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import bpftrace-0.9.2-1.el8

This commit is contained in:
CentOS Sources 2020-04-28 04:50:17 -04:00 committed by Andrew Lukoshko
parent f446dffb6f
commit 0069d6708d
8 changed files with 12 additions and 739 deletions
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2
.bpftrace.metadata
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@ -1 +1 @@
a6409319efe13b553b05b8343077e2976b03a951 SOURCES/bpftrace-0.9.tar.gz
f35927be0719e7537e10cab1f4bee28705270ff8 SOURCES/bpftrace-0.9.2.tar.gz

2
.gitignore vendored
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@ -1 +1 @@
SOURCES/bpftrace-0.9.tar.gz
SOURCES/bpftrace-0.9.2.tar.gz

83
SOURCES/bpftrace-0.9-Ban-kprobes-that-cause-CPU-deadlocks.patch
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@ -1,83 +0,0 @@
From 40cf19078e0f5aca77bb53a17ab2913d1c58417d Mon Sep 17 00:00:00 2001
From: Javier Honduvilla Coto <javierhonduco@gmail.com>
Date: Thu, 11 Apr 2019 18:59:23 +0100
Subject: [PATCH] Ban kprobes that cause CPU deadlocks
---
src/attached_probe.cpp | 18 ++++++++++++++++++
tests/runtime/banned_probes | 19 +++++++++++++++++++
2 files changed, 37 insertions(+)
create mode 100644 tests/runtime/banned_probes
diff --git a/src/attached_probe.cpp b/src/attached_probe.cpp
index f83634a..073be78 100644
--- a/src/attached_probe.cpp
+++ b/src/attached_probe.cpp
@@ -24,6 +24,15 @@
namespace bpftrace {
const int BPF_LOG_SIZE = 100 * 1024;
+/*
+ * Kernel functions that are unsafe to trace are excluded in the Kernel with
+ * `notrace`. However, the ones below are not excluded.
+ */
+const std::set<std::string> banned_kretprobes = {
+ "_raw_spin_lock", "_raw_spin_lock_irqsave", "_raw_spin_unlock_irqrestore",
+ "queued_spin_lock_slowpath",
+};
+
bpf_probe_attach_type attachtype(ProbeType t)
{
@@ -60,6 +69,12 @@ bpf_prog_type progtype(ProbeType t)
}
}
+void check_banned_kretprobes(std::string const& kprobe_name) {
+ if (banned_kretprobes.find(kprobe_name) != banned_kretprobes.end()) {
+ std::cerr << "error: kretprobe:" << kprobe_name << " can't be used as it might lock up your system." << std::endl;
+ exit(1);
+ }
+}
AttachedProbe::AttachedProbe(Probe &probe, std::tuple<uint8_t *, uintptr_t> func)
: probe_(probe), func_(func)
@@ -70,7 +85,10 @@ AttachedProbe::AttachedProbe(Probe &probe, std::tuple<uint8_t *, uintptr_t> func
switch (probe_.type)
{
case ProbeType::kprobe:
+ attach_kprobe();
+ break;
case ProbeType::kretprobe:
+ check_banned_kretprobes(probe_.attach_point);
attach_kprobe();
break;
case ProbeType::uprobe:
diff --git a/tests/runtime/banned_probes b/tests/runtime/banned_probes
new file mode 100644
index 0000000..e892bd2
--- /dev/null
+++ b/tests/runtime/banned_probes
@@ -0,0 +1,19 @@
+NAME kretprobe:_raw_spin_lock is banned
+RUN bpftrace -e 'kretprobe:_raw_spin_lock { exit(); }'
+EXPECT error: kretprobe:_raw_spin_lock can't be used as it might lock up your system.
+TIMEOUT 1
+
+NAME kretprobe:queued_spin_lock_slowpath is banned
+RUN bpftrace -e 'kretprobe:queued_spin_lock_slowpath { exit(); }'
+EXPECT error: kretprobe:queued_spin_lock_slowpath can't be used as it might lock up your system.
