Segfault toward end of hotspot-comp build

[Krystal Mok]

Hi Charles,

It's not a segfault, but rather hitting an assertion when initializing the
VM in the test gamma run, during the last part of the build process.
The VM is already fully built and linked by then, so it looks like the VM
compiled cleanly.

A wild guess of what caused this problem would be: something's not right in
your HotSpot code, specifically, src/share/vm/runtime/arguments.cpp, in
Arguments::set_heap_size(), or in src/share/vm/runtime/globals.hpp.

The assertion is indicating that someone is trying to set a flag with the
type uintx (in Arguments::set_heap_size(), with either of the two
macros, FLAG_SET_CMDLINE or FLAG_SET_ERGO), but the flag was declared to be
of another type (in globals.hpp).

I'd suggest cleaning the source directory (at least arguments.cpp and
globals.hpp) and try building it again. I've just done building the current
tip of hotspot-comp (with no other patches applied), and nothing weird
happened:

cd linux_amd64_compiler2/product && ./test_gamma
java full version "1.6.0_25-b06"
Using java runtime at: /home/rednaxelafx/sdk/jdk1.6.0_25/jre
java version "1.6.0_25"
Java(TM) SE Runtime Environment (build 1.6.0_25-b06)
OpenJDK 64-Bit Server VM (build 22.0-b02-internal, mixed mode)

 1. A1 B5 C8 D6 E3 F7 G2 H4
...
92. A8 B4 C1 D3 E6 F2 G7 H5

Regards,
Kris Mok

On Tue, Sep 6, 2011 at 10:53 PM, Charles Oliver Nutter
<headius at headius.com>wrote:

> Perhaps I've got an environmental issue here, but I'd like to be sure
> I'm building hotspot-comp properly. What's causing this?
>
> Linking vm...
> echo Linking launcher...
> Linking launcher...
> gcc -m64 -Xlinker -O1 -Wl,--hash-style=both  -Xlinker -z -Xlinker
> noexecstack -m64 -Xlinker -export-dynamic  -L `pwd` -o gamma
> launcher/java_md.o launcher/jli_util.o launcher/wildcard.o
> launcher/java.o -ljvm -lm -ldl -lpthread
> make[4]: Leaving directory
> `/home/headius/projects/hotspot/build/linux/linux_amd64_compiler2/product'
> All done.
> make[3]: Leaving directory
> `/home/headius/projects/hotspot/build/linux/linux_amd64_compiler2/product'
> cd linux_amd64_compiler2/product && ./test_gamma
> java full version "1.7.0_02-ea-b05"
> Using java runtime at:
> /home/headius/java/re/j2se/1.7.0/latest/binaries/linux-amd64/jre
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> #  Internal Error (globals.cpp:374), pid=14670, tid=47908911146752
> #  guarantee(faddr != NULL && faddr->is_uintx()) failed: wrong flag type
> #
> # JRE version: 7.0_02-b05
> # Java VM: OpenJDK 64-Bit Server VM (22.0-b02-internal mixed mode
> linux-amd64 compressed oops)
> # Failed to write core dump. Core dumps have been disabled. To enable
> core dumping, try "ulimit -c unlimited" before starting Java again
> #
> # An error report file with more information is saved as:
> #
> /home/headius/projects/hotspot/build/linux/linux_amd64_compiler2/product/hs_err_pid14670.log
> #
> # If you would like to submit a bug report, please visit:
> #   http://bugreport.sun.com/bugreport/crash.jsp
> #
> Aborted
> make[2]: *** [product] Error 134
> make[2]: Leaving directory `/home/headius/projects/hotspot/build/linux'
> make[1]: *** [generic_build2] Error 2
> make[1]: Leaving directory `/home/headius/projects/hotspot/make'
> make: *** [product] Error 2
> make: Leaving directory `/home/headius/projects/hotspot/make'
>
> And the relevant bit of hs_err:
>
> ---------------  T H R E A D  ---------------
>
> Current thread is native thread
>
> Stack: [0x00002b92a9916000,0x00002b92a9a17000],
> sp=0x00002b92a9a14930,  free space=1018k
> Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native
> code)
> V  [libjvm.so+0x867454]  VMError::report_and_die()+0x174
> V  [libjvm.so+0x3e0b6a]  report_vm_error(char const*, int, char
> const*, char const*)+0x4a
> V  [libjvm.so+0x492000]
> CommandLineFlagsEx::uintxAtPut(CommandLineFlagWithType, unsigned long,
> FlagValueOrigin)+0x60
> V  [libjvm.so+0x21b82a]  Arguments::set_heap_size()+0x10a
> V  [libjvm.so+0x22009d]  Arguments::parse(JavaVMInitArgs const*)+0x4bd
> V  [libjvm.so+0x81f66d]  Threads::create_vm(JavaVMInitArgs*, bool*)+0x8d
> V  [libjvm.so+0x528a0f]  JNI_CreateJavaVM+0x6f
> C  [gamma+0x5002]  printf@@GLIBC_2.2.5+0x5002
> C  [gamma+0x3dd8]  JavaMain+0xc1
>
> The script I'm using to build:
>
> https://gist.github.com/1148321
>
> - Charlie
>
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