1 files changed, 158 insertions, 0 deletions
diff --git a/common/trace_local_writer.cpp b/common/trace_local_writer.cpp
new file mode 100644
index 0000000..e625f2e
--- /dev/null
+++ b/common/trace_local_writer.cpp
@@ -0,0 +1,158 @@
+/**************************************************************************
+ *
+ * Copyright 2007-2011 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#include <assert.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "os.hpp"
+#include "trace_file.hpp"
+#include "trace_writer.hpp"
+#include "trace_format.hpp"
+
+
+namespace Trace {
+
+
+static void exceptionCallback(void)
+{
+    localWriter.flush();
+}
+
+
+LocalWriter::LocalWriter() :
+    acquired(0)
+{
+    // Install the signal handlers as early as possible, to prevent
+    // interfering with the application's signal handling.
+    OS::SetExceptionCallback(exceptionCallback);
+}
+
+LocalWriter::~LocalWriter()
+{
+    OS::ResetExceptionCallback();
+}
+
+void
+LocalWriter::open(void) {
+
+    static unsigned dwCounter = 0;
+
+    const char *szExtension = "trace";
+    char szFileName[PATH_MAX];
+    const char *lpFileName;
+
+    lpFileName = getenv("TRACE_FILE");
+    if (lpFileName) {
+        strncpy(szFileName, lpFileName, PATH_MAX);
+    }
+    else {
+        char szProcessName[PATH_MAX];
+        char szCurrentDir[PATH_MAX];
+        OS::GetProcessName(szProcessName, PATH_MAX);
+        OS::GetCurrentDir(szCurrentDir, PATH_MAX);
+
+        for (;;) {
+            FILE *file;
+
+            if (dwCounter)
+                snprintf(szFileName, PATH_MAX, "%s%c%s.%u.%s", szCurrentDir, PATH_SEP, szProcessName, dwCounter, szExtension);
+            else
+                snprintf(szFileName, PATH_MAX, "%s%c%s.%s", szCurrentDir, PATH_SEP, szProcessName, szExtension);
+
+            file = fopen(szFileName, "rb");
+            if (file == NULL)
+                break;
+
+            fclose(file);
+
+            ++dwCounter;
+        }
+    }
+
+    OS::DebugMessage("apitrace: tracing to %s\n", szFileName);
+
+    Writer::open(szFileName);
+
+#if 0
+    // For debugging the exception handler
+    *((int *)0) = 0;
+#endif
+}
+
+unsigned LocalWriter::beginEnter(const FunctionSig *sig) {
+    OS::AcquireMutex();
+    ++acquired;
+
+    if (!m_file->isOpened()) {
+        open();
+    }
+
+    return Writer::beginEnter(sig);
+}
+
+void LocalWriter::endEnter(void) {
+    Writer::endEnter();
+    --acquired;
+    OS::ReleaseMutex();
+}
+
+void LocalWriter::beginLeave(unsigned call) {
+    OS::AcquireMutex();
+    ++acquired;
+    Writer::beginLeave(call);
+}
+
+void LocalWriter::endLeave(void) {
+    Writer::endLeave();
+    --acquired;
+    OS::ReleaseMutex();
+}
+
+void LocalWriter::flush(void) {
+    /*
+     * Do nothing if the mutex is already acquired (e.g., if a segfault happen
+     * while writing the file) to prevent dead-lock.
+     */
+
+    if (!acquired) {
+        OS::AcquireMutex();
+        if (m_file->isOpened()) {
+            OS::DebugMessage("apitrace: flushing trace due to an exception\n");
+            m_file->flush();
+        }
+        OS::ReleaseMutex();
+    }
+}
+
+
+LocalWriter localWriter;
+
+
+} /* namespace Trace */
+