Try   HackMD

USDTs in #26593

Setup

After I updated and cleaned out my system I started to see error:

$ bpftrace contrib/tracing/log_p2p_traffic.bt
: CommandLine Error: Option 'help-list' registered more than once!
LLVM ERROR: inconsistency in registered CommandLine options
fish: Job 1, 'bpftrace contrib/tracing/log_p2…' terminated by signal SIGABRT (Abort)

This was solved by building bcc myself from source with the -DENABLE_LLVM_SHARED=1 flag enabled.

I also had difficulty getting the python bcc bindings into my venv, but the easiest way was to build them from the bcc source tree, activate my venv in there, and pip install to the venv, which on Ubuntu looked like this overall:

git clone https://github.com/iovisor/bcc.git
mkdir bcc/build; cd bcc/build
cmake -DENABLE_LLVM_SHARED=1 ..  # fix the shared llvm issue
make
sudo make install
cmake -DPYTHON_CMD=python3 .. # build python3 binding
pushd src/python/
make
cd bcc-python3
pyenv local 3.7.16  # activate venv used for bitcoin
pip install .  ## install package to venv
popd

However I still had issues running bpf:

will@ubuntu in ~/src/bitcoin on 2022-11-only-prepare-tracepoint-arguments-when-tracing [$] via 🐍 3.7.16
₿ sudo bpftrace contrib/tracing/log_p2p_traffic.bt
FATAL: offset for register H$ not known
fish: Job 1, 'sudo bpftrace contrib/tracing/l…' terminated by signal SIGABRT (Abort)

will@ubuntu in ~/src/bitcoin on 2022-11-only-prepare-tracepoint-arguments-when-tracing [$] via 🐍 3.7.16
✗ ./contrib/tracing/log_raw_p2p_msgs.py (pidof bitcoind)
Hooking into bitcoind with pid 1994639
Traceback (most recent call last):
  File "./contrib/tracing/log_raw_p2p_msgs.py", line 184, in <module>
    main(pid)
  File "./contrib/tracing/log_raw_p2p_msgs.py", line 141, in main
    probe="inbound_message", fn_name="trace_inbound_message")
  File "/home/will/.pyenv/versions/3.7.16/lib/python3.7/site-packages/bcc/usdt.py", line 167, in enable_probe
    """ % probe)
bcc.usdt.USDTException: Failed to enable USDT probe 'inbound_message':
the specified pid might not contain the given language's runtime,
or the runtime was not built with the required USDT probes. Look
for a configure flag similar to --with-dtrace or --enable-dtrace.
To check which probes are present in the process, use the tplist tool.

My kernel tracing params all look ok:

will@ubuntu in …/src/bcc/tools on master via 🐍 3.7.16
✗ sudo cat /boot/config-5.19.0-35-generic | rg bpf
CONFIG_BPF=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_ARCH_WANT_DEFAULT_BPF_JIT=y
# BPF subsystem
CONFIG_BPF_SYSCALL=y
CONFIG_BPF_JIT=y
CONFIG_BPF_JIT_ALWAYS_ON=y
CONFIG_BPF_JIT_DEFAULT_ON=y
CONFIG_BPF_UNPRIV_DEFAULT_OFF=y
# CONFIG_BPF_PRELOAD is not set
CONFIG_BPF_LSM=y
# end of BPF subsystem
CONFIG_CGROUP_BPF=y
CONFIG_IPV6_SEG6_BPF=y
CONFIG_NETFILTER_XT_MATCH_BPF=m
CONFIG_BPFILTER=y
CONFIG_BPFILTER_UMH=m
CONFIG_NET_CLS_BPF=m
CONFIG_NET_ACT_BPF=m
CONFIG_BPF_STREAM_PARSER=y
CONFIG_LWTUNNEL_BPF=y
CONFIG_BPF_EVENTS=y
CONFIG_BPF_KPROBE_OVERRIDE=y
CONFIG_TEST_BPF=m

My Bitcoin Core configuration was good:

₿ rg tracing config.*
config.status
1423:D["ENABLE_TRACING"]=" 1"

config.log
2992:configure:33613: checking whether Userspace, Statically Defined Tracing tracepoints are supported
3099:| #define ENABLE_TRACING 1
3244:| #define ENABLE_TRACING 1
4216:#define ENABLE_TRACING 1

Trying to run bcc's tplist.py test tool as $user resulted in

will@ubuntu in …/src/bcc/tools on master via 🐍 3.7.16
✗ python tplist.py (pidof bitcoind)
[Errno 13] Permission denied: '/sys/kernel/debug/tracing/events'

and as su it seemed to run, but produced no output:

root@ubuntu $ /home/will/.pyenv/versions/3.7.16/bin/python tplist.py (pidof bitcoind)
root@ubuntu $

