stacksnoop: Migrate to new symbols API and remove addresses

tools/old/stacksnoop.py

@@ -119,10 +119,7 @@ while 1:
     (task, pid, cpu, flags, ts, msg) = b.trace_fields()
     if msg != "":
         (reg, addr) = msg.split(" ")
-        if offset:
-            ip = b.ksymaddr(int(addr, 16))
-        else:
-            ip = b.ksym(int(addr, 16))
+        ip = b.ksym(int(addr, 16), show_address=offset)
         msg = msg + " " + ip
     if verbose:
         print("%-18.9f %-12.12s %-6d %-3d %s" % (ts, task, pid, cpu, msg))

tools/stacksnoop.py

@@ -120,8 +120,8 @@ def print_event(cpu, data, size):
         print("%-18.9f %s" % (ts, function))
 
     for addr in stack_traces.walk(event.stack_id):
-        sym = b.ksymaddr(addr) if offset else b.ksym(addr)
-        print("\t%016x %s" % (addr, sym))
+        sym = b.ksym(addr, show_address=offset)
+        print("\t%s" % sym)
 
     print()
 

tools/stacksnoop_example.txt

@@ -8,12 +8,12 @@ to see how they were invoked. For example, tracing the submit_bio() call:
 # ./stacksnoop submit_bio
 TIME(s)            SYSCALL
 3592.838736000     submit_bio
-        ffffffff813bd961 submit_bio
-        ffffffff81257c12 submit_bh
-        ffffffff81301948 jbd2_journal_commit_transaction
-        ffffffff8130653a kjournald2
-        ffffffff810a2df8 kthread
-        ffffffff8183a122 ret_from_fork
+        submit_bio
+        submit_bh
+        jbd2_journal_commit_transaction
+        kjournald2
+        kthread
+        ret_from_fork
 
 This shows that submit_bio() was called by submit_bh(), which was called
 by jbd2_journal_commit_transaction(), and so on. 
@@ -28,12 +28,12 @@ The -v option includes more fields, including the on-CPU process (COMM and PID):
 # ./stacksnoop -v submit_bio
 TIME(s)            COMM         PID    CPU SYSCALL
 3734.855027000     jbd2/dm-0-8  313    0   submit_bio
-        ffffffff813bd961 submit_bio
-        ffffffff81257c12 submit_bh
-        ffffffff81301948 jbd2_journal_commit_transaction
-        ffffffff8130653a kjournald2
-        ffffffff810a2df8 kthread
-        ffffffff8183a122 ret_from_fork
+        submit_bio
+        submit_bh
+        jbd2_journal_commit_transaction
+        kjournald2
+        kthread
+        ret_from_fork
 
 This identifies the application issuing the sync syscall: the jbd2 process
 (COMM column).
@@ -45,30 +45,30 @@ process:
 # ./stacksnoop -v second_overflow
 TIME(s)            COMM         PID    CPU SYSCALL
 3837.526433000     <idle>       0      1   second_overflow
-        ffffffff810fac41 second_overflow
-        ffffffff81102320 tick_do_update_jiffies64
-        ffffffff81102bf0 tick_irq_enter
-        ffffffff810882ac irq_enter
-        ffffffff8183c7df smp_apic_timer_interrupt
-        ffffffff8183aae2 apic_timer_interrupt
-        ffffffff81038f9e default_idle
-        ffffffff8103979f arch_cpu_idle
-        ffffffff810c69da default_idle_call
-        ffffffff810c6cd7 cpu_startup_entry
-        ffffffff81051cbe start_secondary
+        second_overflow
+        tick_do_update_jiffies64
+        tick_irq_enter
+        irq_enter
+        smp_apic_timer_interrupt
+        apic_timer_interrupt
+        default_idle
+        arch_cpu_idle
+        default_idle_call
+        cpu_startup_entry
+        start_secondary
 
 3838.526953000     <idle>       0      1   second_overflow
-        ffffffff810fac41 second_overflow
-        ffffffff81102320 tick_do_update_jiffies64
-        ffffffff81102bf0 tick_irq_enter
-        ffffffff810882ac irq_enter
-        ffffffff8183c7df smp_apic_timer_interrupt
-        ffffffff8183aae2 apic_timer_interrupt
-        ffffffff81038f9e default_idle
-        ffffffff8103979f arch_cpu_idle
-        ffffffff810c69da default_idle_call
-        ffffffff810c6cd7 cpu_startup_entry
-        ffffffff81051cbe start_secondary
+        second_overflow
+        tick_do_update_jiffies64
+        tick_irq_enter
+        irq_enter
+        smp_apic_timer_interrupt
+        apic_timer_interrupt
+        default_idle
+        arch_cpu_idle
+        default_idle_call
+        cpu_startup_entry
+        start_secondary
 
 This fires every second (see TIME(s)), and is from tick_do_update_jiffies64().