+TIMEOUT 1
+
+NAME kretprobe:_raw_spin_unlock_irqrestore is banned
+RUN bpftrace -e 'kretprobe:_raw_spin_unlock_irqrestore { exit(); }'
+EXPECT error: kretprobe:_raw_spin_unlock_irqrestore can't be used as it might lock up your system.
+TIMEOUT 1
+
+NAME kretprobe:_raw_spin_lock_irqsave is banned
+RUN bpftrace -e 'kretprobe:_raw_spin_lock_irqsave { exit(); }'
+EXPECT error: kretprobe:_raw_spin_lock_irqsave can't be used as it might lock up your system.
+TIMEOUT 1
--
2.20.1

255
SOURCES/bpftrace-0.9-clang_parser-fix-clang_parser-for-LLVM-8.patch
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@ -1,255 +0,0 @@
From acb0ee316d5ed776253b6d7bfccfb21e0005919b Mon Sep 17 00:00:00 2001
From: Jerome Marchand <jmarchan@redhat.com>
Date: Thu, 16 May 2019 14:56:50 +0200
Subject: [PATCH] fix clang_parser for LLVM 8+
LLVM changed the behavior of clang_Cursor_isAnonymous in [1]. The old
behavior would returned false for direct-acccess anonymous structs
within other structs, whereas LLVM 8 returns true. To circumvent this
behavior change among LLVM versions, we keep track of all structs
defined within a struct. We don't parse the substruct recursively (if we
do it might be parsed multiple times, and since we don't know yet if
this is a direct or indirect strucutre, we might parse it incorrectly),
instead we keep the cursor saved in a map. If this substruct is later
declared as an attribute of the supersctruct, that means we have a
direct-accessible struct. We remove it from our map, and we parse
recursively (parsing recursively the cursor pointing to the declaration
will effectively parse the struct definition).
After the first parse, any struct left in our map is an indirect struct.
Since we skipped the parsing stage for those, we need to run
`clang_visitChildren` again for each struct cursor we have saved. We
repeat this until there's no unvisited structs in the map. Keep in mind
that while visiting a new struct we might find more indirect structs.
Also add Travis jobs to test against LLVM and clang 8 on Ubuntu.
[1]: llvm/llvm-project@c05e6f4
---
.travis.yml | 4 ++
docker/Dockerfile.bionic-llvm8 | 36 ++++++++++++++
src/bpforc.h | 9 ++++
src/clang_parser.cpp | 87 +++++++++++++++++++++++-----------
4 files changed, 108 insertions(+), 28 deletions(-)
create mode 100644 docker/Dockerfile.bionic-llvm8
diff --git a/.travis.yml b/.travis.yml
index 7fbff63..b539868 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -20,6 +20,10 @@ sudo: required
env: BASE=fedora29 TYPE=Debug
- name: "LLVM 7 Release"
env: BASE=fedora29 TYPE=Release
+ - name: "LLVM 8 Debug"
+ env: BASE=bionic-llvm8 TYPE=Debug
+ - name: "LLVM 8 Release"
+ env: BASE=bionic-llvm8 TYPE=Release
allow_failures:
- name: "Static LLVM 5 Debug"
env: BASE=alpine TYPE=Debug STATIC_LINKING=ON TEST_ARGS="--gtest_filter=-codegen.string_equal_comparison:codegen.string_not_equal_comparison"
diff --git a/docker/Dockerfile.bionic-llvm8 b/docker/Dockerfile.bionic-llvm8
new file mode 100644
index 0000000..ebf10d3
--- /dev/null
+++ b/docker/Dockerfile.bionic-llvm8
@@ -0,0 +1,36 @@
+FROM ubuntu:bionic
+
+ENV llvmVersion=8
+
+RUN apt-get update && apt-get install -y curl gnupg &&\
+ llvmRepository='\n\
+deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic main\n\
+deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic main\n\
+# 8\n\
+deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main\n\
+deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main' && \
+ echo $llvmRepository >> /etc/apt/sources.list && \