So let's try again with sudo and explicitly using the venv:

root@ubuntu $ /home/will/.pyenv/versions/3.7.16/bin/python contrib/tracing/log_raw_p2p_msgs.py (pidof bitcoind)
Hooking into bitcoind with pid 1994639
Logging raw P2P messages.
Messages larger that about 32kb will be cut off!
Some messages might be lost!
 inbound msg 'inv' from peer 10 (inbound, 127.0.0.1:53700) with 37 bytes: 0105000000abbe88c66c2dda69b5692f85eb3539ffe04328e480c43fd6e2da81348d818582
 inbound msg 'inv' from peer 12 (inbound, 127.0.0.1:50100) with 37 bytes: 0105000000abbe88c66c2dda69b5692f85eb3539ffe04328e480c43fd6e2da81348d818582
 outbound msg 'getdata' from peer 10 (inbound, 127.0.0.1:53700) with 37 bytes: 0105000000abbe88c66c2dda69b5692f85eb3539ffe04328e480c43fd6e2da81348d818582
 inbound msg 'inv' from peer 5 (outbound-full-relay, 159.223.42.103:38333) with 37 bytes: 0105000000abbe88c66c2dda69b5692f85eb3539ffe04328e480c43fd6e2da81348d818582

Success!

There did still seem to be an issue running bpftrace directly though:

root@ubuntu $ bpftrace contrib/tracing/log_p2p_traffic.bt
FATAL: offset for register H$ not known
fish: Job 1, 'bpftrace contrib/tracing/log_p2…' terminated by signal SIGABRT (Abort)

…which sort of sounds like bpftrace might be trying to use a hardware register not supported by my kernel? My kernel version is

₿ uname -r
5.19.0-35-generic

Review

Lightly tested ACK.

  1. I didn't manage to get bpftrace itself running on my Ubuntu system yet, but I was able to get the python scripts log_raw_p2p_msgs.py, log_utxocache_flush.py and p2p_monitor.py (using bcc) to run successfully under sudo.
    (I do wonder about the viability of the bpftrace scripts in this project, seeing as they seem to be so brittle/difficult to use.)
  2. The usdt tests all passed successfully:
​​interface_usdt_coinselection.py                        | ✓ Passed  | 5 s
​​interface_usdt_net.py                                  | ✓ Passed  | 4 s
​​interface_usdt_utxocache.py                            | ✓ Passed  | 11 s
​​interface_usdt_validation.py                           | ✓ Passed  | 3 s
  1. The new variadic macro is much simpler to reason about and I agree seems like a nice win all round.
  2. I was also able to see the new semaphores being loaded from memory, compared to zero, and conditionally jumped to, as detailed in the PR description, e.g. for CCoinsViewCache::AddCoin()
​​   ...
​​   0x0000000000b60927 <+615>:   movzwl 0xa64bea(%rip),%eax        # 0x15c5518 <utxocache_add_semaphore>
​​   0x0000000000b6092e <+622>:   cmp    $0x0,%eax
​​   0x0000000000b60931 <+625>:   jle    0xb609d6 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+790>
​​   ...
  1. I don't think having these semaphores in the global namespace should be a big issue for debugging or namespacing. So really it comes down to organisational priorities, where I'd agree with you that having them in the same file as the tracepoint feels cleaner.

