'Intermodular Analysis of C and C++ Projects - Part 1' cc: code_analysis pvs_studio cpp c++
. It is the identifier's property that defines the rules according to which an object is created and destroyed.– the object is placed in memory at the time of its definition and is released when the context of the program execution leaves the object's scope.defines the resources that will be placed in memory at the start of the program and released at its termination.will be placed in the memory of each thread separately from each other.
was originally used on UNIX systems and didn't support 64-bit architectures . Later it was replaced by the ELF format. With the development of COFF, Portable Executable appeared. This format is still used in Windows ;data – contains all initialized data that will be loaded when the program starts;symtab — a table of program symbols.
Now, let's look at contents of the sections. Since we are inspecting the subject area from the side of intermodular analysis, we will focus on the symbol table. It consists of records that have a certain structure. This is the simplest database, convenient for multiple reads. Moreover, all data is aligned in memory. Thanks to this, we can simply load them into the structure to work with them further.
Some compilers use their own object file formats to store intermediate information there. These include the LLVM bitcode , which stores an intermediate representation of LLVM IR in binary format, or GCC Gimple . All this information is used by compilers to implement Link Time Optimizations, in which intermodular analysis is also involved.Let's move closer to the topic of the article. Before trying to implement anything, let's look at how similar tasks were solved in other tools.
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