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rnkrnk
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Initial commit of CGO tutorial demo 1 code.
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‎CMakeLists.txt

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# **********************************************************
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# Copyright (c) 2012 Google, Inc. All rights reserved.
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# **********************************************************
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cmake_minimum_required(VERSION 2.6)
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project(countingexample)
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# Boiler plate to find DynamoRIO. Invoke cmake like this to configure:
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# cmake . -DDynamoRIO_DIR=DynamoRIO-Windows-3.2.0-3/cmake
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if (NOT DEFINED DynamoRIO_DIR)
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set(DynamoRIO_DIR "${PROJECT_SOURCE_DIR}/../cmake" CACHE PATH
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"DynamoRIO installation's cmake directory")
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endif (NOT DEFINED DynamoRIO_DIR)
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find_package(DynamoRIO 3.1)
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if (NOT DynamoRIO_FOUND)
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message(FATAL_ERROR "DynamoRIO package required to build")
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endif(NOT DynamoRIO_FOUND)
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# Make some shared library CMake targets and configure them to be DR clients.
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add_library(bbcount SHARED bbcount.c)
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configure_DynamoRIO_client(bbcount)
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add_library(tracecount SHARED tracecount.c)
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configure_DynamoRIO_client(tracecount)

‎bbcount.c

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/* **********************************************************
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* Copyright (c) 2012 Google, Inc. All rights reserved.
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* **********************************************************/
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/* Basic block count. */
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#include "dr_api.h"
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/* Forward decls. */
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static void event_exit(void);
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static dr_emit_flags_t
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event_basic_block(void *drcontext, void *tag,
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instrlist_t *bb, bool for_trace,
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bool translating);
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/* Exported entry point. */
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DR_EXPORT void
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dr_init(client_id_t id)
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{
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/* Can't use libc printf: conflict with app! */
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dr_printf("Client 'bbcount' initializing\n");
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/* Register events. */
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dr_register_bb_event(event_basic_block);
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dr_register_exit_event(event_exit);
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}
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/************************************************************
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* Basic block counting.
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*/
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static uint bbs_instrumented;
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static uint bbs_executed;
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/* Basic block execution callback, aka Pin's "analysis" callback. */
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static void bb_count(void) { bbs_executed++; }
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/* Basic block instrumentation callback. */
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static dr_emit_flags_t
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event_basic_block(void *drcontext, void *tag, instrlist_t *bb,
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bool for_trace, bool translating)
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{
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/* bb event called again for tracing and translating, don't count those. */
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if (!for_trace && !translating)
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bbs_instrumented++;
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dr_insert_clean_call(drcontext, bb, instrlist_first(bb),
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(void *)bb_count, false/*fpstate*/, 0/*num args*/);
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return DR_EMIT_DEFAULT;
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}
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static void
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event_exit(void)
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{
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dr_messagebox("Instrumentation results:\n"
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"%10u bbs instrumented\n"
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"%10u bbs executed\n",
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bbs_instrumented,
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bbs_executed);
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}

‎cgo_example.txt

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TODO: practice on Windows laptop
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- Download Windows zip package
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- unzip and chmod
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- Plain DR usage:
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- drrun ls
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- drrun calc
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- drrun -debug -loglevel 3 ls
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- search "interp: start" to see app code
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- speed run: drrun bzip2 ls.exe log (~3 MB)
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- if time, compress thread log (~27 MB)
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- Developing a client:
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- open CMakeLists.txt
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- open bbcount.c in Vim
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- dr_init entry point, registers events, can't use libc (much)
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- event_basic_block, instrumentation vs. execution
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- event_exit, use results
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- open tracecount.c in Vim
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- ditto

‎tracecount.c

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/* **********************************************************
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* Copyright (c) 2012 Google, Inc. All rights reserved.
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* **********************************************************/
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/* Trace and basic block count. */
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#include "dr_api.h"
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/* Forward decls. */
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static void event_exit(void);
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static dr_emit_flags_t
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event_basic_block(void *drcontext, void *tag,
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instrlist_t *bb, bool for_trace,
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bool translating);
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static dr_emit_flags_t
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event_trace(void *drcontext, void *tag, instrlist_t *trace,
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bool translating);
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/* Exported entry point. */
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DR_EXPORT void
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dr_init(client_id_t id)
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{
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/* Can't use libc printf: conflict with app! */
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dr_printf("Client 'bbcount' initializing\n");
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/* Register events. */
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dr_register_bb_event(event_basic_block);
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dr_register_trace_event(event_trace);
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dr_register_exit_event(event_exit);
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}
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/************************************************************
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* Basic block counting.
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*/
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static uint bbs_instrumented;
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static uint bbs_executed;
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/* Basic block execution callback, aka Pin's "analysis" callback. */
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static void bb_count(void) { bbs_executed++; }
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/* Basic block instrumentation callback. */
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static dr_emit_flags_t
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event_basic_block(void *drcontext, void *tag, instrlist_t *bb,
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bool for_trace, bool translating)
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{
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/* bb event called again for tracing and translating, don't count those. */
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if (!for_trace && !translating)
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bbs_instrumented++;
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if (!for_trace)
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dr_insert_clean_call(drcontext, bb, instrlist_first(bb),
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(void *)bb_count, false/*fpstate*/, 0/*num args*/);
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return DR_EMIT_DEFAULT;
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}
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/************************************************************
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* Trace counting.
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*/
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static uint traces_instrumented;
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static uint traces_executed;
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/* Trace execution callback, aka Pin's "analysis" callback. */
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static void trace_count(void) { traces_executed++; }
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/* Trace instrumentation callback. */
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static dr_emit_flags_t
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event_trace(void *drcontext, void *tag, instrlist_t *trace, bool translating)
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{
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/* trace event called again for translating, don't count those. */
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if (!translating)
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traces_instrumented++;
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dr_insert_clean_call(drcontext, trace, instrlist_first(trace),
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(void *)trace_count, false/*fpstate*/, 0/*num args*/);
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return DR_EMIT_DEFAULT;
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}
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static void
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event_exit(void)
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{
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dr_messagebox("Instrumentation results:\n"
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"%10u bbs instrumented\n"
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"%10u bbs executed\n"
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"%10u traces instrumented\n"
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"%10u traces executed\n",
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bbs_instrumented,
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bbs_executed,
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traces_instrumented,
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traces_executed);
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}

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