Insights-compatible memory tracking (#214)

This change introduces support for tracing of memory allocation activity. The code is ported from UE5, and Unreal Insights can be used to analyze the output. This is currently only fully supported on Windows, but will be extended to Mac/Linux in the near future.

To activate full memory tracking, pass `--trace=memory` on the commandline alongside `--tracehost=<ip>` or `-tracefile=<path>`. For more control over how much detail is traced you can instead pass some combination of `callstack`, `memtag`, `memalloc` instead. In practice, `--trace=memory` is an alias for `--trace=callstack,memtag,memalloc`). For convenience we also support `--trace=memory_light` which omits call stacks.

This change also introduces multiple memory allocators, which may be selected via command-line option `--malloc=<allocator>`:

* `mimalloc` - mimalloc (default, same as before)
* `rpmalloc` - rpmalloc is another high performance allocator for multithreaded applications which may be a better option than mimalloc (to be evaluated). Due to toolchain limitations this is currently only supported on Windows.
* `stomp` - an allocator intended to be used during development/debugging to help track down memory issues such as use-after-free or out-of-bounds access. Currently only supported on Windows.
* `ansi` - fallback to default system allocator

1 files changed, 111 insertions, 0 deletions

diff --git a/thirdparty/rpmalloc/rpnew.h b/thirdparty/rpmalloc/rpnew.h
new file mode 100644
index 000000000..75d381a3f
--- /dev/null
+++ b/thirdparty/rpmalloc/rpnew.h
@@ -0,0 +1,111 @@
+
+#ifdef __cplusplus
+
+#include <new>
+#include <rpmalloc.h>
+
+#ifndef __CRTDECL
+#define __CRTDECL
+#endif
+
+extern void __CRTDECL
+operator delete(void* p) noexcept {
+	rpfree(p);
+}
+
+extern void __CRTDECL
+operator delete[](void* p) noexcept {
+	rpfree(p);
+}
+
+extern void* __CRTDECL
+operator new(std::size_t size) noexcept(false) {
+	return rpmalloc(size);
+}
+
+extern void* __CRTDECL
+operator new[](std::size_t size) noexcept(false) {
+	return rpmalloc(size);
+}
+
+extern void* __CRTDECL
+operator new(std::size_t size, const std::nothrow_t& tag) noexcept {
+	(void)sizeof(tag);
+	return rpmalloc(size);
+}
+
+extern void* __CRTDECL
+operator new[](std::size_t size, const std::nothrow_t& tag) noexcept {
+	(void)sizeof(tag);
+	return rpmalloc(size);
+}
+
+#if (__cplusplus >= 201402L || _MSC_VER >= 1916)
+
+extern void __CRTDECL
+operator delete(void* p, std::size_t size) noexcept {
+	(void)sizeof(size);
+	rpfree(p);
+}
+
+extern void __CRTDECL
+operator delete[](void* p, std::size_t size) noexcept {
+	(void)sizeof(size);
+	rpfree(p);
+}
+
+#endif
+
+#if (__cplusplus > 201402L || defined(__cpp_aligned_new))
+
+extern void __CRTDECL
+operator delete(void* p, std::align_val_t align) noexcept {
+	(void)sizeof(align);
+	rpfree(p);
+}
+
+extern void __CRTDECL
+operator delete[](void* p, std::align_val_t align) noexcept {
+	(void)sizeof(align);
+	rpfree(p);
+}
+
+extern void __CRTDECL
+operator delete(void* p, std::size_t size, std::align_val_t align) noexcept {
+	(void)sizeof(size);
+	(void)sizeof(align);
+	rpfree(p);
+}
+
+extern void __CRTDECL
+operator delete[](void* p, std::size_t size, std::align_val_t align) noexcept {
+	(void)sizeof(size);
+	(void)sizeof(align);
+	rpfree(p);
+}
+
+extern void* __CRTDECL
+operator new(std::size_t size, std::align_val_t align) noexcept(false) {
+	return rpaligned_alloc(static_cast<size_t>(align), size);
+}
+
+extern void* __CRTDECL
+operator new[](std::size_t size, std::align_val_t align) noexcept(false) {
+	return rpaligned_alloc(static_cast<size_t>(align), size);
+}
+
+extern void* __CRTDECL
+operator new(std::size_t size, std::align_val_t align, const std::nothrow_t& tag) noexcept {
+	(void)sizeof(tag);
+	return rpaligned_alloc(static_cast<size_t>(align), size);
+}
+
+extern void* __CRTDECL
+operator new[](std::size_t size, std::align_val_t align, const std::nothrow_t& tag) noexcept {
+	(void)sizeof(tag);
+	return rpaligned_alloc(static_cast<size_t>(align), size);
+}
+
+#endif
+
+#endif