New Features in Dyninst 5'1

1
New Features in Dyninst 5.1

• Matthew LeGendre
• Ray Chen

2
A Busy Year

• July 6, 2006 Dyninst 5.0
• AMD64 Support
• Threaded Event Handling
• New fine-grained instrumentation system
• . . .
• Sep 22, 2006 Dyninst 5.0.1
• Intel and Portland compiler support on AMD64
• Bug Fixes
• May 2007 Dyninst 5.1

3
Paradyn/Dyninst 5.1

• Dyninst 5.1
• SymtabAPI
• Testsuite
• Performance Optimizations
• Catch-up
• Paradyn 5.1
• Paradyn as a Dyninst Client

4
The SymtabAPI

• A library for parsing symbol information in
  binaries.
• You dont need to understand binary formats
• Cross-platform ELF, COFF, XCOFF, PE
• Allows updating of binaries, write-back for ELF
  and XCOFF
• XML Export
• The first part in the DyninstAPI split

5
The Testsuite

• Splits Dyninsts monolithic tests with
  micro-tests.
• Better test coverage and easier to use
• Runs a cross product of tests, compilers,
  mutatees, and dyninst run modes

./runTests test1_1 mutatee test1.mutatee_gcc
create_mode create result PASSED test1_1
mutatee test1.mutatee_gcc create_mode attach
result PASSED test1_1 mutatee
test1.mutatee_g create_mode create result
PASSED test1_1 mutatee test1.mutatee_g
create_mode attach result PASSED test1_1
mutatee test1.mutatee_g77 create_mode create
result PASSED test1_1 mutatee
test1.mutatee_g77 create_mode attach result
PASSED
6
Performance Optimizations

• Generate efficient instrumentation
• Turn of instrumentation components you dont need.

mov 0x8049630,eax mov eax,0xfffffffc(ebp)
addl 0x1,0xfffffffc(ebp) mov
0xfffffffc(ebp),eax
incl 0x8049630
7
Catch-Up

• Use finalizeInsertionSetWithCatchup to insert
  instrumentation with Catch-up

int foo() printf(doing work) do_work()
return 0
8
Paradyn/Dyninst Split

• Paradyn is now a proper client of Dyninst.

Paradyn
Dyninst
9
Many, Many Other Features

• DWARF support on Solaris
• New Dyninst manual
• Shared memory library as a value added library
• Memory Modification
• New machine support
• Bug fixes

10
Undocumented Feature

• Debugging Dyninst
• Ever had a problem with Dyninst?
• Cant use Dyninst on Dyninst
• Limited support for C
• 19 Environment Variables
• Dyninst checks for these at start
• Strategic printf()s at milestones in code
• Output to stderr

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Debugging Environment Variables

• Startup
• DYNINST_DEBUG_STARTUP
• DYNINST_DEBUG_PARSE
• DYNINST_DEBUG_DWARF
• Process Control
• DYNINST_DEBUG_PROCCONTROL
• DYNINST_DEBUG_FORKEXEC

12
Debugging Environment Variables

• Dyninst Internal Threads
• DYNINST_DEBUG_THREAD
• DYNINST_DEBUG_MUTEX
• DYNINST_DEBUG_MAILBOX
• Mutatee Handling
• DYNINST_DEBUG_INFRPC
• DYNINST_DEBUG_STACKWALK
• DYNINST_DEBUG_DYN_UNW
• DYNINST_DEBUG_WRITE

13
Debugging Environment Variables

• Instrumentation
• DYNINST_DEBUG_INST
• DYNINST_DEBUG_RELOC
• DYNINST_DEBUG_AST
• DYNINST_DEBUG_REGALLOC
• DYNINST_DEBUG_CATCHUP
• Miscellaneous
• DYNINST_DEBUG_DBI
• DYNINST_DEBUG_BPATCH

14
Example Use

• gt
• gt ./parseThat /bin/ls
• Dyninst mutator terminated via signal 11.
• Core file generated.

15
Example Use

• gt setenv DYNINST_DEBUG_STARTUP
• gt ./parseThat /bin/ls
• ltsnipgt
• UIprocess.C2461 Waiting for
• bootstrapped state...
• UIprocess.C2632 state bootstrapped
• Getting initial thread...
• Creating new BPatch_image...
• BPatch_processBPatch_process, completed.
• Dyninst mutator terminated via signal 11.
• Core file generated.

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Example Use
gt setenv DYNINST_DEBUG_BPATCH gt ./parseThat
/bin/ls ltsnipgt UI Calling char
getNameInt()... UI Finished call
getNameInt UI Calling getProceduresInt()... UI
Finished call getProceduresInt UI Calling
char getNameBuffer()... UI Finished call
getNameBuffer UI Calling void
BPatch_arithExprUn() Dyninst mutator terminated
via signal 11. Core file generated.
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Output

• Dont expect to understand output
• Intended for DyninstAPI developer or advanced
  user
• Expect us to request output from you
• Makes remote debugging sessions easier