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Bug 1190483 - Add a way to record a DMD log late in shutdown. r=erahm

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This commit is contained in:
Andrew McCreight 2015-08-14 10:00:04 -07:00
parent e95712e3b4
commit 36dad8e996
1 changed files with 38 additions and 0 deletions
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38
xpcom/base/nsTraceRefcnt.cpp
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@ -40,6 +40,11 @@
#include <dlfcn.h>
#endif
#ifdef MOZ_DMD
#include "base/process_util.h"
#include "nsMemoryInfoDumper.h"
#endif
////////////////////////////////////////////////////////////////////////////////
#define NS_IMPL_REFCNT_LOGGING
@ -945,6 +950,35 @@ NS_LogTerm()
mozilla::LogTerm();
}
#ifdef MOZ_DMD
// If MOZ_DMD_SHUTDOWN_LOG is set, dump a DMD report to a file.
// The value of this environment variable is used as the prefix
// of the file name, so you probably want something like "/tmp/".
// By default, this is run in all processes, but you can record a
// log only for a specific process type by setting MOZ_DMD_LOG_PROCESS
// to the process type you want to log, such as "default" or "tab".
// This method can't use the higher level XPCOM file utilities
// because it is run very late in shutdown to avoid recording
// information about refcount logging entries.
static void
LogDMDFile()
{
const char* dmdFilePrefix = PR_GetEnv("MOZ_DMD_SHUTDOWN_LOG");
if (!dmdFilePrefix) {
return;
}
const char* logProcessEnv = PR_GetEnv("MOZ_DMD_LOG_PROCESS");
if (logProcessEnv && !!strcmp(logProcessEnv, XRE_ChildProcessTypeToString(XRE_GetProcessType()))) {
return;
}
nsPrintfCString fileName("%sdmd-%d.log.gz", dmdFilePrefix, base::GetCurrentProcId());
FILE* logFile = fopen(fileName.get(), "w");
nsMemoryInfoDumper::DumpDMDToFile(logFile);
}
#endif
namespace mozilla {
void
LogTerm()
@ -978,6 +1012,10 @@ LogTerm()
nsTraceRefcnt::SetActivityIsLegal(false);
gActivityTLS = BAD_TLS_INDEX;
#endif
#ifdef MOZ_DMD
LogDMDFile();
#endif
}
}