Thanks Ben. Yeah, that’s strange. I also noticed that SetDataReadOnly didn’t exist in 10.4.132. Moreover, the V8_FATAL exception that is raised was added even later. Maybe my records about 10.4.132 are wrong, but I am sure that we built v8 last time in August 2022, so I can’t explain it.
Android Studio don’t show any error message more than the stacktrace I already shared. My guess is that kMinimumOSPageSize was still 4KB for Android back then when I built v8 (yet I can’t explain why SetDataReadOnly is part of the stacktrace). Is there any way for me to overwrite kMinimumOSPageSize from “outside” v8, just to test if that makes a difference? Thanks! > On Sep 12, 2025, at 5:20 AM, Ben Noordhuis <i...@bnoordhuis.nl> wrote: > > On Fri, Sep 12, 2025 at 8:26 AM 'Mati Cohen' via v8-users > <v8-users@googlegroups.com> wrote: >> >> Hi, >> >> My app is using v8 to run a JS environment. Last time I built v8 was about 3 >> years ago by pointing to 10.4.132. >> >> As per Google policy, my app needs to support 16 KB page size and I've been >> checking all my dependencies to meet that criteria. >> >> Apparently, based on my checks, my v8 build does support it and I managed to >> run the app on my device. >> However, v8 is crashing as soon as I call V8::Initialize(); with the >> following stack trace: >> >> /base.apk!liben8.so (offset 0x8ad8000) (v8::base::OS::Abort()+28) >> /base.apk!liben8.so (offset 0x8ad8000) (V8_Fatal(char const*, ...)+376) >> /base.apk!liben8.so (offset 0x8ad8000) (v8::base::OS::SetDataReadOnly(void*, >> unsigned long)+52) >> /base.apk!liben8.so (offset 0x8ad8000) (v8::internal::V8::Initialize()+1552) >> /base.apk!liben8.so (offset 0x8ad8000) (v8::V8::Initialize(int)+28) >> /base.apk!liben8.so (offset 0x8ad8000) (Runtime::Runtime(_JNIEnv*)+172) >> >> As explained at >> https://www.google.com/url?q=https://developer.android.com/guide/practices/page-sizes%23check-code&source=gmail-imap&ust=1758273654000000&usg=AOvVaw2eBFhXRa0E0P-iWsikoJCW, >> I was trying to look for references to PAGE_SIZE and 4096 to see if I was >> setting up something wrong, but I didn't find anything. >> >> Does anyone have any knowledge about this? >> Thanks a lot, >> Mati > > V8 doesn't use PAGE_SIZE, it uses sysconf(_SC_PAGESIZE). > > You mention 10.4.132 but that stack trace is from a different version, > isn't it? Because SetDataReadOnly didn't exist back then. > > It crashes when trying to mprotect(PROT_READ) the command line flags, > v8_flags. v8_flags is aligned to kMinimumOSPageSize and that _should_ > be 16k on Android but you'll want to double-check that. It's defined > in src/base/build_config.h. > > What error message did V8 print? > > -- > -- > v8-users mailing list > v8-users@googlegroups.com > https://www.google.com/url?q=http://groups.google.com/group/v8-users&source=gmail-imap&ust=1758273654000000&usg=AOvVaw3Vi2w6FFQXBkM9c-JZXWPp > --- > You received this message because you are subscribed to a topic in the Google > Groups "v8-users" group. > To unsubscribe from this topic, visit > https://www.google.com/url?q=https://groups.google.com/d/topic/v8-users/7XDxoIaXdV4/unsubscribe&source=gmail-imap&ust=1758273654000000&usg=AOvVaw0flrzsS8NN-9t4czOPfrqp. > To unsubscribe from this group and all its topics, send an email to > v8-users+unsubscr...@googlegroups.com. > To view this discussion visit > https://www.google.com/url?q=https://groups.google.com/d/msgid/v8-users/CAHQurc-SN0whK9Y3U8%253DSEdMPOVJLfhQ7fVPcqUi_kAjDJywGeQ%2540mail.gmail.com&source=gmail-imap&ust=1758273654000000&usg=AOvVaw0W3G7qAhJMvkfEdoop6uqR. -- -- 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 visit https://groups.google.com/d/msgid/v8-users/D27EC591-82E7-43AB-B309-D7D01E9B3123%40encircleapp.com.
