The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/dfb96b52342dab5922ac5052bd8ae0e3e22b053c

commit dfb96b52342dab5922ac5052bd8ae0e3e22b053c
Author: Michael Starzinger <mstarzinger@chromium.org>
Date: Tue Jun 05 18:21:24 2018

[wasm] Fix broken --print-wasm-code for sync compiles.

R=clemensh@chromium.org
BUG= chromium:849713 

Change-Id: I3af8a654c32f8eb77dcdd3dffeb2dd826b90db9d
Reviewed-on: https://chromium-review.googlesource.com/1087451
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53533}
[modify] https://crrev.com/dfb96b52342dab5922ac5052bd8ae0e3e22b053c/src/wasm/module-compiler.cc
[modify] https://crrev.com/dfb96b52342dab5922ac5052bd8ae0e3e22b053c/src/wasm/wasm-code-manager.cc
[modify] https://crrev.com/dfb96b52342dab5922ac5052bd8ae0e3e22b053c/src/wasm/wasm-objects.cc
[modify] https://crrev.com/dfb96b52342dab5922ac5052bd8ae0e3e22b053c/src/wasm/wasm-serialization.cc

The change in comment #2 should fix the issue. However the --print-wasm-code functionality really should be made completely independent of logging and profiling because its main intended uses is for debugging purposes and it should be done rock-solid in WasmCodeManager when new code is added. Hence I'll leave this issue open as a tracking issue, but with lower priority.

The following revision refers to this bug:
  https://chromium.googlesource.com/v8/v8.git/+/fd047dde53d4c94616bb107251fd9556873deb6a

commit fd047dde53d4c94616bb107251fd9556873deb6a
Author: Michael Starzinger <mstarzinger@chromium.org>
Date: Wed Jun 06 12:04:01 2018

[wasm] Simplify --print-wasm-code to print earlier.

This makes sure {WasmCode} object are printed right after they have been
added to a {NativeModule} instead of waiting until the module is done.
This way debug output can be inspected as early as possible and works
even when there are issues later before the module is finished.

R=herhut@chromium.org
BUG= chromium:849713 

Change-Id: Icced39cfaad7c033de569fbec21c26506f5796a6
Reviewed-on: https://chromium-review.googlesource.com/1088614
Reviewed-by: Stephan Herhut <herhut@chromium.org>
Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53549}
[modify] https://crrev.com/fd047dde53d4c94616bb107251fd9556873deb6a/src/compiler/pipeline.cc
[modify] https://crrev.com/fd047dde53d4c94616bb107251fd9556873deb6a/src/wasm/wasm-code-manager.cc
[modify] https://crrev.com/fd047dde53d4c94616bb107251fd9556873deb6a/src/wasm/wasm-serialization.cc