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Bug 1134030 - Add WindowsAddressSpaceReporter. code=njn,dmajor. r=dmajor,njn.

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This commit is contained in:
Nicholas Nethercote 2015-02-20 13:13:16 +11:00
parent ccc9d87ea3
commit 957050271d
1 changed files with 155 additions and 0 deletions
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155
xpcom/base/nsMemoryReporterManager.cpp
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@ -544,6 +544,157 @@ PrivateDistinguishedAmount(int64_t* aN)
*aN = pmcex.PrivateUsage;
return NS_OK;
}
class WindowsAddressSpaceReporter MOZ_FINAL : public nsIMemoryReporter
{
~WindowsAddressSpaceReporter() {}
public:
NS_DECL_ISUPPORTS
NS_METHOD CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData, bool aAnonymize) MOZ_OVERRIDE
{
MEMORY_BASIC_INFORMATION info = { 0 };
bool isPrevSegStackGuard = false;
for (size_t currentAddress = 0; ; ) {
if (!VirtualQuery((LPCVOID)currentAddress, &info, sizeof(info))) {
// Something went wrong, just return whatever we've got already.
break;
}
size_t size = info.RegionSize;
// For each range of pages, we consider one or more of its State, Type
// and Protect values. These are documented at
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366775%28v=vs.85%29.aspx
// (for State and Type) and
// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366786%28v=vs.85%29.aspx
// (for Protect).
//
// Not all State values have accompanying Type and Protection values.
bool doType = false;
bool doProtect = false;
nsCString path("address-space");
switch (info.State) {
case MEM_FREE:
path.AppendLiteral("/free");
break;
case MEM_RESERVE:
path.AppendLiteral("/reserved");
doType = true;
break;
case MEM_COMMIT:
path.AppendLiteral("/commit");
doType = true;
doProtect = true;
break;
default:
// Should be impossible, but handle it just in case.
path.AppendLiteral("/???");
break;
}
if (doType) {
switch (info.Type) {
case MEM_IMAGE:
path.AppendLiteral("/image");
break;
case MEM_MAPPED:
path.AppendLiteral("/mapped");
break;
case MEM_PRIVATE:
path.AppendLiteral("/private");
break;
default:
// Should be impossible, but handle it just in case.
path.AppendLiteral("/???");
break;
}
}
if (doProtect) {
// Basic attributes. Exactly one of these should be set.
if (info.Protect & PAGE_EXECUTE) {
path.AppendLiteral("/execute");
}
if (info.Protect & PAGE_EXECUTE_READ) {
path.AppendLiteral("/execute-read");
}
if (info.Protect & PAGE_EXECUTE_READWRITE) {
path.AppendLiteral("/execute-readwrite");
}
if (info.Protect & PAGE_EXECUTE_WRITECOPY) {
path.AppendLiteral("/execute-writecopy");
}
if (info.Protect & PAGE_NOACCESS) {
path.AppendLiteral("/noaccess");
}
if (info.Protect & PAGE_READONLY) {
path.AppendLiteral("/readonly");
}
if (info.Protect & PAGE_READWRITE) {
path.AppendLiteral("/readwrite");
}
if (info.Protect & PAGE_WRITECOPY) {
path.AppendLiteral("/writecopy");
}
// Modifiers. At most one of these should be set.
if (info.Protect & PAGE_GUARD) {
path.AppendLiteral("+guard");
}
if (info.Protect & PAGE_NOCACHE) {
path.AppendLiteral("+nocache");
}
if (info.Protect & PAGE_WRITECOMBINE) {
path.AppendLiteral("+writecombine");
}
// Annotate likely stack segments, too.
if (isPrevSegStackGuard &&
info.State == MEM_COMMIT &&
doType && info.Type == MEM_PRIVATE &&
doProtect && info.Protect == PAGE_READWRITE) {
path.AppendLiteral(" (stack)");
}
}
isPrevSegStackGuard =
info.State == MEM_COMMIT &&
doType && info.Type == MEM_PRIVATE &&
doProtect && info.Protect == (PAGE_READWRITE|PAGE_GUARD);
nsresult rv;
rv = aHandleReport->Callback(
EmptyCString(), path, KIND_OTHER, UNITS_BYTES, size,
NS_LITERAL_CSTRING("From MEMORY_BASIC_INFORMATION."), aData);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
size_t lastAddress = currentAddress;
currentAddress += size;
// If we overflow, we've examined all of the address space.
if (currentAddress < lastAddress) {
break;
}
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(WindowsAddressSpaceReporter, nsIMemoryReporter)
#endif // XP_<PLATFORM>
#ifdef HAVE_VSIZE_MAX_CONTIGUOUS_REPORTER
@ -1026,6 +1177,10 @@ nsMemoryReporterManager::Init()
RegisterStrongReporter(new mozilla::dmd::DMDReporter());
#endif
#ifdef XP_WIN
RegisterStrongReporter(new WindowsAddressSpaceReporter());
#endif
#ifdef XP_UNIX
nsMemoryInfoDumper::Initialize();
#endif