+ curl -L https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - && \
+ apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 4052245BD4284CDD && \
+ echo "deb https://repo.iovisor.org/apt/bionic bionic main" | tee /etc/apt/sources.list.d/iovisor.list
+
+RUN apt-get update && apt-get install -y \
+ bison \
+ cmake \
+ flex \
+ g++ \
+ git \
+ libelf-dev \
+ zlib1g-dev \
+ libbcc \
+ clang-${llvmVersion} \
+ libclang-${llvmVersion}-dev \
+ libclang-common-${llvmVersion}-dev \
+ libclang1-${llvmVersion} \
+ llvm-${llvmVersion} \
+ llvm-${llvmVersion}-dev \
+ llvm-${llvmVersion}-runtime \
+ libllvm${llvmVersion}
+
+COPY build.sh /build.sh
+ENTRYPOINT ["bash", "/build.sh"]
diff --git a/src/bpforc.h b/src/bpforc.h
index 1c134d0..8eede31 100644
--- a/src/bpforc.h
+++ b/src/bpforc.h
@@ -80,8 +80,13 @@ class BpfOrc
ExecutionSession ES;
std::unique_ptr<TargetMachine> TM;
std::shared_ptr<SymbolResolver> Resolver;
+#if LLVM_VERSION_MAJOR >= 8
+ LegacyRTDyldObjectLinkingLayer ObjectLayer;
+ LegacyIRCompileLayer<decltype(ObjectLayer), SimpleCompiler> CompileLayer;
+#else
RTDyldObjectLinkingLayer ObjectLayer;
IRCompileLayer<decltype(ObjectLayer), SimpleCompiler> CompileLayer;
+#endif
public:
std::map<std::string, std::tuple<uint8_t *, uintptr_t>> sections_;
@@ -91,7 +96,11 @@ class BpfOrc
Resolver(createLegacyLookupResolver(ES,
[](const std::string &Name __attribute__((unused))) -> JITSymbol { return nullptr; },
[](Error Err) { cantFail(std::move(Err), "lookup failed"); })),
+#if LLVM_VERSION_MAJOR >= 8
+ ObjectLayer(ES, [this](VModuleKey) { return LegacyRTDyldObjectLinkingLayer::Resources{std::make_shared<MemoryManager>(sections_), Resolver}; }),
+#else
ObjectLayer(ES, [this](VModuleKey) { return RTDyldObjectLinkingLayer::Resources{std::make_shared<MemoryManager>(sections_), Resolver}; }),
+#endif
CompileLayer(ObjectLayer, SimpleCompiler(*TM)) {}
void compileModule(std::unique_ptr<Module> M) {
diff --git a/src/clang_parser.cpp b/src/clang_parser.cpp
index 4bb8f87..7bb8d6a 100644
--- a/src/clang_parser.cpp
+++ b/src/clang_parser.cpp
@@ -1,5 +1,7 @@
#include <clang-c/Index.h>
#include <iostream>
+#include <unordered_map>
+#include <unordered_set>
#include <string.h>
#include <sys/utsname.h>
#include <sys/stat.h>
@@ -13,6 +15,9 @@
namespace bpftrace {
+std::unordered_map<std::string, CXCursor> indirect_structs;
+std::unordered_set<std::string> unvisited_indirect_structs;
+
static std::string get_clang_string(CXString string)
{
std::string str = clang_getCString(string);
@@ -30,8 +35,9 @@ static CXCursor get_indirect_field_parent_struct(CXCursor c)
{
CXCursor parent = clang_getCursorSemanticParent(c);
- while (!clang_Cursor_isNull(parent) && clang_Cursor_isAnonymous(parent))
- parent = clang_getCursorSemanticParent(parent);
+ while (!clang_Cursor_isNull(parent) && indirect_structs.count(get_clang_string(clang_getTypeSpelling(clang_getCanonicalType(clang_getCursorType(parent))))) > 0) {
+ parent = clang_getCursorSemanticParent(parent);
+ }
return parent;
}
@@ -253,44 +259,69 @@ void ClangParser::parse(ast::Program *program, BPFtrace &bpftrace)
std::cerr << "Input (" << input.size() << "): " << input << std::endl;
}
- CXCursor cursor = clang_getTranslationUnitCursor(translation_unit);
+ indirect_structs.clear();
+ unvisited_indirect_structs.clear();
- clang_visitChildren(
- cursor,
- [](CXCursor c, CXCursor parent, CXClientData client_data)
- {
+ CXCursor cursor = clang_getTranslationUnitCursor(translation_unit);
