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Add mprotect syscall benchmark

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Specific parameters were chosen based on the frequency of their use in
Android.

Bug: 327496587
Test: local build and run
Change-Id: Iec225109f62e1e9cde133863d3cee8103172a6c8
Signed-off-by: Carlos Galo <carlosgalo@google.com>
This commit is contained in:
Carlos Galo 2024-02-28 23:07:38 +00:00
parent fb7dd9dd85
commit f86d29cc49
2 changed files with 196 additions and 0 deletions
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41
benchmarks/suites/syscall.xml
View file

@ -50,3 +50,44 @@
<args>AT_MULTI_PAGE_SIZES</args>
</fn>
<!-- mprotect tests -->
<fn>
<name>BM_syscall_mmap_anon_mprotect_rw_to_rd</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_anon_mprotect_rw_to_none</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_anon_mprotect_rd_to_none</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_file_mprotect_rw_to_rd</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_file_mprotect_rw_to_none</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_file_mprotect_none_to_rw</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_file_mprotect_none_to_rd</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>
<fn>
<name>BM_syscall_mmap_file_mprotect_rd_to_none</name>
<iterations>10</iterations>
<args>AT_All_PAGE_SIZES</args>
</fn>

155
benchmarks/syscall_mm_benchmark.cpp
View file

@ -38,6 +38,12 @@ struct MmapParams {
int64_t size;
};
struct MprotectParams {
int from_prot;
int to_prot;
int64_t size;
};
template <BenchmarkType type>
void MmapBenchmarkImpl(benchmark::State& state, const struct MmapParams& params, int fd,
void* area = nullptr) {
@ -307,3 +313,152 @@ static void BM_syscall_mmap_anon_madvise_free(benchmark::State& state) {
MadviseBenchmark(state, params, MADV_FREE);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_anon_madvise_free, "AT_MULTI_PAGE_SIZES");
void MprotectBenchmark(benchmark::State& state, const struct MprotectParams& params, void* addr) {
for (auto _ : state) {
state.PauseTiming();
/*
* Guarantee that physical memory pages are allocated for this region to prevent
* segmentation fault when using mprotect to change permissions.
*/
if (params.from_prot & PROT_WRITE) {
MakeAllocationResident(addr, params.size, page_sz);
}
state.ResumeTiming();
if (mprotect(addr, params.size, params.to_prot) != 0) {
state.SkipWithError(android::base::StringPrintf("mprotect failed: %m"));
break;
}
state.PauseTiming();
// Revert back to the original protection
int res = mprotect(addr, params.size, params.from_prot);
state.ResumeTiming();
if (res != 0) {
state.SkipWithError(
android::base::StringPrintf("mprotect failed to revert to original prot: %m"));
break;
}
}
}
static void MprotectBenchmarkWithMmapAnon(benchmark::State& state,
const struct MprotectParams& params) {
void* addr = mmap(nullptr, params.size, params.from_prot, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
if (addr == MAP_FAILED) {
state.SkipWithError(android::base::StringPrintf("mmap failed: %m"));
return;
}
MprotectBenchmark(state, params, addr);
if (munmap(addr, params.size) != 0)
state.SkipWithError(android::base::StringPrintf("munmap failed: %m"));
}
static void BM_syscall_mmap_anon_mprotect_rw_to_rd(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_READ | PROT_WRITE,
.to_prot = PROT_READ,
.size = state.range(0),
};
MprotectBenchmarkWithMmapAnon(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_anon_mprotect_rw_to_rd, "AT_All_PAGE_SIZES");
static void BM_syscall_mmap_anon_mprotect_rw_to_none(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_READ | PROT_WRITE,
.to_prot = PROT_NONE,
.size = state.range(0),
};
MprotectBenchmarkWithMmapAnon(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_anon_mprotect_rw_to_none, "AT_All_PAGE_SIZES");
static void BM_syscall_mmap_anon_mprotect_rd_to_none(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_READ,
.to_prot = PROT_NONE,
.size = state.range(0),
};
MprotectBenchmarkWithMmapAnon(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_anon_mprotect_rd_to_none, "AT_All_PAGE_SIZES");
static void MprotectBenchmarkWithMmapFile(benchmark::State& state,
const struct MprotectParams& params) {
TemporaryFile tf;
if (tf.fd < 0) {
state.SkipWithError(android::base::StringPrintf("failed to create a temporary file: %m"));
return;
}
if (params.size > 0 && ftruncate(tf.fd, params.size)) {
state.SkipWithError(android::base::StringPrintf("ftruncate failed: %m"));
return;
}
void* addr = mmap(nullptr, params.size, params.from_prot, MAP_PRIVATE, tf.fd, 0);
if (addr == MAP_FAILED) {
state.SkipWithError(android::base::StringPrintf("mmap failed: %m"));
return;
}
MprotectBenchmark(state, params, addr);
if (munmap(addr, params.size) != 0)
state.SkipWithError(android::base::StringPrintf("munmap failed: %m"));
}
static void BM_syscall_mmap_file_mprotect_rw_to_rd(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_READ | PROT_WRITE,
.to_prot = PROT_READ,
.size = state.range(0),
};
MprotectBenchmarkWithMmapFile(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_file_mprotect_rw_to_rd, "AT_All_PAGE_SIZES");
static void BM_syscall_mmap_file_mprotect_rw_to_none(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_READ | PROT_WRITE,
.to_prot = PROT_NONE,
.size = state.range(0),
};
MprotectBenchmarkWithMmapFile(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_file_mprotect_rw_to_none, "AT_All_PAGE_SIZES");
static void BM_syscall_mmap_file_mprotect_none_to_rw(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_NONE,
.to_prot = PROT_READ | PROT_WRITE,
.size = state.range(0),
};
MprotectBenchmarkWithMmapFile(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_file_mprotect_none_to_rw, "AT_All_PAGE_SIZES");
static void BM_syscall_mmap_file_mprotect_none_to_rd(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_NONE,
.to_prot = PROT_READ,
.size = state.range(0),
};
MprotectBenchmarkWithMmapFile(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_file_mprotect_none_to_rd, "AT_All_PAGE_SIZES");
static void BM_syscall_mmap_file_mprotect_rd_to_none(benchmark::State& state) {
struct MprotectParams params = {
.from_prot = PROT_READ,
.to_prot = PROT_NONE,
.size = state.range(0),
};
MprotectBenchmarkWithMmapFile(state, params);
}
BIONIC_BENCHMARK_WITH_ARG(BM_syscall_mmap_file_mprotect_rd_to_none, "AT_All_PAGE_SIZES");