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Changed d-scripts and processing logic to only trace malloc/free/realloc/calloc and abandoned tracing new/delete
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| for REP in 1 2 3 4 5; do | ||
| for SLTIME in 10 20 40 ; do | ||
| echo tracing process:$1 for :$SLTIME seconds. Repetition:$REP | ||
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| ./trace-memalloc.d $1 > ./trace-memalloc.$SLTIME.$REP & | ||
| dtracepid=$! | ||
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| echo started dtrace process, pid:$dtracepid | ||
| sleep $SLTIME | ||
| kill -SIGINT $dtracepid | ||
| echo sent interrupt signal to dtrace process | ||
| wait $dtracepid | ||
| echo dtrace finished | ||
| done | ||
| done |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| for REP in 1 2 3 4 5; do | ||
| for SLTIME in 0010 0020 0040 0080 0160 0320 0640 1280 2560; do | ||
| echo tracing process:$1 for :$SLTIME seconds. Repetition:$REP | ||
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| ./trace-memalloc-proc.d $1 > ./trace-memalloc-proc.$SLTIME.$REP & | ||
| dtracepid=$! | ||
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| echo started dtrace process, pid:$dtracepid | ||
| sleep $SLTIME | ||
| kill -SIGINT $dtracepid | ||
| echo sent interrupt signal to dtrace process | ||
| wait $dtracepid | ||
| echo dtrace finished | ||
| done | ||
| done |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| #!/usr/sbin/dtrace -s | ||
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| /* | ||
| * Dtrace script that logs the number of times call stacks allocated or freed memory | ||
| * The output of the script is further processed as described in | ||
| * https://github.com/ppissias/DTLeakAnalyzer | ||
| * | ||
| * Adapt the aggsize, aggsize and bufsize parameters accordingly if needed. | ||
| * Author Petros Pissias | ||
| */ | ||
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| #pragma D option quiet | ||
| #pragma D option aggrate=100us | ||
| #pragma D option aggsize=100m | ||
| #pragma D option bufpolicy=fill | ||
| #pragma D option bufsize=100m | ||
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| #!/usr/sbin/dtrace -s | ||
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| pid$1::malloc:entry | ||
| { | ||
| self->trace = 1; | ||
| self->size = arg0; | ||
| } | ||
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| pid$1::malloc:return | ||
| /self->trace == 1/ | ||
| { | ||
| @allocstacks[ustack(50)] = count(); | ||
| @counts["created"] = count(); | ||
| counts["pending"]++; | ||
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| self->trace = 0; | ||
| self->size = 0; | ||
| } | ||
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| pid$1::realloc:entry | ||
| { | ||
| self->trace = 1; | ||
| self->size = arg1; | ||
| self->oldptr = arg0; | ||
| } | ||
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| pid$1::realloc:return | ||
| / (self->trace == 1) && (self->size == 0)/ | ||
| { | ||
| /* this is same as free, size=0 */ | ||
| @deallocstacks[ustack(50)] = count(); | ||
| @counts["deleted"] = count(); | ||
| counts["pending"]--; | ||
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| self->trace = 0; | ||
| self->size = 0; | ||
| self->oldptr = 0; | ||
| } | ||
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| pid$1::realloc:return | ||
| / (self->trace == 1) && (self->size > 0)/ | ||
| { | ||
| /* this is a deallocation and a new allocation */ | ||
| @deallocstacks[ustack(50)] = count(); | ||
| @allocstacks[ustack(50)] = count(); | ||
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| self->trace = 0; | ||
| self->size = 0; | ||
| self->oldptr = 0; | ||
| } | ||
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| pid$1::calloc:entry | ||
| { | ||
| self->trace = 1; | ||
| self->size = arg1; | ||
| self->nelements = arg0; | ||
| } | ||
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| pid$1::calloc:return | ||
| /self->trace == 1/ | ||
| { | ||
| /* log the memory allocation */ | ||
| @allocstacks[ustack(50)] = count(); | ||
| @counts["created"] = count(); | ||
| counts["pending"]++; | ||
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| self->trace = 0; | ||
| self->size = 0; | ||
| self->nelements = 0; | ||
| } | ||
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| pid$1::free:entry | ||
| { | ||
| @deallocstacks[ustack(50)] = count(); | ||
| @counts["deleted"] = count(); | ||
| counts["pending"]--; | ||
| } | ||
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| END | ||
| { | ||
| printf("== FINISHED ==\n\n"); | ||
| printf("== allocation stacks ==\n\n"); | ||
| printa(@allocstacks); | ||
| printf("\n== deallocation stacks ==\n\n"); | ||
| printa(@deallocstacks); | ||
| printf("\n== mem allocations vs deletions ==\n\n"); | ||
| printa(@counts); | ||
| printf("number of allocations - number of deallocations: %d",counts["pending"]); | ||
| } |
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