disassembly

with tracepoints

(gdb)  disas CCoinsViewCache::AddCoin
Dump of assembler code for function _ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb:
   0x0000000000b606c0 <+0>:     endbr64
   0x0000000000b606c4 <+4>:     push   %rbp
   0x0000000000b606c5 <+5>:     mov    %rsp,%rbp
   0x0000000000b606c8 <+8>:     sub    $0xe0,%rsp
   0x0000000000b606cf <+15>:    mov    %cl,%al
   0x0000000000b606d1 <+17>:    mov    %fs:0x28,%rcx
   0x0000000000b606da <+26>:    mov    %rcx,-0x8(%rbp)
   0x0000000000b606de <+30>:    mov    %rdi,-0x50(%rbp)
   0x0000000000b606e2 <+34>:    mov    %rsi,-0x58(%rbp)
   0x0000000000b606e6 <+38>:    mov    %rdx,-0x60(%rbp)
   0x0000000000b606ea <+42>:    and    $0x1,%al
   0x0000000000b606ec <+44>:    mov    %al,-0x61(%rbp)
   0x0000000000b606ef <+47>:    mov    -0x50(%rbp),%rax
   0x0000000000b606f3 <+51>:    mov    %rax,-0xa0(%rbp)
   0x0000000000b606fa <+58>:    mov    -0x60(%rbp),%rdi
   0x0000000000b606fe <+62>:    call   0x35b460 <_ZNK4Coin7IsSpentEv>
   0x0000000000b60703 <+67>:    xor    $0xff,%al
   0x0000000000b60705 <+69>:    test   $0x1,%al
   0x0000000000b60707 <+71>:    jne    0xb60712 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+82>
   0x0000000000b6070d <+77>:    jmp    0xb60717 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+87>
   0x0000000000b60712 <+82>:    jmp    0xb60736 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+118>
   0x0000000000b60717 <+87>:    lea    0x4dd7aa(%rip),%rdi        # 0x103dec8
   0x0000000000b6071e <+94>:    lea    0x51237f(%rip),%rsi        # 0x1072aa4
   0x0000000000b60725 <+101>:   mov    $0x4b,%edx
   0x0000000000b6072a <+106>:   lea    0x51fea7(%rip),%rcx        # 0x10805d8
   0x0000000000b60731 <+113>:   call   0x35310 <__assert_fail@plt>
   0x0000000000b60736 <+118>:   mov    -0x60(%rbp),%rdi
   0x0000000000b6073a <+122>:   add    $0x8,%rdi
   0x0000000000b6073e <+126>:   call   0x406370 <_ZNK7CScript13IsUnspendableEv>
   0x0000000000b60743 <+131>:   test   $0x1,%al
   0x0000000000b60745 <+133>:   jne    0xb60750 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+144>
   0x0000000000b6074b <+139>:   jmp    0xb60755 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+149>
   0x0000000000b60750 <+144>:   jmp    0xb609d6 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+790>
   0x0000000000b60755 <+149>:   lea    -0x20(%rbp),%rdi
   0x0000000000b60759 <+153>:   call   0xb62be0 <_ZNSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEC2Ev>
   0x0000000000b6075e <+158>:   mov    -0xa0(%rbp),%rax
   0x0000000000b60765 <+165>:   add    $0x38,%rax
   0x0000000000b60769 <+169>:   mov    %rax,-0xa8(%rbp)
   0x0000000000b60770 <+176>:   mov    -0x58(%rbp),%rsi
   0x0000000000b60774 <+180>:   lea    -0x30(%rbp),%rdi
   0x0000000000b60778 <+184>:   call   0xb62a60 <_ZSt16forward_as_tupleIJRK9COutPointEESt5tupleIJDpOT_EES6_>
   0x0000000000b6077d <+189>:   mov    -0xa8(%rbp),%rdi
   0x0000000000b60784 <+196>:   lea    0x480225(%rip),%rsi        # 0xfe09b0 <_ZSt19piecewise_construct>
   0x0000000000b6078b <+203>:   lea    -0x30(%rbp),%rdx
   0x0000000000b6078f <+207>:   lea    -0x38(%rbp),%rcx
   0x0000000000b60793 <+211>:   call   0xb62c30 <_ZNSt13unordered_mapI9COutPoint16CCoinsCacheEntry20SaltedOutpointHasherSt8equal_toIS0_ESaISt4pairIKS0_S1_EEE7emplaceIJRKSt21piecewise_construct_tSt5tupleIJRS6_EESE_IJEEEEES5_INSt8__detail14_Node_iteratorIS7_Lb0ELb0EEEbEDpOT_>
   0x0000000000b60798 <+216>:   mov    %rax,-0x18(%rbp)
   0x0000000000b6079c <+220>:   mov    %dl,-0x10(%rbp)
   0x0000000000b6079f <+223>:   lea    -0x48(%rbp),%rdi
   0x0000000000b607a3 <+227>:   lea    -0x20(%rbp),%rsi
   0x0000000000b607a7 <+231>:   lea    -0x21(%rbp),%rdx
   0x0000000000b607ab <+235>:   call   0xb62cb0 <_ZSt3tieIJNSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEEbEESt5tupleIJDpRT_EESB_>
   0x0000000000b607b0 <+240>:   lea    -0x48(%rbp),%rdi
   0x0000000000b607b4 <+244>:   lea    -0x18(%rbp),%rsi
