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Add support for FreeBSD on x86 #163

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merged 8 commits into from
Jul 2, 2021
Merged

Add support for FreeBSD on x86 #163

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c86c2a9
Add support for FreeBSD on x86
gchatelet Jun 25, 2021
bd2c2d1
Fix
gchatelet Jun 30, 2021
c434cf4
Add missing fs variable
gchatelet Jul 1, 2021
ebe93a2
Fix assignment instead of comparison
gchatelet Jul 2, 2021
d3d9555
Fix missing fake file system in tests
gchatelet Jul 2, 2021
6ceeefc
Also make line non const so it can be changed.
gchatelet Jul 2, 2021
2fba62f
cast away constness in the meantime
gchatelet Jul 2, 2021
2f8c741
Correct casting (hopefuly)
gchatelet Jul 2, 2021
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15 changes: 8 additions & 7 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -141,13 +141,14 @@ flags : aes,avx,cx16,smx,sse4_1,sse4_2,ssse3
<a name="support"></a>
## What's supported

| | x86³ | ARM | AArch64 | MIPS⁴ | POWER |
|---------|:----:|:-------:|:-------:|:------:|:-------:|
| Android | yes² | yes¹ | yes¹ | yes¹ | N/A |
| iOS | N/A | not yet | not yet | N/A | N/A |
| Linux | yes² | yes¹ | yes¹ | yes¹ | yes¹ |
| MacOs | yes² | N/A | not yet | N/A | no |
| Windows | yes² | not yet | not yet | N/A | N/A |
| | x86³ | ARM | AArch64 | MIPS⁴ | POWER |
|---------|-:-:--|-:-:-----|-:-:-----|-:-:-----|-:-:-----|
| Android | yes² | yes¹ | yes¹ | yes¹ | N/A |
| iOS | N/A | not yet | not yet | N/A | N/A |
| Linux | yes² | yes¹ | yes¹ | yes¹ | yes¹ |
| MacOs | yes² | N/A | not yet | N/A | no |
| Windows | yes² | not yet | not yet | N/A | N/A |
| FreeBSD | yes² | not yet | not yet | not yet | not yet |

1. **Features revealed from Linux.** We gather data from several sources
depending on availability:
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4 changes: 4 additions & 0 deletions include/cpu_features_macros.h
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Expand Up @@ -83,6 +83,10 @@
#define CPU_FEATURES_OS_DARWIN
#endif

#if (defined(__freebsd__) || defined(__FreeBSD__))
#define CPU_FEATURES_OS_FREEBSD
#endif

////////////////////////////////////////////////////////////////////////////////
// Compilers
////////////////////////////////////////////////////////////////////////////////
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40 changes: 39 additions & 1 deletion src/cpuinfo_x86.c
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Expand Up @@ -98,7 +98,8 @@
// microarchitectures.
#if defined(CPU_FEATURES_OS_WINDOWS)
#include <windows.h> // IsProcessorFeaturePresent
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID) || \
defined(CPU_FEATURES_OS_FREEBSD)
#include "internal/filesystem.h" // Needed to parse /proc/cpuinfo
#include "internal/stack_line_reader.h" // Needed to parse /proc/cpuinfo
#include "internal/string_view.h" // Needed to parse /proc/cpuinfo
Expand Down Expand Up @@ -1330,6 +1331,43 @@ static void ParseCpuId(const uint32_t max_cpuid_leaf, X86Info* info,
features->ssse3 = GetDarwinSysCtlByName("hw.optional.supplementalsse3");
features->sse4_1 = GetDarwinSysCtlByName("hw.optional.sse4_1");
features->sse4_2 = GetDarwinSysCtlByName("hw.optional.sse4_2");
#elif defined(CPU_FEATURES_OS_FREEBSD)
// Handling FreeBSD platform through parsing /var/run/dmesg.boot.
const int fd = CpuFeatures_OpenFile("/var/run/dmesg.boot");
if (fd >= 0) {
StackLineReader reader;
StackLineReader_Initialize(&reader, fd);
for (;;) {
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@Mizux Mizux Jun 25, 2021 •
edited
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Out of curiosity, is there any difference with using while (true) { ?
EDIT: you're using for (;;) also just below so for consistency, we should at least use the same semantic in both cases.