- if (clang_getCursorKind(parent) != CXCursor_StructDecl &&
- clang_getCursorKind(parent) != CXCursor_UnionDecl)
- return CXChildVisit_Recurse;
+ bool iterate = true;
- if (clang_getCursorKind(c) == CXCursor_FieldDecl)
+ do {
+ clang_visitChildren(
+ cursor,
+ [](CXCursor c, CXCursor parent, CXClientData client_data)
{
- auto &structs = static_cast<BPFtrace*>(client_data)->structs_;
- auto struct_name = get_parent_struct_name(c);
- auto ident = get_clang_string(clang_getCursorSpelling(c));
- auto offset = clang_Cursor_getOffsetOfField(c) / 8;
- auto type = clang_getCanonicalType(clang_getCursorType(c));
+ if (clang_getCursorKind(parent) != CXCursor_StructDecl &&
+ clang_getCursorKind(parent) != CXCursor_UnionDecl)
+ return CXChildVisit_Recurse;
auto ptype = clang_getCanonicalType(clang_getCursorType(parent));
auto ptypestr = get_clang_string(clang_getTypeSpelling(ptype));
auto ptypesize = clang_Type_getSizeOf(ptype);
- if(clang_Cursor_isAnonymous(parent))
- offset = get_indirect_field_offset(c);
+ if (clang_getCursorKind(c) == CXCursor_StructDecl ||
+ clang_getCursorKind(c) == CXCursor_UnionDecl) {
+ auto struct_name = get_clang_string(clang_getTypeSpelling(clang_getCanonicalType(clang_getCursorType(c))));
+ indirect_structs[struct_name] = c;
+ unvisited_indirect_structs.insert(struct_name);
- if (struct_name == "")
- struct_name = ptypestr;
- remove_struct_prefix(struct_name);
+ return CXChildVisit_Continue;
+ }
- structs[struct_name].fields[ident].offset = offset;
- structs[struct_name].fields[ident].type = get_sized_type(type);
- structs[struct_name].size = ptypesize;
- }
+ if (clang_getCursorKind(c) == CXCursor_FieldDecl)
+ {
+ auto &structs = static_cast<BPFtrace*>(client_data)->structs_;
+ auto struct_name = get_parent_struct_name(c);
+ auto ident = get_clang_string(clang_getCursorSpelling(c));
+ auto offset = clang_Cursor_getOffsetOfField(c) / 8;
+ auto type = clang_getCanonicalType(clang_getCursorType(c));
+ auto typestr = get_clang_string(clang_getTypeSpelling(type));
- return CXChildVisit_Recurse;
- },
- &bpftrace);
+ if (indirect_structs.count(typestr))
+ indirect_structs.erase(typestr);
+
+ if(indirect_structs.count(ptypestr))
+ offset = get_indirect_field_offset(c);
+
+ if (struct_name == "")
+ struct_name = ptypestr;
+ remove_struct_prefix(struct_name);
+
+ structs[struct_name].fields[ident].offset = offset;
+ structs[struct_name].fields[ident].type = get_sized_type(type);
+ structs[struct_name].size = ptypesize;
+ }
+
+ return CXChildVisit_Recurse;
+ },
+ &bpftrace);
+ if (unvisited_indirect_structs.size()) {
+ cursor = indirect_structs[*unvisited_indirect_structs.begin()];
+ unvisited_indirect_structs.erase(unvisited_indirect_structs.begin());
+ } else {
+ iterate = false;
+ }
+ } while (iterate);
clang_disposeTranslationUnit(translation_unit);
clang_disposeIndex(index);
--
2.20.1

356
SOURCES/bpftrace-0.9-clang_parser-pass-BPFtrace-as-arg-instead-of-StructM.patch
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@ -1,356 +0,0 @@
From 5143209e8744d242431229972d9affa32ba3cc1a Mon Sep 17 00:00:00 2001
From: Matheus Marchini <mat@mmarchini.me>
Date: Fri, 12 Apr 2019 16:27:51 -0700
Subject: [PATCH 1/3] [clang_parser] pass BPFtrace as arg instead of StructMap
---
src/clang_parser.cpp | 6 +--
src/clang_parser.h | 3 +-
src/main.cpp | 2 +-
tests/clang_parser.cpp | 71 +++++++++++++++++++++++------------
tests/codegen/call_kstack.cpp | 4 +-
tests/codegen/call_ustack.cpp | 4 +-
tests/codegen/common.h | 2 +-
