diff options
Diffstat (limited to 'tools/funcslower.py')
| -rwxr-xr-x | tools/funcslower.py | 72 |
1 files changed, 44 insertions, 28 deletions
diff --git a/tools/funcslower.py b/tools/funcslower.py index ffa618d7..ddd786fc 100755 --- a/tools/funcslower.py +++ b/tools/funcslower.py @@ -88,6 +88,13 @@ struct entry_t { u64 args[5]; #endif #endif +#ifdef USER_STACKS + int user_stack_id; +#endif +#ifdef KERNEL_STACKS + int kernel_stack_id; + u64 kernel_ip; +#endif }; struct data_t { @@ -143,6 +150,40 @@ static int trace_entry(struct pt_regs *ctx, int id) #endif #endif +#ifdef USER_STACKS + entry.user_stack_id = stacks.get_stackid(ctx, BPF_F_USER_STACK); +#endif + +#ifdef KERNEL_STACKS + entry.kernel_stack_id = stacks.get_stackid(ctx, 0); + + if (entry.kernel_stack_id >= 0) { + u64 ip = PT_REGS_IP(ctx); + u64 page_offset; + + // if ip isn't sane, leave key ips as zero for later checking +#if defined(CONFIG_X86_64) && defined(__PAGE_OFFSET_BASE) + // x64, 4.16, ..., 4.11, etc., but some earlier kernel didn't have it + page_offset = __PAGE_OFFSET_BASE; +#elif defined(CONFIG_X86_64) && defined(__PAGE_OFFSET_BASE_L4) + // x64, 4.17, and later +#if defined(CONFIG_DYNAMIC_MEMORY_LAYOUT) && defined(CONFIG_X86_5LEVEL) + page_offset = __PAGE_OFFSET_BASE_L5; +#else + page_offset = __PAGE_OFFSET_BASE_L4; +#endif +#else + // earlier x86_64 kernels, e.g., 4.6, comes here + // arm64, s390, powerpc, x86_32 + page_offset = PAGE_OFFSET; +#endif + + if (ip > page_offset) { + entry.kernel_ip = ip; + } + } +#endif + entryinfo.update(&tgid_pid, &entry); return 0; @@ -172,37 +213,12 @@ int trace_return(struct pt_regs *ctx) data.retval = PT_REGS_RC(ctx); #ifdef USER_STACKS - data.user_stack_id = stacks.get_stackid(ctx, BPF_F_USER_STACK); + data.user_stack_id = entryp->user_stack_id; #endif #ifdef KERNEL_STACKS - data.kernel_stack_id = stacks.get_stackid(ctx, 0); - - if (data.kernel_stack_id >= 0) { - u64 ip = PT_REGS_IP(ctx); - u64 page_offset; - - // if ip isn't sane, leave key ips as zero for later checking -#if defined(CONFIG_X86_64) && defined(__PAGE_OFFSET_BASE) - // x64, 4.16, ..., 4.11, etc., but some earlier kernel didn't have it - page_offset = __PAGE_OFFSET_BASE; -#elif defined(CONFIG_X86_64) && defined(__PAGE_OFFSET_BASE_L4) - // x64, 4.17, and later -#if defined(CONFIG_DYNAMIC_MEMORY_LAYOUT) && defined(CONFIG_X86_5LEVEL) - page_offset = __PAGE_OFFSET_BASE_L5; -#else - page_offset = __PAGE_OFFSET_BASE_L4; -#endif -#else - // earlier x86_64 kernels, e.g., 4.6, comes here - // arm64, s390, powerpc, x86_32 - page_offset = PAGE_OFFSET; -#endif - - if (ip > page_offset) { - data.kernel_ip = ip; - } - } + data.kernel_stack_id = entryp->kernel_stack_id; + data.kernel_ip = entryp->kernel_ip; #endif #ifdef GRAB_ARGS |