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No difference between for(;;) and while(true). We could use either one.

const LineResult result = StackLineReader_NextLine(&reader);
const StringView line = result.line;
const bool is_feature =
CpuFeatures_StringView_StartsWith(line, str(" Features="));
const bool is_feature2 =
CpuFeatures_StringView_StartsWith(line, str(" Features2="));
if (is_feature || is_feature2) {
// Lines of interests are of the following form:
// " Features=0x1783fbff<PSE36,MMX,FXSR,SSE,SSE2,HTT>"
// We replace '<', '>' and ',' with space so we can search by
// whitespace separated word.
for (size_t i = 0; i < line.size; ++i) {
if (line.ptr[i] == '<' || line.ptr[i] == '>' || line.ptr[i] == ',')
line.ptr[i] == ' ';
}
if (is_feature) {
features->sse = CpuFeatures_StringView_HasWord(line, "SSE");
features->sse2 = CpuFeatures_StringView_HasWord(line, "SSE2");
}
if (is_feature2) {
features->sse3 = CpuFeatures_StringView_HasWord(line, "SSE3");
features->ssse3 = CpuFeatures_StringView_HasWord(line, "SSSE3");
features->sse4_1 = CpuFeatures_StringView_HasWord(line, "SSE4.1");
features->sse4_2 = CpuFeatures_StringView_HasWord(line, "SSE4.2");
}
}
if (result.eof) break;
}
CpuFeatures_CloseFile(fd);
}
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
// Handling Linux platform through /proc/cpuinfo.
const int fd = CpuFeatures_OpenFile("/proc/cpuinfo");
Expand Down
64 changes: 43 additions & 21 deletions test/cpuinfo_x86_test.cc
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Expand Up @@ -666,21 +666,29 @@ TEST_F(CpuidX86Test, Nehalem) {
PF_XMMI64_INSTRUCTIONS_AVAILABLE);
g_fake_cpu->SetWindowsIsProcessorFeaturePresent(
PF_SSE3_INSTRUCTIONS_AVAILABLE);
#endif // CPU_FEATURES_OS_WINDOWS
#if defined(CPU_FEATURES_OS_DARWIN)
#elif defined(CPU_FEATURES_OS_DARWIN)
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse2");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse3");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.supplementalsse3");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse4_1");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse4_2");
#endif // CPU_FEATURES_OS_DARWIN
#if defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
#elif defined(CPU_FEATURES_OS_FREEBSD)
auto& fs = GetEmptyFilesystem();
fs.CreateFile("/var/run/dmesg.boot", R"(
---<<BOOT>>---
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Even though this will be moot when the branch goes EOL at the end of September, FreeBSD 11 does not have this line in dmesg.boot.

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Ack. It was present in a dump of a FreeBSD 12.2-RELEASE r366954 GENERIC amd64

---<<BOOT>>---
Copyright (c) 1992-2020 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 12.2-RELEASE r366954 GENERIC amd64
FreeBSD clang version 10.0.1 ([email protected]:llvm/llvm-project.git llvmorg-10.0.1-0-gef32c611aa2)
VT(vga): text 80x25
module vtnet already present!
CPU: Intel(R) Core(TM) i7-10710U CPU @ 1.10GHz (1607.96-MHz K8-class CPU)
  Origin="GenuineIntel"  Id=0xa0660  Family=0x6  Model=0xa6  Stepping=0
  Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,HTT>
  Features2=0x5eda2203<SSE3,PCLMULQDQ,SSSE3,CX16,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,AVX,RDRAND>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x121<LAHF,ABM,Prefetch>
  Structured Extended Features=0x842421<FSGSBASE,AVX2,INVPCID,NFPUSG,RDSEED,CLFLUSHOPT>
  Structured Extended Features3=0x30000400<MD_CLEAR,L1DFL,ARCH_CAP>
  TSC: P-state invariant
real memory  = 2147418112 (2047 MB)
avail memory = 2044313600 (1949 MB)

FWIW we don't use this line but it's a representative input.

