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authorko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-07-26 10:28:26 +0000
committerko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2013-07-26 10:28:26 +0000
commit621da983093b0877d061c0fa081c0301ea8ffd3f (patch)
treec787bbe841722c3e7968ac515c7ee524b1f447d9 /vm_exec.h
parentd462261395534207d71d07f4a47a6860cf9349bb (diff)
downloadruby-621da983093b0877d061c0fa081c0301ea8ffd3f.tar.gz
* vm_exec.h, tool/instruction.rb: not an error, but a BUG if stack
overflow checking failed just before/after the beginning of an instruction. It should be treated as a BUG. Please tell us if your code cause BUG with this problem. This check will removed soon (for performance). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42194 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'vm_exec.h')
-rw-r--r--vm_exec.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/vm_exec.h b/vm_exec.h
index 3c7e35e238..b785c4fdd3 100644
--- a/vm_exec.h
+++ b/vm_exec.h
@@ -169,5 +169,9 @@ default: \
#endif
#define SCREG(r) (reg_##r)
+#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin) \
+ if ((VALUE *)((char *)(((VALUE *)(cfp)->sp) + (margin)) + sizeof(rb_control_frame_t)) >= ((VALUE *)(cfp))) { \
+ rb_bug("CHECK_VM_STACK_OVERFLOW_FOR_INSN: should not overflow here. Please contact ruby-core/dev with your (a part of) script. This check will be removed soon."); \
+ } while (0);
#endif /* RUBY_VM_EXEC_H */