--Type <RET> for more, q to quit, c to continue without paging--c
   0x0000000000b607b8 <+248>:   call   0xb62d10 <_ZNSt5tupleIJRNSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEERbEEaSIS7_bEENSt9enable_ifIXcl12__assignableIT_T0_EEERSA_E4typeEOS2_ISD_SE_E>
   0x0000000000b607bd <+253>:   movb   $0x0,-0x62(%rbp)
   0x0000000000b607c1 <+257>:   testb  $0x1,-0x21(%rbp)
   0x0000000000b607c5 <+261>:   jne    0xb607fb <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+315>
   0x0000000000b607cb <+267>:   lea    -0x20(%rbp),%rdi
   0x0000000000b607cf <+271>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b607d4 <+276>:   mov    %rax,%rdi
   0x0000000000b607d7 <+279>:   add    $0x28,%rdi
   0x0000000000b607db <+283>:   call   0xb62b20 <_ZNK4Coin18DynamicMemoryUsageEv>
   0x0000000000b607e0 <+288>:   mov    %rax,%rdx
   0x0000000000b607e3 <+291>:   mov    -0xa0(%rbp),%rax
   0x0000000000b607ea <+298>:   mov    0x80(%rax),%rcx
   0x0000000000b607f1 <+305>:   sub    %rdx,%rcx
   0x0000000000b607f4 <+308>:   mov    %rcx,0x80(%rax)
   0x0000000000b607fb <+315>:   testb  $0x1,-0x61(%rbp)
   0x0000000000b607ff <+319>:   jne    0xb608a2 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+482>
   0x0000000000b60805 <+325>:   lea    -0x20(%rbp),%rdi
   0x0000000000b60809 <+329>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b6080e <+334>:   mov    %rax,%rdi
   0x0000000000b60811 <+337>:   add    $0x28,%rdi
   0x0000000000b60815 <+341>:   call   0x35b460 <_ZNK4Coin7IsSpentEv>
   0x0000000000b6081a <+346>:   test   $0x1,%al
   0x0000000000b6081c <+348>:   jne    0xb60885 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+453>
   0x0000000000b60822 <+354>:   mov    $0x10,%edi
   0x0000000000b60827 <+359>:   call   0x36ac0 <__cxa_allocate_exception@plt>
   0x0000000000b6082c <+364>:   mov    %rax,%rdi
   0x0000000000b6082f <+367>:   mov    %rdi,%rax
   0x0000000000b60832 <+370>:   mov    %rax,-0xb0(%rbp)
   0x0000000000b60839 <+377>:   lea    0x51fdd8(%rip),%rsi        # 0x1080618
   0x0000000000b60840 <+384>:   call   0x35dd0 <_ZNSt11logic_errorC1EPKc@plt>
   0x0000000000b60845 <+389>:   jmp    0xb6084a <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+394>
   0x0000000000b6084a <+394>:   mov    -0xb0(%rbp),%rdi
   0x0000000000b60851 <+401>:   mov    0xa637a0(%rip),%rsi        # 0x15c3ff8
   0x0000000000b60858 <+408>:   mov    0xa63771(%rip),%rdx        # 0x15c3fd0
   0x0000000000b6085f <+415>:   call   0x35990 <__cxa_throw@plt>
   0x0000000000b60864 <+420>:   endbr64
   0x0000000000b60868 <+424>:   mov    -0xb0(%rbp),%rdi
   0x0000000000b6086f <+431>:   mov    %rax,%rcx
   0x0000000000b60872 <+434>:   mov    %edx,%eax
   0x0000000000b60874 <+436>:   mov    %rcx,-0x70(%rbp)
   0x0000000000b60878 <+440>:   mov    %eax,-0x74(%rbp)
   0x0000000000b6087b <+443>:   call   0x37290 <__cxa_free_exception@plt>
   0x0000000000b60880 <+448>:   jmp    0xb609f5 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+821>
   0x0000000000b60885 <+453>:   lea    -0x20(%rbp),%rdi
   0x0000000000b60889 <+457>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b6088e <+462>:   movzbl 0x58(%rax),%eax
   0x0000000000b60892 <+466>:   and    $0x1,%eax
   0x0000000000b60895 <+469>:   cmp    $0x0,%eax
   0x0000000000b60898 <+472>:   setne  %al
   0x0000000000b6089b <+475>:   xor    $0xff,%al
   0x0000000000b6089d <+477>:   and    $0x1,%al
   0x0000000000b6089f <+479>:   mov    %al,-0x62(%rbp)
   0x0000000000b608a2 <+482>:   mov    -0x60(%rbp),%rax
   0x0000000000b608a6 <+486>:   mov    %rax,-0xc0(%rbp)
   0x0000000000b608ad <+493>:   lea    -0x20(%rbp),%rdi
   0x0000000000b608b1 <+497>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b608b6 <+502>:   mov    -0xc0(%rbp),%rsi
   0x0000000000b608bd <+509>:   mov    %rax,%rdi
   0x0000000000b608c0 <+512>:   add    $0x28,%rdi
   0x0000000000b608c4 <+516>:   call   0x5d2ae0 <_ZN4CoinaSEOS_>
   0x0000000000b608c9 <+521>:   mov    -0x62(%rbp),%dl
   0x0000000000b608cc <+524>:   xor    %eax,%eax
