mirror of
https://github.com/mozilla/gecko-dev.git
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r=dp; implement some macros to help track memory leaks
This commit is contained in:
kipp%netscape.com
parent
a5969c2c3f
commit
9b78e0fd9d
@ -17,8 +17,10 @@
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsISupports.h"
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#include "nsVoidArray.h"
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#include "prprf.h"
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#include "prlog.h"
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#include "plstr.h"
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#if defined(_WIN32)
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#include <windows.h>
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@ -542,3 +544,99 @@ nsTraceRefcnt::DemangleSymbol(const char * aSymbol,
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}
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#endif // __linux__
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//----------------------------------------------------------------------
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#ifdef DEBUG
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struct CtorEntry {
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const char* type;
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mozCtorDtorCounter* counter;
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};
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nsVoidArray* nsTraceRefcnt::mCtors;
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void
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nsTraceRefcnt::RegisterCtor(const char* aType,
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mozCtorDtorCounter* aCounterAddr)
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{
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if (!mCtors) {
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mCtors = new nsVoidArray();
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if (!mCtors) {
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return;
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}
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}
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CtorEntry* e = new CtorEntry();
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if (!e) {
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return;
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}
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e->type = aType;
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e->counter = aCounterAddr;
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mCtors->AppendElement(e);
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}
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void
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nsTraceRefcnt::UnregisterCtor(const char* aType)
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{
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if (mCtors) {
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PRInt32 i, n = mCtors->Count();
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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if (0 == PL_strcmp(e->type, aType)) {
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delete e;
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mCtors->RemoveElementAt(i);
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break;
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}
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}
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}
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}
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void
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nsTraceRefcnt::DumpLeaks(FILE* out)
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{
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if (mCtors) {
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PRBool haveLeaks = PR_FALSE;
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PRInt32 i, n = mCtors->Count();
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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if (e) {
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mozCtorDtorCounter* cdc = e->counter;
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if (cdc) {
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if (cdc->ctors != cdc->dtors) {
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haveLeaks = PR_TRUE;
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break;
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}
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}
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}
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}
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if (haveLeaks) {
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fprintf(out, "*** There are memory leaks:\n");
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fprintf(out, "%-40s %-15s %s\n", "Type", "# created", "# leaked");
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fprintf(out, "%-40s %-15s %s\n", "----", "---------", "--------");
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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if (e && e->counter) {
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mozCtorDtorCounter* cdc = e->counter;
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if (cdc->ctors != cdc->dtors) {
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fprintf(out, "%-40s %-15d %d\n", e->type, cdc->ctors,
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cdc->ctors - cdc->dtors);
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}
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}
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}
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}
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}
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}
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void
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nsTraceRefcnt::FlushCtorRegistry(void)
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{
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if (mCtors) {
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PRInt32 i, n = mCtors->Count();
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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delete e;
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}
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delete mCtors;
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}
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}
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#endif /* DEBUG */
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@ -20,6 +20,16 @@
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#define nsTraceRefcnt_h___
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#include "nsCom.h"
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#include <stdio.h>
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class nsVoidArray;
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#ifdef DEBUG
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struct mozCtorDtorCounter {
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PRInt32 ctors;
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PRInt32 dtors;
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};
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#endif
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/**
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* This class is used to support tracing (and logging using nspr) of
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@ -71,6 +81,63 @@ public:
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const char* aFile,
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int aLine);
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#ifdef DEBUG
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/**
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* Register a constructor with the xpcom library. This records the
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* type name and the address of the counter so that later on when
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* DumpLeaks is called, we can print out those objects ctors whose
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* counter is not zero (the ones that have live object references
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* still out there)
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*/
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static NS_COM void RegisterCtor(const char* aType,
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mozCtorDtorCounter* aCounterAddr);
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static NS_COM void UnregisterCtor(const char* aType);
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/**
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* Dump the leaking constructors out.
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*/
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static NS_COM void DumpLeaks(FILE* out);
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/**
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* Erase the ctor registration data.