tests/codegen/general.cpp | 2 +-
tests/probe.cpp | 2 +-
tests/semantic_analyser.cpp | 2 +-
10 files changed, 61 insertions(+), 37 deletions(-)
diff --git a/src/clang_parser.cpp b/src/clang_parser.cpp
index b1db8ff..4bb8f87 100644
--- a/src/clang_parser.cpp
+++ b/src/clang_parser.cpp
@@ -172,7 +172,7 @@ static std::tuple<std::string, std::string> get_kernel_dirs(const struct utsname
return std::make_tuple(ksrc, kobj);
}
-void ClangParser::parse(ast::Program *program, StructMap &structs)
+void ClangParser::parse(ast::Program *program, BPFtrace &bpftrace)
{
auto input = program->c_definitions;
if (input.size() == 0)
@@ -259,7 +259,6 @@ void ClangParser::parse(ast::Program *program, StructMap &structs)
cursor,
[](CXCursor c, CXCursor parent, CXClientData client_data)
{
- auto &structs = *static_cast<StructMap*>(client_data);
if (clang_getCursorKind(parent) != CXCursor_StructDecl &&
clang_getCursorKind(parent) != CXCursor_UnionDecl)
@@ -267,6 +266,7 @@ void ClangParser::parse(ast::Program *program, StructMap &structs)
if (clang_getCursorKind(c) == CXCursor_FieldDecl)
{
+ auto &structs = static_cast<BPFtrace*>(client_data)->structs_;
auto struct_name = get_parent_struct_name(c);
auto ident = get_clang_string(clang_getCursorSpelling(c));
auto offset = clang_Cursor_getOffsetOfField(c) / 8;
@@ -290,7 +290,7 @@ void ClangParser::parse(ast::Program *program, StructMap &structs)
return CXChildVisit_Recurse;
},
- &structs);
+ &bpftrace);
clang_disposeTranslationUnit(translation_unit);
clang_disposeIndex(index);
diff --git a/src/clang_parser.h b/src/clang_parser.h
index d2ada5d..4289796 100644
--- a/src/clang_parser.h
+++ b/src/clang_parser.h
@@ -1,6 +1,7 @@
#pragma once
#include "struct.h"
+#include "bpftrace.h"
namespace bpftrace {
@@ -11,7 +12,7 @@ using StructMap = std::map<std::string, Struct>;
class ClangParser
{
public:
- void parse(ast::Program *program, StructMap &structs);
+ void parse(ast::Program *program, BPFtrace &bpftrace);
};
} // namespace bpftrace
diff --git a/src/main.cpp b/src/main.cpp
index ec3882d..f6659bf 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -272,7 +272,7 @@ int main(int argc, char *argv[])
}
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
err = semantics.analyse();
diff --git a/tests/clang_parser.cpp b/tests/clang_parser.cpp
index f12a5e4..0c1ca31 100644
--- a/tests/clang_parser.cpp
+++ b/tests/clang_parser.cpp
@@ -1,25 +1,28 @@
#include "gtest/gtest.h"
#include "clang_parser.h"
#include "driver.h"
+#include "bpftrace.h"
namespace bpftrace {
namespace test {
namespace clang_parser {
-void parse(const std::string &input, StructMap &structs)
+void parse(const std::string &input, BPFtrace &bpftrace)
{
auto extended_input = input + "kprobe:sys_read { 1 }";
Driver driver;
ASSERT_EQ(driver.parse_str(extended_input), 0);
ClangParser clang;
- clang.parse(driver.root_, structs);
+ clang.parse(driver.root_, bpftrace);
}
TEST(clang_parser, integers)
{
- StructMap structs;
- parse("struct Foo { int x; int y, z; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { int x; int y, z; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 1U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -45,8 +48,10 @@ TEST(clang_parser, integers)
TEST(clang_parser, c_union)
{
- StructMap structs;
- parse("union Foo { char c; short s; int i; long l; }", structs);
+ BPFtrace bpftrace;
+ parse("union Foo { char c; short s; int i; long l; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 1U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -77,8 +82,10 @@ TEST(clang_parser, c_union)