   0x0000000000b608ce <+526>:   mov    $0x2,%ecx
   0x0000000000b608d3 <+531>:   test   $0x1,%dl
   0x0000000000b608d6 <+534>:   cmovne %ecx,%eax
   0x0000000000b608d9 <+537>:   or     $0x1,%eax
   0x0000000000b608dc <+540>:   mov    %eax,-0xb4(%rbp)
   0x0000000000b608e2 <+546>:   lea    -0x20(%rbp),%rdi
   0x0000000000b608e6 <+550>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b608eb <+555>:   mov    -0xb4(%rbp),%edx
   0x0000000000b608f1 <+561>:   movzbl 0x58(%rax),%ecx
   0x0000000000b608f5 <+565>:   or     %edx,%ecx
   0x0000000000b608f7 <+567>:   mov    %cl,0x58(%rax)
   0x0000000000b608fa <+570>:   lea    -0x20(%rbp),%rdi
   0x0000000000b608fe <+574>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b60903 <+579>:   mov    %rax,%rdi
   0x0000000000b60906 <+582>:   add    $0x28,%rdi
   0x0000000000b6090a <+586>:   call   0xb62b20 <_ZNK4Coin18DynamicMemoryUsageEv>
   0x0000000000b6090f <+591>:   mov    %rax,%rcx
   0x0000000000b60912 <+594>:   mov    -0xa0(%rbp),%rax
   0x0000000000b60919 <+601>:   add    0x80(%rax),%rcx
   0x0000000000b60920 <+608>:   mov    %rcx,0x80(%rax)
   0x0000000000b60927 <+615>:   movzwl 0xa64bea(%rip),%eax        # 0x15c5518 <utxocache_add_semaphore>
   0x0000000000b6092e <+622>:   cmp    $0x0,%eax
   0x0000000000b60931 <+625>:   jle    0xb609d6 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+790>
   0x0000000000b60937 <+631>:   jmp    0xb6093c <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+636>
   0x0000000000b6093c <+636>:   mov    -0x58(%rbp),%rdi
   0x0000000000b60940 <+640>:   call   0x1f0fe0 <_ZNK9base_blobILj256EE4dataEv>
   0x0000000000b60945 <+645>:   mov    %rax,-0xd8(%rbp)
   0x0000000000b6094c <+652>:   mov    -0x58(%rbp),%rax
   0x0000000000b60950 <+656>:   mov    0x20(%rax),%eax
   0x0000000000b60953 <+659>:   mov    %eax,-0xd0(%rbp)
   0x0000000000b60959 <+665>:   lea    -0x20(%rbp),%rdi
   0x0000000000b6095d <+669>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b60962 <+674>:   mov    0x50(%rax),%eax
   0x0000000000b60965 <+677>:   shr    $0x1,%eax
   0x0000000000b60968 <+680>:   mov    %eax,-0xcc(%rbp)
   0x0000000000b6096e <+686>:   lea    -0x20(%rbp),%rdi
   0x0000000000b60972 <+690>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b60977 <+695>:   mov    0x28(%rax),%rax
   0x0000000000b6097b <+699>:   mov    %rax,-0xc8(%rbp)
   0x0000000000b60982 <+706>:   lea    -0x20(%rbp),%rdi
   0x0000000000b60986 <+710>:   call   0x5b02e0 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b6098b <+715>:   mov    %rax,%rdi
   0x0000000000b6098e <+718>:   add    $0x28,%rdi
   0x0000000000b60992 <+722>:   call   0x413720 <_ZNK4Coin10IsCoinBaseEv>
   0x0000000000b60997 <+727>:   mov    -0xd8(%rbp),%rdi
   0x0000000000b6099e <+734>:   mov    -0xd0(%rbp),%esi
   0x0000000000b609a4 <+740>:   mov    -0xcc(%rbp),%edx
   0x0000000000b609aa <+746>:   mov    -0xc8(%rbp),%rcx
   0x0000000000b609b1 <+753>:   mov    %rdi,-0x80(%rbp)
   0x0000000000b609b5 <+757>:   mov    %esi,-0x84(%rbp)
   0x0000000000b609bb <+763>:   mov    %edx,-0x88(%rbp)
   0x0000000000b609c1 <+769>:   mov    %rcx,-0x90(%rbp)
   0x0000000000b609c8 <+776>:   and    $0x1,%al
   0x0000000000b609ca <+778>:   mov    %al,-0x91(%rbp)
   0x0000000000b609d0 <+784>:   nop
   0x0000000000b609d1 <+785>:   jmp    0xb609d6 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+790>
   0x0000000000b609d6 <+790>:   mov    %fs:0x28,%rax
   0x0000000000b609df <+799>:   mov    -0x8(%rbp),%rcx
   0x0000000000b609e3 <+803>:   cmp    %rcx,%rax
   0x0000000000b609e6 <+806>:   jne    0xb609fe <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+830>
   0x0000000000b609ec <+812>:   add    $0xe0,%rsp
   0x0000000000b609f3 <+819>:   pop    %rbp
   0x0000000000b609f4 <+820>:   ret
   0x0000000000b609f5 <+821>:   mov    -0x70(%rbp),%rdi
   0x0000000000b609f9 <+825>:   call   0x35a20 <_Unwind_Resume@plt>
   0x0000000000b609fe <+830>:   call   0x35510 <__stack_chk_fail@plt>
End of assembler dump.
(gdb)

