Add more limitation on searchPage

[shippomx]

To avoid goroutine stack exceeds 1000000000-byte limit.
Some records may result to func cursor.search() and cursor.searchPage recusively called.

Fixes: #402

Signed-off-by: Miao Xia xia.miao1@zte.com.cn

[ptabor]

I don't understand what's the underlying problem. Is it a single page corrupted that triggers the problem and you want to avoid navigation within a corrupted page ?

[shippomx]

You are right, i don't know how to repair the db, then i try to aviod this.

I don't understand what's the underlying problem. Is it a single page corrupted that triggers the problem and you want to avoid navigation within a corrupted page ?

[shippomx]

@ptabor Can you tell me what the difference between this commit's changes? I think it's necessarily to add the guard code:

if bytes.HasPrefix(inodes[i].key(), key) {

[ptabor]

I don't think it's a correct solution.

sort.Search spec says:

Search requires that f is false for some (possibly empty) prefix of the input range [0, n) and then true for the (possibly empty) remainder;

your change makes the function returns false for values 'before' and 'after' the interesting RANGE (that is a prefix).
This does not allow the bi-sect to work properly.

Please use the fixed file provided by @ahrtr.

[shippomx]

Thank, I have understood the differences.