Milestone 5: deliver embedded RDP sessions and lifecycle hardening

third_party/FreeRDP/winpr/libwinpr/utils/execinfo/debug.c

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+/**
+ * WinPR: Windows Portable Runtime
+ * Debugging Utils
+ *
+ * Copyright 2014 Armin Novak <armin.novak@thincast.com>
+ * Copyright 2014 Thincast Technologies GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+#include <execinfo.h>
+
+#include "debug.h"
+
+typedef struct
+{
+	void** buffer;
+	size_t max;
+	size_t used;
+} t_execinfo;
+
+void winpr_execinfo_backtrace_free(void* buffer)
+{
+	t_execinfo* data = (t_execinfo*)buffer;
+	if (!data)
+		return;
+
+	free((void*)data->buffer);
+	free(data);
+}
+
+void* winpr_execinfo_backtrace(DWORD size)
+{
+	t_execinfo* data = calloc(1, sizeof(t_execinfo));
+
+	if (!data)
+		return nullptr;
+
+	data->buffer = (void**)calloc(size, sizeof(void*));
+
+	if (!data->buffer)
+	{
+		free(data);
+		return nullptr;
+	}
+
+	assert(size <= INT32_MAX);
+	const int rc = backtrace(data->buffer, (int)size);
+	if (rc < 0)
+	{
+		free(data);
+		return nullptr;
+	}
+	data->max = size;
+	data->used = (size_t)rc;
+	return data;
+}
+
+char** winpr_execinfo_backtrace_symbols(void* buffer, size_t* used)
+{
+	t_execinfo* data = (t_execinfo*)buffer;
+	if (used)
+		*used = 0;
+
+	if (!data)
+		return nullptr;
+
+	if (used)
+		*used = data->used;
+
+	assert(data->used < INT32_MAX);
+	return backtrace_symbols(data->buffer, (int)data->used);
+}
+
+void winpr_execinfo_backtrace_symbols_fd(void* buffer, int fd)
+{
+	t_execinfo* data = (t_execinfo*)buffer;
+
+	if (!data)
+		return;
+
+	assert(data->used <= INT32_MAX);
+	backtrace_symbols_fd(data->buffer, (int)data->used, fd);
+}

third_party/FreeRDP/winpr/libwinpr/utils/execinfo/debug.h

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+/**
+ * WinPR: Windows Portable Runtime
+ * WinPR Debugging helpers
+ *
+ * Copyright 2022 Armin Novak <armin.novak@thincast.com>
+ * Copyright 2022 Thincast Technologies GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef WINPR_DEBUG_EXECINFO_H
+#define WINPR_DEBUG_EXECINFO_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <winpr/wtypes.h>
+
+	void* winpr_execinfo_backtrace(DWORD size);
+	void winpr_execinfo_backtrace_free(void* buffer);
+	char** winpr_execinfo_backtrace_symbols(void* buffer, size_t* used);
+	void winpr_execinfo_backtrace_symbols_fd(void* buffer, int fd);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* WINPR_DEBUG_EXECINFO_H */