[Bug libgcj/21285] gij fails to handle NullPointerException exception

["tsv at solvo dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From tsv at solvo dot ru  2005-05-03 19:46 -------
Here is another stack dump from attempt of running the "ant":
exec "/usr/lib/jvm/java/bin/java" -classpath
"/usr/share/java/ant.jar:/usr/share/java/ant-launcher.jar:/usr/share/java/jaxp_parser_impl.jar:/usr/share/java/xml-commons-apis.jar:/usr/share/java/jakarta-commons-logging.jar:/usr/share/java/ant/ant-commons-logging.jar:/usr/lib/jvm/java/lib/tools.jar:/usr/share/java/jdtcore.jar"
-Dant.home="/usr/share/ant" -Dant.library.dir="/usr/share/ant/lib"
org.apache.tools.ant.launch.Launcher -lib ""

The "ra" member of context parameter has bad value, but how it got it ... I
could not trace.

This issue might not be related to original one, but it fails in unwind logic
too (so it could give more info).

My test case (and "ant") worked on gcc 3.4.3 version built on the environment.

If you need more info about my environment I would glad to tell.

Thank you.

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 2199023384624 (LWP 32406)]
0x0000020001886254 in alpha_fallback_frame_state (context=0x11f831c28,
    fs=0x11f831e68) at ../../gcc/config/alpha/linux-unwind.h:45
45        if (pc[0] != 0x47fe0410               /* mov $30,$16 */
(gdb) bt
#0  0x0000020001886254 in alpha_fallback_frame_state (context=0x11f831c28,
    fs=0x11f831e68) at ../../gcc/config/alpha/linux-unwind.h:45
#1  0x0000020001887eac in uw_frame_state_for (context=0x11f831c28,
    fs=0x11f831e68) at ../../gcc/unwind-dw2.c:978
#2  0x000002000188a0bc in _Unwind_Backtrace (
    trace=0x20001981700 <backtrace_helper>, trace_argument=0x11f832320)
    at ../../gcc/unwind.inc:296
#3  0x0000020001981804 in backtrace () from /lib/tls/libc.so.6.1
#4  0x0000020000b833ec in gnu::gcj::runtime::StackTrace::fillInStackTrace (
    this=0x20002839188, maxlen=Variable "maxlen" is not available.
)
    at ../../../libjava/gnu/gcj/runtime/natStackTrace.cc:60
#5  0x0000020000c5eaf4 in gnu.gcj.runtime.StackTrace.StackTrace(int) (
    this=0x20002839188, n=128)
    at ../../../libjava/gnu/gcj/runtime/StackTrace.java:67
#6  0x0000020000bce9c4 in
java.lang.VMThrowable.fillInStackTrace(java.lang.Throwable) (t=Variable "t" is
not available.
) at ../../../libjava/java/lang/VMThrowable.java:80
#7  0x0000020000bcbd20 in java.lang.Throwable.fillInStackTrace() (
    this=0x200027f99a0) at ../../../libjava/java/lang/Throwable.java:502
#8  0x0000020000bcb2d4 in java.lang.Throwable.Throwable(java.lang.String) (
    this=0x200027f99a0, message=0x2000284d540)
    at ../../../libjava/java/lang/Throwable.java:157
#9  0x0000020000bb4de8 in java.lang.Exception.Exception(java.lang.String) (
    this=Variable "this" is not available.
) at ../../../libjava/java/lang/Exception.java:77
#10 0x0000020000bdb818 in java.io.IOException.IOException(java.lang.String) (
    this=Variable "this" is not available.
) at ../../../libjava/java/io/IOException.java:71
#11 0x0000020000b7e294 in gnu::gcj::Core::create (name=Variable "name" is not
available.
)
    at ../../../libjava/gnu/gcj/natCore.cc:111
#12 0x0000020000c9d0a8 in gnu.java.net.protocol.core.Connection.connect() (
    this=Variable "this" is not available.
) at ../../../libjava/gnu/java/net/protocol/core/Connection.java:50
#13 0x0000020000c9d348 in gnu.java.net.protocol.core.Connection.getHeaders() (
    this=0x20002842f78)
    at ../../../libjava/gnu/java/net/protocol/core/Connection.java:154
#14 0x0000020000c9d6d8 in
gnu.java.net.protocol.core.Connection.getHeaderField(java.lang.String)
(this=0x20002842f78, name=0x20001ac9200)
