musl: base: Remove use of mallinfo

src/base/process/process_metrics_posix.cc

@@ -112,6 +112,9 @@ void IncreaseFdLimitTo(unsigned int max_descriptors) {
 namespace {
 
 size_t GetMallocUsageMallinfo() {
+#if defined(__MUSL__)
+  return 0;
+#else
 #if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
 #if __GLIBC_PREREQ(2, 33)
 #define MALLINFO2_FOUND_IN_LIBC
@@ -123,6 +126,7 @@ size_t GetMallocUsageMallinfo() {
 #endif
 #undef MALLINFO2_FOUND_IN_LIBC
   return checked_cast<size_t>(minfo.hblkhd + minfo.arena);
+#endif
 }
 
 }  // namespace

src/base/trace_event/malloc_dump_provider.cc

@@ -261,7 +261,7 @@ void ReportAppleAllocStats(size_t* total_virtual_size,
 
 #if (PA_BUILDFLAG(USE_PARTITION_ALLOC_AS_MALLOC) && BUILDFLAG(IS_ANDROID)) || \
     (!PA_BUILDFLAG(USE_PARTITION_ALLOC_AS_MALLOC) && !BUILDFLAG(IS_WIN) &&    \
-     !BUILDFLAG(IS_APPLE) && !BUILDFLAG(IS_FUCHSIA))
+     !BUILDFLAG(IS_APPLE) && !BUILDFLAG(IS_FUCHSIA) && !defined(__MUSL__))
 void ReportMallinfoStats(ProcessMemoryDump* pmd,
                          size_t* total_virtual_size,
                          size_t* resident_size,
@@ -510,6 +510,7 @@ bool MallocDumpProvider::OnMemoryDump(const MemoryDumpArgs& args,
                      nullptr);
 #elif BUILDFLAG(IS_FUCHSIA)
 // TODO(fuchsia): Port, see https://crbug.com/706592.
+#elif defined(__MUSL__)
 #else
   ReportMallinfoStats(/*pmd=*/nullptr, &total_virtual_size, &resident_size,
                       &allocated_objects_size, &allocated_objects_count);