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| author | David Daney <ddaney@avtrex.com> | 2006-03-15 19:10:23 +0000 |
|---|---|---|
| committer | David Daney <daney@gcc.gnu.org> | 2006-03-15 19:10:23 +0000 |
| commit | dba370a8290f518f2274b1dd8da3459aa1844f65 (patch) | |
| tree | 7dd173d7486d8928413e09b912a0357b143e2a68 /gcc/java/gcj.texi | |
| parent | 492edb3ac5fbdee5d8383af723610f5dbc589214 (diff) | |
| download | gcc-dba370a8290f518f2274b1dd8da3459aa1844f65.zip gcc-dba370a8290f518f2274b1dd8da3459aa1844f65.tar.gz gcc-dba370a8290f518f2274b1dd8da3459aa1844f65.tar.bz2 | |
lang.opt (-freduced-reflection): New option.
* lang.opt (-freduced-reflection): New option.
* lang.c (java_post_options): Generate an error if
-freduced-reflection used with -fjni or -findirect-dispatch.
* java-tree.h (flag_reduced_reflection): Declare new variable.
* boehm.c (get_boehm_type_descriptor): Indicate all pointers
if bitmap overflows and flag_reduced_reflection set.
* class.c (uses_jv_markobj_p): New function.
(make_class_data): Moved generation of vtable to before
reflection data, generate less reflection data if
flag_reduced_reflection set.
* gcj.texi: Document -freduced-reflection.
From-SVN: r112095
Diffstat (limited to 'gcc/java/gcj.texi')
| -rw-r--r-- | gcc/java/gcj.texi | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/java/gcj.texi b/gcc/java/gcj.texi index 84659a54..ae7bcb7 100644 --- a/gcc/java/gcj.texi +++ b/gcc/java/gcj.texi @@ -546,6 +546,28 @@ This is convenient, as it means that things like @code{Class.forName()} will search @samp{CLASSPATH} to find the desired class. +@item -freduced-reflection +This option causes the code generated by @command{gcj} to contain a +reduced amount of the class meta-data used to support runtime +reflection. The cost of this savings is the loss of +the ability to use certain reflection capabilities of the standard +Java runtime environment. When set all meta-data except for that +which is needed to obtain correct runtime semantics is eliminated. + +For code that does not use reflection (i.e. the methods in the +@code{java.lang.reflect} package), @code{-freduced-reflection} +will result in proper operation with a savings in executable code size. + +JNI (@code{-fjni}) and the binary compatibility ABI +(@code{-findirect-dispatch}) do not work properly without full +reflection meta-data. Because of this, it is an error to use these options +with @code{-freduced-reflection}. + +@strong{Caution:} If there is no reflection meta-data, code that uses +a @code{SecurityManager} may not work properly. Also calling +@code{Class.forName()} may fail if the calling method has no +reflection meta-data. + @end table |