mirror of https://github.com/BOINC/boinc.git
- Client (Windows) change the way core/app shmem segs are created.
Old: get_shmem_seg_name() tries names of the form shm_boinc_N
until it finds one for which creating succeeds.
Then it detaches (deletes) the segment and records the name.
Later, the segment is created again.
This creates a race condition if two core clients
are running on the same host.
It's also kind of silly.
New: get_shmem_seg_name() doesn't detach the segment,
and we dont have to create it again later.
svn path=/trunk/boinc/; revision=15172
This commit is contained in:
David Anderson
parent
b622f64e30
commit
db4164daba
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@ -3839,3 +3839,20 @@ David May 9 2008
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sched/
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sched_send.C
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server_types.h
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David May 11 2008
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- Client (Windows) change the way core/app shmem segs are created.
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Old: get_shmem_seg_name() tries names of the form shm_boinc_N
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until it finds one for which creating succeeds.
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Then it detaches (deletes) the segment and records the name.
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Later, the segment is created again.
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This creates a race condition if two core clients
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are running on the same host.
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It's also kind of silly.
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New: get_shmem_seg_name() doesn't detach the segment,
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and we dont have to create it again later.
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client/
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app_start.C
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lib/
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shmem.C
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@ -79,8 +79,8 @@ using std::vector;
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#ifdef _WIN32
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// Dynamically link to these functions at runtime, otherwise BOINC
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// cannot run on Win98
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// Dynamically link to these functions at runtime;
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// otherwise BOINC cannot run on Win98
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// CreateEnvironmentBlock
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typedef BOOL (WINAPI *tCEB)(LPVOID *lpEnvironment, HANDLE hToken, BOOL bInherit);
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@ -102,28 +102,24 @@ static void debug_print_argv(char** argv) {
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}
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#endif
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// make a unique key for core/app shared memory segment
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// Make a unique key for core/app shared memory segment.
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// Windows: also create and attach to the segment.
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//
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int ACTIVE_TASK::get_shmem_seg_name() {
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#ifdef _WIN32
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int i = 0;
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char szSharedMemoryName[256];
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HANDLE hSharedMemoryHandle = 0;
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int i;
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char seg_name[256];
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HANDLE h = 0;
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for (i=0; i<1024; i++) {
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sprintf(szSharedMemoryName, "%sboinc_%d", SHM_PREFIX, i);
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hSharedMemoryHandle = create_shmem(szSharedMemoryName, 1024, NULL, true);
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if (hSharedMemoryHandle) break;
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sprintf(seg_name, "%sboinc_%d", SHM_PREFIX, i);
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hSharedMemoryHandle = create_shmem(
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seg_name, sizeof(SHARED_MEM), (void**)&app_client_shm.shm, false
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);
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if (h) break;
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}
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if (!hSharedMemoryHandle) {
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return ERR_SHMGET;
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}
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detach_shmem(hSharedMemoryHandle, NULL);
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sprintf(szSharedMemoryName, "boinc_%d", i);
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strcpy(shmem_seg_name, szSharedMemoryName);
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if (!h) return ERR_SHMGET;
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sprintf(shmem_seg_name, "boinc_%d", i);
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#else
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char init_data_path[256];
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#ifndef __EMX__
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@ -492,19 +488,6 @@ int ACTIVE_TASK::start(bool first_time) {
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//
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startup_info.dwFlags = STARTF_FORCEOFFFEEDBACK;
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// create shared mem segment if needed
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//
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if (!app_client_shm.shm) {
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sprintf(buf, "%s%s", SHM_PREFIX, shmem_seg_name);
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shm_handle = create_shmem(buf, sizeof(SHARED_MEM),
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(void **)&app_client_shm.shm, false
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);
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if (shm_handle == NULL) {
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strcpy(buf, "Can't create shared memory");
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retval = ERR_SHMGET;
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goto error;
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}
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}
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app_client_shm.reset_msgs();
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if (config.run_apps_manually) {
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@ -1,6 +1,11 @@
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<?
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$project_news = array(
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array("May 9, 2008",
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"BOINC volunteer Werner Klein is
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<a href=http://www.sternengucker.org/index.php/artikel/interview-seti-ist-heute-bereits-erfolgreich/>interviewed
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in Sternengucker.org</a> (German)."
