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jade 14207e1cf8 Build with traps on signed overflow 
This is UB, we should not be doing it, and we can cheaply turn it into
crashes reliably. We would much rather have crashes than the program
doing something silly.

Benchmarks, but i wonder if they are nonsense because they get identical
times across compilers?!

| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `result-clang/bin/nix eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix` | 375.5 ± 24.0 | 353.8 | 408.8 | 1.00 |
| `result-gcc/bin/nix eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix` | 407.9 ± 26.0 | 385.1 | 449.5 | 1.09 ± 0.10 |
| `result-clangsan/bin/nix eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix` | 382.2 ± 26.6 | 354.9 | 419.0 | 1.02 ± 0.10 |
| `result-gccsan/bin/nix eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix` | 408.6 ± 24.6 | 384.5 | 441.9 | 1.09 ± 0.10 |

| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `result-clang/bin/nix search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello` | 17.199 ± 0.167 | 16.930 | 17.499 | 1.01 ± 0.01 |
| `result-gcc/bin/nix search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello` | 17.409 ± 0.126 | 17.242 | 17.633 | 1.02 ± 0.01 |
| `result-clangsan/bin/nix search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello` | 17.080 ± 0.137 | 16.879 | 17.350 | 1.00 |
| `result-gccsan/bin/nix search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello` | 17.396 ± 0.160 | 17.131 | 17.660 | 1.02 ± 0.01 |

| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `result-clang/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 6.267 ± 0.069 | 6.197 | 6.415 | 1.02 ± 0.01 |
| `result-gcc/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 6.232 ± 0.045 | 6.180 | 6.311 | 1.01 ± 0.01 |
| `result-clangsan/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 6.162 ± 0.020 | 6.133 | 6.196 | 1.00 |
| `result-gccsan/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 6.229 ± 0.031 | 6.199 | 6.289 | 1.01 ± 0.01 |

| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `GC_INITIAL_HEAP_SIZE=10g result-clang/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 4.683 ± 0.044 | 4.630 | 4.761 | 1.00 |
| `GC_INITIAL_HEAP_SIZE=10g result-gcc/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 4.750 ± 0.041 | 4.680 | 4.812 | 1.01 ± 0.01 |
| `GC_INITIAL_HEAP_SIZE=10g result-clangsan/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 4.703 ± 0.040 | 4.640 | 4.760 | 1.00 ± 0.01 |
| `GC_INITIAL_HEAP_SIZE=10g result-gccsan/bin/nix eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 4.766 ± 0.037 | 4.727 | 4.844 | 1.02 ± 0.01 |

Change-Id: I616ca3eab670317587d47b41870d8ac963c019ae
2024-03-27 23:54:04 -07:00
..
build-dir.mk Merge pull request #9465 from obsidiansystems/build-dir 2024-03-04 07:11:25 +01:00
clean.mk
common-test.sh Put functional tests in tests/functional 2023-12-01 12:06:43 -05:00
cxx-big-literal.mk Backport PR#10204 by 9999years: Replace foo with __NIX_STR in cxx-big-literal 2024-03-12 11:58:36 -07:00
debug-test.sh Harden tests' bash 2023-03-08 10:26:30 -05:00
disable-tests.mk Add ./configure --disable-tests option 2023-02-24 09:50:21 +01:00
functions.mk Revert "Get rid of unicode quotes (#1140)" 2016-11-26 00:38:01 +01:00
install-dirs.mk Merge pull request #9465 from obsidiansystems/build-dir 2024-03-04 07:11:25 +01:00
install.mk
lib.mk Merge pull request #5145 from fedepell/local_doc_build_5140 2024-03-05 23:01:05 +01:00
libraries.mk Build with traps on signed overflow 2024-03-27 23:54:04 -07:00
patterns.mk Enable -Werror=switch-enum 2023-04-03 18:45:20 +02:00
precompiled-headers.mk mk/precompiled-headers.mk: Remove special handling for clang 2020-10-06 13:27:09 +02:00
programs.mk support <program>_ENV variables 2024-03-13 19:48:26 +01:00
run-test.sh Remove "unexpected EOF" retry hack 2023-03-15 10:59:10 +01:00
templates.mk Merge pull request #9465 from obsidiansystems/build-dir 2024-03-04 07:11:25 +01:00
tests.mk Introduce notion of a test group, use for CA tests 2023-07-18 09:31:13 -04:00
tracing.mk Revert "Add support for building JARs from Java sources" 2021-02-26 23:06:58 +00:00