SFrame (Simple Frame format) support for stack traces

[XVilka]

Frame stands for Simple Frame format. SFrame format keeps track of the minimal necessary information needed for generating stack traces:

• Canonical Frame Address (CFA).
• Frame Pointer (FP).
• Return Address (RA).

The reason for existence of the SFrame format is to provide a simple, fast and low-overhead mechanism to generate stack traces.

The SFrame stack trace information is provided in a loaded section, known as the .sframe section. When available, the .sframe section appears in a new segment of its own, PT_GNU_SFRAME.

The SFrame format is currently supported only for select ABIs, namely, AMD64 and AAPCS64.

See these for the reference:

• https://sourceware.org/binutils/docs/sframe-spec.html
• https://sourceware.org/git?p=glibc.git;a=commit;h=170206b64196c4182e1addd0ce179523cfd6d1dc
• https://sourceware.org/git?p=glibc.git;a=commit;h=b231c21fc6bf7443d4949982f6a34f47605a19e5
• https://sourceware.org/git/?p=glibc.git;a=commit;h=3360913c37f5c3a0c8737b76321fd5ce2608fcd5
• https://sourceware.org/git?p=glibc.git;a=commit;h=3d780a44ebdb3fb780e04682df50da1145bcd98a