how to use mimalloc in bazel project

[viktorika]

i use bazel's malloc option to link mimalloc，and the compilation of mimaloc is as follows

cc_library(
name = "mimalloc",
srcs = [
"src/static.c",
],
textual_hdrs = glob(["src/.c", "src/.h"], exclude = ["src/static.c"]),
hdrs = glob(["include/*.h"]),
includes = ["include"],
copts = [
"-DMI_MALLOC_OVERRIDE",
"-O2",
"-Wall",
"-Wextra",
"--std=c++17",
],
linkopts = [
"-pthread",
"-lrt",
],
visibility = ["//visibility:public"],
)

because of the global variable initialization order，i find i can't control mi_process_load function execute before mi_malloc，What should I do?

[daanx]

Hi, the options seem ok where you link mimalloc statically with overriding. What is the exact problem? It should be the case mi_process_load is called first if possible when trying to override malloc/free so no one will allocate before mimalloc is initialized. What happens in your case?

[viktorika]

Now i want to use it in my server，but my server's framework has many global variable，when i use bazel's malloc option to link mimalloc，it will call abort after running server。I use gdb debug then found the reason is that the mi_process_load is called after mi_malloc，i can't find a way to call mi_process_load first。

[daanx]

Overriding malloc/free is always a bit tricky -- did you read the Overriding section carefully?

What OS are you targeting ? What compiler are you using ? Maybe dynamic overriding can work better?

I guess you use C++ and the static initializers allocate memory (maybe by calling atexit for the destructors) before main runs. However, mimalloc should handle that fine and initialize; so I need more info what is going wrong.

[viktorika]

My environment is Linux，gcc7。And static override as follow。
cc_binary(
name = "main",
srcs = [
"main.cc",
],
malloc = ":mimalloc",
deps = [
'//comm2/summer:summer',
'//comm2/svrkit:svrkitepoll',
'//comm2/svrkit:svrkit_pb',
'//comm2/tlvpickle:skbuiltintype',
],
copts = [
'-O2',
'-Wall',
'-Wextra',
'-Werror',
'--std=c++17',
],
visibility = ["//visibility:public"],
)

I'll try dynamic link when I'm free。

[viktorika]

oh，i can't link with the library，it is ok that link the final program with the single object file