without tracepoints

(gdb) disas CCoinsViewCache::AddCoin
Dump of assembler code for function _ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb:
   0x0000000000b5fde0 <+0>:     endbr64
   0x0000000000b5fde4 <+4>:     push   %rbp
   0x0000000000b5fde5 <+5>:     mov    %rsp,%rbp
   0x0000000000b5fde8 <+8>:     sub    $0xa0,%rsp
   0x0000000000b5fdef <+15>:    mov    %cl,%al
   0x0000000000b5fdf1 <+17>:    mov    %fs:0x28,%rcx
   0x0000000000b5fdfa <+26>:    mov    %rcx,-0x8(%rbp)
   0x0000000000b5fdfe <+30>:    mov    %rdi,-0x50(%rbp)
   0x0000000000b5fe02 <+34>:    mov    %rsi,-0x58(%rbp)
   0x0000000000b5fe06 <+38>:    mov    %rdx,-0x60(%rbp)
   0x0000000000b5fe0a <+42>:    and    $0x1,%al
   0x0000000000b5fe0c <+44>:    mov    %al,-0x61(%rbp)
   0x0000000000b5fe0f <+47>:    mov    -0x50(%rbp),%rax
   0x0000000000b5fe13 <+51>:    mov    %rax,-0x80(%rbp)
   0x0000000000b5fe17 <+55>:    mov    -0x60(%rbp),%rdi
   0x0000000000b5fe1b <+59>:    call   0x35b210 <_ZNK4Coin7IsSpentEv>
   0x0000000000b5fe20 <+64>:    xor    $0xff,%al
   0x0000000000b5fe22 <+66>:    test   $0x1,%al
   0x0000000000b5fe24 <+68>:    jne    0xb5fe2f <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+79>
   0x0000000000b5fe2a <+74>:    jmp    0xb5fe34 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+84>
   0x0000000000b5fe2f <+79>:    jmp    0xb5fe53 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+115>
   0x0000000000b5fe34 <+84>:    lea    0x4dd08d(%rip),%rdi        # 0x103cec8
   0x0000000000b5fe3b <+91>:    lea    0x511c62(%rip),%rsi        # 0x1071aa4
   0x0000000000b5fe42 <+98>:    mov    $0x4b,%edx
   0x0000000000b5fe47 <+103>:   lea    0x51f78a(%rip),%rcx        # 0x107f5d8
   0x0000000000b5fe4e <+110>:   call   0x35310 <__assert_fail@plt>
   0x0000000000b5fe53 <+115>:   mov    -0x60(%rbp),%rdi
--Type <RET> for more, q to quit, c to continue without paging--c
   0x0000000000b5fe57 <+119>:   add    $0x8,%rdi
   0x0000000000b5fe5b <+123>:   call   0x406120 <_ZNK7CScript13IsUnspendableEv>
   0x0000000000b5fe60 <+128>:   test   $0x1,%al
   0x0000000000b5fe62 <+130>:   jne    0xb5fe6d <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+141>
   0x0000000000b5fe68 <+136>:   jmp    0xb5fe72 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+146>
   0x0000000000b5fe6d <+141>:   jmp    0xb6003b <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+603>
   0x0000000000b5fe72 <+146>:   lea    -0x20(%rbp),%rdi
   0x0000000000b5fe76 <+150>:   call   0xb62110 <_ZNSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEC2Ev>
   0x0000000000b5fe7b <+155>:   mov    -0x80(%rbp),%rax
   0x0000000000b5fe7f <+159>:   add    $0x38,%rax
   0x0000000000b5fe83 <+163>:   mov    %rax,-0x88(%rbp)
   0x0000000000b5fe8a <+170>:   mov    -0x58(%rbp),%rsi
   0x0000000000b5fe8e <+174>:   lea    -0x30(%rbp),%rdi
   0x0000000000b5fe92 <+178>:   call   0xb61f90 <_ZSt16forward_as_tupleIJRK9COutPointEESt5tupleIJDpOT_EES6_>
   0x0000000000b5fe97 <+183>:   mov    -0x88(%rbp),%rdi
   0x0000000000b5fe9e <+190>:   lea    0x47fb0b(%rip),%rsi        # 0xfdf9b0 <_ZSt19piecewise_construct>
   0x0000000000b5fea5 <+197>:   lea    -0x30(%rbp),%rdx
   0x0000000000b5fea9 <+201>:   lea    -0x38(%rbp),%rcx
