goldshtn

#!/usr/bin/env python
#
# USAGE:    place-probe [-h] [--dry-run] [--debug] PID METHOD
#
# This tool helps place dynamic probes on .NET methods that were
# CrossGen-generated (compiled ahead of time). To use the tool,
# the CrossGen-generated assemblies need to have perfmaps generated
# by CrossGen /CreatePerfMap, expected in the /tmp directory.
#
# Copyright (C) 2018, Sasha Goldshtein

goldshtn

diff --git a/build/../tools/argdist.py b/usr/share/bcc/tools/argdist
index 61f8e00..746d1b7 100755
--- a/build/../tools/argdist.py
+++ b/usr/share/bcc/tools/argdist
@@ -451,7 +451,10 @@ DATA_DECL
                 # Most fields can be converted with plain str(), but strings
                 # are wrapped in a __string_t which has an .s field
                 if "__string_t" in type(v).__name__:
-                        return str(v.s)
+                        s = bytearray(v.s)

goldshtn

diff --git a/src/scripts/genXplatLttng.py b/src/scripts/genXplatLttng.py
index bacf034..3d40d77 100644
--- a/src/scripts/genXplatLttng.py
+++ b/src/scripts/genXplatLttng.py
@@ -407,8 +407,25 @@ def generateLttngTpProvider(providerName, eventNodes, allTemplates):
     for eventNode in eventNodes:
         eventName    = eventNode.getAttribute('symbol')
         templateName = eventNode.getAttribute('template')
+
+        template = allTemplates[templateName] if templateName else None

goldshtn

#!/usr/bin/env python
#
# analyze.py    Example of an LLDB script that loads SOS and runs a command
#               for analysis of a .NET Core application on Linux/macOS.
#               Requires LLDB matching the version of libsosplugin.so for your
#               CoreCLR version, and gdb.
#
# USAGE:        analyze.py [--memory] [--stacks] COREFILE
#
# NOTE: To run this as stand-alone, you might need to fix some bad symlinks

goldshtn

#!/usr/bin/env python
#
# USAGE:    dotnet-mapgen [-h] {generate,merge} PID
#
# In generate mode, this tool reads the /tmp/perfinfo-PID.map file generated
# by the CLR when running with COMPlus_PerfMapEnabled=1, and finds all load
# events for managed assemblies. For each managed assembly found in this way,
# the tool runs crossgen to generate a symbol mapping file (akin to debuginfo).
#
# In merge mode, this tool finds the load address of each managed assembly in

goldshtn

using Microsoft.Diagnostics.Runtime;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SDDTriage
{

goldshtn

; C++ core loop, key intrinsic is _mm_dp_ps
00007fff`548b10d5 0f100c0a        movups  xmm1,xmmword ptr [rdx+rcx]  ; LOOP
00007fff`548b10d9 0f1011          movups  xmm2,xmmword ptr [rcx]
00007fff`548b10dc 4883c110        add     rcx,10h
00007fff`548b10e0 660f3a40d1f1    dpps    xmm2,xmm1,0F1h
00007fff`548b10e6 f30f58c2        addss   xmm0,xmm2
00007fff`548b10ea 4983e801        sub     r8,1
00007fff`548b10ee 75e5            jne     00007fff`548b10d5  ; LOOP

; C# core loop, key intrinsic is Vector.Dot(Vector<float>, Vector<float>);

goldshtn

; C#, RyuJIT, release, x64
00007ffe`fc6808ec 4c63c8          movsxd  r9,eax						          ; loop: r9 = i
00007ffe`fc6808ef 4e0fbf4c4910    movsx   r9,word ptr [rcx+r9*2+10h]	; r9 = a[i]
00007ffe`fc6808f5 f3410f2ac9      cvtsi2ss xmm1,r9d						        ; xmm1 = (float)r9d
00007ffe`fc6808fa 4c63c8          movsxd  r9,eax                      ; r9 = i
00007ffe`fc6808fd f3420f594c8a10  mulss   xmm1,dword ptr [rdx+r9*4+10h] ; xmm1 *= b[i]
00007ffe`fc680904 f30f58c1        addss   xmm0,xmm1						        ; sum += xmm1
00007ffe`fc680908 ffc0            inc     eax							            ; ++i
00007ffe`fc68090a 443bc0          cmp     r8d,eax						          ; if i < a.Length
00007ffe`fc68090d 7fdd            jg      00007ffe`fc6808ec				    ;   goto loop

goldshtn

template <typename Predicate, typename Head, typename... Tail>
struct typelist_sort_t<Predicate, typelist<Head, Tail...>>
{
    using predicate = meta_partial_apply<Predicate, Head>;
    using notpredicate = meta_negate<predicate>;
    using smaller_than = typelist_filter<notpredicate, typelist<Tail...>>;
    using greater_than = typelist_filter<predicate, typelist<Tail...>>;
    using type = typelist_cat<
            typelist_sort<Predicate, smaller_than>,
            typelist<Head>,

goldshtn

Download the course materials; this archive contains the presentations, demos, and lab solutions. Please do not distribute these materials outside of your group.

In this lab, you will create a simple tip calculator which you’d then be able to use to split the bill and tip across your friends. You should use the iOS > Application > Single View Application project template in Xcode, because you will only have one screen and one view controller.

Your UI should have the following components:

• A title label that reads “Tip Calculator” – feel free to use a cute font here.
• A text field for the bill amount, and a label that explains what it is.
• A toggle switch that determines whether to round the bill to the nearest dollar, and a label that explains what it is.
• A button that reads “Split Bill”, which, when tapped, calculates the bill amount and tip amount for each person in your party and displays it in a separate label underneath the button.