Changeset 914 for trunk/xcache.c

Timestamp:

06/21/2012 11:44:18 AM (11 months ago)

Author:

moo

Message:

crash dump support for windows

Files:

• trunk/xcache.c (modified) (7 diffs)

trunk/xcache.c

@@ -3336 +3336 @@
 /* }}} */
 
+#ifdef ZEND_WIN32
+#include "dbghelp.h"
+typedef BOOL (WINAPI *MINIDUMPWRITEDUMP)(HANDLE hProcess, DWORD dwPid, HANDLE hFile, MINIDUMP_TYPE DumpType,
+        CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
+        CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
+        CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam
+        );
+
+static PTOP_LEVEL_EXCEPTION_FILTER oldFilter;
+static HMODULE dbghelpModule = NULL;
+static char crash_dumpPath[_MAX_PATH];
+static MINIDUMPWRITEDUMP dbghelp_MiniDumpWriteDump;
+
+static LONG WINAPI miniDumperFilter(struct _EXCEPTION_POINTERS *pExceptionInfo) /* {{{ */
+{
+    HANDLE fileHandle;
+
+    SetUnhandledExceptionFilter(oldFilter);
+
+    /* create the file */
+    fileHandle = CreateFile(crash_dumpPath, GENERIC_WRITE, FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+
+    if (fileHandle != INVALID_HANDLE_VALUE) {
+        MINIDUMP_EXCEPTION_INFORMATION exceptionInformation;
+        BOOL ok;
+
+        exceptionInformation.ThreadId = GetCurrentThreadId();
+        exceptionInformation.ExceptionPointers = pExceptionInfo;
+        exceptionInformation.ClientPointers = FALSE;
+
+        /* write the dump */
+        ok = dbghelp_MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(), fileHandle, MiniDumpNormal, &exceptionInformation, NULL, NULL);
+        CloseHandle(fileHandle);
+        if (ok) {
+            zend_error(E_ERROR, "Saved dump file to '%s'", crash_dumpPath);
+            return EXCEPTION_EXECUTE_HANDLER;
+        }
+        else {
+            zend_error(E_ERROR, "Failed to save dump file to '%s' (error %d)", crash_dumpPath, GetLastError());
+        }
+    }
+    else {
+        zend_error(E_ERROR, "Failed to create dump file '%s' (error %d)", crash_dumpPath, GetLastError());
+    }
+
+    return EXCEPTION_CONTINUE_SEARCH;
+}
+/* }}} */
+
+static void xcache_restore_crash_handler() /* {{{ */
+{
+    if (oldFilter) {
+        SetUnhandledExceptionFilter(oldFilter);
+        oldFilter = NULL;
+    }
+}
+/* }}} */
+static void xcache_init_crash_handler() /* {{{ */
+{
+    /* firstly see if dbghelp.dll is around and has the function we need
+       look next to the EXE first, as the one in System32 might be old
+       (e.g. Windows 2000) */
+    char dbghelpPath[_MAX_PATH];
+
+    if (GetModuleFileName(NULL, dbghelpPath, _MAX_PATH)) {
+        char *slash = strchr(dbghelpPath, '\\');
+        if (slash) {
+            strcpy(slash + 1, "DBGHELP.DLL");
+            dbghelpModule = LoadLibrary(dbghelpPath);
+        }
+    }
+
+    if (!dbghelpModule) {
+        /* load any version we can */
+        dbghelpModule = LoadLibrary("DBGHELP.DLL");
+        if (!dbghelpModule) {
+            zend_error(E_ERROR, "Unable to enable crash dump saver: %s", "DBGHELP.DLL not found");
+            return;
+        }
+    }
+
+    dbghelp_MiniDumpWriteDump = (MINIDUMPWRITEDUMP)GetProcAddress(dbghelpModule, "MiniDumpWriteDump");
+    if (dbghelp_MiniDumpWriteDump) {
+        zend_error(E_ERROR, "Unable to enable crash dump saver: %s", "DBGHELP.DLL too old");
+        return;
+    }
+
+    /* work out a good place for the dump file */
+    {
+        char tmpPath[_MAX_PATH];
+        if (!GetTempPath(_MAX_PATH, tmpPath)) {
+            strcpy(tmpPath, "c:\\temp");
+        }
+        sprintf(crash_dumpPath, "%s\\php-%s-xcache-%s-%lu.dmp", PHP_VERSION, XCACHE_VERSION, (unsigned long) GetCurrentProcessId());
+    }
+
+    oldFilter = SetUnhandledExceptionFilter(&miniDumperFilter);
+}
+/* }}} */
+#else
 /* old signal handlers {{{ */
 typedef void (*xc_sighandler_t)(int);
@@ -3343 +3443 @@
 /* }}} */
 static void xcache_signal_handler(int sig);
-static void xcache_restore_signal_handler() /* {{{ */
+static void xcache_restore_crash_handler() /* {{{ */
 {
 #define FOREACH_SIG(sig) do { \
@@ -3357 +3457 @@
 }
 /* }}} */
-static void xcache_init_signal_handler() /* {{{ */
+static void xcache_init_crash_handler() /* {{{ */
 {
 #define FOREACH_SIG(sig) \
@@ -3367 +3467 @@
 static void xcache_signal_handler(int sig) /* {{{ */
 {
-    xcache_restore_signal_handler();
+    xcache_restore_crash_handler();
     if (xc_coredump_dir && xc_coredump_dir[0]) {
         if (chdir(xc_coredump_dir) != 0) {
@@ -3377 +3477 @@
 }
 /* }}} */
+#endif
 
 /* {{{ PHP_INI */
@@ -3712 +3813 @@
 
     if (xc_coredump_dir && xc_coredump_dir[0]) {
-        xcache_init_signal_handler();
+        xcache_init_crash_handler();
     }
 
@@ -3767 +3868 @@
 
     if (xc_coredump_dir && xc_coredump_dir[0]) {
-        xcache_restore_signal_handler();
+        xcache_restore_crash_handler();
     }
     if (xc_coredump_dir) {