4 files changed, 69 insertions, 2 deletions
diff --git a/erts/etc/common/erlexec.c b/erts/etc/common/erlexec.c
index 709c6f02d1..5ebde8ca3c 100644
--- a/erts/etc/common/erlexec.c
+++ b/erts/etc/common/erlexec.c
@@ -128,6 +128,7 @@ static char *pluss_val_switches[] = {
     "bwt",
     "cl",
     "ct",
+    "ecio",
     "fwi",
     "tbt",
     "wct",
diff --git a/erts/etc/unix/etp-commands.in b/erts/etc/unix/etp-commands.in
index bf6eb00314..0190ea613e 100644
--- a/erts/etc/unix/etp-commands.in
+++ b/erts/etc/unix/etp-commands.in
@@ -1130,6 +1130,39 @@ document etp-cp
 %---------------------------------------------------------------------------
 end
 
+define etp-check-beam-ranges
+  set $etp_ci = 0
+  while $etp_ci < 3
+    printf "Checking code index %i...\n", $etp_ci
+    set $etp_j = 0
+    while $etp_j < r[$etp_ci].n
+      set $etp_p = &r[$etp_ci].modules[$etp_j]
+      if $etp_j > 0 && $etp_p->start < (Range*)$etp_p[-1].end.counter
+        printf "r[%i].modules[%i]: ERROR start < previous\n", $etp_ci, $etp_j
+      end
+      if $etp_p->start > (Range*)$etp_p->end.counter
+        printf "r[%i].modules[%i]: ERROR start > end\n", $etp_ci, $etp_j
+      else
+        if $etp_p->start == (Range*)$etp_p->end.counter
+          printf "r[%i].modules[%i]: Purged\n", $etp_ci, $etp_j
+        end
+      end
+      set $etp_j = $etp_j + 1
+    end
+    set $etp_ci = $etp_ci + 1
+  end
+end
+
+document etp-check-beam-ranges
+%---------------------------------------------------------------------------
+% etp-check-beam-ranges
+%
+% Do consistency check of beam_ranges data structure
+% and print errors and empty slots from purged modules.
+%---------------------------------------------------------------------------
+end
+
+
 ############################################################################
 # Commands for special term bunches.
 #
@@ -3552,6 +3585,39 @@ document etp-carrier-blocks
 %---------------------------------------------------------------------------
 end
 
+define etp-address-to-beam-opcode
+  set $etp_i = 0
+  set $etp_min_diff = ((UWord)1 << (sizeof(UWord)*8 - 1))
+  set $etp_min_opcode = -1
+  set $etp_addr = (UWord) ($arg0)
+
+  while $etp_i < num_instructions && $etp_min_diff > 0
+    if ($etp_addr - (UWord)beam_ops[$etp_i]) < $etp_min_diff
+      set $etp_min_diff = $etp_addr - (UWord)beam_ops[$etp_i]
+      set $etp_min_opcode = $etp_i
+    end
+    set $etp_i = $etp_i + 1
+  end
+  if $etp_min_diff == 0
+    printf "Address %p is start of '%s'\n", $etp_addr, opc[$etp_min_opcode].name
+  else
+    if $etp_min_opcode >= 0
+      printf "Address is %ld bytes into opcode '%s' at %p\n", $etp_min_diff, opc[$etp_min_opcode].name, beam_ops[$etp_min_opcode]
+    else
+      printf "Invalid opcode address\n"
+    end
+  end
+end
+
+document etp-address-to-beam-opcode
+%---------------------------------------------------------------------------
+% Get beam opcode from a native instruction address (within process_main())
+% Arg: Instructon pointer value
+%
+% Does not work with NO_JUMP_TABLE
+%---------------------------------------------------------------------------
+end
+
 
 ############################################################################
 # Toolbox parameter handling
diff --git a/erts/etc/win32/Install.c b/erts/etc/win32/Install.c
index 500fd166f8..9d85d642ab 100644
--- a/erts/etc/win32/Install.c
+++ b/erts/etc/win32/Install.c
@@ -80,7 +80,7 @@ int wmain(int argc, wchar_t **argv)
 	}
     }
     if (root == NULL) {
-	if (module = NULL) {
+	if (module == NULL) {
 	    fprintf(stderr, "Cannot GetModuleHandle()\n");
 	    exit(1);
 	}
diff --git a/erts/etc/win32/erl.c b/erts/etc/win32/erl.c
index 1d116bf36e..772b668586 100644
--- a/erts/etc/win32/erl.c
+++ b/erts/etc/win32/erl.c
@@ -264,7 +264,7 @@ static void get_parameters(void)
     int len;
 
 
-    if (module = NULL) {
+    if (module == NULL) {
         error("Cannot GetModuleHandle()");
     }