&found);
|
|
|
|
|
|
|
|
|
|
/* Initialize to NULL if first time */
|
|
|
|
|
if (!found)
|
|
|
|
|
hentry->varValue = NULL;
|
|
|
|
|
|
|
|
|
|
return &hentry->varValue;
|
|
|
|
|
}
|
Create an infrastructure for parallel computation in PostgreSQL.
This does four basic things. First, it provides convenience routines
to coordinate the startup and shutdown of parallel workers. Second,
it synchronizes various pieces of state (e.g. GUCs, combo CID
mappings, transaction snapshot) from the parallel group leader to the
worker processes. Third, it prohibits various operations that would
result in unsafe changes to that state while parallelism is active.
Finally, it propagates events that would result in an ErrorResponse,
NoticeResponse, or NotifyResponse message being sent to the client
from the parallel workers back to the master, from which they can then
be sent on to the client.
Robert Haas, Amit Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke.
Suggestions and review from Andres Freund, Heikki Linnakangas, Noah
Misch, Simon Riggs, Euler Taveira, and Jim Nasby.
11 years ago
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Estimate the amount of space needed to serialize the list of libraries
|
|
|
|
|
* we have loaded.
|
|
|
|
|
*/
|
|
|
|
|
Size
|
|
|
|
|
EstimateLibraryStateSpace(void)
|
|
|
|
|
{
|
|
|
|
|
DynamicFileList *file_scanner;
|
|
|
|
|
Size size = 1;
|
Create an infrastructure for parallel computation in PostgreSQL.
This does four basic things. First, it provides convenience routines
to coordinate the startup and shutdown of parallel workers. Second,
it synchronizes various pieces of state (e.g. GUCs, combo CID
mappings, transaction snapshot) from the parallel group leader to the
worker processes. Third, it prohibits various operations that would
result in unsafe changes to that state while parallelism is active.
Finally, it propagates events that would result in an ErrorResponse,
NoticeResponse, or NotifyResponse message being sent to the client
from the parallel workers back to the master, from which they can then
be sent on to the client.
Robert Haas, Amit Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke.
Suggestions and review from Andres Freund, Heikki Linnakangas, Noah
Misch, Simon Riggs, Euler Taveira, and Jim Nasby.
11 years ago
|
|
|
|
|
|
|
|
for (file_scanner = file_list;
|
|
|
|
|
file_scanner != NULL;
|
|
|
|
|
file_scanner = file_scanner->next)
|
|
|
|
|
size = add_size(size, strlen(file_scanner->filename) + 1);
|
|
|
|
|
|
|
|
|
|
return size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Serialize the list of libraries we have loaded to a chunk of memory.
|
|
|
|
|
*/
|
|
|
|
|
void
|
|
|
|
|
SerializeLibraryState(Size maxsize, char *start_address)
|
|
|
|
|
{
|
|
|
|
|
DynamicFileList *file_scanner;
|
|
|
|
|
|
|
|
|
|
for (file_scanner = file_list;
|
|
|
|
|
file_scanner != NULL;
|
|
|
|
|
file_scanner = file_scanner->next)
|
|
|
|
|
{
|
|
|
|
|
Size len;
|
Create an infrastructure for parallel computation in PostgreSQL.
This does four basic things. First, it provides convenience routines
to coordinate the startup and shutdown of parallel workers. Second,
it synchronizes various pieces of state (e.g. GUCs, combo CID
mappings, transaction snapshot) from the parallel group leader to the
worker processes. Third, it prohibits various operations that would
result in unsafe changes to that state while parallelism is active.
Finally, it propagates events that would result in an ErrorResponse,
NoticeResponse, or NotifyResponse message being sent to the client
from the parallel workers back to the master, from which they can then
be sent on to the client.
Robert Haas, Amit Kapila, Noah Misch, Rushabh Lathia, Jeevan Chalke.
Suggestions and review from Andres Freund, Heikki Linnakangas, Noah
Misch, Simon Riggs, Euler Taveira, and Jim Nasby.
11 years ago
|
|
|
|
|
|
|
|
len = strlcpy(start_address, file_scanner->filename, maxsize) + 1;
|
|
|
|
|
Assert(len < maxsize);
|
|
|
|
|
maxsize -= len;
|
|
|
|
|
start_address += len;
|
|
|
|
|
}
|
|
|
|
|
start_address[0] = '\0';
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* Load every library the serializing backend had loaded.
|
|
|
|
|
*/
|
|
|
|
|
void
|
|
|
|
|
RestoreLibraryState(char *start_address)
|
|
|
|
|
{
|
|
|
|
|
while (*start_address != '\0')
|
|
|
|
|
{
|
|
|
|
|
internal_load_library(start_address);
|
|
|
|
|
start_address += strlen(start_address) + 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
