diff options
Diffstat (limited to 'absl/base/internal/low_level_alloc.cc')
| -rw-r--r-- | absl/base/internal/low_level_alloc.cc | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/absl/base/internal/low_level_alloc.cc b/absl/base/internal/low_level_alloc.cc index 662167b0..f8c4336f 100644 --- a/absl/base/internal/low_level_alloc.cc +++ b/absl/base/internal/low_level_alloc.cc @@ -42,6 +42,10 @@ #include <windows.h> #endif +#ifdef __linux__ +#include <sys/prctl.h> +#endif + #include <string.h> #include <algorithm> #include <atomic> @@ -550,7 +554,7 @@ static void *DoAllocWithArena(size_t request, LowLevelAlloc::Arena *arena) { size_t new_pages_size = RoundUp(req_rnd, arena->pagesize * 16); void *new_pages; #ifdef _WIN32 - new_pages = VirtualAlloc(0, new_pages_size, + new_pages = VirtualAlloc(nullptr, new_pages_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); ABSL_RAW_CHECK(new_pages != nullptr, "VirtualAlloc failed"); #else @@ -570,6 +574,18 @@ static void *DoAllocWithArena(size_t request, LowLevelAlloc::Arena *arena) { ABSL_RAW_LOG(FATAL, "mmap error: %d", errno); } +#ifdef __linux__ +#if defined(PR_SET_VMA) && defined(PR_SET_VMA_ANON_NAME) + // Attempt to name the allocated address range in /proc/$PID/smaps on + // Linux. + // + // This invocation of prctl() may fail if the Linux kernel was not + // configured with the CONFIG_ANON_VMA_NAME option. This is OK since + // the naming of arenas is primarily a debugging aid. + prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, new_pages, new_pages_size, + "absl"); +#endif +#endif // __linux__ #endif // _WIN32 arena->mu.Lock(); s = reinterpret_cast<AllocList *>(new_pages); |