   0x0000000000b5fead <+205>:   call   0xb62160 <_ZNSt13unordered_mapI9COutPoint16CCoinsCacheEntry20SaltedOutpointHasherSt8equal_toIS0_ESaISt4pairIKS0_S1_EEE7emplaceIJRKSt21piecewise_construct_tSt5tupleIJRS6_EESE_IJEEEEES5_INSt8__detail14_Node_iteratorIS7_Lb0ELb0EEEbEDpOT_>
   0x0000000000b5feb2 <+210>:   mov    %rax,-0x18(%rbp)
   0x0000000000b5feb6 <+214>:   mov    %dl,-0x10(%rbp)
   0x0000000000b5feb9 <+217>:   lea    -0x48(%rbp),%rdi
   0x0000000000b5febd <+221>:   lea    -0x20(%rbp),%rsi
   0x0000000000b5fec1 <+225>:   lea    -0x21(%rbp),%rdx
   0x0000000000b5fec5 <+229>:   call   0xb621e0 <_ZSt3tieIJNSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEEbEESt5tupleIJDpRT_EESB_>
   0x0000000000b5feca <+234>:   lea    -0x48(%rbp),%rdi
   0x0000000000b5fece <+238>:   lea    -0x18(%rbp),%rsi
   0x0000000000b5fed2 <+242>:   call   0xb62240 <_ZNSt5tupleIJRNSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEERbEEaSIS7_bEENSt9enable_ifIXcl12__assignableIT_T0_EEERSA_E4typeEOS2_ISD_SE_E>
   0x0000000000b5fed7 <+247>:   movb   $0x0,-0x62(%rbp)
   0x0000000000b5fedb <+251>:   testb  $0x1,-0x21(%rbp)
   0x0000000000b5fedf <+255>:   jne    0xb5ff12 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+306>
   0x0000000000b5fee5 <+261>:   lea    -0x20(%rbp),%rdi
   0x0000000000b5fee9 <+265>:   call   0x5b0090 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b5feee <+270>:   mov    %rax,%rdi
   0x0000000000b5fef1 <+273>:   add    $0x28,%rdi
   0x0000000000b5fef5 <+277>:   call   0xb62050 <_ZNK4Coin18DynamicMemoryUsageEv>
   0x0000000000b5fefa <+282>:   mov    %rax,%rdx
   0x0000000000b5fefd <+285>:   mov    -0x80(%rbp),%rax
   0x0000000000b5ff01 <+289>:   mov    0x80(%rax),%rcx
   0x0000000000b5ff08 <+296>:   sub    %rdx,%rcx
   0x0000000000b5ff0b <+299>:   mov    %rcx,0x80(%rax)
   0x0000000000b5ff12 <+306>:   testb  $0x1,-0x61(%rbp)
   0x0000000000b5ff16 <+310>:   jne    0xb5ffb9 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+473>
   0x0000000000b5ff1c <+316>:   lea    -0x20(%rbp),%rdi
   0x0000000000b5ff20 <+320>:   call   0x5b0090 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b5ff25 <+325>:   mov    %rax,%rdi
   0x0000000000b5ff28 <+328>:   add    $0x28,%rdi
   0x0000000000b5ff2c <+332>:   call   0x35b210 <_ZNK4Coin7IsSpentEv>
   0x0000000000b5ff31 <+337>:   test   $0x1,%al
   0x0000000000b5ff33 <+339>:   jne    0xb5ff9c <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+444>
   0x0000000000b5ff39 <+345>:   mov    $0x10,%edi
   0x0000000000b5ff3e <+350>:   call   0x36ac0 <__cxa_allocate_exception@plt>
   0x0000000000b5ff43 <+355>:   mov    %rax,%rdi
   0x0000000000b5ff46 <+358>:   mov    %rdi,%rax
   0x0000000000b5ff49 <+361>:   mov    %rax,-0x90(%rbp)
   0x0000000000b5ff50 <+368>:   lea    0x51f6c1(%rip),%rsi        # 0x107f618
   0x0000000000b5ff57 <+375>:   call   0x35dd0 <_ZNSt11logic_errorC1EPKc@plt>
   0x0000000000b5ff5c <+380>:   jmp    0xb5ff61 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+385>
   0x0000000000b5ff61 <+385>:   mov    -0x90(%rbp),%rdi
   0x0000000000b5ff68 <+392>:   mov    0xa63089(%rip),%rsi        # 0x15c2ff8
   0x0000000000b5ff6f <+399>:   mov    0xa6305a(%rip),%rdx        # 0x15c2fd0
   0x0000000000b5ff76 <+406>:   call   0x35990 <__cxa_throw@plt>
   0x0000000000b5ff7b <+411>:   endbr64
   0x0000000000b5ff7f <+415>:   mov    -0x90(%rbp),%rdi