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*/
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static NS_COM void FlushCtorRegistry(void);
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#endif
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protected:
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#ifdef DEBUG
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static nsVoidArray* mCtors;
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#endif
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};
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//----------------------------------------------------------------------
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#ifdef DEBUG
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#define MOZ_DECL_CTOR(_type) \
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static mozCtorDtorCounter gCounter_##_type
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#define MOZ_CTOR(_type) \
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PR_BEGIN_MACRO \
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if (0 == gCounter_##_type . ctors) { \
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nsTraceRefcnt::RegisterCtor(#_type, &gCounter_##_type); \
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} \
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gCounter_##_type . ctors++; \
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PR_END_MACRO
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#define MOZ_DTOR(_type) \
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PR_BEGIN_MACRO \
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gCounter_##_type . dtors ++; \
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PR_END_MACRO
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#else
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#define MOZ_REG_CTOR(_type,_counter)
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#define MOZ_DECL_CTOR_(type)
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#define MOZ_CTOR(_type)
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#define MOZ_DTOR(_type)
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#endif /* DEBUG */
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#endif /* nsTraceRefcnt_h___ */
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@ -17,8 +17,10 @@
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsISupports.h"
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#include "nsVoidArray.h"
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#include "prprf.h"
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#include "prlog.h"
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#include "plstr.h"
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#if defined(_WIN32)
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#include <windows.h>
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@ -542,3 +544,99 @@ nsTraceRefcnt::DemangleSymbol(const char * aSymbol,
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}
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#endif // __linux__
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//----------------------------------------------------------------------
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#ifdef DEBUG
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struct CtorEntry {
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const char* type;
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mozCtorDtorCounter* counter;
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};
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nsVoidArray* nsTraceRefcnt::mCtors;
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void
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nsTraceRefcnt::RegisterCtor(const char* aType,
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mozCtorDtorCounter* aCounterAddr)
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{
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if (!mCtors) {
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mCtors = new nsVoidArray();
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if (!mCtors) {
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return;
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}
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}
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CtorEntry* e = new CtorEntry();
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if (!e) {
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return;
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}
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e->type = aType;
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e->counter = aCounterAddr;
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mCtors->AppendElement(e);
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}
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void
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nsTraceRefcnt::UnregisterCtor(const char* aType)
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{
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if (mCtors) {
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PRInt32 i, n = mCtors->Count();
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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if (0 == PL_strcmp(e->type, aType)) {
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delete e;
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mCtors->RemoveElementAt(i);
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break;
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}
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}
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}
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}
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void
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nsTraceRefcnt::DumpLeaks(FILE* out)
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{
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if (mCtors) {
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PRBool haveLeaks = PR_FALSE;
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PRInt32 i, n = mCtors->Count();
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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if (e) {
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mozCtorDtorCounter* cdc = e->counter;
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if (cdc) {
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if (cdc->ctors != cdc->dtors) {
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haveLeaks = PR_TRUE;
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break;
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}
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}
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}
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}
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if (haveLeaks) {
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fprintf(out, "*** There are memory leaks:\n");
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fprintf(out, "%-40s %-15s %s\n", "Type", "# created", "# leaked");
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fprintf(out, "%-40s %-15s %s\n", "----", "---------", "--------");
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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if (e && e->counter) {
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mozCtorDtorCounter* cdc = e->counter;
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if (cdc->ctors != cdc->dtors) {
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fprintf(out, "%-40s %-15d %d\n", e->type, cdc->ctors,
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cdc->ctors - cdc->dtors);
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}
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}
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}
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}
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}
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}
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void
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nsTraceRefcnt::FlushCtorRegistry(void)
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{
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if (mCtors) {
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PRInt32 i, n = mCtors->Count();
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for (i = 0; i < n; i++) {
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CtorEntry* e = (CtorEntry*) mCtors->ElementAt(i);
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delete e;
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}
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delete mCtors;
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}
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}
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#endif /* DEBUG */
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@ -20,6 +20,16 @@
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#define nsTraceRefcnt_h___
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#include "nsCom.h"
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#include <stdio.h>
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class nsVoidArray;
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#ifdef DEBUG
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struct mozCtorDtorCounter {
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PRInt32 ctors;
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PRInt32 dtors;
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};
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#endif
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/**
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* This class is used to support tracing (and logging using nspr) of
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@ -71,6 +81,63 @@ public:
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const char* aFile,
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int aLine);
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#ifdef DEBUG
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/**
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* Register a constructor with the xpcom library. This records the
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* type name and the address of the counter so that later on when
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* DumpLeaks is called, we can print out those objects ctors whose
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* counter is not zero (the ones that have live object references
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* still out there)
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*/
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static NS_COM void RegisterCtor(const char* aType,
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mozCtorDtorCounter* aCounterAddr);
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static NS_COM void UnregisterCtor(const char* aType);
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/**
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* Dump the leaking constructors out.
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*/
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static NS_COM void DumpLeaks(FILE* out);
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/**
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* Erase the ctor registration data.
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*/
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static NS_COM void FlushCtorRegistry(void);
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#endif
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protected:
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#ifdef DEBUG
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static nsVoidArray* mCtors;
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#endif
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};
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//----------------------------------------------------------------------
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#ifdef DEBUG
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#define MOZ_DECL_CTOR(_type) \
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static mozCtorDtorCounter gCounter_##_type
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#define MOZ_CTOR(_type) \
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PR_BEGIN_MACRO \
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if (0 == gCounter_##_type . ctors) { \
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nsTraceRefcnt::RegisterCtor(#_type, &gCounter_##_type); \
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} \
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gCounter_##_type . ctors++; \
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PR_END_MACRO
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#define MOZ_DTOR(_type) \
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PR_BEGIN_MACRO \
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gCounter_##_type . dtors ++; \
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PR_END_MACRO
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#else
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#define MOZ_REG_CTOR(_type,_counter)
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#define MOZ_DECL_CTOR_(type)
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#define MOZ_CTOR(_type)
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#define MOZ_DTOR(_type)
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#endif /* DEBUG */
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#endif /* nsTraceRefcnt_h___ */
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