1. 08 Jun, 2018 1 commit
  2. 06 Jun, 2018 2 commits
  3. 05 Jun, 2018 3 commits
  4. 02 May, 2018 2 commits
  5. 01 May, 2018 2 commits
    • Paul Chaignon's avatar
      Detect external pointers from context pointers · b66a9c9b
      Paul Chaignon authored
      The bcc rewriter is currently unable to detect external pointers
      (i.e., to a memory address that requires calls to bpf_probe_read) if
      they are not declared as arguments, e.g., if they are retrieved
      through the context argument.
      For example, although the two following examples translate to the
      same C code in the end (the bcc rewriter translates the first into
      the second), the sk pointer is recognized as an external pointer only
      in the first example.
      
      int test1(struct pt_regs *ctx, struct sock *sk) {
          // sk is correctly recognized as an external pointer.
      }
      int test2(struct pt_regs *ctx) {
          struct sock *sk = (struct sock *)ctx->di;
          // sk is not recognized as an external pointer.
      }
      
      This commit fixes that by detecting member dereferences of the
      context argument (i.e., the first argument of externally visible
      functions). It also works for the TRACEPOINT_PROBE macro.
      b66a9c9b
    • Paul Chaignon's avatar
  6. 30 Apr, 2018 7 commits
  7. 29 Apr, 2018 6 commits
  8. 28 Apr, 2018 1 commit
  9. 27 Apr, 2018 5 commits
  10. 26 Apr, 2018 9 commits
  11. 25 Apr, 2018 2 commits