Copyright (c) 1992-2020 The FreeBSD Project.
FreeBSD is a registered trademark of The FreeBSD Foundation.
Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,HTT>
Features2=0x5eda2203<SSE3,PCLMULQDQ,SSSE3,CX16,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,RDRAND>
real memory = 2147418112 (2047 MB)
)");
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
auto& fs = GetEmptyFilesystem();
fs.CreateFile("/proc/cpuinfo", R"(processor :
flags : fpu mmx sse sse2 sse3 ssse3 sse4_1 sse4_2
)");
#endif // CPU_FEATURES_OS_LINUX_OR_ANDROID
#endif
g_fake_cpu->SetLeaves({
{{0x00000000, 0}, Leaf{0x0000000B, 0x756E6547, 0x6C65746E, 0x49656E69}},
{{0x00000001, 0}, Leaf{0x000106A2, 0x00100800, 0x00BCE3BD, 0xBFEBFBFF}},
Expand Down Expand Up @@ -723,13 +731,13 @@ flags : fpu mmx sse sse2 sse3 ssse3 sse4_1 sse4_2
EXPECT_TRUE(info.features.sse);
EXPECT_TRUE(info.features.sse2);
EXPECT_TRUE(info.features.sse3);
#ifndef CPU_FEATURES_OS_WINDOWS
#if !defined(CPU_FEATURES_OS_WINDOWS)
// Currently disabled on Windows as IsProcessorFeaturePresent do not support
// feature detection > sse3.
EXPECT_TRUE(info.features.ssse3);
EXPECT_TRUE(info.features.sse4_1);
EXPECT_TRUE(info.features.sse4_2);
#endif // CPU_FEATURES_OS_WINDOWS
#endif // !defined(CPU_FEATURES_OS_WINDOWS)
}

// https://github.com/InstLatx64/InstLatx64/blob/master/GenuineIntel/GenuineIntel0030673_Silvermont3_CPUID.txt
Expand All @@ -743,21 +751,28 @@ TEST_F(CpuidX86Test, Atom) {
PF_XMMI64_INSTRUCTIONS_AVAILABLE);
g_fake_cpu->SetWindowsIsProcessorFeaturePresent(
PF_SSE3_INSTRUCTIONS_AVAILABLE);
#endif // CPU_FEATURES_OS_WINDOWS
#if defined(CPU_FEATURES_OS_DARWIN)
#elif defined(CPU_FEATURES_OS_DARWIN)
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse2");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse3");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.supplementalsse3");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse4_1");
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse4_2");
#endif // CPU_FEATURES_OS_DARWIN
#if defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
#elif defined(CPU_FEATURES_OS_FREEBSD)
fs.CreateFile("/var/run/dmesg.boot", R"(
---<<BOOT>>---
Copyright (c) 1992-2020 The FreeBSD Project.
FreeBSD is a registered trademark of The FreeBSD Foundation.
Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,HTT>
Features2=0x5eda2203<SSE3,PCLMULQDQ,SSSE3,CX16,PCID,SSE4.1,SSE4.2,MOVBE,POPCNT,AESNI,XSAVE,OSXSAVE,RDRAND>
real memory = 2147418112 (2047 MB)
)");
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
auto& fs = GetEmptyFilesystem();
fs.CreateFile("/proc/cpuinfo", R"(
flags : fpu mmx sse sse2 sse3 ssse3 sse4_1 sse4_2
)");
#endif // CPU_FEATURES_OS_LINUX_OR_ANDROID
#endif
g_fake_cpu->SetLeaves({
{{0x00000000, 0}, Leaf{0x0000000B, 0x756E6547, 0x6C65746E, 0x49656E69}},
{{0x00000001, 0}, Leaf{0x00030673, 0x00100800, 0x41D8E3BF, 0xBFEBFBFF}},
Expand Down Expand Up @@ -800,13 +815,13 @@ flags : fpu mmx sse sse2 sse3 ssse3 sse4_1 sse4_2
EXPECT_TRUE(info.features.sse);
EXPECT_TRUE(info.features.sse2);
EXPECT_TRUE(info.features.sse3);
#ifndef CPU_FEATURES_OS_WINDOWS
#if !defined(CPU_FEATURES_OS_WINDOWS)
// Currently disabled on Windows as IsProcessorFeaturePresent do not support
// feature detection > sse3.
EXPECT_TRUE(info.features.ssse3);
EXPECT_TRUE(info.features.sse4_1);
EXPECT_TRUE(info.features.sse4_2);
#endif // CPU_FEATURES_OS_WINDOWS
#endif // !defined(CPU_FEATURES_OS_WINDOWS)
}

