It's complicated and for the details, you'll have to look at build configuration files (start with BUILD.gn and gni/v8.gni, if needed continue with generated .ninja files in the output directory), but the short answer is that the three build modes affect C++ compilation as follows: release: -O3 debug: -O0 -DDEBUG optdebug: -O2 -DDEBUG Additionally, there is a flag --debug-code that controls whether extra checks are emitted in generated code. It is on by default in when DEBUG is defined, and off by default otherwise, but can be overridden. So for your purposes, you probably want an optdebug build and the --nodebug-code command-line flag.
Please double-check everything I've said here before blindly trusting any results. On Wed, May 29, 2019 at 1:52 AM Sunghyun Park <sun...@umich.edu> wrote: > Hi, all. > > I'm trying to count the number of dynamic instructions for jitted code in > V8 by using PIN. > Since PIN leverages symbol table to identify jitted code, I needed to > compile V8 with debug mode to provide information for the symbol table. > > However, I'm not sure whether debug mode applies the same level of > optimization as release mode. > I spent some time searching, but I couldn't find any useful information. > Is there anyone who can clarify the difference between > release/debug/optdebug in V8? > Any advice would be greatly helpful. > > Thank you! > > -- > -- > v8-users mailing list > v8-users@googlegroups.com > http://groups.google.com/group/v8-users > --- > You received this message because you are subscribed to the Google Groups > "v8-users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to v8-users+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/v8-users/88fe04cf-252e-4d1d-9199-6cc868e3723b%40googlegroups.com > <https://groups.google.com/d/msgid/v8-users/88fe04cf-252e-4d1d-9199-6cc868e3723b%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/CAKSzg3QKOUkL8TJX_9d3m57b7jUrUiK2qq3fOZuEuc5Y95rhyw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
