musl does not implement mallinfo()/mallinfo2()
(or rather, malloc-ng, musl's allocator, doesn't)
--
--- a/base/trace_event/malloc_dump_provider.cc
+++ b/base/trace_event/malloc_dump_provider.cc
@@ -185,7 +185,6 @@
 #define MALLINFO2_FOUND_IN_LIBC
   struct mallinfo2 info = mallinfo2();
 #endif
-#endif  // defined(__GLIBC__) && defined(__GLIBC_PREREQ)
 #if !defined(MALLINFO2_FOUND_IN_LIBC)
   struct mallinfo info = mallinfo();
 #endif
@@ -205,6 +204,7 @@
     sys_alloc_dump->AddScalar(MemoryAllocatorDump::kNameSize,
                               MemoryAllocatorDump::kUnitsBytes, info.uordblks);
   }
+#endif  // defined(__GLIBC__) && defined(__GLIBC_PREREQ)
 }
 #endif
 
@@ -339,7 +340,7 @@
                      &allocated_objects_count);
 #elif BUILDFLAG(IS_FUCHSIA)
 // TODO(fuchsia): Port, see https://crbug.com/706592.
-#else
+#elif defined(__GLIBC__)
   ReportMallinfoStats(/*pmd=*/nullptr, &total_virtual_size, &resident_size,
                       &allocated_objects_size, &allocated_objects_count);
 #endif
--- a/base/process/process_metrics_posix.cc
+++ b/base/process/process_metrics_posix.cc
@@ -105,7 +105,7 @@
 
 #endif  // !BUILDFLAG(IS_FUCHSIA)
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#if (BUILDFLAG(IS_LINUX) && defined(__GLIBC__)) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
 namespace {
 
 size_t GetMallocUsageMallinfo() {
@@ -123,7 +123,7 @@
 }
 
 }  // namespace
-#endif  // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) ||
+#endif  // (BUILDFLAG(IS_LINUX) && defined(__GLIBC__)) || BUILDFLAG(IS_CHROMEOS) ||
         // BUILDFLAG(IS_ANDROID)
 
 size_t ProcessMetrics::GetMallocUsage() {
@@ -131,9 +131,9 @@
   malloc_statistics_t stats = {0};
   malloc_zone_statistics(nullptr, &stats);
   return stats.size_in_use;
-#elif BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
+#elif (BUILDFLAG(IS_LINUX) && defined(__GLIBC__)) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID)
   return GetMallocUsageMallinfo();
-#elif BUILDFLAG(IS_FUCHSIA)
+#else
   // TODO(fuchsia): Not currently exposed. https://crbug.com/735087.
   return 0;
 #endif
--- ./third_party/tflite/src/tensorflow/lite/profiling/memory_info.cc.orig
+++ ./third_party/tflite/src/tensorflow/lite/profiling/memory_info.cc
@@ -35,7 +35,7 @@
 
 MemoryUsage GetMemoryUsage() {
   MemoryUsage result;
-#ifdef __linux__
+#if defined(__linux__) && defined(__GLIBC__)
   rusage res;
   if (getrusage(RUSAGE_SELF, &res) == 0) {
     result.max_rss_kb = res.ru_maxrss;
--- ./third_party/swiftshader/third_party/llvm-subzero/lib/Support/Unix/Process.inc
+++ ./third_party/swiftshader/third_party/llvm-subzero/lib/Support/Unix/Process.inc.orig
@@ -86,11 +86,11 @@
 }

 size_t Process::GetMallocUsage() {
-#if defined(HAVE_MALLINFO2)
+#if defined(HAVE_MALLINFO2) && defined(__GLIBC__)
   struct mallinfo2 mi;
   mi = ::mallinfo2();
   return mi.uordblks;
-#elif defined(HAVE_MALLINFO)
+#elif defined(HAVE_MALLINFO) && defined(__GLIBC__)
   struct mallinfo mi;
   mi = ::mallinfo();
   return mi.uordblks;

--- ./third_party/swiftshader/third_party/llvm-10.0/configs/linux/include/llvm/Config/config.h.orig	2019-09-30 13:03:42.556880537 -0400
+++ ./third_party/swiftshader/third_party/llvm-10.0/configs/linux/include/llvm/Config/config.h	2019-09-30 13:07:27.989821227 -0400
@@ -122,7 +122,9 @@
 /* #undef HAVE_MALLCTL */
 
 /* Define to 1 if you have the `mallinfo' function. */
+#if defined(__GLIBC__)
 #define HAVE_MALLINFO 1
+#endif
 
 /* Define to 1 if you have the <malloc.h> header file. */
 #define HAVE_MALLOC_H 1
--- a/base/allocator/partition_allocator/shim/allocator_shim_default_dispatch_to_partition_alloc.cc
+++ b/base/allocator/partition_allocator/shim/allocator_shim_default_dispatch_to_partition_alloc.cc
@@ -717,7 +717,7 @@
 
 #endif  // !BUILDFLAG(IS_APPLE) && !BUILDFLAG(IS_ANDROID)
 
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if 0
 SHIM_ALWAYS_EXPORT struct mallinfo mallinfo(void) __THROW {
   base::SimplePartitionStatsDumper allocator_dumper;
   Allocator()->DumpStats("malloc", true, &allocator_dumper);
--- a/base/allocator/partition_allocator/shim/allocator_shim_default_dispatch_to_partition_alloc_unittest.cc
+++ b/base/allocator/partition_allocator/shim/allocator_shim_default_dispatch_to_partition_alloc_unittest.cc
@@ -24,7 +24,7 @@
 #if BUILDFLAG(USE_PARTITION_ALLOC_AS_MALLOC)
 
 // Platforms on which we override weak libc symbols.
-#if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
+#if (BUILDFLAG(IS_LINUX) && defined(__GLIBC__)) || BUILDFLAG(IS_CHROMEOS)
 
 NOINLINE void FreeForTest(void* data) {
   free(data);