// https://github.com/InstLatx64/InstLatx64/blob/master/GenuineIntel/GenuineIntel0000673_P3_KatmaiDP_CPUID.txt
Expand All @@ -816,16 +831,23 @@ TEST_F(CpuidX86Test, P3) {
#if defined(CPU_FEATURES_OS_WINDOWS)
g_fake_cpu->SetWindowsIsProcessorFeaturePresent(
PF_XMMI_INSTRUCTIONS_AVAILABLE);
#endif // CPU_FEATURES_OS_WINDOWS
#if defined(CPU_FEATURES_OS_DARWIN)
#elif defined(CPU_FEATURES_OS_DARWIN)
g_fake_cpu->SetDarwinSysCtlByName("hw.optional.sse");
#endif // CPU_FEATURES_OS_DARWIN
#if defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
#elif defined(CPU_FEATURES_OS_FREEBSD)
auto& fs = GetEmptyFilesystem();
fs.CreateFile("/var/run/dmesg.boot", R"(
---<<BOOT>>---
Copyright (c) 1992-2020 The FreeBSD Project.
FreeBSD is a registered trademark of The FreeBSD Foundation.
Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
real memory = 2147418112 (2047 MB)
)");
#elif defined(CPU_FEATURES_OS_LINUX_OR_ANDROID)
auto& fs = GetEmptyFilesystem();
fs.CreateFile("/proc/cpuinfo", R"(
flags : fpu mmx sse
)");
#endif // CPU_FEATURES_OS_LINUX_OR_ANDROID
#endif
g_fake_cpu->SetLeaves({
{{0x00000000, 0}, Leaf{0x00000003, 0x756E6547, 0x6C65746E, 0x49656E69}},
{{0x00000001, 0}, Leaf{0x00000673, 0x00000000, 0x00000000, 0x0387FBFF}},
Expand All @@ -848,13 +870,13 @@ flags : fpu mmx sse
EXPECT_TRUE(info.features.sse);
EXPECT_FALSE(info.features.sse2);
EXPECT_FALSE(info.features.sse3);
#ifndef CPU_FEATURES_OS_WINDOWS
#if !defined(CPU_FEATURES_OS_WINDOWS)
// Currently disabled on Windows as IsProcessorFeaturePresent do not support
// feature detection > sse3.
EXPECT_FALSE(info.features.ssse3);
EXPECT_FALSE(info.features.sse4_1);
EXPECT_FALSE(info.features.sse4_2);
#endif // CPU_FEATURES_OS_WINDOWS
#endif // !defined(CPU_FEATURES_OS_WINDOWS)
}

// TODO(user): test what happens when xsave/osxsave are not present.
Expand Down