derek.holloway
7502bf64a4
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64 lines
2.4 KiB
C
64 lines
2.4 KiB
C
// RUN: %clang_analyze_cc1 \
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// RUN: -analyzer-checker=security.cert.env.InvalidPtr \
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// RUN: -analyzer-config security.cert.env.InvalidPtr:InvalidatingGetEnv=false \
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// RUN: -analyzer-output=text -verify -Wno-unused %s
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//
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// RUN: %clang_analyze_cc1 \
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// RUN: -analyzer-checker=security.cert.env.InvalidPtr \
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// RUN: -analyzer-config \
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// RUN: security.cert.env.InvalidPtr:InvalidatingGetEnv=true \
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// RUN: -analyzer-output=text -verify=expected,pedantic -Wno-unused %s
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#include "Inputs/system-header-simulator.h"
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char *getenv(const char *name);
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int setenv(const char *name, const char *value, int overwrite);
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int strcmp(const char *, const char *);
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int custom_env_handler(const char **envp);
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void getenv_after_getenv(void) {
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char *v1 = getenv("V1");
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// pedantic-note@-1{{previous function call was here}}
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char *v2 = getenv("V2");
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// pedantic-note@-1{{'getenv' call may invalidate the result of the previous 'getenv'}}
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strcmp(v1, v2);
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// pedantic-warning@-1{{use of invalidated pointer 'v1' in a function call}}
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// pedantic-note@-2{{use of invalidated pointer 'v1' in a function call}}
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}
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void setenv_after_getenv(void) {
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char *v1 = getenv("VAR1");
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setenv("VAR2", "...", 1);
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// expected-note@-1{{'setenv' call may invalidate the environment returned by 'getenv'}}
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strcmp(v1, "");
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// expected-warning@-1{{use of invalidated pointer 'v1' in a function call}}
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// expected-note@-2{{use of invalidated pointer 'v1' in a function call}}
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}
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int main(int argc, const char *argv[], const char *envp[]) {
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setenv("VAR", "...", 0);
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// expected-note@-1 2 {{'setenv' call may invalidate the environment parameter of 'main'}}
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*envp;
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// expected-warning@-1 2 {{dereferencing an invalid pointer}}
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// expected-note@-2 2 {{dereferencing an invalid pointer}}
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}
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void multiple_invalidation_no_duplicate_notes(void) {
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char *v1 = getenv("VAR1");
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setenv("VAR2", "...", 1); // no note here
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setenv("VAR3", "...", 1);
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// expected-note@-1{{'setenv' call may invalidate the environment returned by 'getenv'}}
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strcmp(v1, "");
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// expected-warning@-1{{use of invalidated pointer 'v1' in a function call}}
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// expected-note@-2{{use of invalidated pointer 'v1' in a function call}}
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}
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