Fix the async-profiler re-fetch

[jbachorik]

The 'fetch/checkout' combo is not working well for updating the upstream repo.
It is replaced with 'clean/clone/checkout' instead

[github-actions]

🔧 Report generated by pr-comment-cppcheck

CppCheck Report

Errors (2)

• There is an unknown macro here somewhere. Configuration is required. If LP64_ONLY is a macro then please configure it.
• syntax error

Warnings (8)

• The class 'RecordingBuffer' defines member function with name 'flushIfNeeded' also defined in its parent class 'Buffer'.
• Member variable 'CodeCache::_image_base' is not initialized in the copy constructor.
• Member variable 'CodeCache::_image_base' is not assigned a value in 'CodeCache::operator='.
• Member variable 'JitWriteProtection::_restore' is not initialized in the constructor.
• Member variable 'JitWriteProtection::_restore' is not initialized in the constructor.
• Either the condition 'uc!=nullptr' is redundant or there is possible null pointer dereference: uc.
• Obsolete function 'alloca' called.
• Member variable 'ElfParser::_vaddr_diff' is not initialized in the constructor.

Style Violations (300)

• Class 'Arguments' has a constructor with 1 argument that is not explicit.
• struct member 'Multiplier::symbol' is never used.
• struct member 'Multiplier::multiplier' is never used.
• class member 'Error::OK' is never used.
• Class 'AsyncSampleMutex' has a constructor with 1 argument that is not explicit.
• The class 'NativeFunc' does not declare a constructor although it has private member variables which likely require initialization.
• Local variable 'count' shadows outer function
• Local variable 'blob' shadows outer function
• Local variable 'i' shadows outer variable
• Parameter 'prefixes' can be declared as reference to const
• Variable 'cb1' can be declared as pointer to const
• Variable 'cb2' can be declared as pointer to const
• Variable 'fd1' can be declared as pointer to const
• Variable 'fd2' can be declared as pointer to const
• Parameter 'name' can be declared as pointer to const
• Consider using std::transform algorithm instead of a raw loop.
• struct member 'ContextPage::capacity' is never used.
• struct member 'ContextPage::storage' is never used.
• class member 'Contexts::_max_pages' is never used.
• class member 'Contexts::_pages' is never used.
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• The function 'interval' overrides a function in a base class but is not marked with a 'override' specifier.
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• Operator '|' with one operand equal to zero is redundant.
• Operator '|' with one operand equal to zero is redundant.
• Operator '|' with one operand equal to zero is redundant.
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• Variable 'table' can be declared as pointer to const
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• class member 'J9WallClock::_max_stack_depth' is never used.
• class member 'J9WallClock::_running' is never used.
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• class member 'JVM::_is_readable_pointer' is never used.
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• struct member 'Chunk::prev' is never used.
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• The function 'unregisterThread' overrides a function in a base class but is not marked with a 'override' specifier.
• The function 'interval' overrides a function in a base class but is not marked with a 'override' specifier.
• The function 'enableEvents' overrides a function in a base class but is identical to the overridden function
• The function 'registerThread' overrides a function in a base class but is identical to the overridden function
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• The function 'check' overrides a function in a base class but is not marked with a 'override' specifier.
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• The function 'stop' overrides a function in a base class but is not marked with a 'override' specifier.
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• The function 'enableEvents' overrides a function in a base class but is not marked with a 'override' specifier.
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• class member 'PerfEvents::_use_mmap_page' is never used.
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• Local variable 'section' shadows outer function
• Local variable 'section' shadows outer function
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• Variable 'sym' can be declared as pointer to const
• Variable 'chain' can be declared as pointer to const
• Variable 'plt' can be declared as pointer to const
• Variable 'note' can be declared as pointer to const
• Variable 'sym' can be declared as pointer to const
• Parameter 'info' can be declared as pointer to const
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• struct member 'RootSymbolEntry::kind' is never used.
• class member 'ElfParser::_root_symbols' is never used.
• Class 'ExclusiveLock' has a constructor with 1 argument that is not explicit.
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• Same expression on both sides of '-'.
• Local variable 'count' shadows outer function
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• Local variable 'word' shadows outer function
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[github-actions]

🔧 Report generated by pr-comment-scanbuild

[r1viollet]

why remove the depth 1 ?

exec {
  commandLine 'git', 'clone', '--depth', '1', '--branch', branch_lock, 'https://github.com/datadog/async-profiler.git', targetDir.absolutePath
}

[jbachorik]

It does not allow moving the branch head and locking on a certain commit. It basically defeats the purpose of having the commit hash in the lock.
The async-profiler history is pretty light-weight so we are not saving that much by having just 1 level.
We may revisit this later and maybe lock the branch only and use the commit just as a check for whether we need to refresh the contents?

[r1viollet]

minor comment otherwise LGTM