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),
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array("May 9, 2008",
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"The <a href=http://boincfaq.mundayweb.com/>BOINC FAQ Service</a>
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is now available in Spanish and French
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@ -243,6 +243,7 @@ language("French", array(
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));
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language("German", array(
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//site("http://www.boinc-gemeinschaft.de/", "BOINC Gemeinschaft"),
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site("http://www.gridcommunity.de/index.php", "International Grid Community"),
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site("http://www.swissteam.net/", "SwissTeam.net"),
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site("http://www.unitedmacs.com/", "United Macs"),
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site("http://www.rechenkraft.net/", "Rechenkraft"),
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34
lib/shmem.C
34
lib/shmem.C
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@ -53,6 +53,7 @@ extern "C" int debug_printf(const char *fmt, ...);
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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// MAP_FILE isn't defined on most operating systems, and even then, it
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// is often defined just for the sake of compatibility. On those that
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// don't define it, we will....
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@ -70,7 +71,9 @@ extern "C" int debug_printf(const char *fmt, ...);
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#ifdef _WIN32
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HANDLE create_shmem(LPCTSTR seg_name, int size, void** pp, bool disable_mapview) {
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HANDLE create_shmem(
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LPCTSTR seg_name, int size, void** pp, bool disable_mapview
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) {
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HANDLE hMap = NULL;
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DWORD dwError = 0;
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DWORD dwRes = 0;
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@ -83,9 +86,10 @@ HANDLE create_shmem(LPCTSTR seg_name, int size, void** pp, bool disable_mapview)
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OSVERSIONINFO osvi;
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char global_seg_name[256];
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// Win9X doesn't like any reference to a security descriptor. So if we
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// detect that we are running on the Win9X platform pass a NULL value
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// for it.
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// Win9X doesn't like any reference to a security descriptor.
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// So if we detect that we are running on the Win9X platform pass
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// a NULL value for it.
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//
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osvi.dwOSVersionInfoSize = sizeof(osvi);
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GetVersionEx(&osvi);
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if (osvi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) {
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@ -98,8 +102,8 @@ HANDLE create_shmem(LPCTSTR seg_name, int size, void** pp, bool disable_mapview)
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if(!AllocateAndInitializeSid(&SIDAuthWorld, 1,
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SECURITY_WORLD_RID,
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0, 0, 0, 0, 0, 0, 0,
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&pEveryoneSID))
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{
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&pEveryoneSID)
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) {
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fprintf(stderr, "AllocateAndInitializeSid Error %u\n", GetLastError());
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goto Cleanup;
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}
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@ -124,15 +128,15 @@ HANDLE create_shmem(LPCTSTR seg_name, int size, void** pp, bool disable_mapview)
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// Initialize a security descriptor.
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pSD = (PSECURITY_DESCRIPTOR) LocalAlloc(LPTR, SECURITY_DESCRIPTOR_MIN_LENGTH);
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if (NULL == pSD)
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{
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if (NULL == pSD) {
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fprintf(stderr, "LocalAlloc Error %u\n", GetLastError());
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goto Cleanup;
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}
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if (!InitializeSecurityDescriptor(pSD, SECURITY_DESCRIPTOR_REVISION))
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{
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fprintf(stderr, "InitializeSecurityDescriptor Error %u\n", GetLastError());
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if (!InitializeSecurityDescriptor(pSD, SECURITY_DESCRIPTOR_REVISION)) {
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fprintf(stderr, "InitializeSecurityDescriptor Error %u\n",
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GetLastError()
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);
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goto Cleanup;
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}
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@ -140,9 +144,11 @@ HANDLE create_shmem(LPCTSTR seg_name, int size, void** pp, bool disable_mapview)
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if (!SetSecurityDescriptorDacl(pSD,
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TRUE, // bDaclPresent flag
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pACL,
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FALSE)) // not a default DACL
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{
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fprintf(stderr, "SetSecurityDescriptorDacl Error %u\n", GetLastError());
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FALSE) // not a default DACL
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) {
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fprintf(stderr,
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"SetSecurityDescriptorDacl Error %u\n", GetLastError()
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);
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goto Cleanup;
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}
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