TEST(clang_parser, integer_ptr)
{
- StructMap structs;
- parse("struct Foo { int *x; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { int *x; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 1U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -96,8 +103,10 @@ TEST(clang_parser, integer_ptr)
TEST(clang_parser, string_ptr)
{
- StructMap structs;
- parse("struct Foo { char *str; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { char *str; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 1U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -115,8 +124,10 @@ TEST(clang_parser, string_ptr)
TEST(clang_parser, string_array)
{
- StructMap structs;
- parse("struct Foo { char str[32]; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { char str[32]; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 1U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -132,8 +143,10 @@ TEST(clang_parser, string_array)
TEST(clang_parser, nested_struct_named)
{
- StructMap structs;
- parse("struct Bar { int x; } struct Foo { struct Bar bar; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Bar { int x; } struct Foo { struct Bar bar; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 2U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -151,8 +164,10 @@ TEST(clang_parser, nested_struct_named)
TEST(clang_parser, nested_struct_ptr_named)
{
- StructMap structs;
- parse("struct Bar { int x; } struct Foo { struct Bar *bar; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Bar { int x; } struct Foo { struct Bar *bar; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 2U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -172,8 +187,10 @@ TEST(clang_parser, nested_struct_ptr_named)
TEST(clang_parser, nested_struct_anon)
{
- StructMap structs;
- parse("struct Foo { struct { int x; } bar; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { struct { int x; } bar; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.size(), 2U);
ASSERT_EQ(structs.count("Foo"), 1U);
@@ -190,8 +207,10 @@ TEST(clang_parser, nested_struct_anon)
TEST(clang_parser, nested_struct_indirect_fields)
{
- StructMap structs;
- parse("struct Foo { struct { int x; int y;}; int a; struct { int z; }; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { struct { int x; int y;}; int a; struct { int z; }; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs["Foo"].fields.size(), 4U);
EXPECT_EQ(structs["Foo"].fields["x"].offset, 0);
@@ -206,8 +225,10 @@ TEST(clang_parser, nested_struct_indirect_fields)
TEST(clang_parser, nested_struct_anon_union_struct)
{
- StructMap structs;
- parse("struct Foo { union { long long _xy; struct { int x; int y;}; }; int a; struct { int z; }; }", structs);
+ BPFtrace bpftrace;
+ parse("struct Foo { union { long long _xy; struct { int x; int y;}; }; int a; struct { int z; }; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs["Foo"].fields.size(), 5U);
EXPECT_EQ(structs["Foo"].fields["_xy"].offset, 0);
@@ -225,8 +246,10 @@ TEST(clang_parser, nested_struct_anon_union_struct)
TEST(clang_parser, builtin_headers)
{
// size_t is definied in stddef.h
- StructMap structs;
- parse("#include <stddef.h>\nstruct Foo { size_t x, y, z; }", structs);
+ BPFtrace bpftrace;
+ parse("#include <stddef.h>\nstruct Foo { size_t x, y, z; }", bpftrace);
+
+ StructMap &structs = bpftrace.structs_;
ASSERT_EQ(structs.count("Foo"), 1U);
diff --git a/tests/codegen/call_kstack.cpp b/tests/codegen/call_kstack.cpp
