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From: tromey@redhat.com To: gcc-gnats@gcc.gnu.org Subject: middle-end/6608: code generation bug when building libgcj Date: Wed, 08 May 2002 11:36:00 -0000 [thread overview] Message-ID: <20020508183430.28662.qmail@sources.redhat.com> (raw) >Number: 6608 >Category: middle-end >Synopsis: code generation bug when building libgcj >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Wed May 08 11:36:00 PDT 2002 >Closed-Date: >Last-Modified: >Originator: Tom Tromey >Release: gcj (GCC) 3.2 20020505 (experimental) >Organization: >Environment: >Description: I've found what I believe to be a code generation bug on the current cvs trunk. The bug apparently occurs when compiling the libgcj class java.lang.reflect.Modifier, in method isPublic(). The test case below, from the libgcj test suite, demonstrates the bug. It prints this: public private void KeepInline.example() public static void KeepInline.main(java.lang.String[]) Note the "public private". Here is what I see if I go to Modifier.isPublic in gdb: java.lang.reflect.Modifier.isPublic(int) (mod=2) at ../../../gcc/libjava/java/lang/reflect/Modifier.java:227 (gdb) p mod $5 = 2 (gdb) fini Run till exit from #0 java.lang.reflect.Modifier.isPublic(int) (mod=2) at ../../../gcc/libjava/java/lang/reflect/Modifier.java:227 0x40359dc1 in java.lang.reflect.Modifier.toString(int, java.lang.StringBuffer) (mod=2, r=@80b5be0) at ../../../gcc/libjava/java/lang/reflect/Modifier.java:302 Value returned is $6 = 2 This return value is wrong in two ways: * First, PUBLIC is 1, so the return value should be 0 * Second, the method returns a boolean so `2' is invalid anyway // Demonstrate that private methods can be reflected even if they are // not referenced at compile-time (i.e. -fkeep-inline-functions works). import java.lang.reflect.Method; public class KeepInline { private void example() { System.out.println("example"); } public static void main(String[] args) { try { KeepInline pr = new KeepInline(); Method[] meths = pr.getClass().getDeclaredMethods(); for (int n = 0; n < meths.length; n++) System.out.println(meths[n]); } catch (Throwable t) { t.printStackTrace(); } } } >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
next reply other threads:[~2002-05-08 18:36 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2002-05-08 11:36 tromey [this message] 2003-03-22 14:47 ebotcazou 2003-03-26 17:16 tromey
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