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sandbox: Add documentation on how to run valgrind

U-Boot sandbox can run with valgrind to check memory allocations. Add
documentation on how to do this.

Signed-off-by: Simon Glass <sjg@chromium.org>
Simon Glass %!s(int64=5) %!d(string=hai) anos
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Modificáronse 1 ficheiros con 14 adicións e 0 borrados
  1. 14 0
      board/sandbox/README.sandbox

+ 14 - 0
board/sandbox/README.sandbox

@@ -442,6 +442,20 @@ If sdl-config is on a different path from the default, set the SDL_CONFIG
 environment variable to the correct pathname before building U-Boot.
 
 
+Using valgrind / memcheck
+-------------------------
+
+It is possible to run U-Boot under valgrind to check memory allocations:
+
+   valgrind u-boot
+
+If you are running sandbox SPL or TPL, then valgrind will not by default
+notice when U-Boot jumps from TPL to SPL, or from SPL to U-Boot proper. To
+fix this, use:
+
+   valgrind --trace-children=yes u-boot
+
+
 Testing
 -------