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shamon's Introduction

Shamon

A library and a set of tools for monitoring heterogeneous asynchronous events sources. Events are efficiently transferred via concurrent buffers in the shared memory.

Configuring

# simple configuration
cmake . -DCMAKE_C_COMPILER=clang

# configuration without dynamorio sources
cmake . -DCMAKE_C_COMPILER=clang -DDYNAMORIO_SOURCES=OFF

Note that using clang is not compulsory, but some helper scripts (e.g., sources/tsan/compiler.py) rely on that and there is a risk that these scripts will not work in the release build if the library is not compiled with clang. A work-around, if needed, is turning of interprocedural optimizations (IPO) in cmake (use -DENABLE_IPO=OFF while configuring).

shamon's People

Contributors

mchalupa avatar fabianmuehlboeck avatar smml1996 avatar

Watchers

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shamon's Issues

Generate figures for experiments

The scripts that we used to generate experiments are in the paper. We should take them and adjust for the artifact. I'd put them into a folder on a level of shamon (not inside shamon repo, it is polluted with clutter enough).

  • scalability
  • primes
  • primes tessla
  • bank
  • bank tessla
  • dataraces (#11 )

compiler is broken

After the last pushed fix to the compiler, I'm getting this if I try to compile the monitor for data races:

monitor.c: In function ‘RULE_SET_default’:
monitor.c:1759:9: error: ‘count_Program’ undeclared (first use in this function)
 1759 |         count_Program = shm_arbiter_buffer_peek(
      |         ^~~~~~~~~~~~~
monitor.c:1759:9: note: each undeclared identifier is reported only once for each function it appears in
monitor.c:1760:42: error: ‘e1_Program’ undeclared (first use in this function)
 1760 |             BUFFER_Program, 5, (void **)&e1_Program, &i1_Program,
      |                                          ^~~~~~~~~~
monitor.c:1760:55: error: ‘i1_Program’ undeclared (first use in this function)
 1760 |             BUFFER_Program, 5, (void **)&e1_Program, &i1_Program,
      |                                                       ^~~~~~~~~~
monitor.c:1761:23: error: ‘e2_Program’ undeclared (first use in this function)
 1761 |             (void **)&e2_Program, &i2_Program);
      |                       ^~~~~~~~~~
monitor.c:1761:36: error: ‘i2_Program’ undeclared (first use in this function)
 1761 |             (void **)&e2_Program, &i2_Program);
      |                                    ^~~~~~~~~~
monitor.c:1783:8: warning: missing terminating " character
 1783 | printf("***** BUFFER GROUPS *****
      |        ^
monitor.c:1783:8: error: missing terminating " character
 1783 | printf("***** BUFFER GROUPS *****
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~
monitor.c:1784:1: warning: missing terminating " character
 1784 | ")
      | ^
monitor.c:1784:1: error: missing terminating " character
 1784 | ")
      | ^~
monitor.c:1785:8: warning: missing terminating " character
 1785 | printf("***** Threads *****
      |        ^
monitor.c:1785:8: error: missing terminating " character
 1785 | printf("***** Threads *****
      |        ^~~~~~~~~~~~~~~~~~~~
monitor.c:1786:1: warning: missing terminating " character
 1786 | ")dll_node *current = BG_Threads.head;
      | ^
monitor.c:1786:1: error: missing terminating " character
 1786 | ")dll_node *current = BG_Threads.head;
      | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
monitor.c:1787:1: error: expected expression before ‘{’ token
 1787 | {
      | ^
monitor.c:1790:24: warning: character constant too long for its type
 1790 |                 printf('Threads[%d].ARGS{', i);
      |                        ^~~~~~~~~~~~~~~~~~~
monitor.c:1792:24: warning: multi-character character constant [-Wmultichar]
 1792 |                 printf('}\n');
      |                        ^~~~~
monitor.c:1800:24: warning: character constant too long for its type
 1800 |                 printf('Threads[%d].buffer{\n', i);
      |                        ^~~~~~~~~~~~~~~~~~~~~~~
monitor.c:1803:24: warning: multi-character character constant [-Wmultichar]
 1803 |                 printf('}\n');
      |                        ^~~~~
monitor.c:1807:87: error: expected ‘)’ before ‘}’ token
 1807 | }fprintf(stderr, "Seems all rules are waiting for some events that are not coming\n");
      |                                                                                       ^
      |                                                                                       )
 1808 |     }
      |     ~                                                                                  
monitor.c:1783:7: note: to match this ‘(’
 1783 | printf("***** BUFFER GROUPS *****
      |       ^
monitor.c:1807:87: error: expected ‘;’ before ‘}’ token
 1807 | }fprintf(stderr, "Seems all rules are waiting for some events that are not coming\n");
      |                                                                                       ^
      |                                                                                       ;
 1808 |     }
      |     ~                                                                                  
make: *** [Makefile:22: monitor] Error 1

How to reproduce:

cd experiments/dataraces
make

Filter buffer groups while choosing them

Right now, the generated code does this when checking a rule:

update_bg(...)
chosen = bg_get_first_n(..., N)
foreach bg in chosen {
  if (bg matches the 'where' condition) {
    // check rules  
  }
}

That means that we can actually check less than N buffers (even no buffer) event though there can be more than N buffers matching (but they are not among the first N buffers in the current order). The where condition should be checked when getting the first N buffers -- in bg_get_first_n or generate the code instead of calling this function.

Create a docker artifact

Two reasons:

  • DynamoRIO does not work on FASE's VM
  • Running in VM is inefficient, we cannot hope to reproduce the numbers in VM

So to have some artifact that people can actually use, add a docker artifact. It should be easy enough as we have all the pieces.

Bundle packeges that are need for plots

requirements.txt:

contourpy==1.0.5
cycler==0.11.0
fonttools==4.37.3
kiwisolver==1.4.4
matplotlib==3.6.0
numpy==1.23.3
packaging==21.3
pandas==1.5.0
Pillow==9.2.0
pyparsing==3.0.9
python-dateutil==2.8.2
pytz==2022.2.1
seaborn==0.12.0
six==1.16.0

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