perf tools: Fix symbol offset computation for some dsos
For some dsos (e.g., libc, libpthread, kernel modules) the symbol offset
is huge. e.g.,
qemu-kvm 17238/17242 [007] 762235.640311:
ffffffff816288a1 __schedule+0x451 ([kernel.kallsyms])
ffffffff81629609 schedule+0x29 ([kernel.kallsyms])
ffffffffa00a6ded kvm_vcpu_block+0xffffffffa00a106d (/lib/modules/3.11.0-rc1+/kernel/arch/x86/kvm/kvm.ko)
ffffffffa00bae6b kvm_arch_vcpu_ioctl_run+0xffffffffa00a118b (/lib/modules/3.11.0-rc1+/kernel/arch/x86/kvm/kvm.ko)
ffffffffa00a4d7a kvm_vcpu_ioctl+0xffffffffa00a141a (/lib/modules/3.11.0-rc1+/kernel/arch/x86/kvm/kvm.ko)
ffffffff811a7bdb do_vfs_ioctl+0x8b ([kernel.kallsyms])
ffffffff811a80c1 sys_ioctl+0x91 ([kernel.kallsyms])
ffffffff81633182 system_call+0x72 ([kernel.kallsyms])
7f882a97af27 __GI___ioctl+0x7f882a891007 (/lib64/libc-2.14.90.so)
100000002 [unknown] ([unknown])
It seems to be maps with a non-0 start. Taking that into account the
offsets are correct:
qemu-kvm 17238/17242 [007] 762235.640311:
ffffffff816288a1 __schedule+0x451 ([kernel.kallsyms])
ffffffff81629609 schedule+0x29 ([kernel.kallsyms])
ffffffffa00a6ded kvm_vcpu_block+0x6d (/lib/modules/3.11.0-rc1+/kernel/arch/x86/kvm/kvm.ko)
ffffffffa00bae6b kvm_arch_vcpu_ioctl_run+0x18b (/lib/modules/3.11.0-rc1+/kernel/arch/x86/kvm/kvm.ko)
ffffffffa00a4d7a kvm_vcpu_ioctl+0x41a (/lib/modules/3.11.0-rc1+/kernel/arch/x86/kvm/kvm.ko)
ffffffff811a7bdb do_vfs_ioctl+0x8b ([kernel.kallsyms])
ffffffff811a80c1 sys_ioctl+0x91 ([kernel.kallsyms])
ffffffff81633182 system_call+0x72 ([kernel.kallsyms])
7f882a97af27 __GI___ioctl+0x7 (/lib64/libc-2.14.90.so)
100000002 [unknown] ([unknown])
Signed-off-by: David Ahern <dsahern@gmail.com>
Link: http://lkml.kernel.org/r/1375026512-45826-1-git-send-email-dsahern@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2 files changed