#define K_ATOS_ENV_VAR "__check_mach_ports_lookup"
+// This cannot live in `AtosSymbolizerProcess` because instances of that object
+// are allocated by the internal allocator which under ASan is poisoned with
+// kAsanInternalHeapMagic.
+static char kAtosMachPortEnvEntry[] = K_ATOS_ENV_VAR "=000000000000000";
+
class AtosSymbolizerProcess : public SymbolizerProcess {
public:
explicit AtosSymbolizerProcess(const char *path)
// We use `putenv()` rather than `setenv()` so that we can later directly
// write into the storage without LibC getting involved to change what the
// variable is set to
- int result = putenv(mach_port_env_var_entry_);
+ int result = putenv(kAtosMachPortEnvEntry);
CHECK_EQ(result, 0);
}
}
// for our task port. We can't call `setenv()` here because it might call
// malloc/realloc. To avoid that we instead update the
// `mach_port_env_var_entry_` variable with our current PID.
- uptr count = internal_snprintf(mach_port_env_var_entry_,
- sizeof(mach_port_env_var_entry_),
+ uptr count = internal_snprintf(kAtosMachPortEnvEntry,
+ sizeof(kAtosMachPortEnvEntry),
K_ATOS_ENV_VAR "=%s", pid_str_);
CHECK_GE(count, sizeof(K_ATOS_ENV_VAR) + internal_strlen(pid_str_));
// Document our assumption but without calling `getenv()` in normal
// builds.
+ DCHECK(getenv(K_ATOS_ENV_VAR));
DCHECK_EQ(internal_strcmp(getenv(K_ATOS_ENV_VAR), pid_str_), 0);
}
}
char pid_str_[16];
- // Space for `\0` in `kAtosEnvVar_` is reused for `=`.
- char mach_port_env_var_entry_[sizeof(K_ATOS_ENV_VAR) + sizeof(pid_str_)] =
- K_ATOS_ENV_VAR "=0";
+ // Space for `\0` in `K_ATOS_ENV_VAR` is reused for `=`.
+ static_assert(sizeof(kAtosMachPortEnvEntry) ==
+ (sizeof(K_ATOS_ENV_VAR) + sizeof(pid_str_)),
+ "sizes should match");
};
#undef K_ATOS_ENV_VAR