Simple SIGQUIT support on Windows

configure

@@ -15138,7 +15138,7 @@ fi
 
 case $host_os in
   mingw*)
-    LIBS="$LIBS -lws2_32 -lpsapi -liphlpapi -lshell32 -lsecur32 -luserenv -luser32"
+    LIBS="$LIBS -lws2_32 -lpsapi -liphlpapi -lshell32 -lsecur32 -luserenv -luser32 -ldbghelp -lole32 -luuid"
  ;;
 esac
 case $host_os in

configure.ac

@@ -74,7 +74,7 @@ AM_CONDITIONAL([OS400],    [AS_CASE([$host_os],[os400],         [true], [false])
 AM_CONDITIONAL([SUNOS],    [AS_CASE([$host_os],[solaris*],      [true], [false])])
 AM_CONDITIONAL([WINNT],    [AS_CASE([$host_os],[mingw*],        [true], [false])])
 AS_CASE([$host_os],[mingw*], [
-    LIBS="$LIBS -lws2_32 -lpsapi -liphlpapi -lshell32 -lsecur32 -luserenv -luser32"
+    LIBS="$LIBS -lws2_32 -lpsapi -liphlpapi -lshell32 -lsecur32 -luserenv -luser32 -ldbghelp -lole32 -luuid"
 ])
 AS_CASE([$host_os], [netbsd*], [AC_CHECK_LIB([kvm], [kvm_open])])
 AS_CASE([$host_os], [kfreebsd*], [

include/uv/win.h

@@ -57,6 +57,7 @@ typedef intptr_t ssize_t;
 /* Signals supported by uv_signal and or uv_kill */
 #define SIGHUP                1
 #define SIGINT                2
+#define SIGQUIT               3
 #define SIGILL                4
 #define SIGABRT_COMPAT        6
 #define SIGFPE                8

src/win/process.c

@@ -30,6 +30,9 @@
 #include "internal.h"
 #include "handle-inl.h"
 #include "req-inl.h"
+#include <dbghelp.h>
+#include <shlobj.h>
+#include <psapi.h>     /* GetModuleBaseNameW */
 
 
 typedef struct env_var {
@@ -1250,7 +1253,116 @@ static int uv__kill(HANDLE process_handle, int signum) {
     return UV_EINVAL;
   }
 
+  /* Create a dump file for the targeted process, if the registry key
+   * `HKLM:Software\Microsoft\Windows\Windows Error Reporting\LocalDumps`
+   * exists.  The location of the dumps can be influenced by the `DumpFolder`
+   * sub-key, which has a default value of `%LOCALAPPDATA%\CrashDumps`, see [0]
+   * for more detail.  Note that if the dump folder does not exist, we attempt
+   * to create it, to match behavior with WER itself.
+   * [0]: https://learn.microsoft.com/en-us/windows/win32/wer/collecting-user-mode-dumps */
+  if (signum == SIGQUIT) {
+    HKEY registry_key;
+    DWORD pid, ret;
+    WCHAR basename[MAX_PATH];
+
+    /* Get target process name. */
+    GetModuleBaseNameW(process_handle, NULL, &basename[0], sizeof(basename));
+
+    /* Get PID of target process. */
+    pid = GetProcessId(process_handle);
+
+    /* Get LocalDumps directory path. */
+    ret = RegOpenKeyExW(
+        HKEY_LOCAL_MACHINE,
+        L"SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\LocalDumps",
+        0,
+        KEY_QUERY_VALUE,
+        &registry_key);
+    if (ret == ERROR_SUCCESS) {
+      HANDLE hDumpFile = NULL;
+      WCHAR dump_folder[MAX_PATH], dump_name[MAX_PATH];
+      DWORD dump_folder_len = sizeof(dump_folder), key_type = 0;
+      ret = RegGetValueW(registry_key,
+                         NULL,
+                         L"DumpFolder",
+                         RRF_RT_ANY,
+                         &key_type,
+                         (PVOID) dump_folder,
+                         &dump_folder_len);
+      if (ret != ERROR_SUCCESS) {
+        /* Default value for `dump_folder` is `%LOCALAPPDATA%\CrashDumps`. */
+        WCHAR* localappdata;
+        SHGetKnownFolderPath(&FOLDERID_LocalAppData, 0, NULL, &localappdata);
+        _snwprintf_s(dump_folder,
+                     sizeof(dump_folder),
+                     _TRUNCATE,
+                     L"%ls\\CrashDumps",
+                     localappdata);
+        CoTaskMemFree(localappdata);
+      }
+      RegCloseKey(registry_key);
+
+      /* Create dump folder if it doesn't already exist. */
+      CreateDirectoryW(dump_folder, NULL);
+
+      /* Construct dump filename from process name and PID. */
+      _snwprintf_s(dump_name,
+                   sizeof(dump_name),
+                   _TRUNCATE,
+                   L"%ls\\%ls.%d.dmp",
+                   dump_folder,
+                   basename,
+                   pid);
+
+      hDumpFile = CreateFileW(dump_name,
+                              GENERIC_WRITE,
+                              0,
+                              NULL,
+                              CREATE_NEW,
+                              FILE_ATTRIBUTE_NORMAL,
+                              NULL);
+      if (hDumpFile != INVALID_HANDLE_VALUE) {
+        DWORD dump_options, sym_options;
+        FILE_DISPOSITION_INFO DeleteOnClose = { TRUE };
+
+        /* If something goes wrong while writing it out, delete the file. */
+        SetFileInformationByHandle(hDumpFile,
+                                   FileDispositionInfo,
+                                   &DeleteOnClose,
+                                   sizeof(DeleteOnClose));
+
+        /* Tell wine to dump ELF modules as well. */
+        sym_options = SymGetOptions();
+        SymSetOptions(sym_options | 0x40000000);
+
+        /* We default to a fairly complete dump.  In the future, we may want to
+         * allow clients to customize what kind of dump to create. */
+        dump_options = MiniDumpWithFullMemory |
+                       MiniDumpIgnoreInaccessibleMemory |
+                       MiniDumpWithAvxXStateContext;
+
+        if (MiniDumpWriteDump(process_handle,
+                              pid,
+                              hDumpFile,
+                              dump_options,
+                              NULL,
+                              NULL,
+                              NULL)) {
+          /* Don't delete the file on close if we successfully wrote it out. */
+          FILE_DISPOSITION_INFO DontDeleteOnClose = { FALSE };
+          SetFileInformationByHandle(hDumpFile,
+                                     FileDispositionInfo,
+                                     &DontDeleteOnClose,
+                                     sizeof(DontDeleteOnClose));
+        }
+        SymSetOptions(sym_options);
+        CloseHandle(hDumpFile);
+      }
+    }
+  }
+
   switch (signum) {
+    case SIGQUIT:
     case SIGTERM:
     case SIGKILL:
     case SIGINT: {