    at ../../../libjava/gnu/java/net/protocol/core/Connection.java:69
#15 0x0000020000d35174 in
java.net.URLConnection.getHeaderFieldInt(java.lang.String, int) (this=Variable
"this" is not available.
) at ../../../libjava/java/net/URLConnection.java:343
#16 0x0000020000d34f98 in java.net.URLConnection.getContentLength()
(this=Variable "this" is not available.
)
    at ../../../libjava/java/net/URLConnection.java:220
#17 0x0000020000d320a4 in
java.net.URLClassLoader$RemoteURLLoader.getResource(java.lang.String)
(this=0x20001b1d428, name=0x200028480c0)
    at ../../../libjava/java/net/URLClassLoader.java:475
#18 0x0000020000d33b74 in java.net.URLClassLoader.findClass(java.lang.String) (
    this=0x20001b7fea0, className=0x2000284d5c0)
    at ../../../libjava/java/net/URLClassLoader.java:921
#19 0x0000020000c58d84 in
gnu.gcj.runtime.BootClassLoader.bootLoadClass(java.lang.String)
(this=0x20001b7fea0, name=0x2000284d5c0)
---Type <return> to continue, or q <return> to quit---
    at ../../../libjava/gnu/gcj/runtime/BootClassLoader.java:52
#20 0x0000020000b9bf44 in java::lang::VMClassLoader::loadClass (
    name=0x2000284d5c0, resolve=0 '\0')
    at ../../../libjava/java/lang/natVMClassLoader.cc:205
#21 0x0000020000bb2e7c in java.lang.ClassLoader.loadClass(java.lang.String,
boolean) (this=0x20001b7ff80, name=0x2000284d5c0, resolve=false)
    at ../../../libjava/java/lang/ClassLoader.java:304
#22 0x0000020000bb2e5c in java.lang.ClassLoader.loadClass(java.lang.String,
boolean) (this=0x20001b7ff10, name=0x2000284d5c0, resolve=false)
    at ../../../libjava/java/lang/ClassLoader.java:310
#23 0x0000020000bb2990 in java.lang.ClassLoader.loadClass(java.lang.String) (
    this=Variable "this" is not available.
) at ../../../libjava/java/lang/ClassLoader.java:260
#24 0x0000020000b90ff8 in _Jv_FindClass (name=0x20002614dc8,
    loader=0x20001b7ff10) at ../../../libjava/java/lang/natClassLoader.cc:242
#25 0x0000020000b61a30 in _Jv_Linker::resolve_pool_entry (klass=0x2000261fcb0,
    index=173) at ../../../libjava/link.cc:240
#26 0x0000020000b69df8 in _Jv_InterpMethod::run (this=0x20001ce2bb0,
    retp=0x11f832d20, args=0x11f832c70) at ../../../libjava/interpret.cc:2956
#27 0x0000020000b6cb9c in _Jv_InterpMethod::run_normal (ret=Variable "ret" is
not available.
)
    at ../../../libjava/interpret.cc:277
#28 0x00000200010edad0 in ffi_java_translate_args (cif=0x20001d4fd80,
    rvalue=0x11f832d20, avalue=0x11f832cd0, user_data=0x20001d4fd40)
    at ../../../libffi/src/java_raw_api.c:309
#29 0x00000200010ee044 in ffi_closure_osf_inner (closure=Variable "closure" is
not available.
)
    at ../../../libffi/src/alpha/ffi.c:248
#30 0x00000200010ee1d4 in ffi_closure_osf ()
    at ../../../libffi/src/alpha/osf.S:158
#31 0x0000020000b8fe38 in java::lang::Class::newInstance (this=Variable "this"
is not available.
)
    at ../../../libjava/java/lang/natClass.cc:703
#32 0x0000000000000001 in ?? ()
Cannot access memory at address 0xfffffffffffffffd
(gdb) p context
$1 = (struct _Unwind_Context *) 0x11f831c28
(gdb) p *context
$2 = {reg = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x11f832cf8,
    0x11f832da8, 0x11f832ca8, 0x11f832db0, 0x11f832cb8, 0x11f832b70,
    0x11f832d00, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
    0x11f832da0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x11f831be0, 0x11f831be8,
    0x11f831bf0, 0x11f831bf8, 0x11f831c00, 0x11f831c08, 0x11f831c10,
    0x11f831c18, 0x0 <repeats 23 times>}, cfa = 0x11f832dc0, ra = 0x1,
  lsda = 0x0, bases = {tbase = 0x0, dbase = 0x0, func = 0x20000b8fcf0},
  args_size = 0}
(gdb)


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21285