index a184af2..e64d498 100644
--- a/tests/codegen/call_kstack.cpp
+++ b/tests/codegen/call_kstack.cpp
@@ -68,7 +68,7 @@ TEST(codegen, call_kstack_mapids)
ASSERT_EQ(driver.parse_str("kprobe:f { @x = kstack(5); @y = kstack(6); @z = kstack(6) }"), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
@@ -96,7 +96,7 @@ TEST(codegen, call_kstack_modes_mapids)
ASSERT_EQ(driver.parse_str("kprobe:f { @x = kstack(perf); @y = kstack(bpftrace); @z = kstack() }"), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
diff --git a/tests/codegen/call_ustack.cpp b/tests/codegen/call_ustack.cpp
index 8e80558..1941d36 100644
--- a/tests/codegen/call_ustack.cpp
+++ b/tests/codegen/call_ustack.cpp
@@ -74,7 +74,7 @@ TEST(codegen, call_ustack_mapids)
ASSERT_EQ(driver.parse_str("kprobe:f { @x = ustack(5); @y = ustack(6); @z = ustack(6) }"), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
@@ -102,7 +102,7 @@ TEST(codegen, call_ustack_modes_mapids)
ASSERT_EQ(driver.parse_str("kprobe:f { @x = ustack(perf); @y = ustack(bpftrace); @z = ustack() }"), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
diff --git a/tests/codegen/common.h b/tests/codegen/common.h
index 32f8bc8..bdf733a 100644
--- a/tests/codegen/common.h
+++ b/tests/codegen/common.h
@@ -30,7 +30,7 @@ static void test(const std::string &input, const std::string expected_output)
ASSERT_EQ(driver.parse_str(input), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
diff --git a/tests/codegen/general.cpp b/tests/codegen/general.cpp
index e7e7439..e67ae10 100644
--- a/tests/codegen/general.cpp
+++ b/tests/codegen/general.cpp
@@ -45,7 +45,7 @@ TEST(codegen, printf_offsets)
// TODO (mmarchini): also test printf with a string argument
ASSERT_EQ(driver.parse_str("struct Foo { char c; int i; } kprobe:f { $foo = (Foo*)0; printf(\"%c %u\\n\", $foo->c, $foo->i) }"), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
ASSERT_EQ(semantics.create_maps(true), 0);
diff --git a/tests/probe.cpp b/tests/probe.cpp
index e030830..cb9b765 100644
--- a/tests/probe.cpp
+++ b/tests/probe.cpp
@@ -28,7 +28,7 @@ void gen_bytecode(const std::string &input, std::stringstream &out)
ASSERT_EQ(driver.parse_str(input), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
ast::SemanticAnalyser semantics(driver.root_, bpftrace);
ASSERT_EQ(semantics.analyse(), 0);
diff --git a/tests/semantic_analyser.cpp b/tests/semantic_analyser.cpp
index 2067ed9..4e2485b 100644
--- a/tests/semantic_analyser.cpp
+++ b/tests/semantic_analyser.cpp
@@ -16,7 +16,7 @@ void test(BPFtrace &bpftrace, Driver &driver, const std::string &input, int expe
ASSERT_EQ(driver.parse_str(input), 0);
ClangParser clang;
- clang.parse(driver.root_, bpftrace.structs_);
+ clang.parse(driver.root_, bpftrace);
std::stringstream out;
ast::SemanticAnalyser semantics(driver.root_, bpftrace, out);
--
2.20.1

32
SOURCES/bpftrace-0.9-fix-struct-definition-from-headers.patch
View File

@ -1,32 +0,0 @@
From 151351ea22c855e4e605b8fd2058c19dc4ae5ed6 Mon Sep 17 00:00:00 2001
From: Matheus Marchini <mat@mmarchini.me>
Date: Tue, 16 Apr 2019 12:06:01 -0700
Subject: [PATCH 2/2] fix struct definition from headers
Regression caused by iovisor/bpftrace@80ce138c7. With the changes on how
we identify the parent struct, we ended up with our parent cursor in the
header file sometimes instead of a valid cursor. This PR checks if the
parent cursor is a struct, otherwise returns an empty string and let the
caller handle the situation (which is similar to the previous behavior).
