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sclog: don't try to find libc functions outside libc.

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On AArch64, there are unexpectedly malloc and free functions in ld.so,
so the module-load function finds them there, wraps them, and then
misses the real versions in libc.
This commit is contained in:
Simon Tatham 2020-11-26 17:57:25 +00:00
parent b3f2726b83
commit e97a364d07
1 changed files with 27 additions and 24 deletions
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3
test/sclog/sclog.c
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@ -546,6 +546,7 @@ static void try_wrap_fn(const module_data_t *module, const char *name,
static void load_module( static void load_module(
void *drcontext, const module_data_t *module, bool loaded) void *drcontext, const module_data_t *module, bool loaded)
{ {
bool libc = !strncmp(dr_module_preferred_name(module), "libc", 4);
#define TRY_WRAP(fn, pre, post) do \ #define TRY_WRAP(fn, pre, post) do \
{ \ { \
@ -556,6 +557,7 @@ static void load_module(
if (loaded) { if (loaded) {
TRY_WRAP("log_to_file_real", wrap_logsetfile, NULL); TRY_WRAP("log_to_file_real", wrap_logsetfile, NULL);
TRY_WRAP("dry_run_real", NULL, wrap_dryrun); TRY_WRAP("dry_run_real", NULL, wrap_dryrun);
if (libc) {
TRY_WRAP("malloc", wrap_malloc_pre, wrap_alloc_post); TRY_WRAP("malloc", wrap_malloc_pre, wrap_alloc_post);
TRY_WRAP("realloc", wrap_realloc_pre, wrap_alloc_post); TRY_WRAP("realloc", wrap_realloc_pre, wrap_alloc_post);
TRY_WRAP("free", wrap_free_pre, unpause_post); TRY_WRAP("free", wrap_free_pre, unpause_post);
@ -583,6 +585,7 @@ static void load_module(
TRY_WRAP("cfree", wrap_free_pre, unpause_post); TRY_WRAP("cfree", wrap_free_pre, unpause_post);
} }
} }
}
/* /*
* Main entry point that sets up all the facilities we need. * Main entry point that sets up all the facilities we need.