diff options
Diffstat (limited to 'runtime')
| -rw-r--r-- | runtime/loc2c-runtime.h | 7 | ||||
| -rw-r--r-- | runtime/task_finder.c | 14 | ||||
| -rw-r--r-- | runtime/task_finder_vma.c | 12 |
3 files changed, 23 insertions, 10 deletions
diff --git a/runtime/loc2c-runtime.h b/runtime/loc2c-runtime.h index 215676ee..1247da51 100644 --- a/runtime/loc2c-runtime.h +++ b/runtime/loc2c-runtime.h @@ -113,16 +113,13 @@ kernel mode, it is not saved in the trap frame (struct pt_regs). The `esp' (and `xss') fields are valid only for a user-mode trap. For a kernel mode trap, the interrupted state's esp is actually an - address inside where the `struct pt_regs' on the kernel trap stack points. - - For now we assume all traps are from kprobes in kernel-mode code. - For extra paranoia, could do BUG_ON((regs->xcs & 3) == 3). */ + address inside where the `struct pt_regs' on the kernel trap stack points. */ #define dwarf_register_0(regs) regs->eax #define dwarf_register_1(regs) regs->ecx #define dwarf_register_2(regs) regs->edx #define dwarf_register_3(regs) regs->ebx -#define dwarf_register_4(regs) ((long) ®s->esp) +#define dwarf_register_4(regs) (user_mode(regs) ? regs->esp : (long)®s->esp) #define dwarf_register_5(regs) regs->ebp #define dwarf_register_6(regs) regs->esi #define dwarf_register_7(regs) regs->edi diff --git a/runtime/task_finder.c b/runtime/task_finder.c index af2345be..b8a0ae7f 100644 --- a/runtime/task_finder.c +++ b/runtime/task_finder.c @@ -1,5 +1,15 @@ +#ifndef TASK_FINDER_C +#define TASK_FINDER_C + +#if ! defined(CONFIG_UTRACE) +#error "Need CONFIG_UTRACE!" +#endif + +#include <linux/utrace.h> #include <linux/list.h> #include <linux/binfmts.h> +#include <linux/mount.h> + #include "syscall.h" #include "utrace_compatibility.h" #include "task_finder_vma.c" @@ -1069,6 +1079,7 @@ stap_start_task_finder(void) struct task_struct *grp, *tsk; char *mmpath_buf; + debug_task_finder_report(); mmpath_buf = _stp_kmalloc(PATH_MAX); if (mmpath_buf == NULL) { _stp_error("Unable to allocate space for path"); @@ -1189,3 +1200,6 @@ stap_stop_task_finder(void) debug_task_finder_report(); atomic_set(&__stp_task_finder_state, __STP_TF_STOPPED); } + + +#endif /* TASK_FINDER_C */ diff --git a/runtime/task_finder_vma.c b/runtime/task_finder_vma.c index 9d43e36c..c06b3db0 100644 --- a/runtime/task_finder_vma.c +++ b/runtime/task_finder_vma.c @@ -133,11 +133,13 @@ __stp_tf_add_vma(struct task_struct *tsk, unsigned long addr, hlist_for_each_entry(entry, node, head, hlist) { if (tsk->pid == entry->pid && addr == entry->addr) { - printk(KERN_NOTICE - "vma (pid: %d, vm_start: 0x%lx) present?\n", - tsk->pid, vma->vm_start); - mutex_unlock(&__stp_tf_vma_mutex); - return -EBUSY; /* Already there */ +#if DEBUG_TASK_FINDER_VMA + printk(KERN_NOTICE + "vma (pid: %d, vm_start: 0x%lx) present?\n", + tsk->pid, vma->vm_start); +#endif + mutex_unlock(&__stp_tf_vma_mutex); + return -EBUSY; /* Already there */ } } |