---
src/clang_parser.cpp | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/src/clang_parser.cpp b/src/clang_parser.cpp
index b1db8ff..b787b67 100644
--- a/src/clang_parser.cpp
+++ b/src/clang_parser.cpp
@@ -40,6 +40,10 @@ static std::string get_parent_struct_name(CXCursor c)
{
CXCursor parent = get_indirect_field_parent_struct(c);
+ if (clang_getCursorKind(parent) != CXCursor_StructDecl &&
+ clang_getCursorKind(parent) != CXCursor_UnionDecl)
+ return "";
+
return get_clang_string(clang_getCursorSpelling(parent));
}
--
2.20.1

0
SOURCES/bpftrace-0.9-RHEL-8-fixes.patch → SOURCES/bpftrace-0.9.2-RHEL-8-fixes.patch
View File

21
SPECS/bpftrace.spec
View File

@ -1,18 +1,14 @@
%bcond_without llvm_static
Name: bpftrace
Version: 0.9
Release: 3%{?dist}
Version: 0.9.2
Release: 1%{?dist}
Summary: High-level tracing language for Linux eBPF
License: ASL 2.0
URL: https://github.com/iovisor/bpftrace
Source0: %{url}/archive/v%{version}/%{name}-%{version}.tar.gz
Patch0: %{name}-%{version}-clang_parser-pass-BPFtrace-as-arg-instead-of-StructM.patch
Patch1: %{name}-%{version}-clang_parser-fix-clang_parser-for-LLVM-8.patch
Patch2: %{name}-%{version}-fix-struct-definition-from-headers.patch
Patch3: %{name}-%{version}-RHEL-8-fixes.patch
Patch4: %{name}-%{version}-Ban-kprobes-that-cause-CPU-deadlocks.patch
Patch0: %{name}-%{version}-RHEL-8-fixes.patch
# Arches will be included as upstream support is added and dependencies are
# satisfied in the respective arches
@ -50,8 +46,8 @@ and predecessor tracers such as DTrace and SystemTap
%cmake . \
-DCMAKE_BUILD_TYPE=RelWithDebInfo \
-DBUILD_TESTING:BOOL=OFF \
-DBUILD_SHARED_LIBS:BOOL=OFF \
-DLLVM_DIR=/usr/lib64/llvm7.0/lib/cmake/llvm/
-DBUILD_SHARED_LIBS:BOOL=OFF
# -DLLVM_DIR=/usr/lib64/llvm7.0/lib/cmake/llvm/
%make_build
@ -81,10 +77,13 @@ mv %{buildroot}%{_prefix}/man/* %{buildroot}%{_mandir}/
%changelog
* Tue Jun 18 2019 Jerome Marchand <jmarchan@redhat.com> - 0.9.3
* Fri Nov 08 2019 Jerome Marchand <jmarchan@redhat.com> - 0.9.2-1
- Rebase on bpftrace 0.9.2
* Tue Jun 18 2019 Jerome Marchand <jmarchan@redhat.com> - 0.9-3
- Don't allow to raw_spin_lock* kprobes that can deadlock the kernel.
* Wed Jun 12 2019 Jerome Marchand <jmarchan@redhat.com> - 0.9.2
* Wed Jun 12 2019 Jerome Marchand <jmarchan@redhat.com> - 0.9-2
- Fixes gethostlatency
- Fixes a struct definition issue that made several tools fail
- Add CI gating