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Issue #21 - Remove Telemetry plumbing and fix build.

Browse source 
Note this won't give working applications. Requires FE changes and
additional js module changes (next part).
This commit is contained in:
Moonchild 2021-10-29 11:02:27 +00:00 • committed by roytam1
commit 8d800b1cb0
205 changed files with 45 additions and 40519 deletions
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101
xpcom/build/LateWriteChecks.cpp
View file

@ -7,11 +7,9 @@
#include "mozilla/IOInterposer.h"
#include "mozilla/PoisonIOInterposer.h"
#include "mozilla/ProcessedStack.h"
#include "mozilla/SHA1.h"
#include "mozilla/Scoped.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/Telemetry.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsPrintfCString.h"
@ -34,8 +32,6 @@
#include "LateWriteChecks.h"
#define OBSERVE_LATE_WRITES
using namespace mozilla;
/*************************** Auxiliary Declarations ***************************/
@ -111,102 +107,7 @@ private:
void
LateWriteObserver::Observe(IOInterposeObserver::Observation& aOb)
{
#ifdef OBSERVE_LATE_WRITES
// Crash if that is the shutdown check mode
if (gShutdownChecks == SCM_CRASH) {
MOZ_CRASH();
}
// If we have shutdown mode SCM_NOTHING or we can't record then abort
if (gShutdownChecks == SCM_NOTHING || !Telemetry::CanRecordExtended()) {
return;
}
// Write the stack and loaded libraries to a file. We can get here
// concurrently from many writes, so we use multiple temporary files.
std::vector<uintptr_t> rawStack;
MozStackWalk(RecordStackWalker, /* skipFrames */ 0, /* maxFrames */ 0,
reinterpret_cast<void*>(&rawStack), 0, nullptr);
Telemetry::ProcessedStack stack = Telemetry::GetStackAndModules(rawStack);
nsPrintfCString nameAux("%s%s%s", mProfileDirectory,
NS_SLASH, "Telemetry.LateWriteTmpXXXXXX");
char* name;
nameAux.GetMutableData(&name);
// We want the sha1 of the entire file, so please don't write to fd
// directly; use sha1Stream.
FILE* stream;
#ifdef XP_WIN
HANDLE hFile;
do {
// mkstemp isn't supported so keep trying until we get a file
int result = _mktemp_s(name, strlen(name) + 1);
hFile = CreateFileA(name, GENERIC_WRITE, 0, nullptr, CREATE_NEW,
FILE_ATTRIBUTE_NORMAL, nullptr);
} while (GetLastError() == ERROR_FILE_EXISTS);
if (hFile == INVALID_HANDLE_VALUE) {
NS_RUNTIMEABORT("Um, how did we get here?");
}
// http://support.microsoft.com/kb/139640
int fd = _open_osfhandle((intptr_t)hFile, _O_APPEND);
if (fd == -1) {
NS_RUNTIMEABORT("Um, how did we get here?");
}
stream = _fdopen(fd, "w");
#else
int fd = mkstemp(name);
stream = fdopen(fd, "w");
#endif
SHA1Stream sha1Stream(stream);
size_t numModules = stack.GetNumModules();
sha1Stream.Printf("%u\n", (unsigned)numModules);
for (size_t i = 0; i < numModules; ++i) {
Telemetry::ProcessedStack::Module module = stack.GetModule(i);
sha1Stream.Printf("%s %s\n", module.mBreakpadId.c_str(),
module.mName.c_str());
}
size_t numFrames = stack.GetStackSize();
sha1Stream.Printf("%u\n", (unsigned)numFrames);
for (size_t i = 0; i < numFrames; ++i) {
const Telemetry::ProcessedStack::Frame& frame = stack.GetFrame(i);
// NOTE: We write the offsets, while the atos tool expects a value with
// the virtual address added. For example, running otool -l on the the firefox
// binary shows
// cmd LC_SEGMENT_64
// cmdsize 632
// segname __TEXT
// vmaddr 0x0000000100000000
// so to print the line matching the offset 123 one has to run
// atos -o firefox 0x100000123.
sha1Stream.Printf("%d %x\n", frame.mModIndex, (unsigned)frame.mOffset);
}
SHA1Sum::Hash sha1;
sha1Stream.Finish(sha1);
// Note: These files should be deleted by telemetry once it reads them. If
// there were no telemetry runs by the time we shut down, we just add files
// to the existing ones instead of replacing them. Given that each of these
// files is a bug to be fixed, that is probably the right thing to do.
// We append the sha1 of the contents to the file name. This provides a simple
// client side deduplication.
nsPrintfCString finalName("%s%s", mProfileDirectory,
"/Telemetry.LateWriteFinal-");
for (int i = 0; i < 20; ++i) {
finalName.AppendPrintf("%02x", sha1[i]);
}
PR_Delete(finalName.get());
PR_Rename(name, finalName.get());
#endif
/* *** STUB *** */
}
/******************************* Setup/Teardown *******************************/