EBPF::KernelSamplesTarget Class Reference

Inheritance diagram for EBPF::KernelSamplesTarget:

Public Member Functions
	KernelSamplesTarget (bool emitTrace=false, cstring name="Linux kernel")
cstring	abortReturnCode () const override
void	annotateTableWithBTF (Util::SourceCodeBuilder *builder, cstring name, cstring keyType, cstring valueType) const
cstring	dataEnd (cstring base) const override
cstring	dataLength (cstring base) const override
cstring	dataOffset (cstring base) const override
cstring	dropReturnCode () const override
void	emitCodeSection (Util::SourceCodeBuilder *builder, cstring sectionName) const override
void	emitIncludes (Util::SourceCodeBuilder *builder) const override
void	emitLicense (Util::SourceCodeBuilder *builder, cstring license) const override
void	emitMain (Util::SourceCodeBuilder *builder, cstring functionName, cstring argName) const override
void	emitMapInMapDecl (Util::SourceCodeBuilder *builder, cstring innerName, TableKind innerTableKind, cstring innerKeyType, cstring innerValueType, unsigned innerSize, cstring outerName, TableKind outerTableKind, cstring outerKeyType, unsigned outerSize) const override
void	emitPreamble (Util::SourceCodeBuilder *builder) const override
void	emitResizeBuffer (Util::SourceCodeBuilder *builder, cstring buffer, cstring offsetVar) const override
void	emitTableDecl (Util::SourceCodeBuilder *builder, cstring tblName, TableKind tableKind, cstring keyType, cstring valueType, unsigned size) const override
void	emitTableDeclSpinlock (Util::SourceCodeBuilder *builder, cstring tblName, TableKind tableKind, cstring keyType, cstring valueType, unsigned size) const override
void	emitTableLookup (Util::SourceCodeBuilder *builder, cstring tblName, cstring key, cstring value) const override
void	emitTableUpdate (Util::SourceCodeBuilder *builder, cstring tblName, cstring key, cstring value) const override
void	emitTraceMessage (Util::SourceCodeBuilder *builder, const char *format, int argc=0,...) const override
void	emitUserTableUpdate (Util::SourceCodeBuilder *builder, cstring tblName, cstring key, cstring value) const override
cstring	forwardReturnCode () const override
cstring	packetDescriptorType () const override
cstring	sysMapPath () const override
Public Member Functions inherited from EBPF::Target
virtual void	emitTraceMessage (Util::SourceCodeBuilder *builder, const char *format) const

Protected Attributes
bool	emitTraceMessages

Additional Inherited Members
Public Attributes inherited from EBPF::Target
const cstring	name
Protected Member Functions inherited from EBPF::Target
	Target (cstring name)

Member Function Documentation

emitTraceMessage()

void EBPF::KernelSamplesTarget::emitTraceMessage ( Util::SourceCodeBuilder *  builder, const char *  format, int  argc = 0,   ...  ) const

overridevirtual

Emit trace message which will be printed during packet processing (if enabled).

Parameters

builder	Actual source code builder.
format	Format string, interpreted by printk-like function. For more information see documentation for bpf_trace_printk.
argc	Number of variadic arguments. Up to 3 arguments can be passed due to limitation of eBPF.
...	Arguments to the format string, they must be C string and valid code in C.

To print variable value: emitTraceMessage(builder, "var=%u", 1, "var_name") To print expression value: emitTraceMessage(builder, "diff=%d", 1, "var1 - var2") To print just message: emitTraceMessage(builder, "Here")

Reimplemented from EBPF::Target.