   0x0000000000b5ff86 <+422>:   mov    %rax,%rcx
   0x0000000000b5ff89 <+425>:   mov    %edx,%eax
   0x0000000000b5ff8b <+427>:   mov    %rcx,-0x70(%rbp)
   0x0000000000b5ff8f <+431>:   mov    %eax,-0x74(%rbp)
   0x0000000000b5ff92 <+434>:   call   0x37290 <__cxa_free_exception@plt>
   0x0000000000b5ff97 <+439>:   jmp    0xb6005a <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+634>
   0x0000000000b5ff9c <+444>:   lea    -0x20(%rbp),%rdi
   0x0000000000b5ffa0 <+448>:   call   0x5b0090 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b5ffa5 <+453>:   movzbl 0x58(%rax),%eax
   0x0000000000b5ffa9 <+457>:   and    $0x1,%eax
   0x0000000000b5ffac <+460>:   cmp    $0x0,%eax
   0x0000000000b5ffaf <+463>:   setne  %al
   0x0000000000b5ffb2 <+466>:   xor    $0xff,%al
   0x0000000000b5ffb4 <+468>:   and    $0x1,%al
   0x0000000000b5ffb6 <+470>:   mov    %al,-0x62(%rbp)
   0x0000000000b5ffb9 <+473>:   mov    -0x60(%rbp),%rax
   0x0000000000b5ffbd <+477>:   mov    %rax,-0xa0(%rbp)
   0x0000000000b5ffc4 <+484>:   lea    -0x20(%rbp),%rdi
   0x0000000000b5ffc8 <+488>:   call   0x5b0090 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b5ffcd <+493>:   mov    -0xa0(%rbp),%rsi
   0x0000000000b5ffd4 <+500>:   mov    %rax,%rdi
   0x0000000000b5ffd7 <+503>:   add    $0x28,%rdi
   0x0000000000b5ffdb <+507>:   call   0x5d2890 <_ZN4CoinaSEOS_>
   0x0000000000b5ffe0 <+512>:   mov    -0x62(%rbp),%dl
   0x0000000000b5ffe3 <+515>:   xor    %eax,%eax
   0x0000000000b5ffe5 <+517>:   mov    $0x2,%ecx
   0x0000000000b5ffea <+522>:   test   $0x1,%dl
   0x0000000000b5ffed <+525>:   cmovne %ecx,%eax
   0x0000000000b5fff0 <+528>:   or     $0x1,%eax
   0x0000000000b5fff3 <+531>:   mov    %eax,-0x94(%rbp)
   0x0000000000b5fff9 <+537>:   lea    -0x20(%rbp),%rdi
   0x0000000000b5fffd <+541>:   call   0x5b0090 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b60002 <+546>:   mov    -0x94(%rbp),%edx
   0x0000000000b60008 <+552>:   movzbl 0x58(%rax),%ecx
   0x0000000000b6000c <+556>:   or     %edx,%ecx
   0x0000000000b6000e <+558>:   mov    %cl,0x58(%rax)
   0x0000000000b60011 <+561>:   lea    -0x20(%rbp),%rdi
   0x0000000000b60015 <+565>:   call   0x5b0090 <_ZNKSt8__detail14_Node_iteratorISt4pairIK9COutPoint16CCoinsCacheEntryELb0ELb0EEptEv>
   0x0000000000b6001a <+570>:   mov    %rax,%rdi
   0x0000000000b6001d <+573>:   add    $0x28,%rdi
   0x0000000000b60021 <+577>:   call   0xb62050 <_ZNK4Coin18DynamicMemoryUsageEv>
   0x0000000000b60026 <+582>:   mov    %rax,%rcx
   0x0000000000b60029 <+585>:   mov    -0x80(%rbp),%rax
   0x0000000000b6002d <+589>:   add    0x80(%rax),%rcx
   0x0000000000b60034 <+596>:   mov    %rcx,0x80(%rax)
   0x0000000000b6003b <+603>:   mov    %fs:0x28,%rax
   0x0000000000b60044 <+612>:   mov    -0x8(%rbp),%rcx
   0x0000000000b60048 <+616>:   cmp    %rcx,%rax
   0x0000000000b6004b <+619>:   jne    0xb60063 <_ZN15CCoinsViewCache7AddCoinERK9COutPointO4Coinb+643>
   0x0000000000b60051 <+625>:   add    $0xa0,%rsp
   0x0000000000b60058 <+632>:   pop    %rbp
   0x0000000000b60059 <+633>:   ret
   0x0000000000b6005a <+634>:   mov    -0x70(%rbp),%rdi
   0x0000000000b6005e <+638>:   call   0x35a20 <_Unwind_Resume@plt>
   0x0000000000b60063 <+643>:   call   0x35510 <__stack_chk_fail@plt>
End of assembler dump.
(gdb)
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