* [Bug translator/2205] New: Systemtap parser will fall into infinite loop.
@ 2006-01-25 11:48 hiramatu at sdl dot hitachi dot co dot jp
2006-01-25 15:01 ` [Bug translator/2205] " fche at redhat dot com
2006-02-01 20:40 ` fche at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: hiramatu at sdl dot hitachi dot co dot jp @ 2006-01-25 11:48 UTC (permalink / raw)
To: systemtap
How reproducible:
Always
Steps to reproduce:
Run stap with the script below:
--
function testfunc () %{
// no end brace
--
Then the stap command falls into infinite loop, after a while it hangs up.
Cause of the probrem:
Parser fails to check the EOF while parsing the embedded C code.
Solutions:
I think fix "EOF" check code at parse.cxx:600, as below.
- if (c == 0) // EOF
+ if (c < 0) // EOF
--
Summary: Systemtap parser will fall into infinite loop.
Product: systemtap
Version: unspecified
Status: NEW
Severity: critical
Priority: P2
Component: translator
AssignedTo: systemtap at sources dot redhat dot com
ReportedBy: hiramatu at sdl dot hitachi dot co dot jp
http://sourceware.org/bugzilla/show_bug.cgi?id=2205
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* [Bug translator/2205] Systemtap parser will fall into infinite loop.
2006-01-25 11:48 [Bug translator/2205] New: Systemtap parser will fall into infinite loop hiramatu at sdl dot hitachi dot co dot jp
@ 2006-01-25 15:01 ` fche at redhat dot com
2006-02-01 20:40 ` fche at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fche at redhat dot com @ 2006-01-25 15:01 UTC (permalink / raw)
To: systemtap
------- Additional Comments From fche at redhat dot com 2006-01-25 15:01 -------
Patch applied. Please feel free to test & commit such fixes yourself in the future.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://sourceware.org/bugzilla/show_bug.cgi?id=2205
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* [Bug translator/2205] Systemtap parser will fall into infinite loop.
2006-01-25 11:48 [Bug translator/2205] New: Systemtap parser will fall into infinite loop hiramatu at sdl dot hitachi dot co dot jp
2006-01-25 15:01 ` [Bug translator/2205] " fche at redhat dot com
@ 2006-02-01 20:40 ` fche at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: fche at redhat dot com @ 2006-02-01 20:40 UTC (permalink / raw)
To: systemtap
------- Additional Comments From fche at redhat dot com 2006-02-01 20:40 -------
By the way, labeling bugs like this one as "critical" is not really appropriate.
The translator hanging on input with guru-mode syntax errors is not that
severe/important a problem.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2205
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2006-01-25 11:48 [Bug translator/2205] New: Systemtap parser will fall into infinite loop hiramatu at sdl dot hitachi dot co dot jp
2006-01-25 15:01 ` [Bug translator/2205] " fche at redhat dot com
2006-02-01 20:40 ` fche at redhat dot com
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